CORPORATE OFFICE PROPERTIES TRUST
8-K, 1998-11-16
REAL ESTATE INVESTMENT TRUSTS
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<PAGE>


                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

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

                                    FORM 8-K

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

                                 CURRENT REPORT

                       Pursuant to Section 13 or 15(d) of
                       the Securities Exchange Act of 1934


       Date of Report (Date of earliest event reported): October 30, 1998
                                                         -----------------

                        CORPORATE OFFICE PROPERTIES TRUST
              ----------------------------------------------------
             (Exact name of registrant as specified in its charter)


         Maryland                      0-20047                 23-2947217
- -------------------------------      ------------       ----------------------  
(State or other jurisdiction of      (Commission             (IRS Employer
       incorporation)                File Number)       Identification Number)


                           401 City Avenue, Suite 615
                              Bala Cynwyd, PA 19004
                     --------------------------------------
                    (Address of principal executive offices)


                                 (610) 538-1800
               --------------------------------------------------
              (Registrant's telephone number, including area code)


<PAGE>


Item 2.  Acquisition or Disposition of Assets.

On October 30, 1998, Corporate Office Properties Trust (the "Company") through
its affiliate Corporate Office Properties, L.P. (the "Operating Partnership"),
acquired six office buildings and two office/flex buildings (the "Centerpoint
Properties") located in Middlesex County, New Jersey.

The purchase price of the Centerpoint Properties totaled approximately $31.7
million, including approximately $400,000 in transaction costs. The purchase
price was determined through arms-length negotiation with the sellers, South
Middlesex Industrial Park Associates, L.P. and SM Monroe Associates. The Company
paid $31.0 million of the purchase price and transaction costs using borrowings
under its existing senior revolving credit facility with Bankers Trust Company
and the balance using the Company's cash reserves.

The Centerpoint Properties, located at Exit 8A of the New Jersey Turnpike,
adjacent to Princeton, New Jersey, total approximately 270,000 square feet.
Major tenants as of October 31, 1998, include the Associated Press and Somfy
Systems, under leases aggregating approximately 65,000 and 41,000 square feet,
respectively, representing approximately 24% and 15%, respectively, of the
Centerpoint Properties' aggregate square feet.

The following table sets forth certain historical information relating to each
of the Centerpoint Properties as of October 31, 1998:


                                       2

<PAGE>


                             CENTERPOINT PROPERTIES


<TABLE>
<CAPTION>

                                                                        Percentage of   Total Rental
                                             Percentage                 Total Rental     Revenue per
                                           Occupied as of  Total Rental  Revenue of       Occupied
                      Year Built/ Rentable  Oct. 31, 1998     Revenue   Occupied Sq. Ft.    Sq. Ft.   Major Tenants (10% or more of
Property Locations    Renovated   Sq. Ft.        (1)            (2)           (3)             (4)        Rentable Square Feet)
- ------------------    ----------- -------- --------------  ------------ ---------------- -----------  -----------------------------

<S>                     <C>       <C>          <C>          <C>              <C>            <C>       <C>  

101 Interchange Plaza   1985      43,886       100.00%      $ 750,608        15.48%         $17.10    Ford Motor Credit Co. (33%) 
                                                                                                      Middlesex County Improvement
                                                                                                        (13%)
                                                                                                      Trans Union Corp. (11%)
                                                                                                      CSX Transportation, Inc. (10%)

104 Interchange Plaza   1990      47,142       100.00%      1,032,215        21.28%          21.90    South Middlesex Industrial
                                                                                                        Park Assoc. (24%)
                                                                                                      Utica Mutual Insurance
                                                                                                        Company (15%)
                                                                                                      Lanier Worldwide, Inc. (12%)
                                                                                                      Somerset RE Management (10%)

19 Commerce Drive       1989      65,277       100.00%      1,251,780        25.81%          19.18    The Associated Press (100%)

47 Commerce Drive    1992/1998    40,686       100.00%        395,112         8.15%           9.71    Somfy Systems (100%)

2 Centre Drive          1989      16,132       100.00%        448,676         9.25%          27.81    Summit Bank (100%)

3 Centre Drive          1987      20,436       100.00%        312,382         6.44%          15.29    Matrix Development Group
                                                                                                        (100%)

7 Centre Drive          1989      19,466       100.00%        310,921         6.41%          15.97    Paradise Software (17%)
                                                                                                      Systems Freight, Inc. (14%)
                                                                                                      Compugen, Inc. (12%)

8 Centre Drive          1986      16,199       100.00%        348,249         7.18%          21.50    AON Risk Services, Inc. (100%)
                                 -------                    ---------       ------

                                 269,224       100.00%     $4,849,943       100.00%         $18.01
                                 -------                   ----------       ------
                                 -------                   ----------       ------

</TABLE>


- ---------------
(1)  The percentage is based on all leases in effect as of October 31, 1998.

(2)  Total Rental Revenue is the monthly contractual base rent as of October 31,
     1998, multiplied by 12 plus the estimated annualized expense reimbursements
     under existing leases.

(3)  This percentage is based on the property's rental revenue to Centerpoint
     Properties' Total Rental Revenue.

(4)  This represents the property's total rental revenue divided by the
     respective property's leased square feet as of October 31, 1998.


                                       3

<PAGE>


The following schedule sets forth lease expirations for the Centerpoint
Properties for the period November 1, 1998 to December 31, 1998, and annually
thereafter, assuming that none of the tenants exercise renewal options:


                             CENTERPOINT PROPERTIES
                          SCHEDULE OF LEASE EXPIRATIONS


<TABLE>
<CAPTION>


                                                                         Total Rental                             Total Rental
                                                                          Revenue of                               Revenue of
                                    Square Footage                      Expiring Leases  Percentage of Total     Expiring Leases
                       Number of      of Leases    Percentage of Total   Per Rentable      Rental Revenue         Per Rentable
Year of Expiration  Leases Expiring   Expiring      Leased Square Feet  Square Foot (1)       Expiring (1)       Square Foot (1)
- ------------------- --------------- -------------- -------------------  ---------------- -------------------  --------------------

<S>                  <C>            <C>            <C>                  <C>              <C>                   <C>

November 1, -
December 31, 1998         3            9,117             3.38%           $   134,176             2.77%               $ 14.72
             1999         9           60,007            22.29%             1,251,970            25.81%                 20.86
             2000         5           44,000            16.34%               806,950            16.64%                 18.34
             2001         7           17,936             6.67%               403,963             8.33%                 22.52
             2002         4           78,977            29.34%             1,515,005            31.23%                 19.18
             2003         5           18,501             6.87%               342,767             7.07%                 18.53
             2004        --               --             0.00%                    --             0.00%                    --
             2005        --               --             0.00%                    --             0.00%                    --
             2006        --               --             0.00%                    --             0.00%                    --
             2007        --               --             0.00%                    --             0.00%                    --
             2008         1           40,686            15.11%               395,112             8.15%                  9.71
2009 & Thereafter        --               --             0.00%                    --             0.00%                    --
                        ---          -------           ------            -----------           ------
                         34          269,224           100.00%           $ 4,849,943           100.00%               $ 18.01
                        ---          -------           ------            -----------           ------
                        ---          -------           ------            -----------           ------

</TABLE>

- ---------------
(1)  Total Rental Revenue is the monthly contractual base rent as of October 31,
     1998 multiplied by 12, plus the estimated annualized expense reimbursements
     under existing leases.


Item 7.  Financial Statements, Pro Forma Financial Information and Exhibits

         (a)  Financial Statements of Businesses Acquired

              The combined financial statements of the Centerpoint Properties
              will be filed by amendment.

         (b)  Pro Forma Financial Information

              The pro forma condensed consolidated financial statements of the
              Company will be filed by amendment.


                                       4


<PAGE>


         (c)  Exhibits

<TABLE>
<CAPTION>

Exhibit Number     Description
- --------------     -----------

<S>                <C>

2.31.1             Sale-Purchase Agreement, dated August 20, 1998 between South
                   Middlesex Industrial Park Associates, L.P. and SM Monroe
                   Associates and COPT Acquisitions, Inc.

2.31.2             First Amendment to Sale-Purchase Agreement, dated October 30,
                   1998, between South Middlesex Industrial Park Associates, L.P.
                   and SM Monroe Associates, L.P. and COPT Acquisitions, Inc.

</TABLE>


                                   SIGNATURES

                  Pursuant to the requirements of the Securities Exchange Act of
1934, the Company has duly caused this Report to be signed on its behalf by the
undersigned hereunto duly authorized.

Dated:  November 16, 1998


                        CORPORATE OFFICE PROPERTIES TRUST


                        By: /s/ Clay W. Hamlin, III
                            -------------------------------
                            Name: Clay W. Hamlin, III
                            Title: Chief Executive Officer


                        By: /s/ Randall M. Griffin
                            -------------------------------
                            Name: Randall M. Griffin
                            Title: President and Chief Operating Officer


                                       5


<PAGE>


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


                             SALE-PURCHASE AGREEMENT


                                     between


                SOUTH MIDDLESEX INDUSTRIAL PARK ASSOCIATES, L.P.
                         AND SM MONROE ASSOCIATES, L.P.
                              Collectively, Seller


                                       and


                            COPT ACQUISITIONS, INC.,
                                    Purchaser


                           Dated as of August 20, 1998


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


<PAGE>


                                TABLE OF CONTENTS


<TABLE>
<CAPTION>

                                                                            Page

<S>   <C>                                                                      <C>

1.    Sale of Premises ........................................................2

2.    Purchase Price ..........................................................4

3.    Apportionments ..........................................................6

4.    Due Diligence Period and Closing Date ..................................15

5.    Permitted Encumbrances .................................................18

6.    Title ..................................................................18

7.    Violations .............................................................24

8.    Representations and Warranties .........................................27

9.    Transfer Taxes .........................................................35

10.   Conditions Precedent to Closing ........................................36

11.   Documents to be Delivered by Seller at Closing .........................39

12.   Documents to be Delivered by Purchaser at Closing ......................44

13.   Operation of the Premises prior to the Closing Date ....................46

14.   As Is ..................................................................53

15.   Broker .................................................................58

16.   Casualty; Condemnation .................................................59

17.   Remedies ...............................................................62

18.   Purchaser's Access to the Premises .....................................63

19.   [Intentionally Deleted] ................................................67

20.   [Intentionally Deleted] ................................................67

21.   Assignment .............................................................67

22.   Access to Records ......................................................67

23.   Notices ................................................................69

24.   Property Information and Confidentiality ...............................71

</TABLE>


                                       -i-

<PAGE>


<TABLE>
<CAPTION>

<S>   <C>                                                                     <C>

25.   Miscellaneous ..........................................................74

26.   ISRA ...................................................................79

27.   Easements, Rights of Way, Etc. .........................................80

</TABLE>


                                      -ii-


<PAGE>


                                LIST OF SCHEDULES


<TABLE>
<CAPTION>

Schedules

<S>      <C>

1        Description of the Land

2        Certain Included Property

2A       Excluded Property

3        Permitted Encumbrances

4        Leases

5        Rent Roll

6        Pending Actions

7        Intangible Property

8        Insurance Policies

9        Pending Construction Matters

</TABLE>


                                LIST OF EXHIBITS


<TABLE>
<CAPTION>

Exhibits

<S>      <C>

A        Deed

B        Assignment and Assumption of Leases and Security
         Deposits

C        Assignment and Assumption of Licenses and
         Acceptable Agreements

D        Assignment and Assumption of Intangible Property

E        Bill of Sale

F        Notice to Tenants

G        Tenant Estoppel Certificate

H        Non-Foreign Affidavit Under Internal Revenue Code
         Section 1445(b)(2)

I        Escrow Agent Joinder


</TABLE>


                                      -iii-


<PAGE>


     SALE-PURCHASE AGREEMENT (this "Agreement"), dated as of the 20th day of 
August, 1998, by and between South Middlesex Industrial Park Associates, L.P.,
a New Jersey limited partnership ("SMIPA")and SM Monroe Associates, L.P.,
a New Jersey limited partnership ("SMMA"), both having an office at
c/o The Taylor Simpson Group, One Rockefeller Plaza, New York, New York 10020 
(SMIPA and SMMA are, collectively, "Seller"), and COPT ACQUISITIONS, INC., a 
Delaware corporation, having an office at c/o Corporate Office Properties 
Trust, One Logan Square, Suite 1105, Philadelphia, Pennsylvania 19103 
("Purchaser").

                               W I T N E S S E T H

     WHEREAS, Seller is the owner of the Premises (as defined in Section 
1(a)) known as 1 South Middlesex Avenue, 21 Commerce Drive and 40 Commerce 
Drive (collectively, the "Warehouse Properties"), 19 Commerce Drive and 47 
Commerce Drive (collectively, the "Flex Properties") and 2 Centre Drive, 3 
Centre Drive, 7 Centre Drive, 8 Centre Drive, 101 Interchange Plaza and 104 
Interchange Plaza (collectively, the "Office Properties"; the Warehouse 
Properties, the Flex Properties and the Office Properties are each 
"Individual Properties") which properties are collectively known as 
CenterPoint at 8A located in Middlesex County, New Jersey;

     WHEREAS, Purchaser has executed and delivered to Seller a letter of 
intent (the "Letter of Intent") to

<PAGE>

purchase the Premises as provided in that certain Confidential Offering
Memorandum prepared by Secured Capital Corp. in connection with the offering of
the Premises for sale by Seller (the "Confidential Offering Memorandum");

     WHEREAS, subject to the terms of the Confidential Offering Memorandum, 
Purchaser has been selected as the prospective purchaser of the Premises; and 

     WHEREAS, Seller and Purchaser now desire to enter into an 
agreement whereby, subject to the terms and conditions contained herein, 
Seller shall sell the Premises to Purchaser and Purchaser shall purchase the 
Premises from Seller.

     NOW, THEREFORE, in consideration of ten ($10.00) dollars and the mutual 
covenants and agreements hereinafter set forth, and intending to be legally 
bound hereby, it is hereby agreed as follows:

     1. Sale of Premises

     (a) Seller agrees to sell and convey to Purchaser, and Purchaser agrees 
to purchase from Seller, at the price and upon the terms and conditions set 
forth in this Agreement, all those certain plots, pieces and parcels of land 
located in the Townships of South Brunswick and Monroe, County of Middlesex 
and State of New Jersey, as more particularly described in Schedule "1" 
annexed hereto and made a part hereof (the "Land"), together with (i) all 
buildings and other improvements situated on the Land


                                      - 2 -

<PAGE>

(collectively, the "Buildings"), (ii) all easements, rights of way,
reservations, privileges, appurtenances, and other estates and rights of Seller
pertaining to the Land and the Buildings, (iii) all right, title and interest of
Seller in and to all fixtures, machinery, equipment, supplies and other articles
of personal property attached or appurtenant to the Land or the Buildings, or
used in connection therewith including, without limitation, the items of
personal property described in Schedule "2" annexed hereto and made a part
hereof (collectively, the "Personal Property"), (iv) all oil, gas and mineral
rights of Seller, if any, in and to the Land, (v) all right, title and interest
of Seller, if any, in and to the trade names of the Buildings, and (vi) all
right, title and interest of Seller, if any, in and to all strips and gores, all
alleys adjoining the Land, and the land lying in the bed of any street, road or
avenue, opened or proposed, in front of or adjoining the Land to the center line
thereof, and all right, title and interest of Seller, if any, in and to any
award made or to be made in lieu thereof and in and to any unpaid award for any
taking by condemnation or any damages to the Land or the Buildings by reason of
a change of grade of any street, road or avenue (the Land, together with all of
the foregoing items listed in clauses (i)-(vi) above being hereinafter sometimes
collectively referred to as the "Premises").

     (b) Specifically excluded from the Premises and this sale are all items 
of personal property not described in


                                      - 3 -

<PAGE>

Section 1(a) and the items described in Schedule "2A" annexed hereto and made a
part hereof.

     (c) Seller and Purchaser agree that, for purposes of execution and 
delivery of this Agreement, Schedule "1" includes only a list of the street 
addresses of the buildings comprising the Premises and not metes and bounds 
descriptions of the Land on which such buildings are situated. Such street 
addresses correspond to the eleven Individual Properties as described in the 
Confidential Offering Memorandum. It is the intention of the parties that the 
Deed (as defined in Section 11(a)) shall include metes and bounds 
descriptions of the Land, which descriptions the parties intend to have read 
from new or updated surveys of the Land. Notwithstanding the foregoing, in no 
event shall Seller be obligated to convey any land or other property (real or 
personal) to which it does not as of the date hereof own an undivided fee 
title interest.

