Document:

<PAGE>
                                                                   Exhibit 10(r)
                                                                  EXECUTION COPY

                                JOINDER AGREEMENT

         Reference is made to the Term Loan Agreement, dated as of July 31, 2000
(as amended, supplemented or otherwise modified from time to time, the "Loan
Agreement"), among GGP Limited Partnership, GGPLP L.L.C., the institutions from
time to time parties thereto as Lenders, Lehman Commercial Paper Inc., as
Syndication Agent, and Bankers Trust Company, as Administrative Agent. Unless
otherwise defined herein, terms defined in the Loan Agreement and used herein
shall have the meanings given to them in the Loan Agreement.

         Bayerische Hypo-Und Vereinsbank AG, New York Branch (the "Joining
Lender") (i) represents and warrants that it is legally authorized to enter into
this Joinder Agreement; (ii) confirms that it has received a copy of the Loan
Agreement, together with copies of such other documents and information as it
has deemed appropriate to make its own credit analysis and decision to enter
into this Joinder Agreement; (iii) agrees that it will, independently and
without reliance upon the Co-Agents or any other Lender and based on such
documents and information as it shall deem appropriate at the time, continue to
make its own credit decisions in taking or not taking action under the Loan
Agreement; (iv) appoints and authorizes the Co-Agents to take such action as
agent on its behalf and to exercise such powers under the Loan Agreement as are
delegated to the Co-Agents by the terms thereof, together with such powers as
are reasonably incidental thereto; (v) agrees that it will perform in accordance
with their terms all of the obligations which by the terms of the Loan Agreement
are required to be performed by it as a Lender; (vi) confirms that, to the best
of its knowledge, as of the date hereof, it is not subject to any law,
regulation or guideline from any central bank or other Governmental Authority or
quasi-governmental authority exercising jurisdiction, power or control over it,
which would subject the Borrower to the payment of additional compensation under
Section 13.2 or under Section 13.3 of the Loan Agreement; (vii) specifies as its
Domestic Lending Office (and address for notices) and Eurodollar Lending
Office(s) the offices set forth on Schedule 1 hereto; and (viii) if the Joining
Lender is organized under the laws of a jurisdiction outside the United States,
attaches the forms prescribed by the Internal Revenue Service of the United
States certifying as to the Joining Lender's status for purposes of determining
exemption from United States withholding taxes with respect to all payments to
be made to the Joining Lender under the Loan Agreement and the Notes or such
other documents as are necessary to indicate that all such payments are subject
to such taxes at a rate reduced by an applicable tax treaty.

         Upon execution and delivery of this Joinder Agreement by the parties
hereto as provided in Section 3.2 of the Loan Agreement, (a) the Joining Lender
hereby shall be a party to the Loan Agreement, shall be a Lender under the Loan
Agreement having the Loan Commitments set forth in Schedule 1 hereto, effective
as of the date of this Joinder Agreement, and shall have the rights and
obligations of a Lender under the Loan Agreement and (b) the Maximum Aggregate
Loan Amount shall be increased to $125,000,000.00.

         THIS JOINDER AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED AND
INTERPRETED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.
<PAGE>

                                                                               2

         This Joinder Agreement may be executed by one or more of the parties
hereto on any number of separate counterparts, and all of said counterparts
taken together shall be deemed to constitute one and the same instrument.
Delivery of an executed signature page hereof by facsimile transmission shall be
effective as delivery of a manually executed counterpart hereof.
<PAGE>

                                                                               3

         IN WITNESS WHEREOF, the parties hereto have caused this Joinder
Agreement to be duly executed and delivered by their proper and duly authorized
officers as of this 1/st/ day of September, 2000.

                                    BAYERISCHE HYPO-UND VEREINSBANK
                                    AG, NEW YORK BRANCH

                                    By: _____________________________________
                                        Name:
                                        Title:

Accepted and agreed:

GGP LIMITED PARTNERSHIP, a Delaware limited partnership

By:  GENERAL GROWTH PROPERTIES, INC.,
     a Delaware corporation, its sole general partner

     By: _______________________________________
         Name:  Bernard Freibaum
         Title: Executive Vice President

GGPLP L.L.C., a Delaware limited liability company

By:  GGP LIMITED PARTNERSHIP,
     a Delaware corporation, its managing member

     By: GENERAL GROWTH PROPERTIES, INC.,
         a Delaware corporation. its sole general partner

         By: ___________________________________
             Name:  Bernard Freibaum
             Title: Executive Vice President
<PAGE>

                                                                      Schedule 1

                     LOAN COMMITMENT AND NOTICE ADDRESSES

1.       Name of Lender:                    Bayerische Hypo-und Vereinsbank AG,
                                            New York Branch
         Notice Address and
         Domestic Lending Office:           150 East 42/nd/ Street
                                            New York, New York  10017
         Attention:                         Christine Elcik
         Telephone:                         212-672-5740
         Facsimile:                         212-672-5527

         Eurodollar Lending Office:
                                            150 East 42/nd/ Street
                                            New York, New York  10017
         Attention:                         Christine Elcik
         Telephone:                         212-672-5740
         Facsimile:                         212-672-5527

2.       Loan Commitment:                   $25,000,000.00
         Adjusted Pro Rata Share:           20.0%<PAGE>
                                                                   Exhibit 10(s)
                                      NOTE

$25,000,000.00                                                New York, New York
                                                              September 1, 2000

         FOR VALUE RECEIVED, the undersigned, GGP LIMITED PARTNERSHIP, a
Delaware limited partnership, and GGPLP L.L.C., a Delaware limited liability
company (individually and collectively, the "Borrower"), jointly and severally,
hereby unconditionally promise to pay to the order of BAYERISCHE HYPO-UND
VEREINSBANK AG, NEW YORK BRANCH (the "Lender") at the office of Bankers Trust
Company, located at 130 Liberty Street, New York, New York 10006 in lawful money
of the United States of America and in immediately available funds, the
principal amount of TWENTY-FIVE MILLION DOLLARS ($25,000,000.00), or, if less,
the unpaid principal amount of the Loans made by the Lender pursuant to Section
2.1 or Article III of the Term Loan Agreement, as hereinafter defined. The
Borrower further agrees to pay interest in like money at such office on the
unpaid principal amount hereof from time to time outstanding at the rates and on
the dates specified in Section 5.1 of such Term Loan Agreement.

