<PAGE>   1

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                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                             ---------------------

                                   FORM 10-Q

<TABLE>
<C>               <S>
      [X]           QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                                SECURITIES EXCHANGE ACT OF 1934
                         For the quarterly period ended March 31, 2001
                                               OR
      [  ]            TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF
                              THE SECURITIES EXCHANGE ACT OF 1934
                  For the transition period from ____________ to ____________.
</TABLE>

                         COMMISSION FILE NUMBER 0-22411

                             ---------------------

                      SUMMIT PROPERTIES PARTNERSHIP, L.P.
             (Exact name of registrant as specified in its charter)

<TABLE>
<S>                                            <C>
                  DELAWARE                                      56-1857809
       (State or other jurisdiction of                       (I.R.S. Employer
       incorporation or organization)                       Identification No.)

           309 E. MOREHEAD STREET                                  28202
                  SUITE 200                                     (Zip code)
          CHARLOTTE, NORTH CAROLINA
  (Address of principal executive offices)
</TABLE>

                                 (704) 334-3000
              (Registrant's telephone number, including area code)

                                      N/A
   (Former name, former address and former fiscal year, if changed since last
                                    report)

Indicate by check whether the registrant (1) has filed all reports required to
be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days.  Yes [X]     No [ ]

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<PAGE>   2

                      SUMMIT PROPERTIES PARTNERSHIP, L.P.
                                     INDEX

<TABLE>
<CAPTION>
                                                                        PAGE
                                                                        ----
<S>       <C>                                                           <C>
PART I    FINANCIAL INFORMATION
Item 1    Financial Statements
          Consolidated Balance Sheets as of March 31, 2001 and
            December 31, 2000 (Unaudited).............................    3
          Consolidated Statements of Earnings for the three months
            ended March 31, 2001 and 2000 (Unaudited).................    4
          Consolidated Statement of Partners' Equity for the three
            months ended March 31, 2001 (Unaudited)...................    5
          Consolidated Statements of Cash Flows for the three months
            ended March 31, 2001 and 2000 (Unaudited).................    6
          Notes to Consolidated Financial Statements (Unaudited)......    7
Item 2    Management's Discussion and Analysis of Financial Condition
            and Results of Operations.................................   12
Item 3    Quantitative and Qualitative Disclosures about Market
            Risk......................................................   23
PART II   OTHER INFORMATION
Item 2    Changes in Securities.......................................   24
Item 5    Other Information...........................................   24
Item 6    Exhibits and Reports on Form 8-K............................   25
          Signatures..................................................   26
</TABLE>

                                        2
<PAGE>   3

PART I. FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

                       SUMMIT PROPERTIES PARTNERSHIP, LP.
                          CONSOLIDATED BALANCE SHEETS
                             (DOLLARS IN THOUSANDS)
                                  (UNAUDITED)

<TABLE>
<CAPTION>
                                                              MARCH 31,    DECEMBER 31,
                                                                 2001          2000
                                                              ----------   ------------
<S>                                                           <C>          <C>
ASSETS
Real estate assets:
  Land and land improvements................................  $  184,494    $  184,494
  Buildings and improvements................................   1,001,965     1,001,183
  Furniture, fixtures and equipment.........................      77,171        74,920
                                                              ----------    ----------
                                                               1,263,630     1,260,597
  Less: accumulated depreciation............................    (156,942)     (147,437)
                                                              ----------    ----------
          Operating real estate assets......................   1,106,688     1,113,160
  Construction in progress..................................     206,594       167,462
                                                              ----------    ----------
          Net real estate assets............................   1,313,282     1,280,622
Cash and cash equivalents...................................       2,440         3,148
Restricted cash.............................................       2,658        41,502
Investments in Summit Management Company and real estate
  joint ventures............................................        (415)          736
Deferred financing costs, net...............................       7,449         7,760
Other assets................................................       7,257         6,843
                                                              ----------    ----------
Total assets................................................  $1,332,671    $1,340,611
                                                              ==========    ==========
LIABILITIES AND PARTNERS' EQUITY
Liabilities:
  Notes payable.............................................  $  765,134    $  763,899
  Accounts payable and accrued expenses.....................      13,870        20,415
  Distributions payable.....................................      14,366        13,481
  Accrued interest payable..................................       5,026         7,729
  Security deposits and prepaid rents.......................       4,038         3,959
                                                              ----------    ----------
          Total liabilities.................................     802,434       809,483
                                                              ----------    ----------
Partners' common and preferred equity:
  Series B preferred units- 3,400,000 issued and
     outstanding............................................      82,713        82,713
  Series C preferred units- 2,200,000 issued and
     outstanding............................................      53,547        53,547
  Partnership common units issued and outstanding 31,077,041
     and 30,814,661
     General partner -- outstanding 310,770 and 308,147.....       4,671         4,680
     Limited partners -- outstanding 30,766,271 and
      30,506,514............................................     389,306       390,188
                                                              ----------    ----------
          Total partners' common and preferred equity.......     530,237       531,128
                                                              ----------    ----------
Total liabilities and partners' common and preferred
  equity....................................................  $1,332,671    $1,340,611
                                                              ==========    ==========
</TABLE>

See notes to consolidated financial statements.

                                        3
<PAGE>   4

                      SUMMIT PROPERTIES PARTNERSHIP, L.P.
                      CONSOLIDATED STATEMENTS OF EARNINGS
                 (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)
                                  (UNAUDITED)

<TABLE>
<CAPTION>
                                                                 THREE MONTHS ENDED
                                                                      MARCH 31,
                                                              -------------------------
                                                                 2001          2000
                                                              -----------   -----------
<S>                                                           <C>           <C>
Revenues:
  Rental....................................................  $    44,541   $    41,242
  Other property income.....................................        3,321         2,877
  Interest..................................................          758         1,074
  Other income..............................................          152           149
                                                              -----------   -----------
          Total revenues....................................       48,772        45,342
                                                              -----------   -----------
Expenses:
  Property operating and maintenance:
     Personnel..............................................        3,359         2,856
     Advertising and promotion..............................          617           606
     Utilities..............................................        2,262         2,111
     Building repairs and maintenance.......................        1,945         1,951
     Real estate taxes and insurance........................        5,413         4,741
     Depreciation...........................................        9,476         8,900
     Property supervision...................................        1,430         1,302
     Other operating expenses...............................          699           676
                                                              -----------   -----------
                                                                   25,201        23,143
  Interest..................................................        9,971         8,964
  Amortization..............................................          343           248
  General and administrative................................        1,204           940
  (Income) loss on equity investments:
     Summit Management Company..............................         (352)          322
     Real estate joint ventures.............................          (82)          (46)
                                                              -----------   -----------
          Total expenses....................................       36,285        33,571
                                                              -----------   -----------
     Income before gain on sale of real estate assets.......       12,487        11,771
     Gain on sale of real estate assets.....................           --         2,440
                                                              -----------   -----------
Net income..................................................       12,487        14,211
Distributions to Series B preferred unitholders.............       (1,902)       (1,902)
Distributions to Series C preferred unitholders.............       (1,203)       (1,203)
                                                              -----------   -----------
Income available to common unitholders......................        9,382        11,106
Income available to common unitholders allocated to general
  partner...................................................          (94)         (111)
                                                              -----------   -----------
Income available to common unitholders allocated to limited
  partners..................................................  $     9,288   $    10,995
                                                              ===========   ===========
Per unit data:
  Net income -- basic and diluted...........................  $      0.40   $      0.46
                                                              ===========   ===========
  Distributions to Series B preferred unitholders -- basic
     and diluted............................................  $     (0.06)  $     (0.06)
                                                              ===========   ===========
  Distributions to Series C preferred unitholders -- basic
     and diluted............................................  $     (0.04)  $     (0.04)
                                                              ===========   ===========
  Income available to common unitholders -- basic and
     diluted................................................  $      0.30   $      0.36
                                                              ===========   ===========
  Distributions declared....................................  $      0.46   $      0.44
                                                              ===========   ===========
  Weighted average units -- basic...........................   30,998,481    30,805,689
                                                              ===========   ===========
  Weighted average units -- diluted.........................   31,292,210    30,889,711
                                                              ===========   ===========
</TABLE>

See notes to consolidated financial statements.

                                        4
<PAGE>   5

                      SUMMIT PROPERTIES PARTNERSHIP, L.P.
                   CONSOLIDATED STATEMENT OF PARTNERS' EQUITY
                             (DOLLARS IN THOUSANDS)
                                  (UNAUDITED)

<TABLE>
<CAPTION>
                                                  SERIES B    SERIES C
                                                  PREFERRED   PREFERRED   GENERAL   LIMITED
                                                    UNITS       UNITS     PARTNER   PARTNER     TOTAL
                                                  ---------   ---------   -------   --------   --------
<S>                                               <C>         <C>         <C>       <C>        <C>
Balance, December 31, 2000......................   $82,713     $53,547    $4,680    $390,188   $531,128
  Distributions.................................        --          --      (145)    (14,289)   (14,434)
  Contributions from Summit Properties related
     to:
     Proceeds from reinvestment dividend and
       stock purchase plans.....................        --          --        20       1,935      1,955
     Exercise of stock options..................        --          --         5         476        481
     Amortization of restricted stock grants....        --          --         4         415        419
  Issuance of employee notes receivable.........        --          --       (10)       (982)      (992)
  Repayments of employee notes receivable.......        --          --         4         394        398
  Issuance of common units -- purchase of
     communities................................        --          --        19       1,881      1,900
  Distributions to preferred unitholders........        --          --       (31)     (3,074)    (3,105)
  Net income....................................        --          --       125      12,362     12,487
                                                   -------     -------    ------    --------   --------
Balance, March 31, 2001.........................   $82,713     $53,547    $4,671    $389,306   $530,237
                                                   =======     =======    ======    ========   ========
</TABLE>

See notes to consolidated financial statements.