     2. Purchase Price

     The purchase price to be paid by Purchaser to Seller for the Premises 
(the "Purchase Price") is FORTY SEVEN MILLION EIGHT HUNDRED THOUSAND AND 
00/100 ($47,800,000.00) DOLLARS payable as follows:

     (a) ONE MILLION AND 00/100 ($1,000,000) DOLLARS (the "Downpayment"), 
within two (2) business days after the execution and delivery of this 
Agreement by and between Seller and Purchaser, by delivery to the Title 
Company (as


                                      - 4 -

<PAGE>

defined in Section 6(a)(i) below)(the Title Company, in its capacity as escrow
agent hereunder, is hereinafter referred to as the "Escrow Agent"), by a bank
wire transfer, intrabank transfer, or other electronic transfer of immediately
available funds to an account designated by Escrow Agent. Purchaser shall cause
Escrow Agent to send Seller written notice via telecopier confirming receipt of
the Downpayment. If the Downpayment is not paid by Purchaser to the Escrow Agent
and such notice is not received by Seller within two (2) business days after the
execution and delivery of this Agreement, Seller may terminate this Agreement
effective upon the sending of notice to Purchaser by telecopier (notwithstanding
the notice provisions of Section 23) or as otherwise provided in Section 23,
whereupon (if Purchaser shall have delivered the Downpayment to Escrow Agent)
the Downpayment shall be returned to Purchaser. The Downpayment (which term, for
purposes hereof, includes all interest accrued thereon, if any) shall be held by
Escrow Agent in accordance with the terms of the Escrow Joinder among Seller,
Purchaser and Escrow Agent, a copy of which is annexed hereto as Exhibit "I", in
an interest bearing account or money market fund in Jefferson Bank,
Philadelphia, Pennsylvania in which the principal balance does not fluctuate in
value, it being expressly understood that Purchaser shall be solely responsible
to replace promptly any portion of such principal which is reduced due to
investment loss or otherwise (which obligation shall survive termination of this
Agreement). If


                                      - 5 -
<PAGE>

the Closing (as defined in Section 4(b)) shall occur, Seller shall be entitled
to receive the Downpayment and all interest accrued thereon, if any, and such
interest shall be credited against the portion of the Purchase Price payable
pursuant to Section 2(b); and

     (b) The balance of the Purchase Price at the Closing by delivery to 
Seller of a good, unendorsed certified or official bank check, subject to 
collection, payable to the order of Seller or to such other party or parties 
as may be designated by Seller, and drawn on a Clearing House Bank, or at 
Seller's election, by bank wire transfer of immediately available funds to 
Seller's account or to the account or accounts of such other party or parties 
as may be designated by Seller in writing to Purchaser at least two (2) 
business days before the Closing Date (as defined in Section 4(b)).

     3. Apportionments

     (a) The following shall be apportioned between Seller and Purchaser at 
the Closing as of 11:59 p.m. of the day preceding the Closing Date:

          (i) prepaid rents and Additional Rents (as defined in 
Section 3(c)(ii)) and other amounts payable by tenants, if, as and when 
received;

          (ii) real estate taxes, water charges, and sewer rents on the basis 
of the fiscal years, respectively, for which same have been assessed (net of 
any interest, penalties or late charges with respect thereto, which shall


                                      - 6 -

<PAGE>

be borne by Seller);

          (iii) fees for licenses which are transferred to Purchaser at the 
Closing and annual permit and inspection fees;

          (iv) utilities, including, without limitation, telephone, steam, 
water, electricity, gas, fire main on the basis of the most recently issued 
bills therefor, subject to adjustment after the Closing when the next bills 
are available, or if current meter readings are available, on the basis of 
such readings;

          (v) Seller's share, if any, of all revenues from the operation of 
the Premises other than rents and Additional Rents (including, without 
limitation, parking charges, and telephone booth and vending machine 
revenues), if, as and when received;

          (vi) payments on account of office park maintenance for which 
tenants are not obligated to pay pursuant to their Leases (as defined herein);

          (vii) such other items as are customarily apportioned between 
sellers and purchasers of real properties of a type similar to the Premises 
in the County of Middlesex, and State of New Jersey.

     (b) If the Closing shall occur before a new real estate tax rate is 
fixed, the apportionment of taxes at the Closing shall be upon the basis of 
the old tax rate for the preceding fiscal year applied to latest assessed 
valuation. Promptly after the new tax rate is fixed, the apportionment


                                      - 7 -

<PAGE>

of taxes shall be recomputed and any discrepancy resulting from such
recomputation and any errors or omissions in computing apportionments at Closing
shall be promptly corrected and the proper party reimbursed, which obligations
shall survive the Closing in accordance with Section 3(f).

     (c) (i) If on the Closing Date any tenant is in arrears in the payment 
of rent or has not paid the rent payable by it for the month in which the 
Closing occurs (whether or not it is in arrears for such month on the Closing 
Date), any rents received by Purchaser or Seller from such tenant after the 
Closing shall be applied to amounts due and payable by such tenant during the 
following periods in the following order of priority: (A) first, to the month 
in which the Closing occurred,(B) second, to the month following the month in 
which the Closing occurred, (C) third, to the month preceding the month in 
which the Closing occurred, (D) fourth, to the second month following the 
month in which the Closing occurred, (E) fifth, to the second month preceding 
the month in which the Closing occurred and (F) thereafter, continuing to be 
applied in an alternating manner to individual months following and then 
preceding the month in which the Closing occurred which are progressively 
more distant from such month than the months described in the foregoing 
clauses (B) through (E), provided however, while the Seller is still owed any 
rents attributable to periods prior to the Closing, no payment of rent under 
this subsection (c)(i) shall result in prepayment of rent to


                                      - 8 -
<PAGE>

Purchaser. If rents or any portion thereof received by Seller or Purchaser after
the Closing are due and payable to the other party by reason of this allocation,
the appropriate sum, less a proportionate share of any reasonable attorneys'
fees and costs and expenses expended in connection with the collection thereof,
shall be promptly paid to the other party.

          (ii) If any tenants are required to pay percentage rent, escalation 
charges for real estate taxes, parking charges, office park maintenance 
charges, operating expenses and maintenance escalation rents or charges, 
cost-of-living increases or other charges of a similar nature ("Additional 
Rents") and to the extent any such Additional Rents are collected by 
Purchaser from a tenant after the Closing Date, then (A) on or before January 
7, 1999, Purchaser shall pay to Seller out of such amounts of Additional 
Rents which are due and payable by such tenants with respect to any period 
prior to the Closing Date and (B) on or before May 15, 1999, Purchaser shall 
perform a final reconciliation and pay to Seller all other Additional Rents 
so collected by Purchaser which are due and payable by such tenants with 
respect to any period prior to the Closing Date, in each case less a 
proportionate share of any reasonable attorneys' fees and costs and expenses 
of collection thereof. Purchaser shall deliver to Seller, together with each 
such payment, a reasonably satisfactory detailed accounting of such 
Additional Rents. Seller and Purchaser shall permit each


                                      - 9 -

<PAGE>

other, upon reasonable notice and during the other party's normal business 
hours, to examine and copy such operating books and records of the other 
party relating to the Premises as are necessary to confirm the amount of the 
foregoing payments and the respective accountings pertaining thereto.

          (iii) Purchaser shall endeavor in good faith to collect from 
tenants all arrearages in rent and Additional Rent in respect of periods 
prior to the Closing Date, which obligation shall include, without 
limitation, the sending of bills, late payment notices and, no later than 
March 31, 1999, bills to each tenant for the amounts owed by such tenant in 
connection with the "true-up" or reconciliation of all Additional Rents 
payable in respect of 1998.

          (iv) The provisions of this Section 3(c) shall survive the Closing.

     (d) (i) After the Closing, but subject to this subsection (d), Seller 
shall continue to have the right, in its own name, to demand payment of and 
to collect rent and Additional Rent arrearages owed to Seller by any tenant 
(which right shall include, without limitation, the right to continue or 
commence legal actions or proceedings against any tenant), it being agreed 
that delivery of the Lease Assignment (as defined in Section 11(b)) shall not 
constitute a waiver by Seller of such right. Purchaser agrees to cooperate 
with Seller in connection with all efforts by Seller to collect such rents 
and Additional Rents and to take all reasonable steps, whether before or 
after the Closing


                                     - 10 -

<PAGE>

Date, as may be reasonably necessary to carry out the intention of the 
foregoing, including, without limitation, the delivery to Seller, promptly 
after demand, of any relevant books and records (including any rent or 
Additional Rent statements, receipted bills and copies of tenant checks used 
in payment of such rent or Additional Rent), the execution of any and all 
consents or other documents, and the undertaking of any act necessary for the 
collection of such rents and Additional Rents by Seller.

          (ii) Notwithstanding the provisions of clause (i) above, if after 
the Closing Seller desires to commence legal action or proceedings to collect 
rent and/or Additional rent arrearages owed to Seller by any tenant, Seller 
shall give Purchaser written notice thereof, which notice shall set forth 
such arrearages in reasonable detail including (x) the name of the tenant, 
(y) the amount of the arrearages in question and (z) the length of time such 
amounts are in arrears. Within the ten (10) day period following its receipt 
of said notice, Purchaser may elect, by sending written notice to Seller, to 
commence and prosecute such legal action or proceeding itself in lieu of 
Seller (in which case Purchaser shall commence and prosecute same at its sole 
cost and expense), or join with Seller as plaintiff in such legal action or 
proceeding (in which case, Seller and Purchaser shall share the cost and 
expense of commencing and prosecuting such action or proceeding on an 
equitable basis). If Purchaser shall elect to commence and prosecute such 
legal


                                     - 11 -

<PAGE>

action or proceeding itself, it shall prosecute same vigorously to completion.
All monies received by Purchaser in any such action which are attributable to
arrearages owed to Seller by any tenant shall be remitted promptly to Seller
after receipt thereof (less reasonable attorneys' fees and expenses incurred by
Purchaser if Purchaser shall have commenced and prosecuted the applicable action
or proceeding individually).

          (iii) Purchaser shall cooperate with Seller with respect to the 
collection of arrearages in rent and Additional Rent in respect of periods 
prior to the Closing.

          (iv) The provisions of this Section 3(d) shall survive the Closing.

     (e) If there is a water meter or meters on the Premises, Seller shall 
furnish a reading to a date not more than ten (10) days prior to the Closing 
Date, and the unfixed water charges and sewer rent, if any, based thereon for 
the intervening time shall be apportioned on the basis of such last reading.

     (f) If any of the items subject to apportionment under the foregoing 
provisions of this Section 3 cannot be apportioned at the Closing because of 
the unavailability of the information necessary to compute such 
apportionment, or if any errors or omissions in computing apportionments at 
the Closing are discovered subsequent to the Closing, then such item shall be 
reapportioned and such errors and omissions corrected as soon as practicable 
after the Closing Date and


                                     - 12 -

<PAGE>

the proper party reimbursed, which obligation shall survive the Closing for 
the period from and after the Closing date, through and including June 15, 
1999 as hereinafter provided. Neither party hereto shall have the right to 
require a recomputation of a Closing apportionment or a correction of an 
error or omission in a Closing apportionment unless within the aforestated 
period one of the parties hereto (i) has obtained the previously unavailable 
information or has discovered the error or omission, and (ii) has given 
notice thereof to the other party together with a copy of its good faith 
recomputation of the apportionment and copies of all substantiating 
information used in such recomputation. The failure of a party to obtain any 
previously unavailable information or discover an error or omission with 
respect to an item subject to apportionment hereunder and to give notice 
thereof as provided above within the aforesaid period shall be deemed a 
waiver of its right to cause a recomputation or a correction of an error or 
omission with respect to such item after the Closing Date. Notwithstanding 
any of the foregoing provisions of this Section 3(f) to the contrary, 
Purchaser and Seller agree that the limitation set forth in this Section 3(f) 
shall not apply to the parties' obligations under Section 3(c) and that such 
obligations shall survive the Closing.

     (g) (i) If, on the date of this Agreement, the Premises or any part 
thereof shall be affected by any assessment or assessments which are or may 
become payable in


                                     - 13 -

<PAGE>

installments, of which the first installment is now a charge or lien, or has 
been paid, then (A) Seller shall be obligated to pay all installments of any 
such assessment which are due and payable prior to the Closing Date, and (B) 
for the purposes of this Agreement, all the unpaid installments of any such 
assessment which are to become due and payable on or after the Closing Date 
shall not be deemed to be liens upon the Premises and the payment thereof 
shall be assumed by Purchaser without abatement of the Purchase Price.

          (ii)  If, subsequent to the date hereof, the Premises or any part 
thereof shall become affected by an assessment or assessments, said 
assessments shall not be deemed to be liens upon the Premises and the payment 
thereof shall be assumed by Purchaser without abatement of the Purchase 
Price. In the event any such assessment or assessments, whether payable in 
lump sum or in installments, is due and payable prior to the Closing, and has 
been paid by Seller, Purchaser shall reimburse Seller for same at the Closing.

     (h) Brokerage Commission

          (i) Seller shall be responsible for all commissions with respect to 
Leases that have accrued, and are due and owing, through Closing. Seller 
agrees to indemnify and hold Purchaser harmless from, any and all claims, 
demands, causes of action, losses, damages, liabilities, any costs and 
expenses (including, without limitation, reasonable attorney's fees and 
disbursements), suffered or incurred by


                                     - 14 -

<PAGE>

Purchaser or any of Purchaser's agents or assigns arising out of or in 
connection with claims for such commissions.

          (ii) Purchaser shall be responsible for all commissions with 
respect to Leases that may accrue and become due and owing subsequent to 
Closing. Purchaser agrees to indemnify and hold Seller harmless from any and 
all claims, demands, causes of action, losses, damages, liabilities, and 
costs and expenses (including, without limitation, reasonable attorney's fees 
and disbursements), suffered or incurred by Seller or any of Seller's 
Affiliates arising out of or in connection with claims for such commissions.

     4. Due Diligence Period and Closing Date 

     (a) (i) Notwithstanding anything to the contrary contained herein, 
Purchaser shall have through the period ending 11:59 p.m. on September 10, 
1998 (the "Due Diligence Period") to examine title and surveys to the 
Premises, to review the substance of executed estoppel certificates (if any) 
received by Purchaser, to inspect the physical and financial condition of the 
Premises and to review the Property Information (as defined in Section 
24(e)). Purchaser's right (A) to undertake its due diligence activities, 
including the review of all Property Information, and (B) to enter upon the 
Premises for the purpose of making inspections and tests, shall at all times 
be subject to Purchaser's compliance with the provisions of Sections 18 and 
24 (including, without limitation, Purchaser's obligations


                                     - 15 -

<PAGE>

contained therein to obtain and maintain insurance, indemnify Seller and keep
confidential all Property Information obtained by Purchaser). Neither Purchaser
nor Purchaser's Representatives (as defined in Section 24(e)) shall contact any
of Seller's tenants (except as expressly provided in clause (iii) below).

          (ii) Seller shall cooperate with Purchaser during the Due Diligence 
Period in requesting from tenants at the Premises executed estoppel 
certificates in the form annexed hereto and made a part hereof as Exhibit 
"G", which cooperation shall include (x) sending to tenants estoppel 
certificates prepared by Purchaser promptly after Seller's receipt thereof 
from Purchaser and Seller's approval of said estoppel certificates (which 
approval shall not be unreasonably withheld or delayed) (and concurrently, 
sending to Purchaser concurrent copies of the transmittal letters with 
respect thereto) and (y) delivering to Purchaser any such estoppel 
certificate received from any such tenant promptly after Seller's receipt 
thereof. Notwithstanding the foregoing, it is expressly agreed that (A) 
Seller shall have no obligation to obtain any estoppel certificate of any 
type from any tenant at the Premises, (B) neither the receipt of any estoppel 
certificate by Seller or Purchaser nor the form or content of any estoppel 
certificate received by Seller or Purchaser, shall be a condition to 
Purchaser's obligations hereunder, and (C) Seller's obligation in respect of 
estoppel certificates is limited to the obligation expressly set forth


                                     - 16 -
<PAGE>

in the first (1st) sentence of this subparagraph (ii).

          (iii)  After the Due Diligence Period and prior to the Closing, 
Purchaser shall have the right to communicate with tenants at the Premises at 
times reasonably convenient to both Seller and such tenants upon reasonable 
prior written notice to Seller and when accompanied by Seller or its 
authorized representative. The form and content of each such communication 
shall be subject to the prior written approval of Seller which shall not be 
unreasonably withheld or delayed.

          (iv) Purchaser shall have the right, in its sole and absolute 
discretion, to elect to terminate this Agreement by giving written notice 
("Purchaser's Termination Notice") of such election to Seller at any time 
prior to the expiration of the Due Diligence Period. If Purchaser shall 
timely elect to so terminate this Agreement, this Agreement shall be 
terminated and neither party shall have any further rights, obligations or 
liabilities hereunder, except as otherwise expressly provided in Sections 
4(a)(i), 14, 15, 18, 24 and 25(e), and except that Purchaser shall be 
entitled to a return of the Downpayment (together with all interest accrued 
thereon, if any).

     (b) The delivery of the Deed (as defined in Section 11(a)) and the 
consummation of the transactions contemplated by this Agreement (the 
"Closing") shall take place at the offices of Gordon Altman Butowsky Weitzen 
Shalov & Wein, 114 West 47th Street, New York, New York, at 10:00


                                     - 17 -

<PAGE>

A.M. on September 25, 1998 (the "Closing Date"). Time is of the essence as to 
the Closing Date, with respect to Purchaser's obligations under this 
Agreement. Time is of the essence as to the Closing Date with respect to 
Seller's obligations under this Agreement; provided, however, Seller shall 
have the right to adjourn the Closing Date one or more times for up to sixty 
(60) days in the aggregate in order to eliminate Unacceptable Encumbrances as 
provided in Section 6.

     5. Permitted Encumbrances 

     Seller shall convey and Purchaser shall accept title to the Premises 
subject to those matters set forth on Schedule "3" annexed hereto and made a 
part hereof (collectively the "Permitted Encumbrances"), including, without 
limitation, certain instruments retaining the ownership and operation of 
three office parks of which the Premises form a part. Without limiting any 
other provision of this Agreement, Purchaser acknowledges and agrees that 
such instruments contain certain obligations with respect to the ownership of 
the Premises for which Purchaser, by virtue of its succeeding to the 
ownership of the Premises, shall be responsible from and after the Closing. 
The provisions of this Section 5 shall survive the Closing.

