<PAGE>   1
                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   FORM 10-Q/A
                                 AMENDMENT NO. 1

(Mark One)

[X]  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
     ACT OF 1934

For the quarterly period ended            JUNE 30, 1996

                                       or

[  ] TRANSITION REPORT PURSUANT TO 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF
     1934

For the transition period from                       to

Commission file number                       0-11982

        CORPORATE PROPERTY ASSOCIATES 4, A CALIFORNIA LIMITED PARTNERSHIP
             (Exact name of registrant as specified in its charter)

<TABLE>
<S>                                                               <C>
                       CALIFORNIA                                               13-3126150
(State or other jurisdiction of incorporation or organization)    (I.R.S. Employer Identification No.)

50 ROCKEFELLER PLAZA, NEW YORK, NEW YORK                                        10020
(Address of principal executive offices)                                      (Zip Code)
</TABLE>

                                 (212) 492-1100
              (Registrant's telephone number, including area code)


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


      Indicate by check mark 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.

                                                                  [X] Yes [ ] No



                APPLICABLE ONLY TO ISSUERS INVOLVED IN BANKRUPTCY
                  PROCEEDINGS DURING THE PRECEDING FIVE YEARS:

   Indicate by check mark whether the registrant has filed all documents and
reports required to be filed by Section 12, 13 or 15(d) of the Securities
Exchange Act of 1934 subsequent to the distribution of securities under a plan
confirmed by a court.

                                                                  [ ] Yes [ ] No
<PAGE>   2
                        CORPORATE PROPERTY ASSOCIATES 4,
                        a California limited partnership






                                      INDEX



                                                                  Page No.
                                                                  --------
 PART I

 Item 1. - Financial Information*

          Balance Sheets, December 31, 1995 and
          June 30, 1996                                               2

          Statements of Income for the three and six
          months ended June 30, 1995 and 1996                         3

          Statements of Cash Flows for the six
          months ended June 30, 1995 and 1996                         4

          Notes to Financial Statements                              5-7


 Item 2. - Management's Discussion of Operations                      8



 PART II

 Signatures                                                           9







*The summarized financial information contained herein is unaudited; however in
the opinion of management, all adjustments necessary for a fair presentation of
such financial information have been included.


                                      -1-
<PAGE>   3
                        CORPORATE PROPERTY ASSOCIATES 4,
                        a California limited partnership


                                     PART I

                         Item 1. - FINANCIAL INFORMATION

                                 BALANCE SHEETS


<TABLE>
<CAPTION>
                                           December 31,    June 30,
                                               1995          1996
                                              (Note)      (Unaudited)
                                           ------------   -----------
<S>                                        <C>            <C>
      ASSETS:

Land and buildings, net of
   accumulated depreciation of
   $13,362,508 at December 31, 1995 and
   $13,058,958 at June 30, 1996            $21,472,233    $14,006,003
Net investment in direct
   financing leases                         18,224,428     18,209,646
Real estate held for sale                                   6,981,065
Cash and cash equivalents                    7,579,071      7,991,659
Other assets                                 1,232,343      1,751,413
                                           -----------    -----------
        Total assets                       $48,508,075    $48,939,786
                                           ===========    ===========
      LIABILITIES:

Mortgage notes payable                     $19,486,882    $19,022,525
Accrued interest payable                       136,087        126,149
Accounts payable and accrued expenses          435,977        475,610
Accounts payable to affiliates                  87,461        159,403
                                           -----------    -----------
        Total liabilities                   20,146,407     19,783,687
                                           -----------    -----------
      PARTNERS' CAPITAL:

General Partners                                62,061        111,606

Limited Partners (85,568 Limited
Partnership Units issued and
outstanding)                                28,299,607     29,044,493
                                           -----------    -----------
        Total partners' capital             28,361,668     29,156,099
                                           -----------    -----------
        Total liabilities and
          partners' capital                $48,508,075    $48,939,786
                                           ===========    ===========
</TABLE>

The accompanying notes are an integral part of the financial statements.


Note: The balance sheet at December 31, 1995 has been derived from the audited
      financial statements at that date.