                                        5
<PAGE>   6

                      SUMMIT PROPERTIES PARTNERSHIP, L.P.
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                             (DOLLARS IN THOUSANDS)
                                  (UNAUDITED)

<TABLE>
<CAPTION>
                                                              THREE MONTHS ENDED
                                                                   MARCH 31,
                                                              -------------------
                                                                2001       2000
                                                              --------   --------
<S>                                                           <C>        <C>
Cash flows from operating activities:
  Net income................................................  $ 12,487   $ 14,211
  Adjustments to reconcile net income to net cash provided
     by operating activities:
  (Income) loss on equity method investments................      (434)       276
  Gain on sale of real estate assets........................        --     (2,440)
  Depreciation and amortization.............................    10,258      9,211
  Increase in restricted cash...............................      (898)      (982)
  (Increase) decrease in other assets.......................      (206)        26
  (Decrease) Increase in accrued interest payable...........    (2,703)    (2,691)
  Decrease in accounts payable and accrued expenses.........      (339)    (2,981)
  Increase in security deposits and prepaid rents...........        79          7
                                                              --------   --------
          Net cash provided by operating activities.........    18,244     14,637
                                                              --------   --------
Cash flows from investing activities:
  Construction of real estate assets and land acquisitions,
     net of payables........................................   (38,609)   (29,517)
  Proceeds from sale of communities.........................    39,742     22,678
  Capitalized interest......................................    (3,290)    (2,320)
  Recurring capital expenditures............................    (1,002)      (952)
  Non-recurring capital expenditures........................    (2,130)      (943)
                                                              --------   --------
          Net cash used in investing activities.............    (5,289)   (11,054)
                                                              --------   --------
Cash flows from financing activities:
  Net borrowings on line of credit..........................     2,949     27,000
  Debt issuance costs related to unsecured bonds and
     medium-term notes......................................       (34)       (16)
  Repayments of mortgage debt...............................    (1,405)    (1,314)
  Repayments of tax exempt bonds............................      (360)      (360)
  Distributions to common unitholders.......................   (13,549)   (13,164)
  Distributions to Series B preferred unitholders...........    (1,902)    (1,902)
  Distributions to Series C preferred unitholders...........    (1,203)    (1,203)
  Increase in employee notes receivable.....................      (992)    (7,037)
  Repayments of employee notes receivable...................       398         --
  Contributions from Summit Properties related to:
     Proceeds from dividend and stock purchase plans and
      exercise of stock options.............................     2,435      1,904
     Repurchase of Summit Properties common stock...........        --     (6,333)
     Repurchase of common units in Operating Partnership....        --     (1,759)
                                                              --------   --------
          Net cash used in financing activities.............   (13,663)    (4,184)
                                                              --------   --------
Net decrease in cash and cash equivalents...................      (708)      (601)
Cash and cash equivalents, beginning of period..............     3,148      4,130
                                                              --------   --------
Cash and cash equivalents, end of period....................  $  2,440   $  3,529
                                                              ========   ========
Supplemental disclosure of cash flow information:
Cash paid for interest, net of capitalized interest.........  $ 12,674   $ 11,655
                                                              ========   ========
</TABLE>

See notes to consolidated financial statements.

                                        6
<PAGE>   7

SUMMIT PROPERTIES PARTNERSHIP, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
--------------------------------------------------------------------------------

Unless the context otherwise requires, all references to "we", "our" or "us" in
this report refer collectively to Summit Properties Partnership, L.P., a
Delaware limited partnership (the "Operating Partnership"), and its
subsidiaries. All references to "Summit" in this report refer to Summit
Properties Inc., a Maryland corporation and the sole general partner of the
Operating Partnership.

1. BASIS OF PRESENTATION

We have prepared the accompanying unaudited financial statements in accordance
with generally accepted accounting principles for interim financial information
and in conformity with the rules and regulations of the Securities and Exchange
Commission. Accordingly, they do not include all of the information and
footnotes required by generally accepted accounting principles for complete
financial statements. We have included all adjustments (consisting only of
normal recurring adjustments) necessary for a fair presentation. The results of
operations for the three months ended March 31, 2001 are not necessarily
indicative of the results that may be expected for the full year. You should
read our December 31, 2000 audited financial statements and notes included in
our Annual Report on Form 10-K in conjunction with these interim statements.

We conduct the business of operating, developing and acquiring "Class A" luxury
apartment communities for Summit, which is a self-administered and self-managed
real estate investment trust.

EARNINGS PER COMMON UNIT -- The only difference between "basic" and "diluted"
weighted average common units is the dilutive effect of Summit's outstanding
stock options. There were 293,729 common units added to weighted average common
units outstanding for the three months ended March 31, 2001 and 84,022 units
added to weighted average common units outstanding for the three months ended
March 31, 2000.

RECLASSIFICATIONS -- Certain reclassifications have been made to the 2000
financial statements to conform to the 2001 presentation.

2. REAL ESTATE JOINT VENTURES

We obtained a 25% interest in a joint venture named Station Hill, LLC, in which
we and Hollow Creek, LLC, a subsidiary of a major financial services company,
are members, in exchange for the contribution of two communities in 1998.
Station Hill owns, and we thereby hold a 25% interest in, five apartment
communities that we previously owned. We sold these five communities to Hollow
Creek in 1998 and Hollow Creek concurrently contributed them to Station Hill for
a 75% joint venture interest. Station Hill is accounted for on the equity method
of accounting.

The following is a condensed balance sheet and income statement for Station Hill
as of and for the three months ended March 31, 2001 and 2000 (in thousands). The
balance sheet and income statement below reflect the financial position and
operations of Station Hill in its entirety, not only our 25% interest.

<TABLE>
<CAPTION>
                                                                BALANCE SHEET
                                                              ------------------
                                                                  MARCH 31,
                                                              ------------------
                                                               2001       2000
                                                              -------    -------
<S>                                                           <C>        <C>
Real estate assets, net.....................................  $85,584    $88,534
Cash and cash equivalents...................................    1,748      2,041
Other assets................................................      398        365
                                                              -------    -------
          Total assets......................................  $87,730    $90,940
                                                              =======    =======
Mortgages payable...........................................  $68,448    $69,264
Other liabilities...........................................    1,031        985
Partners' capital...........................................   18,251     20,691
                                                              -------    -------
          Total liabilities and partners' capital...........  $87,730    $90,940
                                                              =======    =======
</TABLE>

                                        7
<PAGE>   8
SUMMIT PROPERTIES PARTNERSHIP, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) -- (CONTINUED)
--------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                                               INCOME STATEMENT
                                                              ------------------
                                                              THREE MONTHS ENDED
                                                                  MARCH 31,
                                                              ------------------
                                                               2001       2000
                                                              -------    -------
<S>                                                           <C>        <C>
Revenues....................................................  $3,180     $3,029
Expenses:
  Property operating........................................   1,090      1,058
  Interest..................................................   1,148      1,171
  Depreciation and amortization.............................     803        735
                                                              ------     ------
     Total expenses.........................................   3,041      2,964
                                                              ------     ------
Net income..................................................  $  139     $   65
                                                              ======     ======
</TABLE>

We also own a 49% interest in a joint venture which is developing an apartment
community. This project is accounted for under the equity method of accounting
and, therefore, its operating results are presented in "(Income) loss on equity
investments: Real estate joint ventures" in our consolidated statements of
earnings. The construction costs are being funded through a separate loan to the
joint venture from an unrelated third party equal to 100% of the construction
costs. During the construction period, rather than equity contributions to the
joint venture, we have, under certain circumstances, subsequent to demand by the
third party lender, agreed to make contributions, which would reduce the
construction loan by an amount not to exceed 25% of the total construction loan
amount. Any such contribution would be deemed to be all, or a portion, of the
equity we would be required to contribute to the joint venture at the end of the
construction and lease-up period. We have the right to purchase our joint
venture partner's interest in the joint venture for a period of six months after
the project becomes stabilized. The project had not reached stabilization as of
March 31, 2001 and we have not made a determination about whether we will
exercise our option. If we do not exercise our option with respect to the joint
venture, we will be required to make a capital contribution of 25% of the joint
venture's total construction loan amount.