     6. Title

     (a) (i) Purchaser shall order, at its sole cost and expense, within five 
(5) days after the execution of this Agreement, a commitment for an owner's 
fee title insurance


                                     - 18 -

<PAGE>

policy or policies with respect to the Premises (the "Title Commitment") from 
Commonwealth Land Title Insurance Company (the "Title Company") and Purchaser 
shall deliver (or shall cause the Title Company to deliver) a copy of the 
Title Commitment, together with true and complete copies of all instruments 
giving rise to any defects or exceptions to title to the Premises, to 
Seller's attorneys within five (5) days after Purchaser's receipt of the 
Title Commitment. If the Title Commitment indicates the existence of any 
liens, encumbrances or other defects or exceptions in or to title to the 
Premises other than the Permitted Encumbrances (collectively, the 
"Unacceptable Encumbrances") subject to which Purchaser is unwilling to 
accept title and Purchaser gives Seller notice of the same within fifteen 
(15) days after receipt of the Title Commitment, Seller shall undertake to 
eliminate the same subject to Section 6(b). Purchaser hereby waives any right 
Purchaser may have to advance as objections to title or as grounds for 
Purchaser's refusal to close this transaction any Unacceptable Encumbrance 
which Purchaser does not notify Seller of within such fifteen (15) day period 
unless (i) such Unacceptable Encumbrance was first raised by the Title 
Company subsequent to the date of the Title Commitment or Purchaser shall 
otherwise first discover same or be advised of same subsequent to the date of 
the Title Commitment, and (ii) Purchaser shall notify Seller of the same 
within five (5) days after Purchaser first becomes actually aware of such 
Unacceptable Encumbrance (failure to


                                     - 19 -
<PAGE>

so notify Seller shall be deemed to be a waiver by Purchaser of its right to 
raise such Unacceptable Encumbrance as an objection to title or as a ground 
for Purchaser's refusal to close this transaction). Seller, in its sole 
discretion, may adjourn the Closing one or more times for up to sixty(60) 
days in the aggregate in order to eliminate Unacceptable Encumbrances.

          (ii) If Seller is unable (subject to Section 6(b)) to eliminate all 
Unacceptable Encumbrances not waived by Purchaser, or to arrange for title 
insurance reasonably acceptable to Purchaser insuring against enforcement of 
such Unacceptable Encumbrances against, or collection of the same out of, the 
Premises, and to convey title in accordance with the terms of this Agreement 
on or before the Closing Date (whether or not the Closing is adjourned as 
provided in Section 6(a)(i)), Purchaser shall elect on the Closing Date, as 
its sole remedy for such inability of Seller, either (A) to terminate this 
Agreement by notice given to Seller pursuant to Section 17(a), in which event 
the provisions of Section 17(a) shall apply, or (B) to accept title subject 
to such Unacceptable Encumbrances and receive no credit against, or reduction 
of, the Purchase Price.

     (b) Notwithstanding anything to the contrary set forth in this Section 6 
or elsewhere in this Agreement, Seller shall not be obligated to bring any 
action or proceeding, to make any payments or otherwise to incur any expense 
in order to eliminate Unacceptable Encumbrances not


                                     - 20 -
<PAGE>

waived by Purchaser or to arrange for title insurance insuring against 
enforcement of such Unacceptable Encumbrances against, or collection of the 
same out of, the Premises; except that Seller shall satisfy (or cause the 
release of lien of) mortgages, real estate taxes, assessments (subject to 
Section 3(g), judgments against Seller or other Unacceptable Encumbrances 
(collectively, "Liens") secured by or affecting the Premises which can be 
satisfied by payment of liquidated amounts not to exceed $500,000 in the 
aggregate for all Liens (which limitation on such liquidated amounts shall 
not apply to such mortgages and real estate taxes and other liens created by 
Seller which encumber the Premises). Without limiting the generality of the 
preceding provisions of this Section 6(b), for the purposes of this Agreement 
(including, without limitation, Sections 6(a) and 17(a)), Seller's failure or 
refusal to bring any action or proceeding, to make any payments or to 
otherwise incur any expense (except for Seller's obligation to satisfy Liens 
as provided in the exception at the end of the foregoing sentence) in order 
to eliminate Unacceptable Encumbrances not waived by Purchaser or to arrange 
for such title insurance shall be deemed an inability of Seller to eliminate 
such Unacceptable Encumbrances or to arrange for such title insurance and 
shall not be a default by Seller hereunder (willful or otherwise).

     (c) If on the Closing Date there may be any Liens or other encumbrances 
which Seller must pay or discharge in


                                     - 21 -

<PAGE>

order to convey to Purchaser such title as is herein provided to be conveyed,
Seller may use any portion of the Purchase Price to satisfy the same, provided:

          (i) Seller shall deliver to Purchaser or the Title Company, at the 
Closing, instruments in recordable form and sufficient to satisfy such Liens 
or other encumbrances of record together with the cost of recording or filing 
said instruments; or

          (ii) Seller, having made arrangements with the Title Company, shall 
deposit with said company sufficient monies acceptable to said company to 
insure the obtaining and the recording of such satisfactions.

The existence of any such Liens or other encumbrances shall not be deemed 
objections to title if Seller shall comply with the foregoing requirements.

     (d) Purchaser, if request is made by Seller prior to the Closing, agrees 
to provide at the Closing separate checks issued by the Title Company (acting 
in its capacity as Purchaser's agent for the disbursement of the balance of 
the Purchase Price due at Closing) and payable to the order of such parties 
as are designated by Seller, aggregating the outstanding amount of the 
Purchase Price payable pursuant to Section 2(b), in order to facilitate the 
satisfaction or release of any Liens or other encumbrances or the Transfer 
Tax Payments. Similarly, at Seller's election, unpaid Liens for taxes, water 
and sewer charges and assessments, which are


                                     - 22 -

<PAGE>

the obligation of Seller to satisfy and discharge, shall not be objections to 
title, but the amount thereof, plus interest and penalties thereon, if any, 
computed to the third (3rd) business day after the Closing Date, shall be 
deducted from the Purchase Price payable pursuant to Section 2(b) and shall 
be allowed to Purchaser, subject to the provisions for apportionment of 
taxes, water and sewer charges and assessments contained herein.

     (e) If on the Closing Date there shall be conditional bills of sale, 
chattel mortgages or security interests filed against the Premises, the same 
shall not constitute objections to title provided (x) Seller executes and 
delivers an affidavit to the effect either (i) that the personal property 
covered by said conditional bills of sale, chattel mortgages, or security 
interests is no longer in or on the Premises, or (ii) if such personal 
property is still in or on the Premises, that it has been fully paid for, or 
(iii) that such personal property is the property of a tenant of the Premises 
and (y) if any such conditional bill of sale, chattel mortgage or security 
interest is listed in the Title Commitment as an exception to title 
insurance, the Title Company is willing to omit such exception from its 
policy at no additional cost to Purchaser.

     (f) Any franchise or corporate tax open, levied or imposed against 
Seller or other owners in the chain of title that may be a Lien on the 
Closing Date, shall not be an objection to title if the Title Company omits 
same from the


                                     - 23 -

<PAGE>

title policy issued pursuant to the Title Commitment or excepts same but 
insures Purchaser against collection thereof out of the Premises. 

     (g) If a search of title discloses judgments, bankruptcies or other 
returns against other persons or entities having names the same as or similar 
to that of Seller, Seller will deliver to Purchaser and the Title Company an 
affidavit stating that such judgments, bankruptcies or other returns are not 
against Seller, whereupon such returns shall not be deemed an objection to 
title.

     7. Violations

     (a) Except as provided in Section 7(b) or 7(c), all notices of 
violations of laws or governmental ordinances, rules, regulations, orders or 
requirements (collectively, "Laws") which were issued prior to the date of 
this Agreement by any governmental authority having jurisdiction over the 
Premises and which are actually received by Seller prior to the Closing Date 
shall be removed or complied with by Seller on or before the Closing Date. 
Notwithstanding the foregoing provisions of this Section 7(a) to the 
contrary, if such removal or compliance has not been completed on or before 
the Closing Date, Seller may elect to pay to Purchaser at the Closing an 
amount sufficient, in the reasonable judgment of Seller and Purchaser, to pay 
for the performance of the work and provision of the materials necessary to 
effect or


                                     - 24 -

<PAGE>

complete such removal or compliance, or to give Purchaser a credit in such 
amount against the balance of the Purchase Price payable to Seller pursuant 
to Section 2(b), and upon Seller making such payment or giving such credit, 
Purchaser shall be required to accept title to the Premises subject to such 
notices of violations and Seller shall have no further obligation to remove 
or comply with such notices of violations. All notes or notices of violations 
of Laws which are noted or issued on or after the date of this Agreement by 
any governmental authority, and all notes of violations of Laws which were 
noted prior to the date of this Agreement by any governmental authority but 
for which no notice of violation was issued prior to the date of this 
Agreement, and all notices of violations of Laws which were issued prior to 
the date of this Agreement by any governmental authority but not actually 
received by Seller prior to the Closing Date, shall be the sole 
responsibility of Purchaser and Seller shall have no obligation to remove or 
comply with such notes or notices of violations.

     (b) If, in Seller's reasonable judgment, (i) the amount required to be 
spent to remove or comply with all notices of violations which Seller is 
required to remove or comply with pursuant to Section 7(a) shall exceed 
$500,000 in the aggregate or (ii) such removal or compliance shall be 
affected by limitation orders of any federal agency, or any other Laws, in 
such manner that the same cannot be removed or complied with within a 
reasonable time and with reasonable


                                     - 25 -

<PAGE>

certainty, then Seller may elect by notice given to Purchaser at least 5 days 
prior to the Closing Date to terminate this Agreement. If Seller so elects to 
terminate this Agreement, then this Agreement shall be terminated and neither 
party shall have any further rights, obligations or liabilities hereunder, 
except as otherwise expressly provided in Sections 4(a)(i), 14, 15, 18, 24 
and 25(e), and except that Purchaser shall be entitled to a return of the 
Downpayment (together with all interest accrued thereon, if any), unless 
Purchaser, within ten (10) days after receipt of Seller's notice of 
termination, elects by notice to Seller to accept title to the Premises 
subject to all such notices of violations, in which event (x) if Seller 
attempted to terminate this Agreement pursuant to clause (i) above, Purchaser 
shall be entitled to a credit in an amount equal to $500,000 against the 
balance of the Purchase Price payable to Seller pursuant to Section 2(b), or 
(y) if Seller attempted to terminate this Agreement pursuant to clause (ii) 
above, Purchaser shall not receive any credit against, or reduction of, the 
Purchase Price, and in either case Seller shall have no obligation to remove 
or comply with such notices of violations.

     (c) Notwithstanding anything in this Section 7 to the contrary, Seller 
shall not be obligated to remove or comply with any notices of violations to 
the extent such notices relate to any of the following violations:

          (i) any violation which is the obligation of any tenant or other 
occupant of the Premises to remedy;


                                     - 26 -

<PAGE>

and

          (ii) any violations relating to the sidewalks abutting the Premises 
or any signs on or in the Premises.

Purchaser shall accept title to the Premises subject to all such violations.

     8. Representations and Warranties

     (a) (i) Seller represents and warrants to Purchaser as follows:

             (A) SMIPA and SMMA are both duly formed and validly existing 
limited partnerships organized under the laws of the State of New Jersey.

             (B) Seller has the full legal right, power and authority to 
execute and deliver this Agreement and all documents now or hereafter to be 
executed by Seller pursuant to this Agreement (collectively, the "Seller's 
Documents"), to consummate the transaction contemplated hereby, and to 
perform its obligations hereunder and under Seller's Documents.

             (C) This Agreement and Seller's Documents do not and will not 
contravene any provision of the limited partnership agreement or other 
organizational documents of Seller, any judgment, order, decree, writ or 
injunction issued against Seller, or any provision of any Laws applicable to 
Seller. The consummation of the transactions contemplated hereby will not 
result in a breach or constitute


                                     - 27 -

<PAGE>

a default or event of default by Seller under any agreement to which Seller 
or any of its assets are subject or bound and will not result in a violation 
of any Laws applicable to Seller.

             (D) Seller has no knowledge of any leases, licenses or other 
occupancy agreements affecting any portion of the Premises (collectively, the 
"Leases") on the date hereof, except for the Leases listed in Schedule "4" 
annexed hereto and made a part hereof.

             (E) Seller has delivered to Purchaser true and correct copies of 
all Leases in Seller's possession or control.

             (F) The information set forth in the rent roll annexed hereto 
and made a part hereof as Schedule "5" is true and correct in all material 
respects.

             (G) To Seller's knowledge, there are no pending actions, suits, 
proceedings or investigations to which Seller is a party before any court or 
other governmental authority with respect to the Premises except as set forth 
on Schedule "6" annexed hereto and made a part hereof.

             (H) To Seller's knowledge, Seller has no present applications 
pending with any governmental agencies with respect to the construction of 
improvements at the Premises except in respect of the proposed expansions of 
40 Commerce Drive and 47 Commerce Drive as described in items 1 and 2 of 
Schedule "9" annexed hereto and made a part hereof.


                                     - 28 -

<PAGE>

             (I) To Seller's knowledge, Seller is not obligated to dedicate 
or otherwise convey any portion of the Premises for public or quasi-public 
use.

             (J) Seller shall realize net proceeds from the sale of the 
Premises of at least $2,000,000.

             (K) To Seller's knowledge, the financial information delivered 
by Seller to Purchaser with respect to the operation of the Premises is true 
and correct in all material respects.

Copies of the Leases in Seller's possession or control and certain other 
Property Information (as defined in Section 24(e)) have been or will be 
delivered or otherwise made available to Purchaser and, by accepting the 
Deed, Purchaser acknowledges its receipt and acceptance or the availability 
to it thereof and that Purchaser has reviewed the same to its satisfaction 
prior to accepting the Deed. To the extent the copies of the Leases or any 
other Property Information furnished or made available to or otherwise 
obtained by Purchaser prior to the expiration of the Due Diligence Period 
contain provisions or information that are inconsistent with the foregoing 
representations and warranties, such representations and warranties shall be 
deemed modified to the extent necessary to eliminate such inconsistency and 
to conform such representations and warranties to such Leases and other 
Property Information. As used in this Agreement, the words "Seller's 
knowledge" or words of similar import


                                     - 29 -

<PAGE>

shall be deemed to mean, and shall be limited to, the actual (as 
distinguished from implied, imputed or constructive) knowledge of Seller 
after, and based solely upon, making inquiry of Henry R. Taylor, the person 
charged with the management responsibility for the Premises, without such 
person having any obligation to make an independent inquiry or investigation.

          (ii) Purchaser, as its sole remedy for any and all untrue, 
inaccurate or incorrect representations or warranties, shall elect either (x) 
to waive such misrepresentations or breaches of warranties and consummate the 
transactions contemplated hereby without any reduction of or credit against 
the Purchase Price, or (y) to terminate this Agreement by notice given to 
Seller on the Closing Date, in which event, this Agreement shall be 
terminated and neither party shall have any further rights, obligations or 
liabilities hereunder, except as otherwise expressly provided in Sections 
4(a)(i), 14, 15, 18, 24 and 25(e), and except that Purchaser shall be 
entitled to a return of the Downpayment (together with all interest accrued 
thereon, if any). Purchaser acknowledges and agrees that (x) at or prior to 
the Closing, Purchaser's rights and remedies in the event any of Seller's 
representations or warranties made in this Agreement are untrue, inaccurate 
or incorrect shall be only as provided in this Section 8(a)(ii), and (y) if 
the Closing does not occur, Purchaser hereby expressly waives, relinquishes 
and releases all other rights or remedies


                                     - 30 -

<PAGE>

available to it at law, in equity or otherwise (including, without 
limitation, the right to seek damages from Seller) as a result of any of 
Seller's representations or warranties made in this Agreement being untrue, 
inaccurate or incorrect.

          (iii) In the event the Closing occurs: 

               (A) Notwithstanding anything contained in Section 8(a)(ii) or 
elsewhere in this Agreement to the contrary, Purchaser hereby expressly 
waives, relinquishes and releases any right or remedy available to it at law, 
in equity or under this Agreement to make a claim against Seller for damages 
that Purchaser may incur, or to rescind this Agreement and the transactions 
contemplated hereby, as the result of any of Seller's representations or 
warranties being untrue, inaccurate or incorrect if (1) Purchaser actually 
knew or is deemed to have known that such representation or warranty was 
untrue, inaccurate or incorrect at the time of the Closing and Purchaser 
nevertheless closes title hereunder, or (2) Purchaser's damages as a result 
of such representation or warranty being untrue, inaccurate or incorrect are 
less than $500,000. Purchaser shall be "deemed to have actually known" that a 
representation or warranty was untrue, inaccurate or incorrect at the time of 
the Closing to the extent that the Property Information furnished or made 
available to or otherwise obtained by Purchaser contains information which is 
inconsistent with such representation or warranty. 

               (B) Notwithstanding anything contained herein


                                     - 31 -

<PAGE>

to the contrary, if the Closing shall have occurred and Purchaser shall not 
have waived, relinquished and released all rights or remedies available to it 
at law, in equity or otherwise as provided hereunder, the aggregate liability 
of Seller arising pursuant to or in connection with the representations, 
warranties, covenants and other obligations (whether express or implied) of 
Seller in this Agreement and/or the Seller's Documents (including, without 
limitation, the Deed and the A & A Agreements (as defined in Section 11(d)), 
shall not exceed $2,000,000; provided, however, that the foregoing limitation 
shall not be applicable to any misrepresentation or breach of warranty which 
a court of competent jurisdiction determines to be fraudulent.