                                      -2-
<PAGE>   4
                        CORPORATE PROPERTY ASSOCIATES 4,
                        a California limited partnership


                        STATEMENTS OF INCOME (UNAUDITED)


<TABLE>
<CAPTION>
                                             Three Months Ended                       Six Months Ended
                                     June 30, 1995       June 30, 1996       June 30, 1995       June 30, 1996
                                     -------------       -------------       -------------       -------------
<S>                                  <C>                 <C>                 <C>                 <C>
Revenues:
  Rental income from
   operating leases                    $  812,363          $1,387,643          $1,620,490          $2,222,984
  Interest from direct
   financing leases                     1,352,754             827,821           2,705,771           1,655,955
  Revenue from hotel
   operations                             951,953             978,918           1,948,846           2,003,001
  Other interest income                    24,866              95,010              51,524             190,366
  Other income                              1,972                                  44,764
                                       ----------          ----------          ----------          ----------
                                        3,143,908           3,289,392           6,371,395           6,072,306
                                       ----------          ----------          ----------          ----------
Expenses:
  Interest on mortgages                   605,848             428,939           1,200,367             864,411
  Depreciation                            292,142             216,199             581,151             492,814
  General and administrative              103,723             160,088             243,986             250,976
  Property expense                         79,866             134,275             172,996             201,335
  Operating expenses of hotel
   operations                             593,089             604,566           1,182,557           1,195,856
  Amortization                             31,150              25,767              62,300              51,534
                                       ----------          ----------          ----------          ----------
                                        1,705,818           1,569,834           3,443,357           3,056,926
                                       ----------          ----------          ----------          ----------
   Income before gain on
   sale of real estate                  1,438,090           1,719,558           2,928,038           3,015,380

Gain on sale of real
  estate                                3,497,872                               3,497,872
                                       ----------          ----------          ----------          ----------
     Net income                        $4,935,962          $1,719,558          $6,425,910          $3,015,380
                                       ==========          ==========          ==========          ==========
Net income allocated
  to General Partners                  $  616,832          $  103,173          $  706,229          $  180,923
                                       ==========          ==========          ==========          ==========
Net income allocated
  to Limited Partners                  $4,319,130          $1,616,385          $5,719,681          $2,834,457
                                       ==========          ==========          ==========          ==========
Net income per Unit
  (85,568 Limited
  Partnership Units)                   $    50.47          $    18.89          $    66.84          $    33.13
                                       ==========          ==========          ==========          ==========
</TABLE>

The accompanying notes are an integral part of the financial statements.


                                      -3-
<PAGE>   5
                        CORPORATE PROPERTY ASSOCIATES 4,
                        a California limited partnership




                      STATEMENTS OF CASH FLOWS (UNAUDITED)



<TABLE>
<CAPTION>
                                                                  Six Months Ended
                                                                      June 30,
                                                            ----------------------------
                                                                1995             1996
                                                            ------------     -----------
<S>                                                         <C>              <C>
Cash flows from operating activities:
  Net income                                                $  6,425,910     $ 3,015,380
  Adjustments to reconcile net income to net
    cash provided by operating activities:
    Depreciation and amortization                                643,451         544,348
    Amortization of unearned income on direct
     financing leases and straight-line rents on
     operating leases less (greater) than scheduled
     rents                                                        12,476        (236,864)
    Gain on sale of real estate                               (3,497,872)
    Net change in operating assets and liabilities              (450,309)       (217,321)
                                                            ------------     -----------
     Net cash provided by operating activities                 3,133,656       3,105,543
                                                            ------------     -----------
Cash flows from investing activities:
  Proceeds from sale of real estate                           15,200,000
  Additional capitalized costs                                   (91,009)         (7,649)
                                                            ------------     -----------
     Net cash provided by (used in) investing activities      15,108,991          (7,649)
                                                            ------------     -----------
Cash flows from financing activities:
  Distributions to partners                                   (2,445,970)     (2,220,949)
  Payments on mortgage principal                                (712,143)       (464,357)
  Prepayment of mortgage payable                              (5,722,508)
                                                            ------------     -----------
     Net cash used in financing activities                    (8,880,621)     (2,685,306)
                                                            ------------     -----------
       Net increase in cash and cash equivalents               9,362,026         412,588

    Cash and cash equivalents, beginning of period             2,509,451       7,579,071
                                                            ------------     -----------
       Cash and cash equivalents, end of period             $ 11,871,477     $ 7,991,659
                                                            ============     ===========
Supplemental disclosure of cash flows information:

         Interest paid                                      $  1,249,530     $   874,349
                                                            ============     ===========
</TABLE>

The accompanying notes are an integral part of the financial statements.


