================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

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

                                 SCHEDULE 13D/A
             INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
            TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO
                                   RULE 13d-2

                               (AMENDMENT NO. 18)

                         CarrAmerica Realty Corporation
                    (Formerly Named Carr Realty Corporation)

                                (Name of Issuer)

                          Common Stock, $.01 Par Value
           ----------------------------------------------------------
                         (Title of Class of Securities)


                                   144418 10 0
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                           Jeffrey A. Klopf, Secretary
                       Security Capital Group Incorporated
                               125 Lincoln Avenue
                           Santa Fe, New Mexico 87501
                                 (505) 982-9292
           ----------------------------------------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)


                                November 15, 2001
           ----------------------------------------------------------
             (Date of Event Which Requires Filing of This Statement)


If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following
box:|_|.

                         (Continued on following pages)
                              (Page 1 of 10 Pages)
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                                  SCHEDULE 13D

 -------------------------                           -----------------
 | CUSIP No. 861907 10 3 |                           |  Page 2 of 10 |
 -------------------------                           -----------------


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

1.       NAMES OF REPORTING PERSONS
                  Security Capital Group Incorporated
         I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
                  36-3692698

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

2.       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP             _
                                                                 (a) |_|
                                                                      _
                                                                 (b) |_|
--------------------------------------------------------------------------------

3.       SEC USE ONLY

--------------------------------------------------------------------------------
4.       SOURCE OF FUNDS

         BK, OO
--------------------------------------------------------------------------------

5.       CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
         PURSUANT TO ITEMS 2(d) OR 2(e)                               _
                                                                     |_|
--------------------------------------------------------------------------------

6.       CITIZENSHIP OR PLACE OF ORGANIZATION

         Maryland
--------------------------------------------------------------------------------
    Number of    |     |     7.  SOLE VOTING POWER
                 |     |
      Shares     |     |          28,603,417
                 |--------------------------------------------------------------
   Beneficially  |     |     8.  SHARED VOTING POWER
                 |     |
     Owned By    |     |          -0-
                 |--------------------------------------------------------------
       Each      |     |     9.  SOLE DISPOSITIVE POWER
                 |     |
    Reporting    |     |          28,603,417
                 |-------------------------------------------------------------
   Person With   |     |     10.  SHARED DISPOSITIVE POWER
                 |     |
                 |     |          -0-
--------------------------------------------------------------------------------
11.      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
         28,603,417

--------------------------------------------------------------------------------
12.      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
         CERTAIN SHARES                                               _
                                                                     |_|
--------------------------------------------------------------------------------
13.      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
         45.7%

--------------------------------------------------------------------------------
14.      TYPE OF REPORTING PERSON REPORTING

         CO
--------------------------------------------------------------------------------






                                  SCHEDULE 13D

 -------------------------                           -----------------
 | CUSIP No. 861907 10 3 |                           |  Page 3 of 10 |
 -------------------------                           -----------------


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

1.       NAMES OF REPORTING PERSONS
                  SC Capital Incorporated
         I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
                  74-2985638

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

2.       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP             _
                                                                 (a) |_|
                                                                      _
                                                                 (b) |_|
--------------------------------------------------------------------------------

3.       SEC USE ONLY

--------------------------------------------------------------------------------
4.       SOURCE OF FUNDS

         BK, OO
--------------------------------------------------------------------------------

5.       CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
         PURSUANT TO ITEMS 2(d) OR 2(e)                               _
                                                                     |_|
--------------------------------------------------------------------------------

6.       CITIZENSHIP OR PLACE OF ORGANIZATION

         Nevada
--------------------------------------------------------------------------------
    Number of    |     |     7.  SOLE VOTING POWER
                 |     |
      Shares     |     |          28,603,417
                 |--------------------------------------------------------------
   Beneficially  |     |     8.  SHARED VOTING POWER
                 |     |
     Owned By    |     |          -0-
                 |--------------------------------------------------------------
       Each      |     |     9.  SOLE DISPOSITIVE POWER
                 |     |
    Reporting    |     |          28,603,417
                 |--------------------------------------------------------------
   Person With   |     |     10.  SHARED DISPOSITIVE POWER
                 |     |
                 |     |          -0-
--------------------------------------------------------------------------------
11.      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
         28,603,417

--------------------------------------------------------------------------------
12.      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
         CERTAIN SHARES                                               _
                                                                     |_|
--------------------------------------------------------------------------------
13.      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
         45.7%

--------------------------------------------------------------------------------
14.      TYPE OF REPORTING PERSON REPORTING

         CO
--------------------------------------------------------------------------------




                                  SCHEDULE 13D

 -------------------------                           -----------------
 | CUSIP No. 861907 10 3 |                           |  Page 4 of 10 |
 -------------------------                           -----------------


