<PAGE>
                                                                  Exhibit 10.6

                   AMENDMENT NO. 2 TO REVOLVING CREDIT AGREEMENT
                                          
                                       among
                                          
                               MACK-CALI REALTY, L.P.
                                          
                                        and
                                          
                             THE CHASE MANHATTAN BANK,
                              FLEET NATIONAL BANK and
                           OTHER LENDERS WHICH MAY BECOME
                                  PARTIES THERETO
                                          
                                        with
                                          
                             THE CHASE MANHATTAN BANK,
                              AS ADMINISTRATIVE AGENT,
                                          
                                FLEET NATIONAL BANK,
                               AS SYNDICATION AGENT,
                                          
                          PNC BANK, NATIONAL ASSOCIATION,
                               AS DOCUMENTATION AGENT
                                          
                                    NATIONSBANK,
                               AS DOCUMENTATION AGENT
                                          
                               CHASE SECURITIES INC.
                              and FLEET NATIONAL BANK,
                                    AS ARRANGERS
                                          
                                  BANKERS TRUST, 
                           COMMERZBANK AKTIENGESELLSCHAFT
                                  NEW YORK BRANCH,
                        FIRST NATIONAL BANK OF CHICAGO, and
                             FIRST UNION NATIONAL BANK,
                                 AS MANAGING AGENTS
                                          
                                        and
                                          
                       CREDITANSTALT CORPORATE FINANCE, INC.,
                             DRESDNER BANK AG, NEW YORK
                          BRANCH AND GRAND CAYMAN BRANCH,
                              EUROPEAN AMERICAN BANK,
                                     HYPOBANK,
                                 SOCIETE GENERALE,
                                  and SUMMIT BANK,
                                    AS CO-AGENTS
                                          
                           Dated as of December 30, 1998

<PAGE>

                    AMENDMENT NO. 2 TO REVOLVING CREDIT AGREEMENT

     This AMENDMENT NO. 2 TO REVOLVING CREDIT AGREEMENT (this "AMENDMENT NO. 2")
is made as of December 30, 1998 by and among (a) Mack-Cali Realty, L.P. (the
"BORROWER"), (b) The Chase Manhattan Bank; Fleet National Bank; Bankers Trust;
The Bank of New York; Bayerische Landesbank Girozentrale; Citizens Bank of Rhode
Island; Commerzbank Aktiengesellschaft, New York Branch; Creditanstalt Corporate
Finance, Inc.; Crestar Bank; DG Bank Deutsche Genossenschaftsbank, New York
Branch; Dresdner Bank AG, New York Branch and Grand Cayman Branch; European
American Bank; Erste Bank; The First National Bank of Chicago; First Union
National Bank; Bayerische Hypotheken- und Wechsel- Bank Aktiengesellschaft, New
York Branch; Key Bank; KBC Bank N.V. (f/k/a Kredietbank, N.V.); LaSalle National
Bank; Mellon Bank, N.A.; NationsBank; PNC Bank, National Association; Societe
Generale; Summit Bank; The Tokai Bank, Limited - New York Branch; USTrust; Bank
Leumi USA and Bank One, Arizona, NA (collectively, the "LENDERS"), and (c) The
Chase Manhattan Bank, as Administrative Agent (in such capacity, the
"ADMINISTRATIVE AGENT") for the Lenders.

     WHEREAS, the Borrower, the Lenders (including PNC Bank, National
Association and NationsBank as Co-Documentation Agents) and the Administrative
Agent are parties to a Revolving Credit Agreement dated as of April 16, 1998, as
amended by Amendment No. 1 to Revolving Credit Agreement dated as of July 20,
1998 (the "CREDIT AGREEMENT"), pursuant to which the Lenders have agreed to make
loans to the Borrower on the terms and conditions set forth therein;

     WHEREAS, the Borrower is exercising its right pursuant to Section 2.2 of
the Credit Agreement, to increase the total credit limit of the Credit
Agreement, with certain of the Lenders agreeing to increase their individual
Commitments;

     NOW, THEREFORE, in consideration of the foregoing premises, and for other
good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, and fully intending to be legally bound by this Amendment No. 2,
the parties hereto agree as follows:

<PAGE>

     1.   DEFINITIONS.  Capitalized terms used herein without definition shall
have the meanings assigned to such terms in the Credit Agreement.