                                      -4-
<PAGE>   6
                        CORPORATE PROPERTY ASSOCIATES 4,
                        a California limited partnership



                    NOTES TO FINANCIAL STATEMENTS (UNAUDITED)


Note 1.  Basis of Presentation:

The accompanying unaudited financial statements have been prepared in accordance
with generally accepted accounting principles for interim financial information
and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X.
Accordingly, they do not include all of the information and footnotes required
by generally accepted accounting principles for complete financial statements.
In the opinion of management, all adjustments (consisting of normal recurring
accruals) considered necessary for a fair presentation have been included. For
further information, refer to the financial statements and footnotes thereto
included in the Partnership's Annual Report on Form 10-K for the year ended
December 31, 1995.


Note 2.  Distributions to Partners:

Distributions declared and paid to partners during the six months ended June 30,
1996 are summarized as follows:

<TABLE>
<CAPTION>
  Quarter Ended      General Partners    Limited Partners    Per Limited Partner Unit
  -------------      ----------------    ----------------    ------------------------
<S>                  <C>                 <C>                 <C>
December 31, 1995        $65,633            $1,043,930                $12.20
                         =======            ==========                ======
March 31, 1996           $65,745            $1,045,641                $12.22
                         =======            ==========                ======
</TABLE>

A distribution of $12.24 per Limited Partner Unit for the quarter ended June 30,
1996 was declared and paid in July 1996.

Note 3.  Transactions with Related Parties:

For the three-month and six-month periods ended June 30, 1995, the Partnership
incurred management fees of $26,491 and $53,494, respectively, and general and
administrative expense reimbursements of $10,390 and $42,730, respectively. For
the three-month and six-month periods ended June 30, 1996, the Partnership
incurred management fees of $59,049 and $81,073, respectively, and general and
administrative expense reimbursements of $56,390 and $79,331, respectively.

The Partnership, in conjunction with certain affiliates, is a participant in a
cost sharing agreement for the purpose of renting and occupying office space.
Under the agreement, the Partnership pays its proportionate share of rent and
other costs of occupancy. Net expenses incurred for the six-months ended June
30, 1995 and 1996 were $77,092 and $35,508, respectively.


                                      -5-
<PAGE>   7
                        CORPORATE PROPERTY ASSOCIATES 4,
                        a California limited partnership



             NOTES TO FINANCIAL STATEMENTS (UNAUDITED) - (CONTINUED)




Note 4.  Industry Segment Information:

The Partnership's operations consist of the investment in and the leasing of
industrial and commercial real estate and operation of a hotel business (see
Note 5). For the six-month periods ended June 30, 1995 and 1996, the Partnership
earned its total lease revenues (rental income plus interest income from
financing leases) from the following lease obligors:

<TABLE>
<CAPTION>
                                        1995       %             1996       %
                                        ----      ---            ----      ---
<S>                                <C>            <C>       <C>            <C>
Hughes Markets, Inc.               $   714,710     17       $ 1,307,494     34
Simplicity Manufacturing, Inc.         998,356     23           998,356     25
Brodart Co.                            659,906     15           657,600     17
Continental Casualty Company           375,689      9           379,924     10
Family Dollar Stores, Inc.             273,600      6           276,000      7
Petrocon Engineering, Inc.             184,134      4           187,209      5
Winn-Dixie Stores, Inc.                 72,356      2            72,356      2
Genesco, Inc.                        1,047,510     24
                                   -----------    ---       -----------    ---
                                   $ 4,326,261    100%      $ 3,878,939    100%
                                   ===========    ===       ===========    ===
</TABLE>

