Document:

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                               FIRST AMENDMENT TO
                    FIRST AMENDED AND RESTATED 1994 EMPLOYEE
                 RESTRICTED STOCK AND  RESTRICTED UNIT PLAN OF
                   CHARLES E. SMITH RESIDENTIAL REALTY, INC.

     THIS FIRST AMENDMENT TO FIRST AMENDED AND RESTATED 1994 EMPLOYEE RESTRICTED
STOCK AND RESTRICTED UNIT PLAN, dated as of October 25, 1999, is entered into by
and among Charles E. Smith Residential Realty, Inc., a Maryland corporation, for
itself and as general partner of Charles E. Smith Residential Realty L.P.
(together the "Company"), and Smith Realty Company, Consolidated Engineering
Services, Inc., and Smith Management Construction, Inc. (collectively, the
"Operating Subsidiaries").

     WHEREAS, the 1994 Employee Restricted Stock and Restricted Unit Plan (the
"Plan") was duly adopted by the Board of Directors of Charles E. Smith
Residential Realty, Inc., on June 13, 1994, by the stockholders of Charles E.
Smith Residential Realty, Inc., on June 17, 1994, by the Board of Directors of
Charles E. Smith Residential Realty, Inc., acting in its capacity as the general
partner of Charles E. Smith Residential Realty L.P. on June 13, 1994, by the
partners of Charles E. Smith Residential Realty L.P. on June 17, 1994, and by
the Boards of Directors of the Operating Subsidiaries on June 23, 1994,  and the
Plan, together with the 1994 Employee Stock and Unit Option Plan and Directors
Stock Option Plan, was incorporated in a filing on Form S-8 with the Securities
and Exchange Commission (the "SEC"), which became effective on August 8, 1994;

     WHEREAS, the Company did adopt the Plan for the benefit of their employees
and the employees of Smith Realty Company (formerly Smith Property Management,
Inc.), Consolidated Engineering Services, Inc., and Smith Management
Construction, Inc.;

     WHEREAS, the Board of Directors believes that it would be in the best
interests of the Company to amend Sections 2.11, 3.1, 3.2 and 10.2 of the Plan
to revise the method by which the value of each share of Stock (as defined in
the Plan) subject to the Plan is determined and to facilitate the administration
of the Plan; and

     WHEREAS, the Board of Directors of the Company did approve such amendments
at a meeting of the Board of Directors held on October 25, 1999.

     NOW, THEREFORE, in consideration of the premises herein set forth and other
good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto hereby amend the Plan, as follows:

     1.  Section 2.11 of the Plan is hereby amended so that the first sentence
of Section 2.11 shall read as follows:

          "2.11  'Fair Market Value' means the value of each share of Stock
       subject to the Plan determined as follows: if on the Grant Date or other

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       determination date the shares of Stock are listed on an established
       national or regional stock exchange, are admitted to quotation on the
       National Association of Securities Dealers Automated Quotation System, or
       are publicly traded on an established securities market, the Fair Market
       Value of the shares of Stock shall be the closing price of the shares of
       Stock on such exchange or in such market (the highest such closing price
       if there is more than one exchange or market) on the Grant Date (or, if
       the Grant Date is not a trading day, the trading day immediately
       preceding the Grant Date) or such other determination date (or if there
       is no such reported closing price, the Fair Market Value shall be the
       mean between the highest bid and lowest asked prices or between the high
       and low sales prices on the Grant Date or such preceding trading day) or,
       if no sale of the shares of Stock is reported for the Grant Date or such
       preceding trading day, on the next preceding day on which any sale shall
       have been reported."

     2.  Section 3.1 of the Plan is hereby amended by deleting the second
sentence of Section 3.1 in its entirety, so that such Section 3.1 now reads as
follows:

          "3.1  Company Plan.  The Company Plan shall be administered by the
                ------------
       Company Committee.  The Company Committee shall have such powers and
       authorities related to the administration of the Company Plan as are
       consistent with the Company's articles of incorporation and by-laws and
       with applicable law.  The Company Committee shall have the full power and
       authority (subject to any restrictions imposed by the Board of Directors
       of the Company, the Company's articles of incorporation or by-laws or
       applicable law) to take all actions and to make all determinations
       required or provided for under the Company Plan, any Incentive Award
       granted by the Company Committee under the Company Plan and any Agreement
       entered into in connection therewith and shall have the full power and
       authority to take all such other actions and determinations not
       inconsistent with the specific terms and provisions of the Company Plan
       that the Company Committee deems to be necessary or appropriate to the
       administration of the Company Plan, any Incentive Award granted by the
       Company Committee under the Company Plan and any Agreement entered into
       in connection therewith.  The interpretation and construction by the
       Company Committee of any provision of the Company Plan, any Incentive
       Award granted by the Company Committee under the Company Plan and any
       Agreement entered into in connection therewith shall be final and
       conclusive with respect to the Holder."