3. NOTES PAYABLE

During 2000, we obtained a new syndicated unsecured line of credit in the amount
of $225.0 million which replaced our $200.0 million credit facility. The credit
facility provides funds for new development, acquisitions and general working
capital purposes. The credit facility has a three year term, expiring on
September 26, 2003, with annual extension options and bears interest at LIBOR
plus 100 basis points. The spread component of the aggregate interest rate will
be reduced in the event of an upgrade of our unsecured credit rating. The credit
facility is repayable monthly on an interest only basis with principal due at
maturity.

On April 20, 2000, we commenced a new program for the sale of up to $250.0
million aggregate principal amount of Medium-Term Notes due nine months or more
from the date of issuance. We had Medium-Term Notes with an aggregate principal
amount of $52.0 million outstanding in connection with the new MTN program at
March 31, 2001.

On May 29, 1998, we established a program for the sale of up to $95.0 million
aggregate principal amount of Medium-Term Notes due nine months or more from the
date of issuance. We had Medium-Term Notes with an aggregate principal amount of
$55.0 million outstanding in connection with this initial MTN program at March
31, 2001.

4. DERIVATIVE FINANCIAL INSTRUMENTS

On January 1, 2001, we adopted Statement of Financial Accounting Standard No.
133, "Accounting for Derivative Instruments and Hedging Activities", as amended.
FAS 133 establishes accounting and reporting

                                        8
<PAGE>   9
SUMMIT PROPERTIES PARTNERSHIP, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) -- (CONTINUED)
--------------------------------------------------------------------------------

standards for derivative instruments, including certain derivative instruments
embedded in other contracts, and for hedging activities. It requires that
entities recognize all derivatives as either assets or liabilities in the
statement of financial position and measure those instruments at fair value. The
cumulative effect of adopting FAS 133 was not material to our financial
statements.

We are exposed to market risk, such as changes in interest rates. To manage the
volatility relating to interest rate risk, we may enter into interest rate
hedging arrangements from time to time. We do not utilize derivative financial
instruments for trading or speculative purposes.

At March 31, 2001, we had one interest rate swap with a notional amount of $30.0
million, relating to $30.0 million of 6.625% fixed rate notes issued under our
MTN program. Under the interest rate swap agreement, through the maturity date
of December 15, 2003, (a) we have agreed to pay to the counterparty the interest
on a $30.0 million notional amount at a floating interest rate of three-month
LIBOR plus 11 basis points, and (b) the counterparty has agreed to pay to us the
interest on the same notional amount at the fixed rate. The floating rate at
March 31, 2001 was 5.14%. The fair value of the interest rate swap was $1.6
million at March 31, 2001. The swap has been designated as a fair value hedge of
the underlying fixed rate debt obligation and has been recorded as a reduction
of the related debt instrument. We assume no ineffectiveness as the interest
rate swap meets the short-cut method conditions required under FAS 133 for fair
value hedges of debt instruments. Accordingly, no gains or losses were recorded
in income relative to our underlying debt and interest rate swap.

5. RESTRICTED STOCK

During the three months ended March 31, 2001, Summit granted 94,818 shares of
restricted stock valued at $1.2 million pursuant to its Performance Stock Award
Plan. One half of these shares vested on the date of grant, with the remaining
shares vesting in two equal annual installments beginning on January 1, 2002.
The value of the shares has been recorded as unamortized restricted stock
compensation.

During the three months ended March 31, 2001 and 2000, Summit granted 11,668 and
63,138 shares, respectively, of restricted stock to employees under its 1994
Stock Option and Incentive Plan. The market value of the restricted stock grants
awarded during these three months in 2001 and 2000 totaled $292,000 and $1.1
million, respectively, and has been recorded as unamortized restricted stock
compensation. Unearned compensation related to these restricted stock grants is
being amortized to expense over the vesting period which ranges from three to
five years.

6. SUPPLEMENTAL CASH FLOW INFORMATION

Non-cash investing and financing activities for the three months ended March 31,
2001 and 2000 are as follows:

     A.   We accrued distributions payable in the amounts of $14.4 million and
          $13.4 million at March 31, 2001 and 2000, respectively.

     B.   Summit issued 11,668 and 63,138 shares of restricted stock valued at
          $292,000 and $1.1 million during the three months ended March 31, 2001
          and 2000, respectively.

     C.   Summit issued 94,818 shares of restricted stock valued at $1.2 million
          during the three months ended March 31, 2001 in connection with its
          Performance Stock Award Plan. There were no such issuances of
          restricted stock in connection with the plan during the three months
          ended March 31, 2000.

                                        9
<PAGE>   10
SUMMIT PROPERTIES PARTNERSHIP, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) -- (CONTINUED)
--------------------------------------------------------------------------------

     D.   Summit issued 4,012 and 35,045 shares of common stock in exchange for
          4,012 and 35,045 of our common units of limited partnership interest
          valued at $96,000 and $676,000 during the three months ended March 31,
          2001 and 2000, respectively.

     E.   We issued 66,376 common units valued at $1.9 million during the three
          months ended March 31, 2001 in connection with the purchase of a
          parcel of land.

7. COMMITMENTS AND CONTINGENCIES

The estimated cost to complete seven development projects currently under
construction was $90.5 million at March 31, 2001. Anticipated construction
completion dates of the projects range from the third quarter of 2001 to the
first quarter of 2003.

On January 19, 2000, we entered into a Real Estate Purchase Agreement with a
third-party real estate developer. Under the terms of the agreement, we have
agreed to purchase a "Class A" mixed-use community, which will be called Summit
Brickell, and will be located in Miami, Florida. We expect to close on the
purchase of Summit Brickell during the second half of 2002 following its
completion and lease-up. The final purchase price will be determined based on
actual construction costs plus a bonus to the developer based on the capitalized
income of the property at the time of purchase. The purchase price is expected
to range from $50.5 million to $60.0 million. The purchase of Summit Brickell is
subject to customary closing conditions. We issued a letter of credit in the
amount of $13.0 million, which will serve as a credit enhancement to the
developer's construction loan. In the event that any amount under the letter of
credit is drawn upon, we will be treated as having issued a loan to the
developer in the amount of such draw. Any such loan will accrue interest at a
rate of 18% per year.

We have investments in two technology-related companies, Broadband Now, Inc. and
Yieldstar Technology LLC. Our investment in Broadband Now is $1.2 million and
our investment in Yieldstar is $137,000. The technology industry, including
sectors in which our investees operate, has recently suffered from a depressed
market valuation and decreased supply of capital. The inability of these
companies to acquire capital at a satisfactory price in the near future could
affect their ability to fund working capital requirements and could result in
the failure of those companies. In the event that our investments in these
technology-related companies are deemed to be partially or fully impaired, any
resulting write-down of our investment(s) would not require cash payments, but
would have a negative impact on our net earnings and could adversely affect the
price of Summit's common stock.

8. BUSINESS SEGMENTS

We report as a single business segment with activities related to the operation,
development and acquisition of "Class A" luxury apartments located primarily in
the southeastern, southwestern and mid-atlantic United States. We develop
apartments solely for our own use and do not perform development activities for
third parties.

9. PREFERRED UNITS

As of March 31, 2001, we had outstanding 3.4 million preferred units of limited
partnership interest designated as 8.95% Series B Cumulative Redeemable
Perpetual Preferred Units. We may redeem these preferred units on or after April
29, 2004 for cash, or at our option, shares of Summit's 8.95% Series B
Cumulative Redeemable Perpetual Preferred Stock, or a combination of cash and
stock. Holders of the Series B preferred units have the right to exchange these
preferred units for shares of Summit's Series B Preferred Stock on a one-for-one
basis, subject to adjustment: (a) on or after April 29, 2009, (b) if full
quarterly distributions are not made for six quarters, or (c) upon the
occurrence of specified events related to our the treatment or treatment of the
preferred units for federal income tax purposes. Distributions on the

                                        10
<PAGE>   11
SUMMIT PROPERTIES PARTNERSHIP, L.P.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) -- (CONTINUED)
--------------------------------------------------------------------------------

Series B preferred units are cumulative from the date of original issuance and
are payable quarterly at the rate of 8.95% per year of the $25.00 original
capital contribution. We made distributions to the holders of the Series B
preferred units in the aggregate amount of $1.9 million during each of the
three-month periods ended March 31, 2001 and 2000.

As of March 31, 2001, we had outstanding 2.2 million preferred units of limited
partnership interest designated as 8.75% Series C Cumulative Redeemable
Perpetual Preferred Units. We may redeem the preferred units on or after
September 3, 2004 for cash. Holders of the Series C preferred units have the
right to exchange these preferred units for shares of Summit's Series C
Cumulative Redeemable Perpetual Preferred Stock on a one-for-one basis, subject
to adjustment: (a) on or after September 3, 2009, (b) if full quarterly
distributions are not made for six quarters, (c) upon the occurrence of
specified events related to our treatment or the treatment of the preferred
units for federal income tax purposes, or (d) if the holdings in the Operating
Partnership of the Series C unitholder exceed 18% of our total profits or
capital interests for a taxable year. Distributions on the Series C preferred
units are cumulative from the date of original issuance and are payable
quarterly at the rate of 8.75% per year of the $25.00 original capital
contribution. We made distributions to the holder of the Series C preferred
units in the aggregate amount of $1.2 million during each of the three-month
periods ended March 31, 2001 and 2000.