Note 5.  Hotel Property in Kenner, Louisiana:

The Partnership and Corporate Property Associates 8 ("CPA(R):8"), an affilliate,
purchased a hotel property in Kenner, Louisiana, in June 1988 as
tenants-in-common with 46.383% and 53.617% interests, respectively. The
Partnership contributed $3,479,000 in the form of an exchange of another
property owned by the Partnership and CPA(R):8 contributed $4,021,000 of equity
and $10,000,000 was supplied by mortgage financing. The Partnership and CPA(R):8
assumed operating control of the hotel in 1992 after evicting the lessee due to
its financial difficulties. On July 30, 1996, the Partnership and CPA(R):8
entered into a transaction with American General Hospitality Operating
Partnership L.P. (the "Operating Partnership"), the operating partnership of a
newly-formed real estate investment trust, American General Hospitality, Inc.
("AGH") in which the Partnership and CPA(R):8 received 920,672 limited
partnership units (of which the Partnership's share is 427,008 units) in
exchange for their ownership interests in the hotel property, a cash
contribution of $388,331 (of which the Partnership's share is $180,120) and the
Operating Partnership's assumption of the Partnership's and CPA(R):8's mortgage
loan obligation collateralized by the hotel property (of which the Partnership's
share was approximately $3,389,000).

The exchange of the hotel property for limited partnership units will initially
be treated as a nonmonetary exchange for tax and financial reporting purposes.
After one year, the Partnership will have the right to convert its equity
interest in the operating partnership to shares of common stock in AGH, which
recently completed an initial public offering, with such shares registered with
the Securities and Exchange Commission. In connection with the transaction, the
$6,981,065 carrying value of the hotel property was classified as real estate
held for sale as of June 30, 1996. The Partnership's and CPA(R):8's limited
partnership units had a fair value of approximately $16,342,000 (of which the
Partnership's share is $7,579,000) at the date of the exchange.


                                      -6-
<PAGE>   8
                        CORPORATE PROPERTY ASSOCIATES 4,
                        a California limited partnership



             NOTES TO FINANCIAL STATEMENTS (UNAUDITED) - (CONTINUED)





Operating results of the hotel for the six-month periods ended June 30, 1995 and
1996 are summarized as follows:

<TABLE>
<CAPTION>
                                        1995                    1996
                                   -----------              -----------
<S>                                <C>                      <C>
Revenues                           $ 1,948,846              $ 2,003,001
Fees paid to hotel management
   company                             (69,605)                 (78,545)
Other operating expenses            (1,112,952)              (1,117,311)
                                   -----------              -----------
Hotel operating income             $   766,289              $   807,145
                                   ===========              ===========
</TABLE>

Note 6.  Property Leased to Hughes Markets, Inc.:

The Partnership and Corporate Property Associates 3 ("CPA(R):3"), an affiliate,
own a dairy processing facility in Los Angeles, California as tenants-in-common
with 83.24% and 16.76% ownership interests, respectively. On May 1, 1996, the
Partnership and CPA(R):3 entered into a lease amendment agreement with the
lessee, Hughes Markets, Inc. ("Hughes"), to extend the lease term which initial
term had expired on April 30, 1996 to April 30, 1998. Under the extension
agreement, Hughes' monthly rent increased to $336,166 (of which the
Partnership's share is $279,825) from $151,686 (of which the Partnership's share
was $126,266). At the end of the lease term, Hughes is obligated to pay a lump
sum rental payment of $3,500,000 (of which the Partnership's share will be
approximately $2,913,000). Hughes has an option to extend the lease on a
month-to-month basis for up to six months at a rental of $500,000 per month.

In accordance with the lease amendment agreement, Hughes has provided the
Partnership and CPA(R):3 an irrevocable letter of credit of $3,500,000, an
amount equal to Hughes' lump sum payment obligation. For financial reporting
purposes, the $3,500,000 rental payable due at the end of the lease term is
being recognized on a straight-line basis over the term of the lease extension
period.