     The provisions of this Section 8(a)(iii) shall survive the Closing.

          (iv) The representations and warranties of Seller set forth in 
Section 8(a)(i) and elsewhere in this Agreement shall be true, accurate and 
correct in all material respects upon the execution of this Agreement and 
shall be deemed to be repeated on and as of the Closing Date (except as they 
relate only to an earlier date). The representations and warranties (whether 
express or implied) of Seller set forth in Section 8(a)(i) and elsewhere in 
this Agreement, and/or the Seller's Documents (including, without limitation, 
the Deed and the A & A Agreements) shall remain operative and shall survive 
the Closing and the execution and delivery of the Deed for a period of two 
hundred seventy (270) days


                                     - 32 -

<PAGE>

following the Closing Date, and no action or claim based thereon shall be
commenced after such period.

     (b) (i) Purchaser represents and warrants to Seller as follows:

               (A) Purchaser is a duly formed and validly existing 
corporation organized under the laws of the State of Delaware, and is 
qualified under the laws of the State of New Jersey to conduct business 
therein on the Closing Date.

               (B) Purchaser has the full legal right, power, authority and 
financial ability to execute and deliver this Agreement and all documents now 
or hereafter to be executed by it pursuant to this Agreement (collectively, 
the "Purchaser's Documents"), to consummate the transactions contemplated 
hereby, and to perform its obligations hereunder and under Purchaser's 
Documents.

               (C) This Agreement and Purchaser's Documents do not and will 
not contravene any provision of the certificate of incorporation, by-laws or 
other organizational documents of Purchaser, any judgment, order, decree, 
writ or injunction issued against Purchaser, or any provision of any Laws 
applicable to Purchaser. The consummation of the transactions contemplated 
hereby will not result in a breach or constitute a default or event of 
default by Purchaser under any agreement to which Purchaser or any of its 
assets are subject or bound and will not result in a violation of any Laws 
applicable to Purchaser.

               (D) There are no pending actions, suits,


                                     - 33 -

<PAGE>

proceedings or investigations to which Purchaser is a party before any court 
or other governmental authority which may have an adverse impact on the 
transactions contemplated hereby.

               (E) In executing this Agreement, Purchaser acknowledges and 
agrees that it is fully familiar with and understands and expressly agrees 
with the following disclaimer provisions which are in addition to, and not in 
lieu of, any other provisions of this Agreement:

                    (1) Secured Capital Corp ("SCC") has been engaged as 
exclusive advisor to Seller in connection with Seller's solicitation of 
offers for the Premises, said solicitation and potential sale to be governed 
by the Confidential Offering Memorandum (as modified or supplemented) and 
this Agreement

                    (2) No person has been authorized to provide any 
information or to make any representation or warranty, either express or 
implied, in respect of the Premises other than those expressly contained in 
this Agreement and, if provided or made in any other form, such information 
or representation should not be relied upon.

                    (3) The property cash flows in the Confidential Offering 
Memorandum were estimated based on various sources, including the current 
operating information, leases in place, market data obtained through 
conversations with local brokers and appraisers, and current leasing 
activity. These projections were prepared to assist


                                     - 34 -

<PAGE>

Purchaser in its review of the Premises and are only one estimate of the 
future property cash flows. In furtherance of (and not in limitation of) the 
foregoing, Purchaser agrees that it is not relying in any respect on the 
contents of the Confidential Offering Memorandum with respect to the Premises 
and that Purchaser has performed or will perform its own due diligence, as 
contemplated under Article 4 hereof.

               (F) Purchaser has no interest or other rights by virtue of 
this Agreement or otherwise in any land or property owned by Seller in the 
vicinity of the Premises, except such rights, if any, as may be provided in 
those certain office park declarations listed in Schedule 3 and other 
recorded instruments affecting the Premises.

                    (ii)  The representations and warranties of Purchaser set 
forth in Section 8(b)(i) and elsewhere in this Agreement shall be true, 
accurate and correct in all material respects upon the execution of this 
Agreement, shall be deemed to be repeated on and as of the Closing Date 
(except as they relate only to an earlier date) and shall survive the Closing.

     9. Transfer Taxes

     (a) At the Closing, Seller shall pay all transfer taxes (the "Transfer 
Tax Payments") imposed pursuant to the Laws of the State of New Jersey or any 
other governmental authority in respect of the transactions contemplated by 
this Agreement by (subject to Section 6(d)) delivery to the Title


                                     - 35 -

<PAGE>

Company of good, unendorsed, certified or official bank checks, drawn on or 
by a Clearing House Bank and payable to the order of the relevant 
governmental authority together with any return (the "Transfer Tax Return") 
required thereby which shall be duly executed by Seller and Purchaser.

     (b) At the Closing, Purchaser shall pay all recording fees and charges 
in respect of the transactions contemplated by this Agreement except for fees 
and charges for the recording of satisfactions (or releases of lien) of Liens 
encumbering the Premises which are the obligation of Seller hereunder to 
deliver at the Closing.

     10. Conditions Precedent to Closing

     (a) Purchaser's obligation under this Agreement to purchase the Premises 
is subject to the fulfillment of each of the following conditions, subject, 
however, to the provisions of Section 10(c):

          (i) The representations and warranties of Seller contained herein 
shall be true, accurate and correct in all material respects as of the 
Closing Date except to the extent they relate only to an earlier date 
(subject to the provisions of Section 8(a));

          (ii) Seller shall be ready, willing and able to deliver title to 
the Premises in accordance with the terms and conditions of this Agreement;

          (iii) Seller shall have satisfied the condition set forth in 
Section 26 of this Agreement;


                                     - 36 -

<PAGE>

          (iv) Seller shall have delivered all the documents and other items 
required pursuant to Section 11, and shall have performed all other 
covenants, undertakings and obligations, and complied with all conditions 
required by this Agreement to be performed or complied with by the Seller at 
or prior to the Closing; and

          (v) Seller shall have satisfied the condition set forth in Section 
26 of this Agreement.

     (b) Seller's obligation under this Agreement to sell the Premises to
Purchaser is subject to the fulfillment of each of the following conditions,
subject, however to the provisions of Section 10(c):

          (i) the representations and warranties of Purchaser contained
herein shall be true, accurate and correct in all material respects as of
the Closing Date;

          (ii) Purchaser shall have delivered the funds required 
hereunder and all the documents to be executed by Purchaser set forth in 
Section 12 and shall have performed all other covenants, undertakings and 
obligations, and complied with all conditions required by this Agreement to 
be performed or complied with by Purchaser at or prior to the Closing;

          (iii) all consents and approvals of governmental authorities and 
parties to agreements to which Purchaser is a party or by which Purchaser's 
assets are bound that are required with respect to the consummation of the 
transactions contemplated by this Agreement shall have been


                                     - 37 -
<PAGE>

obtained and copies thereof shall have been delivered to Seller at or prior to
the Closing; and

          (iv) on or prior to Closing Date, (A) Purchaser shall not have 
applied for or consented to the appointment of a receiver, trustee or 
liquidator for itself or any of its assets unless the same shall have been 
discharged prior to the Closing Date, and no such receiver, liquidator or 
trustee shall have otherwise been appointed, unless same shall have been 
discharged prior to the Closing Date, (B) Purchaser shall not have admitted 
in writing an inability to pay its debts as they mature, (C) Purchaser shall 
not have made a general assignment for the benefit of creditors, (D) 
Purchaser shall not have been adjudicated a bankrupt or insolvent, or had a 
petition for reorganization granted with respect to Purchaser, (E) Purchaser 
shall not have filed a voluntary petition seeking reorganization or an 
arrangement with creditors or taken advantage of any bankruptcy, 
reorganization, insolvency, readjustment or debt, dissolution or liquidation 
law or statute, or filed an answer admitting the material allegations of a 
petition filed against it in any proceedings under any such law, or had any 
petition filed against it in any proceeding under any of the foregoing laws 
unless the same shall have been dismissed, canceled or terminated prior to 
the Closing Date.

     (c) In the event that any condition contained in Section 10(a) or (b) is 
not satisfied, the party entitled to the satisfaction of such condition as a 
condition to its


                                     - 38 -
<PAGE>

obligation to close title hereunder shall have as its sole remedy hereunder 
the right to elect to (i) waive such unsatisfied condition whereupon title 
shall close as provided in this Agreement or (ii) terminate this Agreement. 
In the event such party elects to terminate this Agreement, this Agreement 
shall be terminated and neither party shall have any further rights, 
obligations or liabilities hereunder, except as otherwise expressly provided 
in Sections 4(a)(i), 14, 15, 18, 24 and 25(e), and except that Purchaser 
shall be entitled to a return of the Downpayment (together with all interest 
accrued thereon, if any). Nothing contained in this Section 10(c) shall be 
construed so as to (x) bestow any right of termination upon a party for the 
failure of a condition to be satisfied unless such party is expressly 
entitled to the satisfaction of such condition as provided in Section 10(a) 
or (b) or (y) reduce or diminish the rights of the parties hereto under 
Section 17.

     11. Documents to be Delivered by Seller at Closing

     At the Closing, Seller shall execute, acknowledge and/or deliver, as 
applicable, the following to Purchaser or the Title Company:

     (a) A Bargain and Sale deed, with covenants against grantor's acts (the 
"Deed") conveying title to the Premises in the form of Exhibit A annexed 
hereto and made a part hereof.


                                     - 39 -

<PAGE>

     (b) The Assignment and Assumption of Leases and Security Deposits in the 
form of Exhibit "B" annexed hereto and made a part hereof assigning without 
warranty or representation all of Seller's right, title and interest, if any, 
in and to the Leases, all guarantees thereof and the security deposits 
thereunder in Seller's possession, if any (the "Lease Assignment").

     (c) The Assignment and Assumption of Licenses and Acceptable Agreements 
in the form of Exhibit "C" annexed hereto and made a part hereof (the 
"License and Acceptable Agreement Assignment") assigning without warranty or 
representation all of Seller's right, title and interest, if any, in and to 
(i) all of the assignable licenses, permits, certificates, approvals, 
authorizations and variances issued for or with respect to the Premises by 
any governmental authority (collectively, the "Licenses"), and (ii) all 
assignable purchase orders, equipment leases, advertising agreements, 
franchise agreements, license agreements, management agreements, leasing and 
brokerage agreements and other service contracts and similar agreements 
relating to the operation of the Premises (collectively, the "Contracts") 
which Purchaser notifies Seller in writing prior to the expiration of the Due 
Diligence Period that Purchaser desires to assume (collectively, the 
"Acceptable Agreements").

     (d) The Assignment and Assumption of Intangible Property in the form of 
Exhibit "D" annexed hereto and made part hereof assigning without warranty or 
representation all


                                     - 40 -
<PAGE>

of Seller's right, title and interest, if any, in and to all intangible 
property owned by Seller with respect to the operation of the Premises listed 
on Schedule "7" annexed hereto and made a part hereof (the "Intangible 
Property Assignment") (the Lease Assignment, the License and Acceptable 
Agreement Assignment and the Intangible Property Assignment are herein 
referred to collectively as the "Acceptable Agreements").

     (e) To the extent in Seller's possession or control, executed 
counterparts of all Leases and New Leases and any amendments, guarantees and 
other documents relating thereto, together with a schedule of all tenant 
security deposits thereunder and the accrued interest on such security 
deposits payable to tenants which are in the possession of or received by 
Seller, and a good, unendorsed certified or official bank check drawn on or 
by a Clearing House Bank payable to the order of Purchaser, or a credit to 
Purchaser against the Purchase Price, in the aggregate amount of such 
security deposits and accrued interest thereon payable to tenants which are 
in the possession of or received by Seller. In the event any such cash 
security deposits and the interest thereon payable to tenants are held by a 
bank, savings bank, trust company or savings and loan association, at 
Seller's option, Seller shall deliver to Purchaser, in lieu of such checks or 
credit, an assignment to Purchaser of such deposits and interest, without 
warranty or representation, and written instructions to the holder thereof to 
transfer such deposits


                                     - 41 -

<PAGE>

and interest to Purchaser. With respect to any lease securities which are 
other than cash, Seller shall execute and deliver to Purchaser at the Closing 
any appropriate instruments of assignment or transfer without warranty or 
representation.

     (f) A bill of sale in the form of Exhibit "E" annexed hereto and made a 
part hereof (the "Bill of Sale") conveying, transferring and selling to 
Purchaser without warranty or representation all right, title and interest of 
Seller in and to all Personal Property.

     (g) Notices to the tenants of the Premises in the form of Exhibit "F" 
annexed hereto and made a part hereof advising the tenants of the sale of the 
Premises to Purchaser and directing that rents and other payments thereafter 
be sent to Purchaser or as Purchaser may direct.

     (h) Executed originals of all estoppel certificates, if any, received by 
Seller from tenants prior to the Closing Date as contemplated in Section 
4(a)(ii).   

     (i) To the extent in Seller's possession or control and not already 
located at the Premises, keys to all entrance doors to, and equipment and 
utility rooms located in, the Premises.

     (j) To the extent in Seller's possession or control, executed 
counterparts of all Licenses and Acceptable Agreements, and all warranties in 
connection therewith which are in effect on the Closing Date and which are 
assigned by Seller.


                                     - 42 -

<PAGE>

     (k) To the extent in Seller's possession or control, plans and 
specifications and management records of the Buildings.

     (l) The Transfer Tax Return, if any.

     (m) A "FIRPTA" affidavit sworn to by Seller in the form of Exhibit "H" 
annexed hereto and made a part hereof. Purchaser acknowledges and agrees that 
upon Seller's delivery of such affidavit, Purchaser shall not withhold any 
portion of the Purchase Price pursuant to Section 1445 of the International 
Revenue Code of 1986, as amended, and the regulations promulgated thereunder.

     (n) Resolutions and/or consents of Seller's partners, authorizing all of 
the transactions contemplated by this Agreement, certified as true and 
correct by a general partner of Purchaser, (A) resolutions of the board of 
directors of Seller's general partner authorizing said corporation to act as 
general partner on behalf of Seller in connection with the consummation of 
all of said transactions, certified as true and correct by the Secretary or 
Assistant Secretary of said corporation and (B) an incumbency certificate 
executed by the Secretary or Assistant Secretary of said corporation(s) with 
respect to those officers thereof executing any documents or instruments in 
connection with the transactions contemplated herein.

     (o) The affidavit described in Section 6(g).


                                     - 43 -

<PAGE>

     (p) All other documents Seller is required to deliver pursuant to the 
provisions of this Agreement.

     (q) An updated rent roll in the form annexed hereto as Schedule "5".

     (r) An updated arrearage schedule including the information described in 
clauses (x), (y) and (z) of Section 3(d)(ii).

     (s) A title affidavit as is customarily delivered by sellers of office 
and industrial property similar to the Premises at the closing of the sale 
thereof in the state and county in which the Premises are situated, provided 
that Seller and Purchaser shall have mutually agreed upon the form thereof. 
Seller and Purchaser shall endeavor in good faith to agree upon the form of 
such title affidavit prior to the expiration of the Due Diligence Period, but 
shall have no obligation to do so.

     12. Documents to be Delivered by Purchaser at Closing

     At the Closing, Purchaser shall execute, acknowledge and/or deliver, as 
applicable, the following to Seller:

          (a) The cash portion of the Purchase Price payable at the Closing 
pursuant to Section 2(b), subject to apportionments, credits and adjustments 
as provided in this Agreement.

          (b) The Bill of Sale.


                                     - 44 -

<PAGE>

          (c) If Purchaser is a corporation, (i) copies of the certificate of 
incorporation and by-laws of Purchaser and of the resolutions of the board of 
directors of Purchaser authorizing the execution, delivery and performance of 
this Agreement and the consummation of the transactions contemplated by this 
Agreement certified as true and correct by the Secretary or Assistant 
Secretary of Purchaser; (ii) a good standing certificate issued by the state 
of incorporation of Purchaser, dated within thirty (30) days of the Closing 
Date; (iii) a good standing certificate issued by the State of New Jersey, 
dated within thirty (30) days of the Closing Date; and (iv) an incumbency 
certificate executed by the Secretary or Assistant Secretary of Purchaser 
with respect to those officers of Purchaser executing any documents or 
instruments in connection with the transactions contemplated herein.

          (d) Written instructions to Escrow Agent to release the Fund for 
disbursement to Seller.

          (e) The notice to tenants described in Section 11(g) above.

          (f) (i) If Purchaser is a partnership, resolutions and/or consents 
of Purchaser's partners, authorizing all of the transactions contemplated by 
this Agreement, certified as true and correct by a general partner of 
Purchaser, (A) if Purchaser or the general partner of Purchaser is a 
corporation, resolutions of said corporation's board of


                                     - 45 -

<PAGE>

directors authorizing said corporation to consummate (or, in the case of a 
corporate general partner if Purchaser is a Partnership, to act as general 
partner on behalf of Purchaser in connection with the consummation of) all of 
said transactions, certified as true and correct by the Secretary or 
Assistant Secretary of said corporation; (B) good standing certificates of 
Purchaser (or, if Purchaser is a partnership having a corporate general 
partner, of Purchaser and said corporation) issued by the state of 
organization of Purchaser (and in the case of such corporate general partner, 
the state of incorporation of said corporation), dated within thirty (30) 
days of the Closing Date; and (C) an incumbency certificate executed by the 
Secretary or Assistant Secretary of said corporation(s) with respect to those 
officers thereof executing any documents or instruments in connection with 
the transactions contemplated herein.