     2.   AMENDMENTS TO CREDIT AGREEMENT.  As of the Effective Date (as defined
in Section 4 hereof) the Credit Agreement is hereby amended as follows:

          2.1. TOTAL COMMITMENT.  The definition of TOTAL COMMITMENT in Section
     1.1 of the Credit Agreement is amended by (a) deleting the amount
     "$900,000,000" in line 2 thereof and substituting in place thereof the
     amount "$1,000,000,000" and (b) deleting the phrase ", as such amount may
     be increased pursuant to Section 2.2 hereof".

          2.2. COMMITMENT PERCENTAGES.  SCHEDULE 1.2 to the Credit Agreement is
     hereby deleted in its entirety and SCHEDULE 1.2 to this Amendment No. 2 is
     substituted in place thereof.

     3.   PROVISIONS OF GENERAL APPLICATION.

          3.1. NO OTHER CHANGES.  Except as otherwise expressly provided or
     contemplated by this Amendment No. 2, all of the terms, conditions and
     provisions of the Credit Agreement remain unaltered and in full force and
     effect.  The Credit Agreement and this Amendment No. 2 shall be read and
     construed as one agreement.  The making of the amendments in this Amendment
     No. 2 does not imply any obligation or agreement by the Administrative
     Agent or any Lender to make any other amendment, waiver, modification or
     consent as to any matter on any subsequent occasion.

          3.2. GOVERNING LAW.  This Amendment No. 2 is intended to take effect
     as a sealed instrument and shall be deemed to be a contract under the laws
     of the State of New York.  This Amendment No. 2 and the rights and
     obligations of each of the parties hereto are contracts under the laws of
     the State of New York and shall for all purposes be construed in accordance
     with and governed by the laws of such State (excluding the laws applicable
     to conflicts or choice of law).

          3.3. ASSIGNMENT.  This Amendment No. 2 shall be binding upon and inure
     to the benefit of each of the parties hereto and their respective permitted
     successors and assigns.

          3.4. COUNTERPARTS.  This Amendment No. 2 may be executed in any number
     of counterparts, but all such counterparts shall together constitute but
     one and the same agreement.  In making proof of this Amendment No. 2, it
     shall not be necessary to produce or account for more than one counterpart
     thereof signed by each of the parties hereto.

<PAGE>

     4.   EFFECTIVENESS OF THIS AMENDMENT NO. 2.  This Amendment No. 2 shall
become effective on the date on which the following conditions precedent are
satisfied (such date being hereinafter referred to as the "EFFECTIVE DATE"):

          (a)  Execution and delivery to the Administrative Agent by each
     Lender, the Borrower, and the Agents of this Amendment No. 2, and
     reaffirmation of each Guaranty by each Guarantor.

          (b)  Execution and delivery to the Administrative Agent of a
     certificate of the Borrower confirming that there have been no changes to
     its charter documents since April 16, 1998, except for Amendment No. 1 to
     Second Amended and Restated Agreement of Limited Partnership of Mack-Cali
     Realty, L.P.

          (c)  Delivery to the Administrative Agent of resolutions of the board
     of directors of the general partner of the Borrower authorizing this
     Amendment No. 2, including the increased loan amount requested.

          (d)  Execution and delivery to the Administrative Agent by the
     Borrower of Amended and Restated Revolving Credit Notes in favor of each
     Lender that is increasing its Commitment  hereunder in an amount equal to
     such Lender's new Commitment hereunder.

          (e)  Delivery to the Administrative Agent by Pryor, Cashman, Sherman &
     Flynn, as counsel to the Borrower, of an opinion addressed to the Lenders
     and the Administrative Agent in form and substance reasonably satisfactory
     to the Lenders and the Administrative Agent.