     3.  Section 3.2 of the Plan is hereby amended by deleting the second
sentence of Section 3.2 in its entirety, so that such Section 3.2 now reads as
follows:

          "3.2  Operating Partnership Plan.  The Operating Partnership Plan
                --------------------------
       shall be administered by the Company Committee.  The Company Committee
       shall have the full power and authority (subject to any restrictions
       imposed
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       on such Committee by Section 3.1 hereof) to take all actions and to make
       all determinations required or provided for under the Operating
       Partnership Plan, any Incentive Award granted by the Company Committee
       under the Operating Partnership Plan and any Agreement entered into in
       connection therewith and shall have the full power and authority to take
       all such other actions and determinations not inconsistent with the
       specific terms and provisions of the Operating Partnership Plan that the
       Company Committee deems to be necessary or appropriate to the
       administration of the Operating Partnership Plan, any Incentive Award
       granted by the Company Committee under the Operating Partnership Plan and
       any Agreement entered into in connection therewith. The interpretation
       and construction by the Company Committee of any provision of the
       Operating Partnership Plan, any Incentive Award granted by the Company
       Committee under the Operating Partnership Plan and any Agreement entered
       into in connection therewith shall be final and conclusive with respect
       to the Holder."

     4.   Section 10.2 of the Plan is hereby amended by amending Section 15.2 to
read as follows:

          "10.2  Rule 16b-3.  To the extent any action by the Plan
                 ----------
       administrators does not comply with the requirements of Rule 16b-3, it
       shall be deemed inoperative, to the extent permitted by law and deemed
       advisable by the Plan administrators, and shall not affect the validity
       of the Plan.  In the event Rule 16b-3 is revised or replaced, the Board
       of Directors of the Company may exercise discretion to modify this Plan
       in any respect necessary to satisfy the requirements of the revised
       exemption or its replacement."

     5.   All capitalized terms used in this First Amendment and not otherwise
defined shall have the meanings assigned to them in the Plan. Except as modified
herein, all terms and conditions of the Plan shall remain in full force and
effect, which terms and conditions the parties hereto ratify and affirm.

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     IN WITNESS WHEREOF, the undersigned have executed this FIRST AMENDMENT TO
FIRST AMENDED AND RESTATED 1994 EMPLOYEE RESTRICTED STOCK AND RESTRICTED UNIT
PLAN as of the date first above written.

                         CHARLES E. SMITH RESIDENTIAL REALTY, INC., for itself
                         and as general partner of Charles E. Smith Residential
                         Realty L.P.

                         BY:  /s/ Ernest A. Gerardi, Jr.
                             -----------------------------------------
                             Ernest A. Gerardi, Jr., President

This First Amendment to the Plan was duly adopted and approved by the Board of
Directors of the Company at a meeting of the Board of Directors held on October
25, 1999.

                           /s/ Robert D. Zimet
                          ------------------------------------------
                          Robert D. Zimet
                          Secretary of the Company<PAGE>

                              FOURTH AMENDMENT TO
                   FIRST AMENDED AND RESTATED 1994 EMPLOYEE
                         STOCK AND UNIT OPTION PLAN OF
                   CHARLES E. SMITH RESIDENTIAL REALTY, INC.

     THIS FOURTH AMENDMENT TO FIRST AMENDED AND RESTATED 1994 EMPLOYEE STOCK AND
UNIT OPTION PLAN, dated as of January 25, 2000, is adopted by Charles E. Smith
Residential Realty, Inc., a Maryland corporation, for itself and as general
partner of Charles E. Smith Residential Realty L.P. (together, the "Company"),
and Smith Realty Company, Consolidated Engineering Services, Inc., and Smith
Management Construction, Inc. (collectively, the "Operating Subsidiaries").