10. COMMON STOCK REPURCHASE PROGRAM

On March 12, 2000, Summit's Board of Directors authorized a common stock
repurchase program pursuant to which Summit is authorized to purchase up to an
aggregate of $25.0 million of currently issued and outstanding shares of its
common stock. All repurchases have been, and will be, made on the open market at
prevailing prices or in privately negotiated transactions. This authority may be
exercised from time to time and in such amounts as market conditions warrant.
Summit did not repurchase any shares of common stock during the three months
ended March 31, 2001. During the year ended December 31, 2000, Summit
repurchased 279,400 shares of common stock under the common stock repurchase
program for an aggregate purchase price, including commissions, of $5.5 million,
or an average price of $19.80 per share.

During 2000, Summit completed a common stock repurchase program pursuant to
which Summit was authorized to purchase up to an aggregate of $50.0 million of
its common stock. The total number of shares of common stock repurchased under
this program was 2.5 million shares for an aggregate purchase price, including
commissions, of $50.0 million, or an average price of $19.63 per share.

11. SUBSEQUENT EVENT

On May 9, 2001, we issued $60.0 million of senior unsecured notes through our
new medium-term note program in two separate transactions as follows: (a) $35.0
million of notes which are due on May 9, 2011 and bear interest at 7.703% per
year and (b) $25.0 million of notes which are due on May 9, 2006 and bear
interest at 7.04% per year. Proceeds from the issuance of these notes will be
used to repay borrowings under our unsecured credit facility.

                                        11
<PAGE>   12

ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
        OF OPERATIONS

This report contains forward-looking statements within the meaning of Section
27A of the Securities Act of 1933, as amended, and Section 21E of the Securities
Exchange Act of 1934, as amended, including, without limitation, statements
relating to the operating performance of fully stabilized communities, the
development, acquisition or disposition of properties, anticipated construction
completion and lease-up dates, and estimated development costs. You can identify
forward-looking statements by the use of the words "believe," "expect,"
"anticipate," "intend," "estimate," "assume" and other similar expressions which
predict or indicate future events and trends and which do not relate to
historical matters. You should not rely on forward-looking statements, because
they involve known and unknown risks, uncertainties and other factors, some of
which are beyond our control. These risks, uncertainties and other factors may
cause our actual results, performance or achievements to be materially different
from the anticipated future results, performance or achievements expressed or
implied by the forward-looking statements. Factors that could have a material
adverse effect on our operations and future prospects include, but are not
limited to:

- economic conditions generally and the real estate market specifically,
  including changes in occupancy rates and market rents;

- legislative or regulatory changes;

- availability of capital;

- changes in interest rates;

- uncertainties associated with our development activities, including the
  failure to obtain zoning and other approvals and increases in construction
  costs;

- the failure of acquisitions to yield expected results;

- the failure to sell communities marketed for sale or to sell communities in a
  timely manner or on favorable terms;

- construction delays due to the unavailability of materials, weather conditions
  or other delays;

- competition, which could limit our ability to secure attractive investment
  opportunities, lease apartment homes or increase or maintain rents;

- supply and demand for apartment communities in our current and proposed market
  areas, especially our core markets;

- changes in generally accepted accounting principles, or policies and
  guidelines applicable to REITs; and

- those factors discussed in the sections entitled "Operating Performance of
  Fully Stabilized Communities," on page 14 of this report and "Certain Factors
  Affecting the Performance of Development Communities," on page 21 of this
  report.

You should consider these risks and uncertainties when evaluating
forward-looking statements and you should not place undue reliance on such
statements. You should read the following discussion in conjunction with our
consolidated financial statements and notes, which accompany this report.

We focus on the operation, development and acquisition of "Class A" luxury
apartment communities throughout the southeast, southwest and mid-atlantic
United States. We focus our efforts in our seven core markets with particular
emphasis on the high growth areas of Washington, D.C., Southeast Florida and
Atlanta. Our other core markets are Dallas and Austin in Texas and Raleigh and
Charlotte in North Carolina.

HISTORICAL RESULTS OF OPERATIONS

Our net income is generated primarily from operations of our apartment
communities. The changes in operating results from period to period reflect
changes in existing community performance and changes in the number of apartment
homes due to development, acquisition, or disposition of communities. Where
                                        12
<PAGE>   13

appropriate, comparisons are made on a "fully stabilized communities,"
"acquisition communities," "stabilized development communities," "communities in
lease-up" and "disposition communities" basis in order to adjust for changes in
the number of apartment homes. A community is deemed to be "stabilized" when it
has attained a physical occupancy level of at least 93%. A community that we
have acquired is deemed "fully stabilized" when we have owned it for one year or
more as of the beginning of the current year. A community that we have developed
is deemed "fully stabilized" when stabilized for the two prior years as of the
beginning of the current year. A community is deemed to be a "stabilized
development" community when stabilized as of the beginning of the current year
but not the entire two prior years. All communities information is presented
before real estate depreciation and amortization expense. A community's average
physical occupancy is defined as the number of apartment homes occupied divided
by the total number of apartment homes contained in the communities, expressed
as a percentage. Average physical occupancy has been calculated using the
average of the occupancy that existed on Sunday during each week of the period.
Average monthly rental revenue presented represents the average monthly net
rental revenue per occupied apartment home. Our methodology for calculating
average physical occupancy and average monthly rental revenue may differ from
the methodology used by other apartment companies and, accordingly, may not be
comparable to other apartment companies.

 Results of Operations for the Three Months Ended March 31, 2001 and 2000

For the three months ended March 31, 2001, net income before gain on sale of
real estate assets increased $716,000 to $12.5 million from the three months
ended March 31, 2000 primarily due to increased property operating income
generated by our portfolio of communities, offset by increased interest costs
primarily as a result of increased average indebtedness outstanding.

OPERATING PERFORMANCE OF OUR PORTFOLIO OF COMMUNITIES

The operating performance of our communities for the three months ended March
31, 2001 and 2000 is summarized below (dollars in thousands):

<TABLE>
<CAPTION>
                                                           THREE MONTHS ENDED MARCH 31,
                                                           ----------------------------
                                                            2001      2000     % CHANGE
                                                           -------   -------   --------
<S>                                                        <C>       <C>       <C>
Property revenues:
  Stabilized communities (1).............................  $30,420   $29,150      4.4%
  Acquisition communities................................    1,270        --    100.0%
  Stabilized development communities.....................   13,261    10,416     27.3%
  Communities in lease-up................................    2,911       982    196.4%
  Communities sold.......................................       --     3,571   -100.0%
                                                           -------   -------
Total property revenues..................................   47,862    44,119      8.5%
                                                           -------   -------
Property operating and maintenance expense:
  Stabilized communities.................................   10,053     9,484      6.0%
  Acquisition communities................................      438        --    100.0%
  Stabilized development communities.....................    4,172     3,101     34.5%
  Communities in lease-up................................    1,062       515    106.2%
  Communities sold.......................................       --     1,143   -100.0%
                                                           -------   -------
Total property operating and maintenance expense.........   15,725    14,243     10.4%
                                                           -------   -------
Property operating income................................  $32,137   $29,876      7.6%
                                                           =======   =======
Apartment homes, end of period...........................   18,928    17,965      5.4%
                                                           =======   =======
</TABLE>

---------------

(1) Includes communities which were fully stabilized during the entire period
    for each of the comparable periods presented.

                                        13
<PAGE>   14

A summary of our apartment homes (excluding joint ventures) for the three months
ended March 31, 2001 and 2000 is as follows:

<TABLE>
<CAPTION>
                                                               2001     2000
                                                              ------   ------
<S>                                                           <C>      <C>
Apartment homes at January 1 of the year....................  18,928   17,673
Developments which began rental operations during the
  year......................................................      --      410
Sale of apartment homes.....................................      --     (118)
                                                              ------   ------
Apartment homes at March 31 of the year.....................  18,928   17,965
                                                              ======   ======
</TABLE>

OPERATING PERFORMANCE OF FULLY STABILIZED COMMUNITIES

The operating performance of our communities stabilized prior to January 1, 1999
is summarized below (dollars in thousands except average monthly rental
revenue):

<TABLE>
<CAPTION>
                                                            THREE MONTHS ENDED MARCH 31,
                                                            ----------------------------
                                                             2001      2000     % CHANGE
                                                            -------   -------   --------
<S>                                                         <C>       <C>       <C>
Property revenues:
  Rental..................................................  $28,420   $27,208      4.5%
  Other...................................................    2,000     1,942      3.0%
                                                            -------   -------
Total property revenues...................................   30,420    29,150      4.4%
                                                            -------   -------
Property operating and maintenance expense:
  Personnel...............................................    2,072     1,716     20.8%
  Advertising and promotion...............................      342       375     -8.8%
  Utilities...............................................    1,375     1,297      6.0%
  Building repairs and maintenance........................    1,317     1,328     -0.8%
  Real estate taxes and insurance.........................    3,621     3,427      5.7%
  Property supervision....................................      845       882     -4.2%
  Other operating expense.................................      481       459      4.8%
                                                            -------   -------
Total property operating and maintenance expense..........   10,053     9,484      6.0%
                                                            -------   -------
Property operating income.................................  $20,367   $19,666      3.6%
                                                            =======   =======
Average physical occupancy................................    93.6%     93.4%      0.2%
                                                            =======   =======
Average monthly rental revenue............................  $   918   $   883      4.0%
                                                            =======   =======
Number of apartment homes.................................   11,306    11,306
                                                            =======   =======
Number of apartment communities...........................       40        40
                                                            =======   =======
</TABLE>

The increase in property revenue from fully stabilized communities was primarily
the result of increases in average rental rates, as well as an improvement in
occupancy rates in 2001 when compared to 2000. The higher revenues were
primarily generated in our Florida, Washington, D.C., Wilmington, Delaware and
Austin, Texas markets. The increased revenues were offset by an increase of 6.0%
in property operating expenses, primarily personnel costs. The increase in
personnel costs for the three months ended March 31, 2001 as compared to the
same period in 2000 was primarily due to the timing of adjustments made for the
change in estimate of workers' compensation costs in each year. As a percentage
of total property revenue, total property operating and maintenance expenses
increased for the three-month period to 33.0% in 2001 from 32.5% in 2000.