          (f)  Payment by the Borrower of any LIBOR Breakage Costs, and
     indemnification of the Administrative Agent and the Lenders as provided in
     Section 4.8 of the Credit Agreement for any LIBOR Breakage Costs, arising
     out of the increase of the Total Commitment and certain of the Commitments
     and the adjustment of the Commitment Percentages pursuant to this Amendment
     No. 2.

          (g)  Payment by the Borrower of all fees payable pursuant to the last
     sentence of the first paragraph of Section 2.2 of the Credit Agreement
     which fees are set forth in a letter agreement of even date herewith.

<PAGE>
                                         -5-


     IN WITNESS WHEREOF, the undersigned have duly executed and delivered this
Amendment No. 1 as of the date first set forth above.

                              MACK-CALI REALTY, L.P.

                              By: Mack-Cali Realty Corporation, its general
                              partner

                              By:
                                 --------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President

<PAGE>
                                         -6-


                              
                              
                              THE CHASE MANHATTAN BANK, individually and as
                              Administrative Agent
                              
                              By:
                                 --------------------------------
                                 Name:  Marc E. Costantino
                                 Title: Vice President


<PAGE>
                                         -7-


                              
                              
                              FLEET NATIONAL BANK, individually and as
                              Syndication Agent
                              
                              By:
                                 --------------------------------
                                 Name:  Mark E. Dalton
                                 Title: Senior Vice President





<PAGE>
                                         -8-

                              
                              
                              BANKERS TRUST
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 





<PAGE>
                                         -9-


                              THE BANK OF NEW YORK
                              
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 





<PAGE>
                                         -10-


                         BAYERISCHE LANDESBANK GIROZENTRALE
                              
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 
     
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 


<PAGE>
                                         -11-


                              
                              
                              CITIZENS BANK OF RHODE ISLAND
                              
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 



<PAGE>
                                         -12-


                              
                              
                              COMMERZBANK AKTIENGESELLSCHAFT, NEW YORK BRANCH
                              
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 
     
     
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 



<PAGE>
                                         -13-



                              
                              
                              CREDITANSTALT CORPORATE FINANCE, INC.
                              
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 
     
     
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 



<PAGE>
                                         -14-


                              
                              
                              CRESTAR BANK
                              
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 




<PAGE>
                                         -15-
                              
                              
                              DG BANK DEUTSCHE GENOSSENSCHAFTSBANK,
                              NEW YORK BRANCH
                              
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 




<PAGE>
                                         -16-

                              
                              DRESDNER BANK AG, NEW YORK BRANCH
                              AND GRAND CAYMAN BRANCH
                              
                              
                              By:
                                 --------------------------------
                                 Name:
                                 Title: 
     
     
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 




<PAGE>
                                         -17-
                              
                              
                              EUROPEAN AMERICAN BANK
                              
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 




<PAGE>
                                         -18-


                              ERSTE BANK
                              
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 




<PAGE>
                                         -19-

                              
                              THE FIRST NATIONAL BANK OF CHICAGO
                              
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 




<PAGE>
                                         -20-


                              FIRST UNION NATIONAL BANK
                              

                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 




<PAGE>
                                         -21-

                              BAYERISCHE HYPOTHEKEN- UND WECHSEL- BANK
                              AKTIENGESELLSCHAFT, NEW YORK BRANCH
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 
                              
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 




<PAGE>
                                         -22-


                              KEY BANK
                              
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 




<PAGE>
                                         -23-


                              KREDIETBANK, N.V.
                              
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 




<PAGE>
                                         -24-


                              MELLON BANK, N.A.
                              