     WHEREAS, the 1994 Employee Stock and Unit Option Plan (the "Plan") was
approved by the Board of Directors of Charles E. Smith Residential Realty, Inc.,
for itself and as a general partner of Charles E. Smith Residential Realty L.P.,
by unanimous written consents dated May 25, 1994, June 13, 1994, June 22, 1994,
and June 23, 1994, and at a meeting held on July 26, 1994, by the shareholders
of Charles E. Smith Residential Realty, Inc., by unanimous written consents
dated June 17, 1994, June 22, 1994, and June 23, 1994, and by the partners of
Charles E. Smith Residential Realty L.P. by unanimous written consents dated
June 17, 1994, and June 23, 1994, and the Plan, together with the 1994 Employee
Restricted Stock and Restricted Unit Plan and Directors Stock Option Plan, was
incorporated in a filing on Form S-8 with the Securities and Exchange Commission
(the "SEC"), which became effective on August 8, 1994;

     WHEREAS, the Board of Directors of the Company duly adopted and approved
(i) the First Amended and Restated 1994 Employee Stock and Unit Option Plan on
November 8, 1994, which was incorporated in a filing on Form 10-K for the year
ended December 31, 1994 and filed with the SEC on March 31, 1995, (ii) the First
Amendment thereto dated as of May 7, 1998, which was incorporated in a filing on
Form S-8 and filed with the SEC on November 17, 1998, (iii) the Second Amendment
thereto dated as of March 1, 1999; and (iv) the Third Amendment thereto dated as
of October 25, 1999;

     WHEREAS, the Company and its stockholders did adopt the Plan for the
benefit of their employees and the employees of Smith Realty Company (formerly
Smith Property Management, Inc.), Consolidated Engineering Services, Inc., and
Smith Management Construction, Inc.;

     WHEREAS, the Board of Directors believes that it would be in the best
interests of the Company to increase the number of available option grants to
permit the continuation of this incentive program and to accommodate newly-hired
employees;

     WHEREAS, the Board of Directors of the Company, at its regular meeting on
January 25, 2000, approved a resolution increasing the number of shares or Units
available under the Plan as set forth below.

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     NOW, THEREFORE, in consideration of the premises herein set forth and other
good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto hereby amend the Plan, as follows:

     1.   Section 4 of the Plan is hereby amended and restated in its entirety
as follows:

          "The shares of Stock that may be issued pursuant to Incentive Awards
       may be (i) issued and outstanding shares of Stock or Units, (ii) treasury
       shares of Stock or Units (to the extent permitted by applicable law), or
       (iii) authorized but unissued shares.  The number of shares of Stock and
       Units that may be issued pursuant to Incentive Awards under the Plan
       shall not exceed a combined 4,650,000 shares of Stock and Units.  The
       Board of Directors of the Company shall determine how many shares of
       Stock and Units may be issued pursuant to the Incentive Awards to
       employees of Operating Subsidiaries.  If any Incentive Award expires,
       terminates, or is terminated or canceled for any reason prior to exercise
       or vesting in full, the shares or Units that were subject to the
       unexercised, forfeited, or terminated portion of such Incentive Award
       shall be available immediately for future grants by the Granting Employer
       with respect thereto (subject to Section 12 hereof) of Incentive Awards
       under the Plan."

     2.   All capitalized terms used in this Fourth Amendment and not otherwise
defined shall have the meanings assigned to them in the Plan. Except as modified
herein, all terms and conditions of the Plan shall remain in full force and
effect, which terms and conditions the parties hereto ratify and affirm.

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     IN WITNESS WHEREOF, the undersigned have executed this FOURTH AMENDMENT TO
FIRST AMENDED AND RESTATED 1994 EMPLOYEE STOCK AND UNIT OPTION PLAN as of the
date first above written.

                                CHARLES E. SMITH RESIDENTIAL REALTY, INC., for
                                itself and as general partner of Charles E.
                                Smith Residential Realty L.P.

                                BY: /s/ Ernest A. Gerardi, Jr.
                                   ---------------------------
                                   Ernest A. Gerardi, Jr., President

This Fourth Amendment to the Plan was duly adopted and approved by the Board of
Directors of the Company at a meeting of the Board of Directors held on January
25, 2000.

                              /s/ Robert D. Zimet
                              ----------------------
                              Robert D. Zimet
                              Secretary of the Company

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