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

1.       NAMES OF REPORTING PERSONS
                  SC Realty Incorporated
         I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
                  88-0330184

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

2.       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP             _
                                                                 (a) |_|
                                                                      _
                                                                 (b) |_|
--------------------------------------------------------------------------------

3.       SEC USE ONLY

--------------------------------------------------------------------------------
4.       SOURCE OF FUNDS

         BK, OO
--------------------------------------------------------------------------------

5.       CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
         PURSUANT TO ITEMS 2(d) OR 2(e)                               _
                                                                     |_|
--------------------------------------------------------------------------------

6.       CITIZENSHIP OR PLACE OF ORGANIZATION

         Nevada
--------------------------------------------------------------------------------
    Number of    |     |     7.  SOLE VOTING POWER
                 |     |
      Shares     |     |          28,603,417
                 |--------------------------------------------------------------
   Beneficially  |     |     8.  SHARED VOTING POWER
                 |     |
     Owned By    |     |          -0-
                 |--------------------------------------------------------------
       Each      |     |     9.  SOLE DISPOSITIVE POWER
                 |     |
    Reporting    |     |          28,603,417
                 |--------------------------------------------------------------
   Person With   |     |     10.  SHARED DISPOSITIVE POWER
                 |     |
                 |     |          -0-
--------------------------------------------------------------------------------
11.      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
         28,603,417

--------------------------------------------------------------------------------
12.      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
         CERTAIN SHARES                                               _
                                                                     |_|
--------------------------------------------------------------------------------
13.      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
         45.7%

--------------------------------------------------------------------------------
14.      TYPE OF REPORTING PERSON REPORTING

         CO
--------------------------------------------------------------------------------



                                  SCHEDULE 13D

 -------------------------                           -----------------
 | CUSIP No. 861907 10 3 |                           |  Page 5 of 10 |
 -------------------------                           -----------------


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

1.       NAMES OF REPORTING PERSONS
                  Security Capital Operations Incorporated
         I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
                  52-2146697

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

2.       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP             _
                                                                 (a) |_|
                                                                      _
                                                                 (b) |_|
--------------------------------------------------------------------------------

3.       SEC USE ONLY

--------------------------------------------------------------------------------
4.       SOURCE OF FUNDS

         BK, OO
--------------------------------------------------------------------------------

5.       CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
         PURSUANT TO ITEMS 2(d) OR 2(e)                               _
                                                                     |_|
--------------------------------------------------------------------------------

6.       CITIZENSHIP OR PLACE OF ORGANIZATION

         Maryland
--------------------------------------------------------------------------------
    Number of    |     |     7.  SOLE VOTING POWER
                 |     |
      Shares     |     |          28,603,417
                 |--------------------------------------------------------------
   Beneficially  |     |     8.  SHARED VOTING POWER
                 |     |
     Owned By    |     |          -0-
                 |--------------------------------------------------------------
       Each      |     |     9.  SOLE DISPOSITIVE POWER
                 |     |
    Reporting    |     |          28,603,417
                 |--------------------------------------------------------------
   Person With   |     |     10.  SHARED DISPOSITIVE POWER
                 |     |
                 |     |          -0-
--------------------------------------------------------------------------------
11.      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
         28,603,417

--------------------------------------------------------------------------------
12.      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
         CERTAIN SHARES                                               _
                                                                     |_|
--------------------------------------------------------------------------------
13.      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
         45.7%

--------------------------------------------------------------------------------
14.      TYPE OF REPORTING PERSON REPORTING

         CO
--------------------------------------------------------------------------------



                                  SCHEDULE 13D

 -------------------------                           -----------------
 | CUSIP No. 861907 10 3 |                           |  Page 6 of 10 |
 -------------------------                           -----------------


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

1.       NAMES OF REPORTING PERSONS
                  Security Capital Office Business Trust (formerly East Mixed-
                  Use Realty Investors Trust)
         I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
                  74-2869172

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

2.       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP             _
                                                                 (a) |_|
                                                                      _
                                                                 (b) |_|
--------------------------------------------------------------------------------

3.       SEC USE ONLY

--------------------------------------------------------------------------------
4.       SOURCE OF FUNDS

         BK, OO
--------------------------------------------------------------------------------

5.       CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
         PURSUANT TO ITEMS 2(d) OR 2(e)                               _
                                                                     |_|
--------------------------------------------------------------------------------