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 




<PAGE>
                                         -25-

                              NATIONSBANK
                              
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 




<PAGE>
                                         -26-

                              PNC BANK, NATIONAL ASSOCIATION
                              
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 




<PAGE>
                                         -27-


                              SOCIETE GENERALE
                              
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 




<PAGE>
                                         -28-


                              SUMMIT BANK
                              
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 




<PAGE>
                                         -29-


                              THE TOKAI BANK, LIMITED
                              NEW YORK BRANCH
                              
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 




<PAGE>
                                         -30-
                              

                              US TRUST
                              
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 




<PAGE>
                                         -31-


                              LASALLE NATIONAL BANK

                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 




<PAGE>
                                         -32-


                              BANK LEUMI USA
                              
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 




<PAGE>
                                         -33-


                              BANK ONE, ARIZONA, NA
                              
                              
                              By:
                                 --------------------------------
                                 Name:  
                                 Title: 




<PAGE>
                                         -34-


Each of the undersigned Guarantors hereby acknowledges the foregoing Amendment
No. 1 and reaffirms its guaranty of the Obligations (as defined in the Guaranty
executed and delivered by such Guarantor) under the Credit Agreement and the
other Loan Documents, each as amended hereby or in connection herewith, in
accordance with the Guaranty executed and delivered by such Guarantor.

                              MACK-CALI REALTY CORPORATION
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer


                              11 COMMERCE DRIVE ASSOCIATES
                              
                              By: Mack-Cali Sub II, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              By: Cali Property Holdings VI, L.P., its general
                              partner
                              
                              By: Mack-Cali Sub II, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer


<PAGE>
                                         -35-

                              SIX COMMERCE DRIVE ASSOCIATES
                              
                              By: Mack-Cali Sub I, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              By: Cali Property Holdings III, L.P., its general
                              partner
                              
                              By: Mack-Cali Sub I, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              20 COMMERCE DRIVE ASSOCIATES
                              
                              By: Mack-Cali Sub IV, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              By: Cali Property Holdings IX, L.P., its general
                              partner
                              
                              By: Mack-Cali Sub IV, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer

<PAGE>
                                         -36-


                              CENTURY PLAZA ASSOCIATES
                              
                              By: Mack-Cali Sub IV, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              By: Cali Property Holdings II, L.P., its general
                              partner
                              
                              By: Mack-Cali Sub IV, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              C.W. ASSOCIATES
                              
                              By: Mack-Cali Sub II, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              By: Cali Property Holdings VII, L.P., its general
                              partner
                              
                              By: Mack-Cali Sub II, Inc., its general partner
                              

<PAGE>
                                         -37-


                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              

                              D.B.C. ASSOCIATES
                              
                              By: Mack-Cali Sub II, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              By: Cali Property Holdings VIII, L.P., its general
                              partner
                              
                              By: Mack-Cali Sub II, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              CALI BUILDING V ASSOCIATES
                              
                              By: Mack-Cali Sub I, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer

<PAGE>
                                         -38-


                              
                              
                              By: Cali Property Holdings I, L.P., its general
                              partner
                              
                              By: Mack-Cali Sub I, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              500 COLUMBIA TURNPIKE ASSOCIATES
                              
                              By: Mack-Cali Sub I, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              By: Cali Property Holdings V, L.P., its general
                              partner
                              
                              By: Mack-Cali Sub I, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              CHESTNUT RIDGE ASSOCIATES
                              
                              By: Mack-Cali Sub III, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer

<PAGE>
                                         -39-


                              
                              By: Cali Property Holdings X, L.P., its general
                              partner
                              
                              By: Mack-Cali Sub III, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              ROSELAND II LIMITED PARTNERSHIP
                              
                              By: Mack-Cali Sub III, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              OFFICE ASSOCIATES, LTD.
                              
                              By: Mack-Cali Sub III, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              GROVE STREET ASSOCIATES OF JERSEY CITY
                              LIMITED PARTNERSHIP

<PAGE>
                                         -40-


                              By: Mack-Cali Sub IV, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              



<PAGE>
                                         -41-



                              TENBY CHASE APARTMENTS
                              
                              By: Mack-Cali Sub IV, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              By: Cali Property Holdings IV, L.P., its general
                              partner
                              
                              By: Mack-Cali Sub IV, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              600 PARSIPPANY ASSOCIATES, L.P.
                              
                              By: Mack-Cali Sub V, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              400 RELLA REALTY ASSOCIATES, L.P.
                              