          (g) The A & A Agreements.

          (h) All other documents required to be delivered by Purchaser 
pursuant to this Agreement and such other documents as the Seller or the 
Title Company deems reasonably necessary and appropriate to complete the 
Closing.

     13. Operation of the Premises prior to the Closing Date 

     Between the date hereof and the Closing Date, Seller will operate and 
continue to maintain the Premises in the same manner as it operated and 
maintained the Premises


                                     - 46 -

<PAGE>

prior to the date hereof.  In connection therewith:

     (a) (i) Except as hereinafter provided in this Section 13(a), Seller may 
modify, extend, renew, cancel or permit the expiration of any Lease or enter 
into any proposed Lease of all or any portion of the Premises (A) during the 
Due Diligence Period without Purchaser's consent, provided that no later than 
five (5) days prior to the end of the Due Diligence Period, Seller shall 
deliver a copy of such modification, extension, renewal, or cancellation to 
Purchaser together with a detailed statement of New Lease Expenses with 
respect thereto, and (B) after the Due Diligence Period and prior to the 
Closing with Purchaser's prior consent in all instances (which consent shall 
not be unreasonably withheld and shall be given or denied, with the reasons 
for any such denial, within the applicable period specified in Section 
13(a)(iv). If (1) pursuant to the provisions of the preceding sentence 
Purchaser's consent is required for any action Seller proposes to take with 
respect to a then existing or proposed Lease and Purchaser denies its consent 
to such action, and (2) the period between the end of the Due Diligence 
Period and the Closing has exceeded fifteen (15) days (other than by reason 
of adjournment by Seller), then Seller shall have the right within ten (10) 
days after receipt of Purchaser's notice of denial to elect by notice to 
Purchaser to terminate this Agreement. If Seller so elects to terminate this 
Agreement, this Agreement shall be terminated and neither party shall have 
any further rights,


                                     - 47 -

<PAGE>

obligations or liabilities hereunder, except as otherwise expressly provided in
Sections 4(a)(i), 14, 15, 18, 24 and 25(e), and except that Purchaser shall be
entitled to a return of the Downpayment (together with all interest accrued
thereon, if any), unless, within five (5) days after receipt of Seller's notice,
Purchaser gives Seller its consent to such proposed action and states in such
consent that it irrevocably retracts its denial notice, in which event Seller's
termination notice shall be void and of no force or effect and this Agreement
shall not terminate as a result of such earlier denial.

          (ii)  If Seller enters into any Leases, or if there is any 
extension or renewal of any Leases, whether or not such Leases provide for 
their extension or renewal, or any expansion or modification of any Leases 
(each, a "New Lease"), Seller shall keep accurate records of all expenses 
(collectively, "New Lease Expenses") incurred in connection with each New 
Lease, including, without limitation, the following: (A) brokerage 
commissions and fees relating to such leasing transaction, (B) expenses 
incurred for repairs, improvements, equipment, painting, decorating, 
partitioning and other items to satisfy the tenant's requirements with regard 
to such leasing transaction, (C) the cost of removal and/or abatement of 
asbestos or other hazardous or toxic substances located in the demised space, 
(D) reimbursements to the tenant for the cost of any of the items described 
in the preceding clauses (B) and (C), (E) legal fees for


                                     - 48 -

<PAGE>

services in connection with the preparation of documents and other services 
rendered in connection with the effectuation of the leasing transaction, (F) 
rent concessions relating to the demised space provided the tenant has the 
right to take possession of such demised space during the period of such rent 
concessions, and (G) expenses incurred for the purpose of satisfying or 
terminating the obligations of a tenant under a New Lease to the landlord 
under another lease (whether or not such other lease covers space in the 
Premises).

          (iii) The New Lease Expenses for each New Lease allocable to and 
payable by Seller shall be determined by multiplying the amount of such New 
Lease Expenses by a fraction, the numerator of which shall be the number of 
days contained in that portion, if any, of the term of such New Lease 
commencing on the date on which the tenant thereunder shall have commenced to 
pay fixed rent ("Rent Commencement Date") and expiring on the date 
immediately preceding the Closing Date, and the denominator of which shall be 
the total number of days contained in the period commencing on the Rent 
Commencement Date and expiring on the date of the scheduled expiration of the 
term of such New Lease, and the remaining balance of the New Lease Expenses 
for each New Lease shall be allocable to and payable by Purchaser. For 
purposes of this Section 13(a)(iii), the Rent Commencement Date under a 
renewal, extension, expansion or modification of a Lease shall be deemed to 
be (A) in the case of a renewal or


                                     - 49 -

<PAGE>

extension (whether effective prior to or after the Closing, or in the form of 
an option exercisable in the future), the first date during such renewal or 
extension period after the originally scheduled expiration of the term of 
such Lease on which the tenant under such Lease commences to pay fixed rent, 
(B) in the case of an expansion (whether effective prior to or after the 
Closing, or in the form of an option exercisable in the future), the date on 
which the tenant under such Lease commences to pay fixed rent for the 
additional space, and (C) in the case of a modification not also involving a 
renewal, extension or expansion of such Lease, the effective date of such 
modification agreement. At such time as Tenant commences paying rent in 
accordance with its Lease, Purchaser shall reimburse Seller for all New Lease 
Expenses theretofore paid by Seller, if any, in excess of the portion of the 
New Lease Expenses allocated to Seller pursuant to the provisions of the 
preceding sentence. The provisions of this Section 13(a)(iii) shall survive 
the Closing.

          (iv)  With respect to any proposed action by Seller to be submitted 
to Purchaser for its consent pursuant to Section 13(a)(i) (which submittal 
shall include an itemized statement of New Lease Expenses), Purchaser shall 
consent or deny its consent, with the reasons for any such denial, within 
seven (7) days after receipt by Purchaser of Seller's notice requesting 
Purchaser's consent to the proposed action relating to such existing or 
proposed Lease.


                                     - 50 -

<PAGE>

If Purchaser fails to reply to Seller's request for consent pursuant to the
provisions of Subsections 13(a)(i) in a notice given within the above-described
applicable time period or if Purchaser expressly denies its consent but fails to
provide Seller with the reasons for such denial, Purchaser's consent shall be
deemed to have been granted.

     (b) Notwithstanding anything to the contrary contained in this 
Agreement, Seller reserves the right before the Due Diligence Period expires, 
but is not obligated, to institute summary proceedings against any tenant or 
terminate any Lease as a result of a default by the tenant thereunder prior 
to the Closing Date. Seller shall give Purchaser prompt notice of the 
commencement of any such proceeding, but in all cases at least seven (7) days 
prior to commencing such proceeding. Seller makes no representations and 
assumes no responsibility with respect to the continued occupancy of the 
Premises or any part thereof by any tenant. The removal of a tenant whether 
by summary proceedings or otherwise prior to the Closing Date shall not give 
rise to any claim on the part of Purchaser. Further, Purchaser agrees that it 
shall not be grounds for Purchaser's refusal to close this transaction that 
any tenant is a holdover tenant or in default under its Lease on the Closing 
Date and Purchaser shall accept title subject to such holding over or default 
without credit against, or reduction of, the Purchase Price.

     (c)  Except as hereinafter provided in this Section


                                     - 51 -

<PAGE>

13(c), Seller may cancel, modify, extend, renew or permit the expiration of 
Contracts or enter into any new Contract without Purchaser's prior consent; 
provided, however, after the expiration of the Due Diligence Period, Seller 
shall not modify, extend, renew or cancel (except as a result of a default by 
the other party thereunder) any Acceptable Agreements, without Purchaser's 
prior consent in each instance, which consent shall not be unreasonably 
withheld or delayed, and if withheld, Purchaser shall promptly give Seller a 
notice stating the reasons therefore; provided, however, that Purchaser's 
consent shall not be required to the aforestated actions if such Acceptable 
Agreement may be terminated at any time on not more than thirty (30) days' 
prior notice by Seller, or its successor, without the payment of a penalty. 
Seller shall send written notices of termination of all Contracts other than 
Acceptable Agreements at or prior to the Closing and deliver copies of such 
notices to Purchaser's counsel at or prior to the Closing.

     (d) Seller will keep in force and effect with respect to the Premises 
the insurance policies currently carried by Seller and listed on Schedule "8" 
annexed hereto and made a part hereof or policies providing similar coverage.

     (e) Promptly after Seller's delivery or receipt thereof, Seller shall 
deliver to Purchaser copies of the following:

          (i) Any notice of default given or


                                     - 52 -

<PAGE>

received under any of the Leases or Acceptable Agreements;

          (ii) Any Lease or Contract, amendment, modification, renewal or new 
Lease or Contract executed by Seller as expressly permitted by this 
Agreement, as fully executed; and

          (iii) A copy of any tax bill, notice or statement of value or 
notice of change in tax rate or assessment affecting or relating to the 
Premises.

     14. As Is

     (a) Subject to the provisions of this Agreement, Purchaser agrees to 
accept title to the Premises on an "as-is-where-is and with all faults" basis.

     (b) This Agreement, as written, contains all the terms of the agreement 
entered into between the parties as of the date hereof, and Purchaser 
acknowledges that neither Seller nor any of Seller's Affiliates (as defined 
in Section 25(e)), nor any of their agents or representatives, nor Broker (as 
defined in Section 15) has made any represent ations or held out any 
inducements to Purchaser, and Seller hereby specifically disclaims any 
representation, oral or written, past, present or future, other than those 
specifically set forth in Sections 8(a) and 15. Without limiting the 
generality of the foregoing, Purchaser has not relied on any representations 
or warranties, and neither Seller nor any of Seller's Affiliates, nor any of 
their agents or representatives has or is willing to make any


                                     - 53 -

<PAGE>

representations or warranties, express or implied, other than as may be 
expressly set forth in this Agreement, as to (i) the status of title to the 
Premises, (ii) the Leases, (iii) the Contracts, (iv) the Labor Contracts, (v) 
the Other Agreements, (vi) the Licenses, (vii) the current or future real 
estate tax liability, assessment or valuation of the Premises; (viii) the 
potential qualification of the Premises for any and all benefits conferred by 
any Laws whether for subsidies, special real estate tax treatment, insurance, 
mortgages or any other benefits, whether similar or dissimilar to those 
enumerated; (ix) the compliance of the Premises in its current or any future 
state with applicable Laws or any violations thereof, including, without 
limitation, those relating to environmental or zoning matters, and the 
ability to obtain a change in the zoning or a variance in respect to the 
Premises' non-compliance, if any, with zoning Laws; (x) the nature and extent 
of any right-of-way, lease, possession, lien, encumbrance, license, 
reservation, condition or otherwise; (xi) the availability of any financing 
for the purchase, alteration, rehabilitation or operation of the Premises 
from any source, including, without limitation, any government authority or 
any lender; (xii) the current or future use of the Premises, including, 
without limitation, the Premises' use for commercial, manufacturing or 
general office purposes; (xiii) the present and future condition and 
operating state of any Personal Property and the present or future structural 
and physical condition of


                                     - 54 -

<PAGE>

the Buildings, their suitability for rehabilitation or renovation, or the need
for expenditures for capital improvements, repairs or replacements thereto;
(xiv) the viability or financial condition of any tenant; (xv) the status of the
leasing market in which the Premises is located; or (xvi) the actual or
projected income or operating expenses of the Premises.

     (c) In addition to and not in lieu of the provisions of this Article 14, 
the terms and conditions of the Disclaimer are hereby incorporated herein by 
reference.

     (d) Purchaser acknowledges that Seller has afforded (and will, pursuant 
to this Agreement, afford) Purchaser the opportunity for full and complete 
investigations, examinations and inspections of the Premises and all Property 
Information. Purchaser acknowledges and agrees that (i) the Property 
Information delivered or made available to Purchaser and Purchaser's 
Representatives by Seller or Seller's Affiliates, or any of their agents or 
representatives may have been prepared by third parties and may not be the 
work product of Seller and/or any of Seller's Affiliates; (ii) neither Seller 
nor any of Seller's Affiliates has made any independent investigation or 
verification of, or has any knowledge of, the accuracy or completeness of, 
the Property Information; (iii) the Property Information delivered or made 
available to Purchaser and Purchaser's Representatives is furnished to each 
of them at the request, and for the convenience of, Purchaser; (iv)


                                     - 55 -

<PAGE>

Purchaser is relying solely on its own investigations, examinations and 
inspections of the Premises and those of Purchaser's Representatives and is 
not relying in any way on the Property Information furnished by Seller or any 
of Seller's Affiliates, or any of their agents or representatives; (v) Seller 
expressly disclaims any representations or warranties with respect to the 
accuracy or completeness of the Property Information and Purchaser releases 
Seller and Seller's Affiliates, and their agents and representatives, from 
any and all liability with respect thereto; and (vi) any further distribution 
of the Property Information is subject to Section 24.

     (e) Purchaser or anyone claiming by, through or under Purchaser, hereby 
fully and irrevocably releases Seller and Seller's Affiliates, and their 
agents and representatives, from any and all claims that it may now have or 
hereafter acquire against Seller or Seller's Affiliates, or their agents or 
representatives for any cost, loss, liability, damage, expense, action or 
cause of action, whether foreseen or unforeseen, arising from or related to 
any construction defects, errors or omissions on or in the Premises, the 
presence of environmentally hazardous, toxic or dangerous substances, or any 
other conditions (whether patent, latent or otherwise) affecting the 
Premises, except for claims against Seller based upon any obligations and 
liabilities of Seller expressly provided in this Agreement. Purchaser further 
acknowledges and agrees that this release


                                     - 56 -

<PAGE>

shall be given full force and effect according to each of its expressed terms 
and provisions, including, but not limited to, those relating to unknown and 
suspected claims, damages and causes of action. As a material covenant and 
condition of this Agreement, Purchaser agrees that in the event of any such 
construction defects, errors or omissions, the presence of environmentally 
hazardous, toxic or dangerous substances, or any other conditions affecting 
the Premises, Purchaser shall look solely to Seller's predecessors in 
interest or to such contractors and consultants as may have contracted for 
work in connection with the Premises for any redress or relief, except for 
claims against Seller based upon any obligations and liabilities of Seller 
expressly provided in this Agreement. Purchaser further understands that some 
of Seller's predecessors in interest or such contractors and consultants may 
have filed petitions under the bankruptcy code and Purchaser may have no 
remedy against such predecessors, contractors or consultants.

     (f) Purchaser's failure, for any reason whatsoever, to elect to 
terminate this Agreement pursuant to Section 4(a)(ii) shall be deemed an 
acknowledgment by Purchaser that Purchaser has inspected the Premises, is 
thoroughly acquainted with and accepts its condition, and has reviewed, to 
the extent necessary in its discretion, all the Property Information. Seller 
shall not be liable or bound in any manner by information pertaining to the 
Premises or the rents furnished by Seller, Seller's Affiliates, their agents


                                     - 57 -

<PAGE>

or representatives, any real estate broker, including, without limitation, the
Broker, or other person.

     (g) The provisions of this Section 14 shall survive the termination of 
this Agreement and the Closing.

     15. Broker

     Purchaser and Seller represent and warrant to each other that Secured 
Capital Corp. (the "Broker") is the sole broker with whom it has dealt in 
connection with the Property and the transactions described herein. Seller 
shall be liable for, and shall indemnify Purchaser against, all brokerage 
commissions or other compensation due to the Broker arising out of the 
transaction contemplated in this Agreement, which compensation shall be paid 
subject and pursuant to a separate agreement between Seller and the Broker. 
Each party hereto agrees to indemnify, defend and hold the other harmless 
from and against any and all claims, causes of action, losses, costs, 
expenses, damages or liabilities, including reasonable attorneys' fees and 
disbursements, which the other may sustain, incur or be exposed to, by reason 
of any claim or claims by any broker, finder or other person, except (in the 
case of Purchaser as indemnitor hereunder) the Broker, for fees, commissions 
or other compensation arising out of the transactions contemplated in this 
Agreement if such claim or claims are based in whole or in part on dealings 
or agreements with the indemnifying party. The obligations and 
representations and


                                     - 58 -

<PAGE>

warranties contained in this Section 15 shall survive the termination of this 
Agreement and the Closing.