                                        14
<PAGE>   15

OPERATING PERFORMANCE OF ACQUISITION COMMUNITIES

Acquisition communities for the three months ended March 31, 2001 consist of
Summit Sweetwater and Summit Shiloh, representing a total of 490 apartment
homes, in each of which we acquired our joint venture partner's 51% interest on
August 1, 2000. The operations of these two communities for the three months
ended March 31, 2001 are summarized as follows (dollars in thousands except
average monthly rental revenue):

<TABLE>
<S>                                                           <C>
Property revenues:
  Rental....................................................  $1,185
  Other.....................................................      85
                                                              ------
Total property revenues.....................................   1,270
Property operating and maintenance expense..................     438
                                                              ------
Property operating income...................................  $  832
                                                              ======
Average physical occupancy..................................   93.1%
                                                              ======
Average monthly rental revenue..............................  $  904
                                                              ======
Number of apartment homes...................................     490
                                                              ======
</TABLE>

OPERATING PERFORMANCE OF STABILIZED DEVELOPMENT COMMUNITIES

We had fifteen development communities (Summit Ballantyne, Summit Sedgebrook,
Summit Governor's Village, Summit Lake, Summit Russett, Summit Westwood, Summit
New Albany, Summit Fair Lakes, Summit Doral, Summit Largo, Summit Hunter's
Creek, Summit Ashburn Farm, Summit Deer Creek, Summit Fairview and Reunion Park
by Summit) which were stabilized during the entire three months ended March 31,
2001, but were stabilized subsequent to January 1, 1999. Summit Fairview is an
existing community which underwent major renovations during 1999 and 2000. Its
operating results are included in results of stabilized development communities
as it reached stabilization after renovation during 2000. The operating
performance of these fifteen communities for the three months ended March 31,
2001 and 2000 is summarized below (dollars in thousands except average monthly
rental revenue):

<TABLE>
<CAPTION>
                                                              THREE MONTHS ENDED
                                                                   MARCH 31,
                                                              -------------------
                                                                2001       2000
                                                              --------    -------
<S>                                                           <C>         <C>
Property revenues:
  Rental....................................................  $12,362     $9,748
  Other.....................................................      899        668
                                                              -------     ------
Total property revenues.....................................   13,261     10,416
Property operating and maintenance expense..................    4,172      3,101
                                                              -------     ------
Property operating income...................................  $ 9,089     $7,315
                                                              =======     ======
Average physical occupancy..................................    93.0%      82.5%
                                                              =======     ======
Average monthly rental revenue..............................  $   967     $  860
                                                              =======     ======
Number of apartment homes...................................    4,668      4,668
                                                              =======     ======
</TABLE>

The unleveraged yield on investment for the stabilized development communities,
defined as property operating income for the three months ended March 31, 2001
on an annualized basis over total development cost, was 10.4%.

                                        15
<PAGE>   16

OPERATING PERFORMANCE OF COMMUNITIES IN LEASE-UP

We had seven communities in lease-up during the three months ended March 31,
2001. Six of the seven communities in lease-up are new developments and one of
the communities in lease-up, Summit Lenox, is an existing community that
underwent major renovations during 1999 and 2000. A community in lease-up is
defined as one which has commenced rental operations but was not stabilized as
of the beginning of the current year. A summary of the six new development
communities in lease-up as of March 31, 2001 is as follows (dollars in
thousands):

<TABLE>
<CAPTION>
                                                         TOTAL       ACTUAL/                                  % LEASED
                                           NUMBER OF    ACTUAL/    ANTICIPATED                     Q1 2001      AS OF
                                           APARTMENT   ESTIMATED   CONSTRUCTION    ANTICIPATED     AVERAGE    MARCH 31,
COMMUNITY                                    HOMES       COST       COMPLETION    STABILIZATION   OCCUPANCY     2001
---------                                  ---------   ---------   ------------   -------------   ---------   ---------
<S>                                        <C>         <C>         <C>            <C>             <C>         <C>
Summit Russett II -- Laurel, MD..........      112     $ 10,600      Q4 2000         Q2 2001        59.3%       72.2%
Summit Grandview -- Charlotte, NC........      266       51,200      Q4 2000         Q4 2001        57.8%       75.9%
Summit Deerfield -- Cincinnati, OH (1)
  (2)....................................      498       41,500      Q3 2001         Q2 2002        25.8%       39.6%
Summit Overlook -- Raleigh, NC (2).......      320       25,500      Q3 2001         Q1 2002         2.8%       15.6%
Summit Crest -- Raleigh, NC (2)..........      438       30,700      Q3 2001         Q2 2002        11.6%       33.6%
Summit Peachtree City -- Atlanta, GA
  (2)....................................      399       31,500      Q4 2001         Q4 2002         3.9%       15.6%
                                             -----     --------
                                             2,033     $191,000
                                             =====     ========
</TABLE>

---------------

(1) Summit Deerfield is under contract for sale, expected during 2001, as part
    of our strategy to exit the midwest markets. We do not expect to realize a
    loss on sale of Summit Deerfield. The sale of Summit Deerfield is subject to
    customary closing conditions.
(2) The related assets of these properties are included in the "Construction in
    progress" category at March 31, 2001.

In addition to the communities listed in the table above, Summit Lenox in
Atlanta, Georgia is an existing community which underwent major renovations
during 1999 and 2000. The renovations included upgrades of the interior of the
apartment homes (new cabinets, fixtures and other interior upgrades), upgrades
to the parking lots and landscaping, as well as exterior painting of buildings.
The renovations required certain apartment homes to be unavailable for rental
over the course of the project. The operations of Summit Lenox are included in
results of our lease-up communities due to the renovation work. The renovation
work at Summit Lenox was substantially complete at March 31, 2001; but had not
yet reached stabilization after renovation.

All communities listed above were in lease-up during the three months ended
March 31, 2001. Summit Crest, Summit Overlook and Summit Peachtree City did not
have operating activity during the three months ended March 31, 2000 and,
therefore, the number of apartment homes and operating activity shown below for
2000 does not include these three communities.

The operating performance of our lease-up communities for the three months ended
March 31, 2001 and 2000 is summarized below (dollars in thousands):

<TABLE>
<CAPTION>
                                                              THREE MONTHS ENDED
                                                                  MARCH 31,
                                                              ------------------
                                                               2001       2000
                                                              -------    -------
<S>                                                           <C>        <C>
Property revenues:
  Rental....................................................  $2,575     $  941
  Other.....................................................     336         41
                                                              ------     ------
Total property revenues.....................................   2,911        982
Property operating and maintenance expense..................   1,062        515
                                                              ------     ------
Property operating income...................................  $1,849     $  467
                                                              ======     ======
Number of apartment homes...................................   2,464      1,307
                                                              ======     ======
</TABLE>

                                        16
<PAGE>   17

OPERATING PERFORMANCE OF DISPOSITION COMMUNITIES

We did not dispose of any communities during the three months ended March 31,
2001. The information in the table below represents operating results for the
three months ended March 31, 2000 for the following communities sold during 2000
(referred to in this report using former community names): Summit Creekside,
Summit Eastchester, Summit Sherwood, Summit Blue Ash, Summit Park, Summit River
Crossing and Summit Village (dollars in thousands):

<TABLE>
<S>                                                           <C>
Property revenues:
  Rental....................................................  $3,345
  Other.....................................................     226
                                                              ------
Total property revenues.....................................   3,571
Property operating and maintenance expense..................   1,143
                                                              ------
Property operating income...................................  $2,428
                                                              ======
Number of apartment homes...................................   1,676
                                                              ======
</TABLE>

OPERATING PERFORMANCE OF SUMMIT MANAGEMENT COMPANY

The operating performance of Summit Management Company and its wholly-owned
subsidiary, Summit Apartment Builders, Inc., for the three months ended March
31, 2001 and 2000 is summarized below (in thousands):