                              By: Mack-Cali Sub VI, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer

<PAGE>
                                         -42-

                              
                              VAUGHN PRINCETON ASSOCIATES L.P.
                              
                              By: Mack-Cali Sub V, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              MONMOUTH/ATLANTIC REALTY ASSOCIATES L.P.
                              
                              By: Mack-Cali Sub VII, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              JUMPING BROOK REALTY ASSOCIATES L.P.
                              
                              By: Mack-Cali Sub VII, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer

<PAGE>
                                         -43-

                              
                              HORIZON CENTER REALTY ASSOCIATES L.P.
                              
                              By: Mack-Cali Sub VII, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              COMMERCENTER REALTY ASSOCIATES L.P.
                              
                              By: Mack-Cali Sub VII, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              400 PRINCETON ASSOCIATES L.P.
                              
                              By: Mack-Cali Sub V, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
<PAGE>
                                         -44-


                              CAL-TREE REALTY ASSOCIATES L.P.
                              
                              By: Mack-Cali Sub VIII, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              MOUNT AIRY REALTY ASSOCIATES L.P.
                              
                              By: Mack-Cali Sub IX, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              FIVE SENTRY REALTY ASSOCIATES L.P.
                              
                              By: Mack-Cali Sub VIII, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              300 TICE REALTY ASSOCIATES L.P.
                              
                              By: Mack-Cali Sub IX, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer

<PAGE>
                                         -45-


                              
                              BRIDGE PLAZA REALTY ASSOCIATES L.P.
                              
                              By: Mack-Cali Sub IX, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              CALI AIRPORT REALTY ASSOCIATES, L.P.
                              
                              By: Mack-Cali Sub VIII, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              CROSS WESTCHESTER REALTY ASSOCIATES L.P.
                              
                              By: Mack-Cali Sub VI, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
<PAGE>
                                         -46-


                              MID-WESTCHESTER REALTY ASSOCIATES L.P.
                              
                              By: Mack-Cali Sub VI, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              SO. WESTCHESTER REALTY ASSOCIATES L.P.
                              
                              By: Mack-Cali Sub VI, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              WHITE PLAINS REALTY ASSOCIATES L.P.
                              
                              By: Mack-Cali Sub XIV, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer


<PAGE>
                                         -47-


                              MARTINE AVENUE REALTY ASSOCIATES L.P.
                              
                              By: Mack-Cali Sub XIII, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              CALI STAMFORD REALTY ASSOCIATES L.P. D/B/A RM
                              STAMFORD REALTY ASSOCIATES
                              
                              By: Mack-Cali Sub XII, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              CALI PENNSYLVANIA REALTY ASSOCIATES, L.P.
                              
                              By: Mack-Cali Sub XV, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
<PAGE>
                                         -48-


                              SHELTON REALTY ASSOCIATES LIMITED PARTNERSHIP
                              
                              By: Mack-Cali Sub XII, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              MOORESTOWN REALTY ASSOCIATES L.P.
                              
                              By: Mack-Cali Sub XVI, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              MACK-CALI PROPERTIES CO. #3
                              
                              By: Mack-Cali Sub II, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer

<PAGE>
                                         -49-


                              MACK-CALI METROPOLITAN, LTD L.P.
                              
                              By: Mack-Cali Sub XX, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              MACK PROPERTIES CO.
                              
                              By: Mack-Cali Sub III, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              MACK-CALI NORTH HILLS L.P.
                              
                              By: Mack-Cali Sub XIV, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              120 PASSAIC STREET LLC
                              
                              By: Mack-Cali Sub IX, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer

<PAGE>

                                         -50-


                              MACK-CALI TEXAS PROPERTY, L.P.
                              
                              By: Mack-Cali Sub XVII, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              

                              BRANDEIS BUILDING INVESTORS, L.P.
                              
                              By: Mack-Cali Sub XIX, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              

                              MACK-CALI CENTURY III INVESTORS, L.P.
                              
                              By: Mack-Cali Sub XVIII, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              

<PAGE>
                                         -51-


                              PHELAN REALTY ASSOCIATES L.P.
                              