     16. Casualty; Condemnation

     (a) Damage or Destruction: Seller and Purchaser agree that, as between 
Seller and Purchaser, risk of loss shall be as set forth in this Section 
16(a). If a "material" part (as hereinafter defined) of the Premises is 
damaged or destroyed by fire or other casualty, Seller shall immediately 
notify Purchaser of such fact and, except as hereinafter provided, Purchaser 
shall have the option to terminate this Agreement upon notice to Seller given 
not later than ten (10) days after receipt of Seller's notice. If this 
Agreement is so terminated, the provisions of Section 16(d) shall apply. 
Notwithstanding the foregoing, if a "material" part of the Premises is 
damaged or destroyed and Purchaser elects to terminate this Agreement as 
provided above, Purchaser's election shall be ineffective if within ten (10) 
days after Seller's receipt of Purchaser's election notice, Seller shall 
elect by notice to Purchaser to repair such damage or destruction and shall 
thereafter complete such repair within 120 days after the then scheduled 
Closing Date at the time of Purchaser's election. If Seller makes such 
election to repair, Seller shall have the right to adjourn the Closing Date 
one or more times for up to 120 days in the aggregate in order to complete 
such repairs and shall have the right to retain all insurance proceeds which 
Seller may be entitled to


                                     - 59 -

<PAGE>

receive as a result of such damage or destruction. If (i) Purchaser does not 
elect to terminate this Agreement, (ii) Purchaser elects to terminate this 
Agreement but such election is ineffective because Seller elects to repair 
such damage and completes such repair within such 120-day period provided 
above, or (iii) there is damage to or destruction of an "immaterial" part 
("immaterial" is herein deemed to be any damage or destruction which is not 
"material", as such term is hereinafter defined) of the Premises, Purchaser 
shall close title as provided in this Agreement and, at the Closing, Seller 
shall, unless Seller has repaired such damage or destruction prior to the 
Closing, (x) pay over to Purchaser the proceeds of any insurance collected by 
Seller less the amount of all costs incurred by Seller in connection with the 
repair of such damage or destruction, and (y) assign and transfer to 
Purchaser all right, title and interest of Seller in and to any uncollected 
insurance proceeds which Seller may be entitled to receive from such damage 
or destruction. A "material" part of the Premises shall be deemed to have 
been damaged or destroyed if more than 20% of the rentable area of the Office 
Properties is destroyed.

     (b) Condemnation: If, prior to the Closing Date, all or any 
"significant" portion (as hereinafter defined) of the Premises is taken by 
eminent domain or condemnation (or is the subject of a pending taking which 
has not been consummated), Seller shall immediately notify Purchaser of such 
fact and the Purchaser shall have the option to


                                     - 60 -

<PAGE>

terminate this Agreement upon notice to the Seller given not later than ten (10)
days after receipt of the Seller's notice. If this Agreement is so terminated,
the provisions of Section 16(d) shall apply. If Purchaser does not elect to
terminate this Agreement, or if an "insignificant" portion ("insignificant" is
herein deemed to be any taking which is not "significant", as such term is
herein defined) of the Premises is taken by eminent domain or condemnation, at
the Closing Seller shall assign and turnover, and Purchaser shall be entitled to
receive and keep, all awards or other proceeds for such taking by eminent domain
or condemnation. A "significant" portion of the Premises means (i) any portion
of the Office Properties, (ii) a portion of the parking areas exclusively
serving the Office Properties if the taking thereof reduces the remaining
available number of parking spaces below the minimum legally required; or (iii)
a legally required driveway on the Land if such driveway is the predominant
means of ingress thereto or egress from any of the Office Properties.

     (c) If Purchaser elects to terminate this Agreement pursuant to Section 
16(a) or 16(b), this Agreement shall be terminated and neither party shall 
have any further rights, obligations or liabilities hereunder, except as 
otherwise expressly provided in Sections 4(a)(i), 14, 15, 18, 24 and 25(e), 
and except that Purchaser shall be entitled to a return of the Downpayment 
(together with all interest accrued thereon, if any).


                                     - 61 -

<PAGE>

     17. Remedies

     (a) If the Closing fails to occur by reason of Seller's inability 
(subject to Section 6(b)) to perform its obligations under this Agreement, 
then Purchaser, as its sole remedy for such inability of Seller, may 
terminate this Agreement by notice to Seller. If Purchaser elects to 
terminate this Agreement, then this Agreement shall be terminated and neither 
party shall have any further rights, obligations or liabilities hereunder, 
except as otherwise expressly provided in Sections 4(a)(i), 14, 15, 18, 24 
and 25(e), and except that Purchaser shall be entitled to a return of the 
Downpayment (together with all interest accrued thereon, if any). Except as 
set forth in this Section 17(a), Purchaser hereby expressly waives, 
relinquishes and releases any other right or remedy available to it at law, 
in equity or otherwise by reason of Seller's inability to perform its 
obligations hereunder.

     (b) In the event of a default hereunder by Purchaser or if the Closing 
fails to occur by reason of Purchaser's failure or refusal to perform its 
obligations hereunder, then Seller may terminate this Agreement by notice to 
Purchaser. If Seller elects to terminate this Agreement, then this Agreement 
shall be terminated and Seller's sole remedy shall be to retain the 
Downpayment (together with all interest accrued thereon, if any) as 
liquidated damages for all loss, damage and expenses suffered by Seller, it 
being


                                     - 62 -

<PAGE>

agreed that Seller's damages are impossible to ascertain, and neither party 
shall have any further rights, obligations or liabilities hereunder, except 
as otherwise expressly provided in Sections 4(a)(i), 14, 15, 18, 24 and 
25(e). Except as set forth in this Section 17(b) and Section 24(f), Seller 
hereby expressly waives, relinquishes and releases any other right or remedy 
available to it at law, in equity or otherwise by reason of Purchaser's 
default hereunder or Purchaser's failure or refusal to perform its 
obligations hereunder.

     (c) As a condition precedent to Purchaser exercising any right it may 
have to bring an action for specific performance as the result of Seller's 
default, Purchaser must commence such an action within one hundred eighty 
(180) days after the occurrence of such default. Purchaser agrees that its 
failure to timely commence such an action for specific performance within 
such one hundred eighty (180) day period shall be deemed a waiver by it of 
its right to commence such an action.

     (d) Subject to the provisions of this Agreement, (including without 
limitation Section 17(c) above), Purchaser reserves all of its right and 
remedies, at law or in equity.

     18. Purchaser's Access to the Premises

     Purchaser and Purchaser's Representatives shall have the right to enter 
upon the Premises for the sole purpose of inspecting the Premises and making 
surveys, soil borings, engineering tests and other investigations,


                                     - 63 -

<PAGE>

inspections and tests (collectively, "Investigations"), provided (x) 
Purchaser shall give Seller not less than two (2) business days' prior notice 
before the first such entry and one (1) business days' prior notice before 
each subsequent entry, (y) the first such notice shall include sufficient 
information to permit Seller to review the scope of the proposed 
Investigations, and (z) with the exception of a "Phase I-type" environmental 
review, neither Purchaser nor Purchaser's Representatives shall conduct any 
asbestos, environmental or other hazardous materials Investigations on the 
Premises without Seller's prior written consent which shall not be 
unreasonably withheld, delayed or conditioned. Any entry upon the Premises 
and all Investigations shall be during Seller's normal business hours and at 
the sole risk and expense of Purchaser and Purchaser's Representatives, and 
shall not interfere with the activities on or about the Premises of Seller, 
its tenants and their employees and invitees. Purchaser shall:

     (a) promptly repair any damage to the Premises resulting from any such 
Investigations and replace, refill and regrade any holes made in, or 
excavations of, any portion of the Premises used for such Investigations so 
that the Premises shall be in the same condition that it existed in prior to 
such Investigations;

     (b) fully comply with all Laws applicable to the Investigations and all 
other activities undertaken in connection therewith;


                                     - 64 -

<PAGE>

     (c) permit Seller to have a representative present during all 
Investigations undertaken hereunder;

     (d) take all actions and implement all protections necessary to ensure 
that all actions taken in connection with the Investigations, and the 
equipment, materials, and substances generated, used or brought onto the 
Premises pose no threat to the safety or health of persons or the 
environment, and cause no damage to the Premises or other property of Seller 
or other persons;

     (e) furnish to Seller, at no cost or expense to Seller, copies of all 
surveys, soil test results, engineering, asbestos, environmental and other 
studies and reports relating to the Investigations which Purchaser shall 
obtain with respect to the Premises promptly after Purchaser's receipt of 
same;

     (f) maintain or cause to be maintained through Closing, at Purchaser's 
expense, a policy of comprehensive general public liability insurance, with a 
broad form contractual liability endorsement covering Purchaser's 
indemnification obligations contained in Sections 18(h) and 24(c), and with a 
combined single limit of not less than $1,000,000 general liability and at 
least $5,000,000 excess umbrella liability, insuring Purchaser and Seller as 
additional insureds, against any injuries or damages to persons or property 
that may result from or are related to (i) Purchaser's and/or Purchaser's 
Representatives' entry upon the Premises, (ii) any Investigations or other


                                     - 65 -

<PAGE>

activities conducted thereon, and (iii) any and all other activities 
undertaken by Purchaser and/or Purchaser's Representatives, and deliver a 
copy of such certificate of insurance evidencing coverage to Seller prior to 
the first entry on the Premises;

     (g) not allow the Investigations or any and all other activities 
undertaken by Purchaser or Purchaser's Representatives to result in any 
liens, judgments or other encumbrances being filed or recorded against the 
Premises, and Purchaser shall, at its sole cost and expense, promptly 
discharge of record any such liens or encumbrances that are so filed or 
recorded (including, without limitation, liens for services, labor or 
materials furnished); and

     (h) indemnify Seller and Seller's Affiliates and hold Seller and 
Seller's Affiliates harmless from and against any and all claims, demands, 
causes of action, losses, damages, liabilities, costs and expenses 
(including, without limitation, attorneys' fees and disbursements), suffered 
or incurred by Seller or any of Seller's Affiliates and arising out of or in 
connection with (i) Purchaser's and/or Purchaser's Representatives' entry 
upon the Premises, (ii) any Investigations or other activities conducted 
thereon by Purchaser or Purchaser's Representatives, (iii) any liens or 
encumbrances filed or recorded against the Premises as a consequence of the 
Investigations or any and all other activities undertaken by Purchaser or 
Purchaser's Representatives, and/or (iv) any and all other activities


                                     - 66 -

<PAGE>

undertaken by Purchaser or Purchaser's Representatives with respect to the 
Premises.

The provisions of this Section 18 shall survive the termination of this 
Agreement and the Closing.

     19. [Intentionally Deleted]

     20. [Intentionally Deleted]

     21. Assignment

     This Agreement may not be assigned by Purchaser and any assignment or 
attempted assignment by Purchaser shall constitute a default by Purchaser 
hereunder and shall be null and void. However, Purchaser may assign this 
Agreement to (a) an entity of which Purchaser owns 100% of the stock or other 
beneficial interest, or (b) an entity (a "COPT Entity") which owns 100% of 
Purchaser's stock, or (c) an entity in which a COPT Entity is a general 
partner. In no event will any assignment by Purchaser relieve Purchaser from 
its obligations hereunder, it being expressly understood and agreed that the 
named Purchaser herein shall remain fully and primarily liable for 
obligations of Purchaser hereunder. The provisions of this Section 21 shall 
not preclude Purchaser from designating any affiliated party as grantee under 
the Deed.

     22. Access to Records

     (a) For a period of two (2) years subsequent to


                                     - 67 -

<PAGE>

the Closing Date, Seller, Seller's Affiliates and their employees, agents and
representatives shall be entitled to access during business hours to all
documents, books and records given to Purchaser by Seller at the Closing for tax
and audit purposes, regulatory compliance, and cooperation with governmental
investigations upon reasonable prior notice to Purchaser, and shall have the
right to make copies of such documents, books and records.

     (b) Subject to Seller's fiduciary duties and its obligations under 
confidentiality provisions of agreements by which it is bound, Seller shall 
provide Purchaser's representatives, attorneys, accountants, auditors or 
financial advisors, at Purchaser's sole cost and expense, with reasonable 
access, during normal business hours and upon reasonable advance written 
notice, to all financial information relating to the Premises in Seller's 
possession in respect of the current and immediately preceding fiscal years 
reasonably deemed necessary by said representatives, attorneys, accountants, 
auditors or financial advisors for purposes of their preparation of such 
audited financial statements relating to the Premises as are required to be 
disclosed pursuant to Rule 3-14 under Regulation S-X under the Securities Act 
of 1933 or in connection with the financial statement requirements of Form 
8-K under the Securities Act of 1934. For purposes hereof, any information 
described above provided to Purchaser, its auditors, advisors or 
representatives shall be deemed to be "Property


                                     - 68 -

<PAGE>

Information" in respect of which the provisions of Article 24 shall apply.

     23. Notices

     All notices, elections, consents, approvals, demands, objections, 
requests or other communications which Seller, Purchaser or Escrow Agent may 
be required or desire to give pursuant to, under or by virtue of this 
Agreement must be in writing and sent by (a) first class U.S. certified or 
registered mail, return receipt requested, with postage prepaid, or (b) 
express mail or courier (for next business day delivery), in each case, to 
the addresses set forth below, or (c) by telecopier to the telecopy numbers 
set forth below provided that a hard copy is sent the same day in the manner 
prescribed in either (a) or (b) above, addressed as follows:

                  If to Seller:

                  South Middlesex Industrial Park
                  Associates, L.P. and
                  SM Monroe Associates, L.P.
                  c/o The Taylor Simpson Group
                  One Rockefeller Plaza
                  New York, New York 10020
                  Attention: Mr. Henry R. Taylor
                  Facsimile number:  (212) 632-6919

                           with a copy to:

                  Gordon Altman Butowsky Weitzen
                  Shalov & Wein
                  114 West 47th Street
                  New York, New York 10036
                  Attention: Stephen E. Estroff, Esq.
                  Facsimile number:  (212) 626-0799


                                     - 69 -

<PAGE>

                  If to Purchaser:

                  COPT Acquisitions, Inc.
                  c/o Corporate Office Properties Trust
                  One Logan Square, Suite 1105
                  Philadelphia, Pennsylvania  19103
                  Attention: Clay W. Hamlin, III
                  Facsimile number:  (215) 567-1907

                           with a copy to:

                  Frank N. Tobolsky, Esq.
                  834 Chestnut Street, Suite 206
                  Philadelphia, PA  19107-5127
                  Facsimile number:  (215) 440-0198
  
                      If to Escrow Agent:

                  Commonwealth Land Title Insurance Company
                  1700 Market Street, 22nd Floor
                  Philadelphia, PA  19103
                  Attention: Gordon Daniels, Esq.
                  Facsimile number:   (215) 241-1641

Notices sent by counsel for either party shall be effective if sent in the 
manner prescribed above.

     Seller, Purchaser or Escrow Agent may designate another addressee or 
change its address for notices and other communications hereunder by a notice 
given to the other parties in the manner provided in this Section 23. A 
notice or other communication sent in compliance with the provisions of this 
Section 23 shall be deemed given and received on (i) the third (3rd) day 
following the date it is deposited in the U.S. mail, or (ii) the date it is 
delivered to the other party if sent by express mail or courier or (iii) the 
date it is telecopied and receipt is confirmed electronically by the sender's 
telecopy machine (provided a hard copy is also sent the same day as provided 
above). The inability to deliver because of a changed address of which no 
notice was given,


                                     - 70 -

<PAGE>

rejection or any refusal to accept any notice, shall be deemed to be the 
receipt of the notice, as of the date of such inability to deliver, rejection 
or refusal to accept.

     24. Property Information and Confidentiality 

     (a) Purchaser agrees that, prior to the Closing, all Property 
Information shall be kept strictly confidential and shall not, without the 
prior consent of Seller, be disclosed by Purchaser or Purchaser's 
Representatives, in any manner whatsoever, in whole or in part, and will not 
be used by Purchaser or Purchaser's Representatives, directly or indirectly, 
for any purpose other than evaluating the Premises. Moreover, Purchaser 
agrees that, prior to the Closing, the Property Information will be 
transmitted only to Purchaser's Representatives who need to know the Property 
Information for the purpose of evaluating the Premises, and who are informed 
by the Purchaser of the confidential nature of the Property Information. 
Prior to the delivery or disclosure of any Property Information to 
Purchaser's Representatives at any time prior to the Closing, Purchaser 
agrees to notify Seller as to their identity. The provisions of this Section 
24(a) shall in no event apply to Property Information which is a matter of 
public record and shall not prevent Purchaser from complying with Laws, 
including, without limitation, governmental regulatory, disclosure, tax and 
reporting requirements.


                                     - 71 -

<PAGE>

     (b) Purchaser and Seller, for the benefit of each other, hereby agree 
that between the date hereof and the Closing Date, they will not release or 
cause or permit to be released any press notices, publicity (oral or written) 
or advertising promotion relating to, or otherwise announce or disclose or 
cause or permit to be announced or disclosed, in any manner whatsoever, the 
terms, conditions or substance of this Agreement or the transactions 
contemplated herein, without first obtaining the written consent of the other 
party hereto. It is understood that the foregoing shall not preclude either 
party from discussing the substance or any relevant details of the 
transactions contemplated in this Agreement, subject to the terms of Section 
24(a), with any of its attorneys, accountants, professional consultants or 
potential lenders, as the case may be, or prevent either party hereto from 
complying with Laws, including, without limitation, governmental regulatory, 
disclosure, tax and reporting requirements.

     (c) Purchaser shall indemnify and hold Seller and Seller's Affiliates 
harmless from and against any and all claims, demands, causes of action, 
losses, damages, liabilities, costs and expenses (including, without 
limitation, attorneys' fees and disbursements) suffered or incurred by Seller 
or any of Seller's Affiliates and arising out of or in connection with a 
breach by Purchaser or Purchaser's Representatives of the provisions of this 
Section 24.


                                     - 72 -

<PAGE>

     (d) In the event this Agreement is terminated, Purchaser and Purchaser's 
Representatives shall promptly deliver to Seller all originals and copies of 
the Property Information in the possession of Purchaser and Purchaser's 
Representatives. Notwithstanding anything contained herein to the contrary, 
in no event shall Purchaser be entitled to receive a return of the 
Downpayment or the accrued interest thereon, if any, if and when otherwise 
entitled thereto pursuant to this Agreement until such time as Purchaser and 
Purchaser's Representatives shall have performed the obligations contained in 
the preceding sentence.