<TABLE>
<CAPTION>
                                                         THREE MONTHS ENDED MARCH 31,
                                                         ----------------------------
                                                          2001      2000     % CHANGE
                                                         ------    ------    --------
<S>                                                      <C>       <C>       <C>
Revenues:
  Management fees charged to our communities...........  $1,936    $1,468      31.9%
  Third party management fee revenue...................     234       278     -15.8%
  Construction revenue.................................     755       808      -6.6%
  Gain on sale of real estate assets...................      --       238    -100.0%
  Other revenue........................................      77        72       6.9%
                                                         ------    ------
          Total revenue................................   3,002     2,864       4.8%
                                                         ------    ------
Expenses:
  Operating............................................   2,420     2,571      -5.9%
  Depreciation.........................................      80        86      -7.0%
  Amortization.........................................      75        76      -1.3%
  Interest.............................................      75       453     -83.4%
                                                         ------    ------
          Total expenses...............................   2,650     3,186     -16.8%
                                                         ------    ------
Net income (loss)......................................  $  352    $ (322)    209.3%
                                                         ======    ======
</TABLE>

The increase in management fees charged to our communities for the three-month
period was primarily the result of an 8.5% increase in property revenues at our
communities, as well as an increase in fees earned for managing our communities
in lease-up. The decrease in operating expenses during the period was a result
of a decrease in the number of management personnel at the Management Company in
2001 as compared to 2000. In addition, interest expense decreased due to an
inter-company loan, which was repaid during 2000.

Property management revenues included property management fees from third
parties of $234,000 for the three months ended March 31, 2001 and $278,000 for
the same period in 2000. Property management fees from third parties as a
percentage of total property management revenues were 10.8% for the three months
ended March 31, 2001 and 15.9% for the same period in 2000. We expect third
party management revenues as a percentage of total property management revenues
to continue to decline.

All of the construction revenue during the three month periods ended March 31,
2001 and 2000 was from contracts with Summit.

                                        17
<PAGE>   18

OTHER INCOME AND EXPENSES

Interest expense increased by $1.0 million for the three months ended March 31,
2001 compared with the same period in 2000. This increase was primarily the
result of an increase in our average indebtedness outstanding, which increased
by $102.2 million. In addition, the effective interest rate increased to 6.88%
from 6.75% for the three months ended March 31, 2001 as compared to the same
period in 2000.

Depreciation expense increased $576,000, or 6.5%, for the three months ended
March 31, 2001 as compared with the same period in 2000, primarily due to the
initiation of depreciation on recently developed communities.

General and administrative expenses increased $264,000, or 28.1%, for the three
months ended March 31, 2001 as compared to the same period in 2000. This
increase was primarily the result of an increase in compensation costs of
$87,000 due to performance stock grants which vested during the three months
ended March 31, 2001, as well as an increase in the reserve for the costs of
abandoned pursuit projects of $90,000. As a percentage of revenues, general and
administrative expenses were 2.5% for the three months ended March 31, 2001 and
2.1% for the same period in 2000.

LIQUIDITY AND CAPITAL RESOURCES

  Liquidity

Our net cash provided by operating activities increased from $14.6 million for
the three months ended March 31, 2000 to $18.2 million for the same period in
2001, primarily due to a $2.3 million increase in property operating income and
a $2.6 million decrease in cash used in accounts payable and accrued expenses.

Net cash used in investing activities decreased from $11.1 million for the three
months ended March 31, 2000 to $5.3 million for the same period in 2001 due to a
$17.1 million increase in proceeds from the sale of communities offset by a $9.1
million increase in construction and land acquisition activity. Property sale
proceeds from six of seven communities sold during 2000 were placed in escrow in
accordance with like-kind exchange income tax rules and regulations. Proceeds
from the sale of communities represent funds expended from these like-kind
exchange escrows. In the event proceeds from these property sales are not fully
invested in qualified like-kind property during the required time period, a
special distribution may be made or company level tax may be incurred.

Net cash used in financing activities increased from $4.2 million during the
three months ended March 31, 2000 to $13.7 million for the same period in 2001
primarily due to a decrease in net borrowings on our credit facility of $24.1
million offset by a decrease in contributions received from the repurchase of
Summit's common stock of $6.3 million, a decrease in the repurchase of common
units of $1.8 million, and a decrease in cash used for employee notes receivable
from $7.3 million during the three months in 2000 compared to $1.0 million for
the same period in 2001.

The ratio of earnings to fixed charges was 1.36 for the three months ended March
31, 2001 as compared to 1.60 for the three months ended March 31, 2000. The
decrease is primarily the result of the absence of gain on property dispositions
during the first quarter of 2001 as compared to the same period in 2000.

Our outstanding indebtedness at March 31, 2001 totaled $765.1 million. This
amount included $301.6 million of fixed rate conventional mortgages, $37.0
million of variable rate tax-exempt bonds, $278.0 million of fixed rate
unsecured notes, $4.0 million of tax-exempt fixed rate mortgages, and $144.5
million under our unsecured credit facility.

We expect to meet our liquidity requirements over the next twelve months,
including recurring capital expenditures relating to maintaining our existing
communities, primarily through our working capital, net cash provided by
operating activities and borrowings under our unsecured credit facility. We
consider our cash provided by operating activities to be adequate to meet
operating requirements and payments of dividends and distributions during the
next twelve months. We expect to meet our long-term liquidity requirements, such
as scheduled mortgage debt maturities, property acquisitions, financing of
construction and development activities and other non-recurring capital
improvements, through the issuance of unsecured notes and equity

                                        18
<PAGE>   19

securities, from undistributed cash flow, from proceeds received from the
disposition of certain communities and, in connection with the acquisition of
land or improved property, through the issuance of common units.

  Credit Facility

We have a syndicated unsecured line of credit in the amount of $225.0 million.
The unsecured credit facility provides funds for new development, acquisitions
and general working capital purposes. The unsecured credit facility has a
three-year term with two one-year extension options and initially bears interest
at LIBOR plus 100 basis points based upon our current credit rating of BBB- by
Standard & Poor's Rating Services and Baa3 by Moody's Investors Service. The
interest rate will be reduced in the event an upgrade of our unsecured credit
rating is obtained. The unsecured credit facility also provides a bid option
sub-facility equal to a maximum of 50% of the total facility ($112.5 million).
This sub-facility provides us with the option to place borrowings in a fixed
LIBOR contract up to 180 days.

  Medium-Term Notes

On April 20, 2000, we commenced a new program for the sale of up to $250.0
million aggregate principal amount of Medium-Term Notes due nine months or more
from the date of issuance. We had Medium-Term Notes with an aggregate principal
amount of $52.0 million outstanding in connection with the new MTN program at
March 31, 2001.

On May 29, 1998, we established a program for the sale of up to $95.0 million
aggregate principal amount of Medium-Term Notes due nine months or more from the
date of issuance. We had Medium-Term Notes with an aggregate principal amount of
$55.0 million outstanding in connection with this initial MTN program at March
31, 2001.

  Derivative Financial Instruments

On January 1, 2001, we adopted Statement of Financial Accounting Standard No.
133, "Accounting for Derivative Instruments and Hedging Activities", as amended.
FAS 133 establishes accounting and reporting standards for derivative
instruments, including certain derivative instruments embedded in other
contracts, and for hedging activities. It requires that entities recognize all
derivatives as either assets or liabilities in the statement of financial
position and measure those instruments at fair value. The cumulative effect of
adopting FAS 133 was not material to our financial statements.

We are exposed to market risk, such as changes in interest rates. To manage the
volatility relating to interest rate risk, we may enter into interest rate
hedging arrangements from time to time. We do not utilize derivative financial
instruments for trading or speculative purposes.

At March 31, 2001, we had one interest rate swap with a notional amount of $30.0
million, relating to $30.0 million of 6.625% fixed rate notes issued under our
MTN Program. Under the interest rate swap agreement, through the maturity date
of December 15, 2003, (a) we have agreed to pay to the counterparty the interest
on a $30.0 million notional amount at a floating interest rate of three-month
LIBOR plus 11 basis points, and (b) the counterparty has agreed to pay to us the
interest on the same notional amount at the fixed rate. The floating rate at
March 31, 2001 was 5.14%. The fair value of the interest rate swap was $1.6
million at March 31, 2001. The swap has been designated as a fair value hedge of
the underlying fixed rate debt obligation and has been recorded as a reduction
of the related debt instrument. We assume no ineffectiveness as the interest
rate swap meets the short-cut method conditions required under FAS 133 for fair
value hedges of debt instruments. Accordingly, no gains or losses were recorded
in income relative to our underlying debt and interest rate swap.