                                      -7-
<PAGE>   9
                        CORPORATE PROPERTY ASSOCIATES 4,
                        a California limited partnership

                 Item 2. - MANAGEMENT'S DISCUSSION OF OPERATIONS



Results of Operations:

    Net income decreased by $3,216,000 and $3,411,000 for the three-month and
six-month periods ended June 30, 1996, respectively, as compared with the
similar periods ended June 30, 1995. Excluding a gain of $3,498,000 realized in
June 1995 on the sale of property leased to Genesco, Inc. ("Genesco"), income
would have reflected increases of $282,000 and $87,000 for the three-month and
six-month periods, respectively. These increases in income were realized even
though Genesco contributed 24% of the Partnership's lease revenues prior to the
sale and were due to decreases in depreciation and interest expenses and an
increase in other interest income. The effect of these items was partially
offset for the comparable six-month periods by a decrease in lease revenues.

    The decrease in interest expense was due to the continuing amortization of
the Partnership's mortgage loans and the satisfaction of the loan on the Genesco
property at the time of the aforementioned sale. The decrease in depreciation
was due to lower charges as a result of classifying the hotel property as real
estate held for sale. Other interest income increased as the Partnership had
higher average cash balances in 1996 than in 1995. The decrease in lease
revenues for the comparable six-month periods was solely attributable to the
effect of the Genesco transaction. For the comparable three-month periods,
overall lease revenues increased. This increase was due to the lease extension
agreement, effective May 1, 1996, with Hughes Markets, Inc. ("Hughes") which
lease was extended for two years through April 30, 1988. Annual cash flow will
increase by $1,843,000 during the extension period as a result of the new
agreement with Hughes. Additionally, the Partnership will receive a lump sum
payment of approximately $2,910,000 at the end of this period.

    Income from the hotel segment increased by approximately 5%; however, the
Partnership ceased operating the hotel on July 30, 1996 when it exchanged its
ownership interest in the hotel property for limited partnership units in the
operating partnership of a newly-formed real estate investment trust, American
General Hospitality, Inc. ("AGH"). The Partnership's annual cash flow from its
interest in the operating partnership is initially projected to be approximately
$700,000


Financial Condition:

    There has been no material change in the Partnership's financial condition
since December 31, 1995. Cash flow from operations of $3,105,000 was sufficient
to fund distributions to partners of $2,221,000 and payments of scheduled
principal payment installments of $464,000. Mortgage debt service will decrease
as the result of the assignment of the mortgage loan obligation on the hotel
property in July 1996. Such assignment will reduce the Partnership's outstanding
mortgage loan balance by 18%.

    AGH owns a diversified portfolio of hotel properties, and one of the
requirements for a real estate investment trust is to distribute at least 95% of
its taxable income in order to retain its special Federal income tax status;
therefore, cash flow from the interest in the operating partnership is expected
to be relatively stable. The Partnership hopes to eliminate the uncertainty
related to operating a single hotel business. Although the Partnership's share
of cash flow from the hotel operation after debt service was approximately
$1,024,000 in 1995, the Partnership funded improvements in excess of $750,000 in
the prior year. Funding major capital improvements at the hotel property was
needed to remain competitive. If ownership of the hotel were retained, the
Partnership would be required to use funds for additional improvements in the
future. Accordingly, cash flow from the hotel could fluctuate significantly from
year to year. With the exchange, the Partnership should achieve less fluctuation
in cash flow and eliminate the need for allocating funds for capital
improvements.


                                      -8-
<PAGE>   10
                        CORPORATE PROPERTY ASSOCIATES 4,
                        a California limited partnership


                                     PART II




                                   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.


                                  CORPORATE PROPERTY ASSOCIATES 4,
                                  a California limited partnership



                                  By:  CAREY CORPORATE PROPERTY, INC.




         04/10/97                 By:      /s/ Claude Fernandez
       ------------                       -----------------------------
           Date                           Claude Fernandez
                                          Executive Vice President and
                                          Chief Administrative Officer
                                          (Principal Financial Officer)





         04/10/97                 By:      /s/ Michael D. Roberts
       ------------                       -----------------------------
           Date                           Michael D. Roberts
                                          First Vice President and Controller
                                          (Principal Accounting Officer)


                                      -9-