6.       CITIZENSHIP OR PLACE OF ORGANIZATION

         Maryland
--------------------------------------------------------------------------------
    Number of    |     |     7.  SOLE VOTING POWER
                 |     |
      Shares     |     |          28,603,417
                 |--------------------------------------------------------------
   Beneficially  |     |     8.  SHARED VOTING POWER
                 |     |
     Owned By    |     |          -0-
                 |--------------------------------------------------------------
       Each      |     |     9.  SOLE DISPOSITIVE POWER
                 |     |
    Reporting    |     |          28,603,417
                 |--------------------------------------------------------------
   Person With   |     |     10.  SHARED DISPOSITIVE POWER
                 |     |
                 |     |          -0-
--------------------------------------------------------------------------------
11.      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
         28,603,417

--------------------------------------------------------------------------------
12.      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
         CERTAIN SHARES                                               _
                                                                     |_|
--------------------------------------------------------------------------------
13.      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
         45.7%

--------------------------------------------------------------------------------
14.      TYPE OF REPORTING PERSON REPORTING

         CO
--------------------------------------------------------------------------------





         This Amendment No. 18 is filed by Security Capital Group Incorporated
("Security Capital Group"), a Maryland corporation, SC Realty Incorporated, a
Nevada corporation and an indirect wholly owned subsidiary of Security Capital
Group ("SC-Realty"), Security Capital Operations Incorporated, a Maryland
corporation and wholly owned subsidiary of SC-Realty ("Operations"), and
Security Capital Office Business Trust (formerly East Mixed-Use Realty Investors
Trust) a Maryland real estate investment trust and subsidiary of Operations
("East"), and amends the Schedule 13D originally filed (as previously amended,
the "Schedule 13D") by Security Capital Group, SC-Realty and Security Capital
Holdings S.A. ("Holdings"), a corporation organized and existing under the laws
of Luxembourg and a wholly owned subsidiary of SC-Realty. This Amendment No. 18
relates to shares of common stock, par value $0.01 per share ("Common Stock"),
of CarrAmerica Realty Corporation, a Maryland corporation formerly named Carr
Realty Corporation ("Carr"). Capitalized terms used herein without definition
shall have the meanings ascribed thereto in the Schedule 13D.

ITEM 4.  PURPOSE OF THE TRANSACTION

Item 4 is hereby amended to add the following:

         On November 15, 2001, pursuant to a Purchase and Sale Agreement entered
into on that date (the "Purchase and Sale Agreement"), Carr agreed to purchase
9,200,000 shares of Common Stock held by Security Capital Group for
consideration of $265,420,000 in cash. As a result of the purchase, Security
Capital Group's ownership of Common Stock will be reduced from 28,603,417
shares, or 45.7% of the outstanding Common Stock to 19,403,417 shares of Common
Stock, or 37.4% of the outstanding Common Stock (after giving effect to the
cancellation by Carr of the Common Stock acquired by Carr in the transaction
reported herein). Pursuant to the Stockholders Agreement, Security Capital Group
has the right to nominate a number of directors to the Carr board in proportion
to Security Capital Group's ownership of Common Stock (but not more than 40%). A
copy of the Purchase and Sale Agreement is attached hereto as Exhibit 17 and
incorporated herein by reference.

         Separately, on November 15, 2001 Security Capital Group sent a letter
to Carr exercising its rights (the "Registration Request") pursuant to the
Registration Rights Agreement, dated as of April 30, 1996, by and among
SC-Realty, Holdings and Carr, and to which Security Capital Group has become
party as a result of the transactions between Security Capital Group, SC-Realty
and Holdings and the consent granted by Carr pursuant to that certain letter
agreement dated July 28, 2000 between Carr and Security Capital Group, to
request that Carr promptly file a shelf registration statement (the
"Registration Statement") on Form S-3 for the registration under the Securities
Act of 1933, as amended, of 19,403,417 shares of Common Stock which are owned by
Security Capital Office Business Trust, an indirectly owned subsidiary of
Security Capital Group. A copy of the Registration Request is attached hereto as
Exhibit 18 and is incorporated herein by reference.

         The Registration Statement must be filed by Carr and declared effective
by the SEC before Security Capital Group can sell any shares of Common Stock
under the Registration Statement. Security Capital Group requested the filing of
the Registration Statement to provide



for maximum flexibility as Security Capital Group works towards achieving its
long-term stated objectives.

         If the Registration Statement is filed and declared effective, Security
Capital Group may from time to time offer and sell any or all the shares of
Common Stock covered by the Registration Statement. The registration of Common
Stock does not necessarily mean that Security Capital Group will sell all or any
of the Common Stock.

         Security Capital Group may sell shares of Common Stock under the
Registration Statement directly or through broker-dealers or underwriters who
may act solely as agents, or who may acquire shares as principals. Shares of
Common Stock may be sold from time to time by Security Capital Group or by its
permitted pledgees, transferees or other successors in interest to Security
Capital Group. The distribution of the shares of Common Stock may be effected in
one or more transactions that may take place through the New York Stock
Exchange, including block trades or ordinary broker's transactions, or through
broker-dealers acting either as principal or agent, or through privately
negotiated transactions, or through an underwritten public offering, or through
a combination of any such methods of sale, at market prices prevailing at the
time of sale, at prices related to such prevailing market prices or at
negotiated prices. Usual and customary or specifically negotiated brokerage fees
or commissions may be paid by Security Capital Group in connection with such
sales.