  Preferred Units

As of March 31, 2001, we had outstanding 3.4 million preferred units of limited
partnership interest designated as 8.95% Series B Cumulative Redeemable
Perpetual Preferred Units. We may redeem these preferred units on or after April
29, 2004 for cash, or at our option, shares of Summit's 8.95% Series B

                                        19
<PAGE>   20

Cumulative Redeemable Perpetual Preferred Stock, or a combination of cash and
stock. Holders of the Series B preferred units have the right to exchange these
preferred units for shares of Summit's Series B Preferred Stock on a one-for-one
basis, subject to adjustment: (a) on or after April 29, 2009, (b) if full
quarterly distributions are not made for six quarters, or (c) upon the
occurrence of specified events related to our the treatment or treatment of the
preferred units for federal income tax purposes. Distributions on the Series B
preferred units are cumulative from the date of original issuance and are
payable quarterly at the rate of 8.95% per year of the $25.00 original capital
contribution. We made distributions to the holders of the Series B preferred
units in the aggregate amount of $1.9 million during each of the three-month
periods ended March 31, 2001 and 2000.

As of March 31, 2001, we had outstanding 2.2 million preferred units of limited
partnership interest designated as 8.75% Series C Cumulative Redeemable
Perpetual Preferred Units. We may redeem the preferred units on or after
September 3, 2004 for cash. Holders of the Series C preferred units have the
right to exchange these preferred units for shares of Summit's Series C
Cumulative Redeemable Perpetual Preferred Stock on a one-for-one basis, subject
to adjustment: (a) on or after September 3, 2009, (b) if full quarterly
distributions are not made for six quarters, (c) upon the occurrence of
specified events related to our treatment or the treatment of the preferred
units for federal income tax purposes, or (d) if the holdings in the Operating
Partnership of the Series C unitholder exceed 18% of our total profits or
capital interests for a taxable year. Distributions on the Series C preferred
units are cumulative from the date of original issuance and are payable
quarterly at the rate of 8.75% per year of the $25.00 original capital
contribution. We made distributions to the holder of the Series C preferred
units in the aggregate amount of $1.2 million during each of the three-month
periods ended March 31, 2001 and 2000.

  Common Stock Repurchase Program

On March 12, 2000, Summit's Board of Directors authorized a common stock
repurchase program pursuant to which Summit is authorized to purchase up to an
aggregate of $25.0 million of currently issued and outstanding shares of its
common stock. All repurchases have been, and will be, made on the open market at
prevailing prices or in privately negotiated transactions. This authority may be
exercised from time to time and in such amounts as market conditions warrant.
Summit did not repurchase any shares of common stock during the three months
ended March 31, 2001. During the year ended December 31, 2000, Summit
repurchased 279,400 shares of common stock under the common stock repurchase
program for an aggregate purchase price, including commissions, of $5.5 million,
or an average price of $19.80 per share.

During 2000, Summit completed a common stock repurchase program pursuant to
which Summit was authorized to purchase up to an aggregate of $50.0 million of
its common stock. The total number of shares of common stock repurchased under
this program was 2.5 million shares for an aggregate purchase price, including
commissions, of $50.0 million, or an average price of $19.63 per share.

  Employee Loan Program

Summit's Board of Directors believes that ownership of its common stock by
executive officers and certain other qualified employees will align the
interests of these officers and employees with the interests of Summit's
stockholders. To this end, Summit's Board of Directors approved and Summit
instituted a loan program under which Summit may lend amounts to certain of its
executive officers and other qualified employees to (a) finance the purchase of
Summit's common stock on the open market at then-current market prices, (b)
finance the payment of the exercise price of one or more stock options to
purchase shares of Summit's common stock, or (c) finance the annual tax
liability or other expenses of an executive officer related to the vesting of
shares of Summit's common stock which constitute a portion of a restricted stock
award granted to the executive officer. Summit has amended the terms of the loan
program from time to time since its inception in 1997. The relevant officer or
employee has executed a Promissory Note and Security Agreement related to each
loan extended. These notes bear interest at the applicable federal rate as
established by the Internal Revenue Service, are full recourse to the officers
and employees and are collateralized by the shares of Summit's common stock
which are the subject of the loans.

                                        20
<PAGE>   21

COMMUNITIES BEING MARKETED FOR SALE

At March 31, 2001, we had two apartment communities under contract for sale with
a net book value of $58.4 million. We do not anticipate incurring a loss on any
individual apartment community sale. Proceeds from the sale of the communities
are expected to be used to fund future development. The two apartment
communities held for sale represented 2.5% of property operating income for all
of our communities for the three months ended March 31, 2001. The sale of each
of these communities is subject to customary closing conditions. We cannot
assure you that these communities or other communities that we market for sale
will be sold in a timely manner or on favorable terms or at all.

DEVELOPMENT ACTIVITY

Our construction in progress at March 31, 2001 is summarized as follows (dollars
in thousands):

<TABLE>
<CAPTION>
                                                            TOTAL                ESTIMATED   ANTICIPATED
                                              APARTMENT   ESTIMATED   COST TO     COST TO    CONSTRUCTION
COMMUNITY                                       HOMES       COSTS       DATE     COMPLETE     COMPLETION
---------                                     ---------   ---------   --------   ---------   ------------
<S>                                           <C>         <C>         <C>        <C>         <C>
Summit Deerfield -- Cincinnati, OH (1)
  (3).......................................      498     $ 41,500    $ 38,344    $ 3,156      Q3 2001
Summit Overlook -- Raleigh, NC (1)..........      320       25,500      19,182      6,318      Q3 2001
Summit Crest-Raleigh, NC (1)................      438       30,700      25,670      5,030      Q3 2001
Summit Peachtree City -- Atlanta, GA (1)....      399       31,500      29,016      2,484      Q4 2001
Summit Grand Parc -- Washington, DC.........      105       29,400      14,812     14,588      Q1 2002
Summit Brookwood -- Atlanta, GA.............      359       41,500       8,300     33,200      Q4 2002
Summit Valley Brook -- Philadelphia, PA.....      352       37,000      11,247     25,753      Q1 2003
Other development and construction costs
  (2).......................................       --           --      60,023         --
                                                -----     --------    --------    -------
                                                2,471     $237,100    $206,594    $90,529
                                                =====     ========    ========    =======
</TABLE>

---------------

(1) These communities were in lease-up at March 31, 2001.
(2) Consists primarily of land held for development and other pre-development
    costs.
(3) Summit Deerfield is under contract for sale, expected in 2001, as part of
    our strategy to exit the midwest markets. We do not expect to realize a loss
    upon sale of Summit Deerfield, which is subject to customary closing
    conditions.

Estimated costs to complete the development communities represent substantially
all of our material commitments for capital expenditures at March 31, 2001.

  Certain Factors Affecting the Performance of Development Communities

We are optimistic about the operating prospects of the communities under
construction. However, as with any development effort, there are uncertainties
and risks associated with the communities described above. While we have
prepared development budgets and have estimated completion and stabilization
target dates based on what we believe are reasonable assumptions in light of
current conditions, there can be no assurance that actual costs will not exceed
current budgets or that we will not experience construction delays due to the
unavailability of materials, weather conditions or other events.

Other development risks include the possibility of incurring additional costs or
liabilities resulting from defects in construction material, and the possibility
that financing may not be available on favorable terms, or at all, to pursue or
complete development activities. Similarly, market conditions at the time these
communities become available for leasing will affect the rental rates that may
be charged and the period of time necessary to achieve stabilization, which
could make one or more of the development communities unprofitable or result in
achieving stabilization later than currently anticipated.

In addition, we are conducting feasibility and other pre-development work for
ten communities. We could abandon the development of any one or more of these
potential communities in the event that we determine that market conditions do
not support development, financing is not available on favorable terms or other
circumstances exist which may prevent development. Similarly, there can be no
assurance that, if we do

                                        21
<PAGE>   22

pursue one or more of these potential communities, we will be able to complete
construction within the currently estimated development budgets or construction
can be started at the time currently anticipated.

COMMITMENTS AND CONTINGENCIES

The estimated cost to complete seven development projects currently under
construction was $90.5 million at March 31, 2001. Anticipated construction
completion dates of the projects range from the third quarter of 2001 to the
first quarter of 2003.

On January 19, 2000, we entered into a Real Estate Purchase Agreement with a
third-party real estate developer. Under the terms of the agreement, we have
agreed to purchase a "Class A" mixed-use community, which will be called Summit
Brickell, and will be located in Miami, Florida. We expect to close on the
purchase of Summit Brickell during the second half of 2002 following its
completion and lease-up. The final purchase price will be determined based on
actual construction costs plus a bonus to the developer based on the capitalized
income of the property at the time of purchase. The purchase price is expected
to range from $50.5 million to $60.0 million. The purchase of Summit Brickell is
subject to customary closing conditions. We issued a letter of credit in the
amount of $13.0 million, which will serve as a credit enhancement to the
developer's construction loan. In the event that any amount under the letter of
credit is drawn upon, we shall be treated as having issued a loan to the
developer in the amount of such draw. Any such loan will accrue interest at a
rate of 18% per year.

We have investments in two technology-related companies, Broadband Now, Inc. and
Yieldstar Technology LLC. Our investment in Broadband Now is $1.2 million and
our investment in Yieldstar is $137,000. The technology industry, including
sectors in which our investees operate, has recently suffered from a depressed
market valuation and decreased supply of capital. The inability of these
companies to acquire capital at a satisfactory price in the near future could
affect their ability to fund working capital requirements and could result in
the failure of those companies. In the event that our investments in these
technology-related companies are deemed to be partially or fully impaired, any
resulting write-down of our investment(s) would not require cash payment, but
would have a negative impact on our net earnings and could adversely affect the
price of Summit's common stock.