         The holder of this Note is authorized to endorse on the schedules
annexed hereto and made a part hereof or on a continuation thereof which shall
be attached hereto and made a part hereof the date, type and amount of the
Loan(s) evidenced hereby and the date and amount of each payment or prepayment
of principal with respect thereto, each conversion of all or a portion thereof
to another type, each continuation of all or a portion thereof as the same type
and, in the case of Eurodollar Rate Loans, the length of each Interest Period
with respect thereto. Each such endorsement shall constitute prima facie
evidence of the accuracy of the information endorsed. The failure to make any
such endorsement shall not affect the obligations of the Borrower in respect of
such Loan.

         This Note (a) is one of the Notes referred to in the Term Loan
Agreement dated as of July 31, 2000 (as amended, supplemented or otherwise
modified from time to time, the "Term Loan Agreement"), among the Borrower, the
Lender, the other institutions from time to time parties thereto as lenders and
Bankers Trust Company, as administrative agent, (b) is subject to the provisions
of the Term Loan Agreement and (c) is subject to voluntary and mandatory
prepayment in whole or in part as provided in the Term Loan Agreement. This Note
is guaranteed as provided in the Loan Documents. Reference is made to the Loan
Documents for the nature and extent of the guarantees, the terms and conditions
upon which each guarantee was granted and the rights of the holder of this Note
in respect thereof.

         Upon the occurrence and during the continuance of any one or more of
the Events of Default, all amounts then remaining unpaid on this Note shall
become, or may be declared to be, immediately due and payable, all as provided
in the Term Loan Agreement.
<PAGE>

                                                                               2

         To the extent not prohibited by law, all parties now and hereafter
liable with respect to this Note, whether maker, principal, surety, guarantor,
endorser or otherwise, hereby waive presentment, demand, protest and all other
notices of any kind.

         Unless otherwise defined herein, terms defined in the Term Loan
Agreement and used herein shall have the meanings given to them in the Term Loan
Agreement.

         NOTWITHSTANDING ANYTHING TO THE CONTRARY CONTAINED HEREIN OR IN THE
TERM LOAN AGREEMENT, THIS NOTE MAY NOT BE TRANSFERRED EXCEPT PURSUANT TO AND IN
ACCORDANCE WITH THE REGISTRATION AND OTHER PROVISIONS OF SECTION 15.1 OF THE
TERM LOAN AGREEMENT. THIS NOTE SHALL BE GOVERNED BY, AND CONSTRUED AND
INTERPRETED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK.

            [The remainder of this page is intentionally left blank]
<PAGE>

         IN WITNESS WHEREOF, the Borrower has caused this Note to be executed
and delivered by its duly authorized officer as of the day and year first above
written.

                                GGPLP L.L.C., a Delaware limited liability
                                company

                                By:  GGP LIMITED PARTNERSHIP, a Delaware
                                limited partnership, its sole managing member

                                By:  GENERAL GROWTH PROPERTIES, INC., a
                                Delaware corporation, its sole general partner

                                By:
                                    --------------------------------------------
                                   Name:  Bernard Freibaum
                                   Title:  Executive Vice President

                                GGP LIMITED PARTNERSHIP, a Delaware
                                limited partnership

                                By:  GENERAL GROWTH PROPERTIES, INC., a
                                Delaware corporation, its sole general partner

                                By:
                                    --------------------------------------------
                                   Name:  Bernard Freibaum
                                   Title:  Executive Vice President
<PAGE>

                                                                      Schedule A
                                                                         to Note
                                                                         -------

             LOANS, CONVERSIONS AND REPAYMENTS OF BASE RATE LOANS

<TABLE>
<CAPTION>
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                              Amount         Amount of Principal     Amount of Base Rate      Unpaid Principal
         Amount of Base    Converted to          of Base Rate         Loans Converted to       Balance of Base
  Date     Rate Loans     Base Rate Loans        Loans Repaid        Eurodollar Rate Loans        Rate Loans        Notation Made By
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<S>      <C>              <C>                <C>                     <C>                      <C>                   <C>
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</TABLE>
<PAGE>

                                                                      Schedule B
                                                                         to Note
                                                                         -------

    LOANS, CONTINUATIONS, CONVERSIONS AND REPAYMENTS OF EURODOLLAR RATE LOANS

<TABLE>
<CAPTION>
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                                        Interest Period and   Amount of Principal  Amount of Eurodollar  Unpaid Principal
          Amount of   Amount Converted    Eurodollar Rate        of Eurodollar          Rate Loans         Balance of
         Eurodollar     to Eurodollar       with Respect          Rate Loans        Converted to Base      Eurodollar      Notation
  Date   Rate Loans       Rate Loans           Thereto              Repaid             Rate Loans          Rate Loans       Made By
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<S>      <C>          <C>               <C>                  <C>                   <C>                    <C>               <C>
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</TABLE>

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