     (e) As used in this Agreement, the term "Property Information" shall 
mean (i) all information and documents in any way relating to the Premises, 
the operation thereof or the sale thereof (including, without limitation, 
Leases, Contracts, and Licenses) furnished to, or otherwise made available 
for review by, Purchaser or its directors, officers, employees, affiliates, 
partners, brokers, agents or other representatives, including, without 
limitation, attorneys, accountants, contractors, consultants, engineers and 
financial advisors (collectively, "Purchaser's Representatives"), by Seller 
or any of Seller's Affiliates, or their agents or representatives, including, 
without limitation, their contractors, engineers, attorneys, accountants, 
consultants, brokers or advisors, and (ii) all analyses, compilations, data, 
studies, reports or other information or documents (including, without 
limitation,


                                     - 73 -

<PAGE>

Leases, Contracts, and Licenses) prepared or obtained by Purchaser or 
Purchaser's Representatives containing or based, in whole or in part, on the 
information or documents described in the preceding clause (i), or the 
Investigations, or otherwise reflecting their review or investigation of the 
Premises.

     (f) In addition to any other remedies available to Seller, Seller shall 
have the right to seek equitable relief, including, without limitation, 
injunctive relief or specific performance, against Purchaser or Purchaser's 
Representatives in order to enforce the provisions of this Section 24 and the 
last sentence of Section 4(a)(i).                   

     (g) The provisions of this Section 24 shall survive the termination of
this Agreement and the Closing.

     25. Miscellaneous

     (a) This Agreement shall not be altered, amended, changed, waived, 
terminated or otherwise modified in any respect or particular, and no consent 
or approval required pursuant to this Agreement shall be effective, unless 
the same shall be in writing and signed by or on behalf of the party to be 
charged.

     (b) This Agreement shall be binding upon and shall inure to the benefit 
of the parties hereto and to their respective heirs, executors, 
administrators, successors and permitted assigns.

     (c)  All prior statements, understandings,


                                     - 74 -

<PAGE>

representations and agreements between the parties, oral or written, 
including, without limitation, those contained in the Confidential Offering 
Memorandum and/or the Letter of Intent, are superseded by and merged in this 
Agreement, which alone fully and completely expresses the agreement between 
them in connection with this transaction and which is entered into after full 
investigation, neither party relying upon any statement, understanding, 
representation or agreement made by the other not embodied in this Agreement. 
This Agreement shall be given a fair and reasonable construction in 
accordance with the intentions of the parties hereto, and without regard to 
or aid of canons requiring construction against Seller or the party drafting 
this Agreement.

     (d) Except as otherwise expressly provided in this Agreement, 
Purchaser's acceptance of the Deed shall be deemed a discharge of all of the 
obligations of Seller hereunder and all of Seller's representations, 
warranties, covenants and agreements herein shall merge in the documents and 
agreements executed at the Closing and shall not survive the Closing.

     (e) Purchaser agrees that it does not have and will not have any claims 
or causes of action against any disclosed or undisclosed officer, director, 
employee, trustee, shareholder, partner, principal, parent, subsidiary or 
other affiliate of Seller, including, without limitation, The Taylor Simpson 
Group and any disclosed or undisclosed officer, director, employee, trustee, 
shareholder, partner, principal, parent, subsidiary or other affiliate thereof


                                     - 75 -

<PAGE>

(collectively, "Seller's Affiliates"), arising out of or in connection with 
this Agreement or the transactions contemplated hereby, it being expressly 
agreed that Purchaser shall look solely to Seller and its assets and to the 
proceeds of the sale of the Premises, for the satisfaction of any liability 
or obligation arising under this Agreement or the transactions contemplated 
hereby, or for the performance of any of the covenants, warranties or other 
agreements contained herein, and further agrees not to sue or otherwise seek 
to enforce any personal obligation against any of Seller's Affiliates with 
respect to any matters arising out of or in connection with this Agreement or 
the transactions contemplated hereby. Without limiting the generality of the 
foregoing provisions of this Section 25(e), Purchaser hereby unconditionally 
and irrevocably waives any and all claims and causes of action of any nature 
whatsoever it may now or hereafter have against Seller's Affiliates, and 
hereby unconditionally and irrevocably releases and discharges Seller's 
Affiliates from any and all liability whatsoever which may now or hereafter 
accrue in favor of Purchaser against Seller's Affiliates, in connection with 
or arising out of this Agreement or the transactions contemplated hereby. The 
provisions of this Section 25(e) shall survive the termination of this 
Agreement and the Closing.

     (f) Purchaser agrees that, if wherever this Agreement provides that 
Purchaser must send or give any notice, make an election or take some other 
action within a


                                     - 76 -

<PAGE>

specific time period in order to exercise a right or remedy it may have
hereunder, time shall be of the essence with respect to the taking of such
action, and Purchaser's failure to take such action within the applicable time
period shall be deemed to be an irrevocable waiver by Purchaser of such right or
remedy.

     (g) No failure or delay of either party in the exercise of any right or 
remedy given to such party hereunder or the waiver by any party of any 
condition hereunder for its benefit (unless the time specified herein for 
exercise of such right or remedy has expired) shall constitute a waiver of 
any other or further right or remedy nor shall any single or partial exercise 
of any right or remedy preclude other or further exercise thereof or any 
other right or remedy. No waiver by either party of any breach hereunder or 
failure or refusal by the other party to comply with its obligations shall be 
deemed a waiver of any other or subsequent breach, failure or refusal to so 
comply.

     (h) Neither this Agreement nor any memorandum thereof shall be recorded 
and any attempted recordation hereof shall be void and shall constitute a 
default.

     (i) This Agreement may be executed in one or more counterparts, each of 
which so executed and delivered shall be deemed an original, but all of which 
taken together shall constitute but one and the same instrument.
              
     (j) Each of the exhibits and schedules referred to herein and attached 
hereto is incorporated herein by this


                                     - 77 -

<PAGE>

reference.

     (k) The caption headings in this Agreement are for convenience only and 
are not intended to be a part of this Agreement and shall not be construed to 
modify, explain or alter any of the terms, covenants or conditions herein 
contained.

     (l) This Agreement shall be interpreted and enforced in accordance with 
the laws of the state in which the Premises is located without reference to 
principles of conflicts of laws.

     (m) If any provision of this Agreement shall be unenforceable or 
invalid, the same shall not affect the remaining provisions of this Agreement 
and to this end the provisions of this Agreement are intended to be and shall 
be severable. Notwithstanding the foregoing sentence, if (i) any provision of 
this Agreement is finally determined by a court of competent jurisdiction to 
be unenforceable or invalid in whole or in part, (ii) the opportunity for all 
appeals of such determination have expired, and (iii) such unenforceability 
or invalidity alters the substance of this Agreement (taken as a whole) so as 
to deny either party, in a material way, the realization of the intended 
benefit of its bargain, such party may terminate this Agreement within thirty 
(30) days after the final determination by notice to the other. If such party 
so elects to terminate this Agreement, then this Agreement shall be 
terminated and neither party shall have any further rights, obligations or


                                     - 78 -

<PAGE>

liabilities hereunder, except as otherwise expressly provided in Sections 
4(a)(i), 14, 15, 18, 24 and 25(e), and except that Purchaser shall be 
entitled to a return of the Downpayment (together with all interest accrued 
thereon, if any).

     (n) SELLER AND PURCHASER HEREBY WAIVE TRIAL BY JURY IN ANY ACTION, 
PROCEEDING OR COUNTERCLAIM BROUGHT BY EITHER AGAINST THE OTHER ON ANY MATTER 
ARISING OUT OF OR IN ANY WAY CONNECTED WITH THIS AGREEMENT.

     (o) Seller and Purchaser agree that any time period referenced in this 
Agreement (whether for performance of an obligation, the giving of notice or 
otherwise) ending on a Saturday, Sunday or a holiday on which the U.S. Post 
Office is closed shall be extended until the next business day.

     26. ISRA

     Supplementing the provisions of Sections 10(a) and 10(b), Purchaser's 
obligation to purchase the Premises and Seller's obligation to sell the 
Premises under this Agreement shall be subject to the following condition: 
Seller shall furnish to Purchaser at or prior to the Closing either (i) a 
Letter of Non-Applicability from the New Jersey Department of Environmental 
Protection and Energy ("NJDEPE") stating the Premises are not subject to the 
Industrial Site Recovery Act and the Spill Compensation and Control Act, 
which letter Seller shall apply for within ten (10) days after execution


                                     - 79 -

<PAGE>

and delivery of this Agreement by Seller and Purchaser, or (ii) a negative 
declaration or No-Further Action Letter stating that there has been no 
discharge of hazardous substances or wastes on the site or that any such 
discharge has been cleaned up in accordance with the procedures of the NJDEPE 
and that no hazardous substances or wastes remain at the Premises. If the 
forgoing condition shall not be satisfied, Seller and Purchaser shall have as 
their sole remedy the rights described in Section 10(c). Concurrently with 
its submission thereof, Seller shall provide Purchaser with a copy of the 
application described in clause (i) above.

     27. Easements, Rights of Way, Etc.

     (a) Purchaser acknowledges that (i) after the Closing, Seller will 
remain owner of numerous parcels of land both adjacent to and in the vicinity 
of the Premises (the "Remaining Parcels") (ii) there may be situated on 
certain lots comprising the Premises various (A) water supply and/or 
treatment facilities, (B) storm and sewer facilities, (C) gas, electric and 
telephone facilities (D) storm water retention facilities, (E) drainage 
facilities or (f) other facilities (collectively, the "Facilities"), (iii) 
the Facilities are necessary for the development, use, occupancy and/or 
enjoyment of the Premises and the Remaining Parcels and are intended to be 
available for use by the owners and/or occupants of the Premises and the 
Remaining Parcels, and (iv) Seller, as owner of the Remaining Parcels, may 
require Purchaser to deliver at the Closing such easements, rights of


                                     - 80 -

<PAGE>

way or similar rights in respect of the development, use, occupancy and/or 
enjoyment of the Remaining Parcels which may benefit Remaining Parcels and 
burden all or part of the Premises.

     (b) At the Closing, Purchaser shall execute and deliver to Seller such 
drainage, slope, grading, sanitary, storm sewer, utility and other easements 
and rights of way in recordable form as may be reasonably requested in 
writing by Seller at least five (5) days prior to expiration of the Due 
Diligence Period in order for Seller to (i) use the Facilities in connection 
with the development, use, occupancy and/or enjoyment of the Remaining 
Parcels, (ii) enter upon the Premises for purposes of gaining access to the 
Facilities, (iii) to enter upon the Premises in order to gain access to 
facilities similar to the facilities which may be situated on other land, and 
(iv) to tap into the facilities at the boundaries of the Premises. The 
reasonable cost of preparation of each such easement, right of way or similar 
instrument shall be borne by Seller.


                                     - 81 -

<PAGE>


     IN WITNESS WHEREOF, this Agreement has been duly executed by the parties 
hereto as of the day and year first above written.


ATTEST:                                  SELLER:

                                         SOUTH MIDDLESEX INDUSTRIAL
                                          PARK ASSOCIATES, L.P.,Seller

                                         By:  MR Realty Associates, L.P.,
                                                  General Partner

                                         By:  Rockmid Realty, Inc.,
                                                  General Partner


                                         By:    /s/ Henry R. Taylor
- ---------------------------------           -----------------------------
         Secretary                                Henry R. Taylor,
                                                  Vice President

                                         TAX I.D. NO.: 22-2326779


                                         SM MONROE ASSOCIATES, L.P.,
                                           Seller

                                         By:  SM Associates, L.P.,
                                          General Partner

                                         By:  Monroe Realty, Inc.,
                                          General Partner


                                         By:    /s/ Henry R. Taylor
- ---------------------------------           -----------------------------
         Secretary                                Henry R. Taylor,
                                                  Vice President

                                         TAX I.D. NO.: 22-31124251


                                     - 82 -

<PAGE>


ATTEST:                                    PURCHASER:

                                           COPT ACQUISITIONS, INC.,
                                           Purchaser


                                           By:   /s/ Clay W. Hamlin, III
- ---------------------------------             -----------------------------
         Secretary                                 Clay W. Hamlin, III,
                                                    President

                                           TAX I.D. NO.: 23-2946433


- ----------------------------------
Solely for the purpose of agreeing
to the provisions of the Escrow
Joinder Agreement, annexed hereto as 
Exhibit I.


COMMONWEALTH LAND TITLE INSURANCE COMPANY

By:    /s/ M. Gordon Daniels
- ----------------------------------
      Name: M. Gordon Daniels
      Title: Vice President


                                    83



<PAGE>


                   FIRST AMENDMENT TO SALE-PURCHASE AGREEMENT

     THIS FIRST AMENDMENT TO SALE-PURCHASE AGREEMENT (this "Amendment"), dated
October 30, 1998, by and between SOUTH MIDDLESEX INDUSTRIAL PARK ASSOCIATES,
L.P., a New Jersey limited partnership ("SMIPA") and SM MONROE ASSOCIATES, L.P.,
a New Jersey limited partnership ("SMMA"), each having an office at c/o The
Taylor Simpson Group, One Rockefeller Plaza, New York, New York 10020 (SMIPA and
SMMA are, collectively, "Seller"), and COPT ACQUISITIONS, INC., a Delaware
corporation, having an office at c/o Corporate Office Properties Trust, 401 City
Avenue, Suite 615, Bala Cynwyd, Pennsylvania 19004-1126 ("Purchaser").

                              W I T N E S S E T H :

     WHEREAS, Seller and Purchaser have entered into that certain Sale-Purchase
Agreement (the "Contract"), dated as of August 20, 1998, pursuant to which
Seller agreed to sell to Purchaser and Purchaser agreed to purchase from Seller
eleven properties located in the Township of South Brunswick and the Township of
Monroe, County of Middlesex and State of New Jersey, as more particularly
described in Schedule "1" annexed to and made a part of the Contract; and

     WHEREAS, Seller and Purchaser desire to amend the terms of the Contract as
more particularly set forth below.

     NOW, THEREFORE, in consideration of the mutual covenants and conditions set
forth in the Contract and other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, Seller and Purchaser hereby agree
as follows:

     1. All capitalized terms used but not defined herein shall have the
meanings ascribed to them in the Contract.

     2. The Warehouse Properties, to wit, those properties known as 1 South
Middlesex Avenue, 21 Commerce Drive and 40 Commerce Drive, located in Middlesex
County, New Jersey, and all Land, Buildings, Personal Property and other rights
and interests of Seller in respect of the Warehouse Properties (collectively,
the "Excluded Properties") shall be excluded from the Premises which are the
subject of the sale contemplated under the Contract. In furtherance of the
foregoing (a) Schedule "1" of the Contract shall be deleted therefrom and
Schedule "1" annexed hereto (with the metes and bounds descriptions therefor)
shall be inserted in lieu thereof and (b) wherever the term "Individual
Properties" appears in the Contract, it shall mean the Office Properties and the
Flex Properties, exclusive of the Warehouse Properties.

     3. Section 4(a) of the Contract shall be amended as follows:

        (a) the Due Diligence Period, as described in clause (i), is hereby
terminated; and

        (b) Purchaser's right to terminate the Contract during the Due
Diligence Period is void and of no further effect.


<PAGE>

     4. (a) Section 4(b) of the Contract shall be amended so that the Closing
Date shall be 10:00 a.m. on Thursday, October 30, 1998. All other provisions of
Section 4(b) shall be applicable to the Closing Date.

        (b) Concurrently upon the execution and delivery of this Amendment by 
and between Seller and Purchaser, Purchaser shall deliver to the Escrow Agent 
the amount of ONE MILLION AND 00/100 ($1,000,000) DOLLARS (the "Supplemental 
Downpayment"), by a bank wire transfer, intrabank transfer, or other 
electronic transfer of immediately available funds to an account designated 
by Escrow Agent, which amount shall be held in escrow by Escrow Agent in the 
same manner as the Downpayment is required to be held under the Contract and 
shall be deemed to be part of such Downpayment. Purchaser shall cause Escrow 
Agent to send Seller written notice via telecopier confirming receipt of the 
Supplemental Downpayment. If (x) the Supplemental Downpayment is not paid by 
Purchaser to the Escrow Agent as aforesaid or (y) such notice is not received 
by Seller within two (2) business days after the execution and delivery of 
this Agreement, Seller may terminate this Agreement effective upon the 
sending of notice to Purchaser by telecopier (notwithstanding the notice 
provisions of Section 23) or as otherwise provided in Section 23, whereupon 
the Downpayment, and Supplemental Downpayment (if Purchaser shall have 
delivered the Downpayment and Supplemental Downpayment to Escrow Agent), 
shall be returned to Purchaser. Notwithstanding the foregoing provisions of 
this Paragraph 4(b), the termination right of Seller set forth in the 
immediately preceding sentence, and Purchaser's obligation to deliver the 
Supplemental Downpayment, shall be void and of no effect if the Closing shall 
occur during the two (2) business day period referenced in such sentence. If 
the Closing shall occur, Seller shall be entitled to receive the Downpayment 
and Supplemental Downpayment, and all interest accrued thereon, if any, and 
such interest shall be credited against the portion of the Purchase Price 
payable pursuant to Section 2(b) of the Contract.

     5. Section 2 of the Contract shall be amended so that the Purchase Price
shall be THIRTY-ONE MILLION TWO HUNDRED FIFTY THOUSAND AND 00/100
($31,250,000.00) DOLLARS, subject to adjustment as provided herein and in the
Contract.