FUNDS FROM OPERATIONS

We consider funds from operations ("FFO") to be an appropriate measure of
performance of an equity REIT. We compute FFO in accordance with standards
established by the National Association of Real Estate Investment Trusts
("NAREIT"). FFO, as defined by NAREIT, represents net income (loss) excluding
gains or losses from sales of property, plus depreciation of real estate assets,
and after adjustments for unconsolidated partnerships and joint ventures, all
determined on a consistent basis in accordance with generally accepted
accounting principles ("GAAP"). Funds Available for Distribution ("FAD") is
defined as FFO less capital expenditures funded by operations (recurring capital
expenditures). Our methodology for calculating FFO and FAD may differ from the
methodology for calculating FFO and FAD utilized by other real estate companies,
and accordingly, may not be comparable to other real estate companies. FFO and
FAD do not represent amounts available for management's discretionary use
because of needed capital expenditures or expansion, debt service obligations,
property acquisitions, development, dividends and distributions or other
commitments and uncertainties. FFO and FAD should not be considered as
alternatives to net income (determined in accordance with GAAP) as an indication
of our financial performance or to cash flows from operating activities
(determined in accordance with GAAP) as a measure of our liquidity, nor are they
indicative of funds available to fund our cash needs, including our ability to
make dividend or distribution payments. We believe FFO and FAD are helpful to
investors as measures of our performance because, along with cash flows from
operating activities, financing activities and investing activities, they
provide investors with an understanding of our ability to incur and service debt
and make capital expenditures.

                                        22
<PAGE>   23

FFO and FAD for the three months ended March 31, 2001 and 2000 are calculated as
follows (dollars in thousands):

<TABLE>
<CAPTION>
                                                                 THREE MONTHS ENDED
                                                                      MARCH 31,
                                                              -------------------------
                                                                 2001          2000
                                                              -----------   -----------
<S>                                                           <C>           <C>
Income available to common unitholders......................  $     9,382   $    11,106
Gain on sale of real estate assets..........................           --        (2,440)
Gain on sale of real estate assets--Management Company......           --          (238)
                                                              -----------   -----------
     Subtotal...............................................        9,382         8,428
Depreciation:
  Real estate assets........................................        9,386         8,852
  Real estate joint venture.................................          198           184
                                                              -----------   -----------
Funds from Operations.......................................       18,966        17,464
Recurring capital expenditures (1)..........................       (1,002)         (952)
                                                              -----------   -----------
Funds Available for Distribution............................  $    17,964   $    16,512
                                                              ===========   ===========
Non-recurring capital expenditures (1) (2)..................  $     2,130   $       943
                                                              ===========   ===========
Cash Flow Provided By (Used In):
  Operating Activities......................................  $    18,244   $    14,637
  Investing Activities......................................       (5,289)      (11,054)
  Financing Activities......................................      (13,663)       (4,184)
Weighted average units outstanding -- diluted...............   31,292,210    30,889,711
                                                              ===========   ===========
</TABLE>

---------------

(1) Recurring capital expenditures are expected to be funded from operations and
    consist primarily of interior painting, carpets, new appliances, vinyl,
    blinds, tile, and wallpaper. In contrast, non-recurring capital
    expenditures, such as major improvements, new garages and access gates, are
    expected to be funded by financing activities and, therefore, are not
    included in the calculation of FAD.
(2) Non-recurring capital expenditures for the three months ended March 31, 2001
    and 2000 primarily consist of: $133,000 and $134,000 for major renovations
    in 2001 and 2000, respectively; $91,000 and $41,000 for access gates and
    security fences in 2001 and 2000, respectively; and $892,000 and $644,000 in
    other revenue enhancement expenditures in 2001 and 2000, respectively.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

There has been no material change in our market risk since the filing of our
Annual Report on Form 10-K for the year ended December 31, 2000.

                                        23
<PAGE>   24

                                    PART II

ITEM 2. CHANGES IN SECURITIES

During the three months ended March 31, 2001, we issued common units in private
placements in reliance on the exemption from registration under Section 4(2) of
the Securities Act in the amounts and for the consideration set forth below:

     A.   Summit issued an aggregate of 89,766 shares of common stock pursuant
          to its Dividend Reinvestment and Stock Purchase Plans. Summit
          contributed the proceeds ($2.0 million) of these sales to us in
          consideration of an aggregate of 89,766 common units.

     B.   Summit issued an aggregate of 11,668 shares of common stock in
          connection with restricted stock awards. Each time a share of common
          stock is issued in connection with a restricted award, we issue a
          common unit to Summit during the relevant period; consequently, 11,668
          common units have been issued to Summit.

     C.   Summit issued an aggregate of 27,150 shares of common stock pursuant
          to the exercise of stock options. Summit contributed the proceeds
          ($481,000) of these options to us in consideration of an aggregate of
          27,150 common units.

     D.   We issued 66,376 common units valued at $1.9 million in connection
          with the acquisition of a parcel of land.

In light of the circumstances under which common units were issued and
information obtained by us in connection with such transactions, management of
Summit, in its capacity as our general partner, believes that we may rely on
such exemption.

ITEM 5. OTHER INFORMATION

Succession Plan

On March 28, 2001, Summit announced a succession plan pursuant to which William
F. Paulsen, Co-Chairman of the Board of Directors and Chief Executive Officer of
Summit, will transition from his position as Chief Executive Officer effective
July 1, 2001. Mr. Paulsen intends to remain as Co-Chairman of the Board of
Directors of Summit at that time. Steven R. LeBlanc, President and Chief
Operating Officer of Summit, will succeed Mr. Paulsen in the role of Chief
Executive Officer. At the same time, Michael L. Schwarz, Executive Vice
President and Chief Financial Officer of Summit, will assume Mr. LeBlanc's
responsibilities for property operations.

Medium-Term Note Program

On May 8, 2001, our program for the sale of up to $250.0 million aggregate
principal amount of Medium-Term Notes due nine months or more from the date of
issuance was amended to allow us to accept offers to purchase Medium-Term Notes
through additional agents and dealers. The program was commenced on April 20,
2000, with J.P. Morgan Securities Inc., First Union Securities, Inc., Merrill
Lynch, Pierce, Fenner & Smith Incorporated and Morgan Stanley & Co. Incorporated
as the exclusive agents. Offers through additional agents and dealers are
required to be made on substantially the same terms as those applicable to sales
of Medium-Term Notes through the original agents.

                                        24
<PAGE>   25

ITEM 6. EXHIBITS AND REPORTS ON FORM 8-K

(a) Exhibits

<TABLE>
<S>     <C>
10.1    Promissory Note and Security Agreement, dated February 6,
        2001, evidencing a loan of $107,032 to Randall M. Ell for
        the purpose of purchasing shares of common stock of Summit
        Properties Inc. (incorporated herein by reference to Exhibit
        10.1 to Summit's Quarterly report on Form 10-Q for the
        quarterly period ended March 31, 2001, File No. 1-12792)
10.2    First Amendment to Distribution Agreement dated as of May 8,
        2001, by and among Summit Properties Inc., Summit Properties
        Partnership, L.P. and the agents named therein (incorporated
        herein by reference to Exhibit 10.2 to Summit's Quarterly
        report on Form 10-Q for the quarterly period ended March 31,
        2001, File No. 1-12792)
10.3    Bylaws of Summit Properties Inc. (incorporated herein by
        reference to Exhibit 3.2 to Summit's Registration Statement
        on Form S-11, Registration No. 33-90706)
10.4    First Amendment to Bylaws of Summit Properties Inc.
        (incorporated herein by reference to Exhibit 3.2 to Summit's
        Quarterly Report on Form 10-Q for the quarterly period ended
        March 31, 2001, File No. 1-12792)
10.5    Second Amendment to Bylaws of Summit Properties Inc.
        (incorporated herein by reference to Exhibit 3.3 to Summit's
        Quarterly Report on Form 10-Q for the quarterly period ended
        March 31, 2001, File No. 1-12792)
*12.1   Statement Regarding Calculation of Ratio of Earnings to
        Fixed Charges for the three months ended March 31, 2001.
</TABLE>

---------------

* Filed herewith

(b) Reports on Form 8-K

We did not file any reports on Form 8-K in the first quarter of 2001.

                                        25
<PAGE>   26

                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

<TABLE>
<S>                                             <C>
                                                    SUMMIT PROPERTIES PARTNERSHIP, L.P.
                                                   By: Summit Properties Inc., as General
                                                                  Partner

May 9, 2001                                                /s/ William F. Paulsen
--------------------------------------------    --------------------------------------------
(Date)                                                      William F. Paulsen,
                                                   Co-Chairman of the Board of Directors
                                                        and Chief Executive Officer

May 9, 2001                                                /s/ Michael L. Schwarz
--------------------------------------------    --------------------------------------------
(Date)                                                      Michael L. Schwarz,
                                                   Executive Vice President -- Operations
                                                        and Chief Financial Officer
</TABLE>

                                        26