                              By: Mack-Cali Sub XXI, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              PRINCETON CORPORATE CENTER REALTY ASSOCIATES L.P.
                              
                              By: Mack-Cali Sub XVI, Inc., its general partner
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer
                              
                              
                              MACK-CALI PROPERTY TRUST
                              
                              
                              By:
                                 -------------------------------
                                 Name:  Barry Lefkowitz
                                 Title: Vice President and Chief Financial
                                        Officer

<PAGE>

                                     Schedule 1.2


LENDER                                COMMITMENT AMOUNT    COMMITMENT PERCENTAGE

The Chase Manhattan Bank                 $73,750,000               7.375%
270 Park Avenue
New York, NY  10017

Fleet National Bank                      $73,750,000               7.375%
111 Westminster Street
Providence, RI  02903

NationsBank                              $73,750,000               7.375%
8300 Greensboro Drive
McLean, VA  22102

PNC Bank, National Association           $73,750,000               7.375%
Two Tower Center Blvd.
East Brunswick, NJ  08816

First Union National Bank                $65,000,000               6.5%
One First Union Center
Charlotte, NC  28288-0166

Bankers Trust Company                    $50,000,000               5.0%
One Bankers Trust Plaza
New York, NY  10006

Commerzbank AG, New York Branch          $50,000,000               5.0%
2 World Financial Center
New York, NY  10281-1050

The First National Bank of Chicago       $50,000,000               5.0%
One First National Plaza
Suite 0151, 1-14
Chicago, IL  60670

Dresdner Bank AG, New York               $45,000,000               4.5%
Branch and Grand Cayman Branch
75 Wall Street
New York, NY  10005

Bank Austria Creditanstalt               $35,000,000               3.5%
Corporate Finance, Inc.
2 Ravinia Drive
Atlanta, GA  30346

<PAGE>

Bayerische Hypo-und Vereinsbank AG       $35,000,000               3.5%
New York Branch
32 Old Slip, Financial Square
New York, NY  10005

Societe Generale                         $35,000,000               3.5%
2001 Ross Avenue
Dallas, TX  75201

Summit Bank                              $35,000,000               3.5%
750 Walnut Avenue
Cranford, NJ  07016

KBC Bank N.V.                            $30,000,000               3.0%
(f/k/a Kredietbank, N.V.)
125 West 55th Street
New York, NY  10019

Key Bank National Association            $25,000,000               2.5%
127 Public Square
Cleveland, OH  44114-1306

Mellon Bank, N.A.                        $25,000,000               2.5%
1735 Market Street
Philadelphia, PA  19103

US Trust                                 $25,000,000               2.5%
40 Court Street
Boston, MA  02108

Bank of New York                         $20,000,000               2.0%
One Wall Street
New York, NY  10015


Citizens Bank of Rhode Island            $20,000,000               2.0%
1 Citizens Plaza
Providence, RI  02903-1339

Crestar Bank                             $20,000,000               2.0%
8245 Boone Blvd.
Vienna, VA  

DG Bank Deutsche                         $20,000,000               2.0%
Genossenschaftsbank AG,
New York Branch
609 Fifth Avenue
New York, NY  10017-1021

The Tokai Bank Limited                   $20,000,000               2.0%
Park Avenue Plaza
55 East 52nd Street
New York, NY  10055

<PAGE>


Bank One, Arizona, NA                    $20,000,000               2.0%
241 North Cental Avenue
Phoenix, AZ  85004

Bayerische Landesbank                    $20,000,000               2.0%
Girozentrale
580 Lexington Avenue
New York, NY  10022

European American Bank                   $17,500,000               1.75%
335 Madison Avenue
New York, NY  10017

LaSalle National Bank                    $17,500,000               1.75%
135 South LaSalle Street
Chicago, IL  60603

Erste Bank                               $15,000,000               1.5%
280 Park Avenue, West Building
New York, NY  10017

Bank Leumi USA                           $10,000,000               1.0%
565 Fifth Avenue
New York, NY  10036
                                      --------------            -------

TOTAL                                 $1,000,000,000               100%