         Notwithstanding the Registration Request, Security Capital Group may
decide not to sell its shares of Common Stock pursuant to the Registration
Statement or otherwise, and intends to continue to actively consider a wide
range of transactions with respect to each of its investments, including Carr,
and may, from time to time, enter into discussions with Carr and/or third
parties, concerning Security Capital Group's holdings of Common Stock and
possible future extraordinary transactions involving Security Capital Group and
Carr, which could involve any of the items enumerated in the Schedule 13D
instructions to this Item 4. Security Capital Group also reserves the right,
based on all relevant factors, and consistent with its contractual obligations,
to change its investment intent with respect to Carr at any time in the future,
to dispose of all or a portion of its holdings of Common Stock, or to change its
intention with respect to any or all of the matters referred to in this Schedule
13D. However, any action or discussions taken in such connection will be subject
to and conducted in accordance with all applicable legal rules and contractual
agreements to which Security Capital Group is subject or which otherwise apply
to the purchase or sale of Common Stock or Security Capital Group's investment
in Carr including, without limitation, the relevant "standstill" provisions of
the Stockholders Agreement as previously described in this Schedule 13D. Nothing
contained herein is intended to indicate any intent to act otherwise than in
accordance with such provisions and covenants, to modify any such provisions or
to encourage Carr or any other person to do so.

         In reaching any conclusion as to its future course of action, including
whether or not to sell its shares of Common Stock pursuant to the Registration
Statement or otherwise, Security Capital Group will take into consideration
various factors, such as Carr's business and prospects, other developments
concerning Carr, other business opportunities available to Secu-




rity Capital Group, developments with respect to the business of Security
Capital Group, its contractual obligations and general economic and stock market
conditions, including, but not limited to, the market price of the Common Stock
and of Security Capital Group's own common stock. There can be no assurance as
to whether Security Capital Group will take any action with respect to its
ownership of Common Stock, or enter into any discussions with Carr or with any
third parties with respect to the Common Stock or Carr, whether such discussions
will lead to any transaction that might be considered or agreed to by any third
party, Carr or Security Capital Group, the terms of any such transaction, or the
timing or certainty of any such transaction.

         Security Capital Group also issued a press release on November 16, 2001
announcing the Purchase and Sale Agreement and the Registration Request, a copy
of this press release is attached hereto as Exhibit 19 and is incorporated
herein by reference.

Item 7.  Material to be filed as Exhibits

Exhibit 17        Purchase and Sale Agreement by and between Security Capital
                  Group and Carr, dated as of November 15, 2001.

Exhibit 18        Letter from Security Capital Group to Carr, dated November 15,
                  2001.

Exhibit 19        Security Capital Group Press Release, dated November 16, 2001.






                                    SIGNATURE

         After reasonable inquiry and to the best of the undersigned's knowledge
and belief, the undersigned certifies that the information set forth in this
statement is true, complete and correct.



                                    SECURITY CAPITAL GROUP INCORPORATED


                                    By: /s/ Jeffrey A. Klopf
                                    Name:  Jeffrey A. Klopf
                                    Title: Senior Vice President and Secretary


                                    SC CAPITAL INCORPORATED


                                    By: /s/ Jeffrey A. Klopf
                                    Name:  Jeffrey A. Klopf
                                    Title: Secretary

                                    SC REALTY INCORPORATED


                                    By: /s/ Jeffrey A. Klopf
                                    Name:  Jeffrey A. Klopf
                                    Title: Secretary


                                    SECURITY CAPITAL OPERATIONS INCORPORATED


                                    By: /s/ Jeffrey A. Klopf
                                    Name:  Jeffrey A. Klopf
                                    Title: Secretary


                                    SECURITY CAPITAL OFFICE BUSINESS TRUST


                                    By: /s/ Jeffrey A. Klopf
                                    Name:  Jeffrey A. Klopf
                                    Title: Secretary
     November 15, 2001






                                  Exhibit Index


Exhibit 17        Purchase and Sale Agreement by and between Security Capital
                  Group Incorporated and CarrAmerica Realty Corporation, dated
                  as of November 15, 2001.

Exhibit 18        Letter from Security Capital Group Incorporated to CarrAmerica
                  Realty Corporation, dated November 15, 2001.

Exhibit 19        Security Capital Group Incorporated Press Release, dated
                  November 16, 2001.