     6. (a) At Closing, Seller shall deliver to Purchaser a lease agreement in
the form annexed hereto as Exhibit "A" (the "Substitute Lease") pursuant to
which Seller shall lease from Purchaser certain premises to be designated by
Purchaser on the second floor of 104 Interchange Plaza (the "Substitute Space"),
which lease shall provide, inter alia, as follows: (i) upon delivery of the
lease to Purchaser, Seller shall deposit with Purchaser the aggregate amount of
$268,521 which shall be held by Purchaser as security in respect of the
obligation to pay base rent under the Substitute Lease; (ii) Purchaser, as
landlord under the Substitute Lease, shall be entitled to draw upon said
security in equal monthly installments on the first (1st) of each month during
the nine (9) month period immediately following the Closing (it being understood
that if the Closing occurs on a date other than the first (1st) of the month
Purchaser shall be entitled to draw a pro rated amount at the Closing in respect
of the remaining portion of the month in which the Closing occurs); (iii) except
for such right to draw upon such security as set forth in the preceding clause
(ii), Purchaser shall have no right to receive from Seller, and Seller shall
have no obligation to pay Purchaser, any payment of base rent, additional rent
or any other amount whatsoever (other than as expressly set forth in the
parenthetical exception in clause (vi) below) in respect of the Substitute Lease
or the Substitute Space, it being expressly agreed that Seller's sole obligation
(other than as expressly set forth in the 


                                       2
<PAGE>

parenthetical exception in clause (vi) below) in respect of the Substitute Space
and the Substitute Lease shall be to deposit the security with Purchaser as
described in clause (i) above; (iv) the Substitute Lease shall expire and be of
no further force and effect upon the earlier of (x) nine (9) months from the
date thereof, or (y) the effective date of termination of the Substitute Lease
as set forth in written notice from Purchaser to Seller, or (z) at such time as
Purchaser shall receive the aggregate amount of $268,521 from Seller, or from
any party which now is or hereafter becomes obligated to pay rent in respect of
the Substitute Space (or any of such party's affiliates), in respect of base
rent attributable to the Substitute Space during the remaining term of the
Substitute Lease; (v) Purchaser shall obtain and maintain during the term of the
Temporary Lease, comprehensive general liability insurance in the amount of at
least $5,000,000 combined single limit per occurrence and in the aggregate
naming Seller as additional insured; and (vi) Purchaser shall indemnify Seller
for any and all liability whatsoever (including, without limitation, reasonable
attorneys fees and disbursements) which Seller may incur in respect of the
Substitute Space and the Substitute Lease after the Closing (except to the
extent caused by Seller at the Premises during its possession thereof), it being
understood and agreed that the delivery of the Substitute Lease by Seller to
Purchaser is an accommodation to Purchaser and that the parties intend that
Seller shall have no liability whatsoever in connection therewith except for the
payment of security as aforesaid; and (vii) if, upon the expiration or
termination of the Substitute Lease, there shall be any remaining security held
by Purchaser under the Substitute Lease, it shall remit same to Seller within
ten (10) days after such expiration or termination. The provisions of this
paragraph 6(a) shall survive the Closing.

        (b) At Closing, Seller shall deliver to Purchaser a lease agreement in 
the form annexed hereto as Exhibit "B" (the "SSI Lease") pursuant to which 
Seller shall lease from Purchaser certain premises located at, on or 
proximate to 47 Commerce Drive to be designated by Purchaser (the "SSI 
Space"), which lease shall provide, inter alia, as follows: (i) upon delivery 
of the lease to Purchaser, Seller shall deposit with Purchaser the aggregate 
amount of $81,386 which shall be held by Purchaser as security in respect of 
the obligation to pay rent under the SSI Lease; (ii) Purchaser, as landlord 
under the SSI Lease, shall be entitled to draw upon said security in equal 
monthly installments on the first (1st) of each month during the twelve (12) 
month period immediately following the Closing (it being understood that if 
the Closing occurs on a date other than the first (1st) of the month 
Purchaser shall be entitled to draw a pro rated amount at the Closing in 
respect of the remaining portion of the month in which the Closing occurs); 
(iii) except for such right to draw upon such security as set forth in the 
preceding clause (ii), Purchaser shall have no right to receive from Seller, 
and Seller shall have no obligation to pay Purchaser, any payment of base 
rent, additional rent or any other amount whatsoever (other than as expressly 
set forth in the parenthetical exception in clause (vi) below) in respect of 
the SSI Lease or the SSI Space, it being expressly agreed that Seller's sole 
obligation (other than as expressly set forth in the parenthetical exception 
in clause (vi) below) in respect of the SSI Space and the SSI Lease shall be 
to deposit the security with Purchaser as described in clause (i) above; (iv) 
the SSI Lease shall expire and be of no further force and effect upon the 
earlier of (x) twelve (12) months from the date thereof, or (y) the effective 
date of termination of the SSI Lease as set forth in written notice from 
Purchaser to Seller, or (z) at such time as Purchaser shall receive, from 
Somfy Systems, Inc. the first payment of increased base rent resulting from 
the expansion of its premises pursuant to Amendment No. 2 dated March 1, 
1998; (v) Purchaser shall obtain and maintain during the term of the 
Temporary Lease, comprehensive general liability insurance in the amount of 
at least $5,000,000 combined single limit per occurrence and in the aggregate 
naming Seller as additional insured; and (vi) Purchaser shall indemnify 
Seller for any and 


                                       3
<PAGE>

all liability whatsoever (including, without limitation, reasonable attorneys 
fees and disbursements) which Seller may incur in respect of the SSI Space 
and the SSI Lease after the Closing (except to the extent caused by Seller at 
the Premises during its possession thereof), it being understood and agreed 
that the delivery of the SSI Lease by Seller to Purchaser is an accommodation 
to Purchaser and that the parties intend that Seller shall have no liability 
whatsoever in connection therewith except for the payment of security as 
aforesaid; and (vii) if, upon the expiration or termination of the SSI Lease, 
there shall be any remaining security held by Purchaser under the SSI Lease, 
it shall remit same to Seller within ten (10) days after such expiration or 
termination. The provisions of this paragraph 6(b) shall survive the Closing.

     7. The Acceptable Agreements referenced in Section 11(c) of the Contract,
being those Contracts which Seller shall assign to Purchaser and which Purchaser
shall assume at the Closing pursuant to Assignment and Assumption of Licenses
and Acceptable Agreements, are listed in Schedule "2" annexed hereto.

     8. In no event shall Purchaser or any of its agents, employees or
contractors, or any person or entity affiliated in any manner with any of the
foregoing, be permitted at any time after the Closing to derive any income from
any use of the name "CenterPoint at 8A", it being understood that such name is
and shall remain the sole property of Seller and Seller shall suffer irreparable
harm in connection with any such use. The foregoing shall not preclude Purchaser
from using, free of charge, the name "CenterPoint at 8A" in describing the
location of the Premises (i) on letterhead or in any other business materials
used by Purchaser; or (ii) in marketing or promotional materials in respect of
the Premises (including, without limitation, such materials as may be given to
prospective tenants and purchasers of the Premises). The provisions of this
Paragraph 8 shall survive the Closing.

     9. (a) At the Closing, Seller shall deliver to and deposit with the Title
Company, as escrow agent (the Title Company, in its capacity as escrow agent
hereunder, is hereinafter referred to as the "Escrow Agent"), the following sums
(the "Escrowed Funds"), which amounts shall be segregated and maintained by the
Escrow Agent in separate accounts:

            (i) ONE MILLION THREE HUNDRED THOUSAND AND 00/100 ($1,300,000.00)
                DOLLARS, in respect of costs and expenses (including, without
                limitation, all hard and soft costs relating to construction,
                all commissions and other compensation due to brokers or others
                and all legal, architectural, engineering and other professional
                costs) (collectively, the "Somfy Costs") associated with the
                proposed expansion of 47 Commerce Drive which is currently
                occupied by Somfy Systems, Inc. ("SSI"), as referred to in
                Schedule "9" of the Contract (the "Somfy Expansion"), which sum
                shall be held by the Escrow Agent in accordance with the terms
                of the Escrow Joinder among Seller, Purchaser and Escrow Agent
                annexed hereto and made a part hereof as Exhibit "C." Purchaser
                shall maintain reasonably detailed books and records with
                respect to all monies expended by Purchaser in connection with
                the Somfy Expansion so that the amount and nature of all of such
                expenditures are readily identifiable. Seller shall be entitled
                to inspect such books and records


                                       4
<PAGE>

               of Purchaser in the manner prescribed by Section 22(a) of the
               Contract. It is expressly agreed that Seller shall have no
               obligation or liability whatsoever for any Somfy Costs incurred
               at any time by Purchaser or any of Purchaser's affiliates,
               agents, employees, contractors and/or subcontractors, whether or
               not the Somfy Costs shall exceed the amount set forth above in
               this clause (i), it being further expressly agreed that Purchaser
               shall be solely responsible for the Somfy Expansion and all Somfy
               Costs of whatever nature and whenever incurred and that Purchaser
               shall and does indemnify and hold harmless Seller from and
               against all liability arising out of the acts or omissions of
               Purchaser, it agents, employees, contractors or affiliates in
               respect of the Somfy Expansion and the Somfy Costs. Within five
               (5) business days after Seller's written request therefor,
               Purchaser shall give Seller written notice as to (x) whether or
               not SSI has taken occupancy of all or part of the expanded space
               which is the subject of the Somfy Expansion, and/or (y) the date
               of substantial completion of the Somfy Expansion. In no event
               shall Purchaser use any of the funds referenced in this clause
               (i) to pay Somfy Costs to any party which is an affiliate of
               Purchaser except to the extent the amount payable to such party
               does not exceed the reasonable and customary charges in the
               industry for the work or materials in question.

          (ii) ONE HUNDRED SIXTY-EIGHT THOUSAND FIVE HUNDRED NINETY SEVEN AND
               00/100 ($168,597.00) DOLLARS, in respect of the obligation on the
               part of Matrix Realty, Inc. ("Matrix") to pay base rent pursuant
               to a certain Lease Agreement between SMIPA, as lessor, and
               Matrix, as lessee (the "Matrix Lease"), for certain premises
               located at 3 Centre Drive, which sum shall be held by the Escrow
               Agent in accordance with the terms of the Escrow Joinder among
               Seller, Purchaser and Escrow Agent annexed hereto and made a part
               hereof as Exhibit "D."

         (iii) ONE HUNDRED FIFTEEN THOUSAND AND 00/100 ($115,000.00) DOLLARS in
               respect of certain discrepancies in the calculation of closing
               adjustments pertaining to (A) security deposits, (B) operating
               expense escalation payments under Leases and (C) prepaid rents,
               which discrepancies the parties intend to resolve in good faith,
               with appropriate payments out of such funds to be made to Seller
               or Purchaser, as the case may be, within sixty (60) days from the
               Closing. The foregoing sum shall be held by the Escrow Agent in
               accordance with the terms of the Escrow Joinder among Seller,
               Purchaser and Escrow Agent annexed hereto and made a part hereof
               as Exhibit "J".


                                       5
<PAGE>

        (b) The Escrowed Funds shall be allocated and funded from the 
Purchase Price and shall be delivered to the Escrow Agent at the Closing and 
maintained in interest bearing accounts or money market funds in Jefferson 
Bank, Philadelphia, Pennsylvania in which the principal balances do not 
fluctuate in value, it being expressly understood that Purchaser shall be 
solely responsible to replace promptly any portion of the principals of any 
of the Escrowed Funds which are reduced due to investment loss or otherwise.

        (c) The provisions of this Paragraph 9 and Exhibits C and D shall
survive the Closing.

    10. Section 26 of the Contract is hereby deleted in its entirety.

    11. Purchaser shall have no obligation to deliver at the Closing any such
easements as are described in Section 27(b) of the Contract.

    12. (a) Seller shall deliver to the Title Company at the Closing a title
affidavit in the form annexed hereto as Exhibit "E".

        (b) Seller shall deliver to Purchaser at the Closing a letter from
Bollerman Real Estate Services in the form annexed hereto as Exhibit "G".

    13. At the Closing, Seller shall deliver to Purchaser, to the extent in
Seller's possession and control and not located at the Premises, (a) the form
lease used by Seller at the Premises (both in hard paper copy and on computer
disk) and (b) Seller's management records located at the Premises with respect
to the billing of rent and additional rent to tenants at the Premises,
including, without limitation, (i) annual reconciliation of estimated additional
rent charges for 1997; (ii) the latest available year-to-date expense statements
for the Individual Properties; and (iii) property management budgets for the
Individual Properties for each of 1997 and 1998.

    14. Section 3(h) of the Contract shall be amended as follows:

        (a) by amending and restating the first sentence of clause (i) 
thereof to read as follows: "Seller shall be responsible for all commissions 
pertaining to Leases entered into prior to the Closing without regard to 
whether the same shall be payable before or after the Closing.";

        (b) by adding the following at the end of clause (i): "At the 
Closing, Seller shall furnish to Purchaser evidence of payment of all 
commissions for which Seller is responsible under this clause (i).";

        (c) Section 3(h)(ii) shall be deleted and the following shall be
inserted in lieu thereof:

            "With respect to Leases, Purchaser shall be responsible for (1)
            the payment of the entire amount of those leasing commissions (x)
            that accrue and become due and owing subsequent to Closing and
            (y) which are required to be paid by the owner pursuant to the
            commission agreements specifically listed on Exhibit "F" attached


                                       6
<PAGE>

            hereto and (2) the payment of leasing commissions other than
            those payable pursuant to such agreements with respect to Leases
            to the extent such other leasing commissions (A) accrue and
            become due and owing subsequent to the Closing and (B) do not
            exceed five (5%) percent of the total base rent due under any
            particular lease in question, it being agreed that any such
            commissions in excess of such amount shall be the sole
            responsibility of Seller, which obligation shall survive the
            Closing. The foregoing provision of this Paragraph 3(h)(ii) shall
            be without limitation to Seller's obligations under Paragraph
            3(h)(i). Purchaser agrees to indemnify and hold Seller and
            Seller's Affiliates harmless from any and all claims, demands,
            causes of action, losses, damages, liabilities, and costs and
            expenses (including, without limitation, reasonable attorney's
            fees and disbursements), suffered or incurred by Seller or any of
            Seller's Affiliates arising out of or in connection with claims
            for any commissions which are Purchaser's responsibility to pay
            under this Paragraph 3(h)(ii)."; and

        (d) The following shall be added as new Section 3(h)(iii):

            "(iii) The provisions of this Paragraph 3(h) shall survive the
            Closing."

    15. Section 10(a) of the Contract shall be amended by adding the following
clauses (v) and (vi):

        "(v) Seller shall execute and deliver to Purchaser an easement, in the
    form annexed hereto as Exhibit "H", granting Purchaser, as owner of 101
    Interchange Plaza (Master Plan Parcel 24), the right to use the existing
    sanitary sewer line, if any, located on Master Plan Parcel 35 (Block 8.01;
    Lot 3.012).

        "(vi) Seller shall execute and deliver to Purchaser an easement, in
    the form annexed hereto as Exhibit "I", granting Purchaser, as owner of 104
    Interchange Plaza (Master Plan Parcel 34), the right to drain water into
    that certain fifty foot drainage easement located on Master Plan Parcel 25
    (Block 8; Lot 3.013).

    16. To the extent that Seller or any of its affiliates, under a recorded
Deed of Declaration Protective Covenants (or deed restriction, restrictive
covenant, or other like instrument) affecting the Premises, has the right
pursuant thereto to approve any matter affecting the Premises from and after the
Closing during the period of Purchaser's ownership thereof, Seller shall render
its approval or disapproval in good faith and on a reasonable basis in the
context of the overall development of the properties affected by such Deed of
Declaration Protective Covenants (or deed restriction, restrictive covenant, or
other like instrument) including, without limitation, the development of such
properties which are owned by Seller and or its affiliates.

    17. In the event of any conflict or inconsistency between any provision of
the Contract and any provision of this Amendment, the provisions of this
Amendment shall govern and control.


                                       7
<PAGE>

    18. Except as amended hereby, the Contract is hereby reinstated and
affirmed and shall continue unmodified and in full force and effect.

    IN WITNESS WHEREOF, this Amendment has been duly executed by the parties
hereto as of the day and year first above written.


ATTEST:                                  SELLER:


                                         SOUTH MIDDLESEX INDUSTRIAL
                                          PARK ASSOCIATES, L.P.

                                         By:      MR Realty Associates, L.P.,
                                                  General Partner

                                         By:      Rockmid Realty, Inc.,
                                                  General Partner

                                         By: /s/ Henry R. Taylor
- ----------------------------                -------------------------
         Secretary                          Henry R. Taylor,
                                            Vice President


                                         SM MONROE ASSOCIATES, L.P.

                                         By:      SM Associates, L.P.,
                                                  General Partner

                                         By:      Monroe Realty, Inc.,
                                                  General Partner


                                         By: /s/ Henry R. Taylor
- ----------------------------                -------------------------
         Secretary                          Henry R. Taylor,
                                            Vice President


                                      8
<PAGE>


ATTEST:                                  PURCHASER:


                                         COPT ACQUISITIONS, INC.,
                                         Purchaser

                                         By:
- ----------------------------                -------------------------
         Secretary                          Clay W. Hamlin, III,
                                            President


Solely for the purpose of agreeing to
Section 9 of this Amendment and the
provisions of the Escrow Joinder
Agreements, annexed hereto as Exhibits C
and D.



COMMONWEALTH LAND TITLE INSURANCE COMPANY


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


                                       9


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