Exhibit 10.3

                  Amendment to Cost Sharing and Administrative
                               Services Agreement





     This Amendment to Cost Sharing and  Administrative  Services Agreement (the
"Amendment")  dated as of January 2, 1997 by and among PSCC,  Inc., a California
corporation  ("PSCC"),  and each of the entities  listed on the signature  pages
hereof under the designation "Owners" (the "Owners"):

                                    RECITALS:

     A. PSCC and the Owners (other than American Office Park  Properties,  L.P.)
are parties to the Cost Sharing and  Administrative  Services Agreement dated as
of November 16, 1995 (the "Original Agreement").

     B. The  parties  to this  Amendment  desire  to add  American  Office  Park
Properties,  L.P. ("AOPP") as a party to the Original Agreement on the terms set
forth in this Amendment.

     Now, therefore, the parties agree as follows:

     1. AOPP is hereby added as a party to the Original  Agreement as one of the
Owners for all  purposes  and is hereby  included  on  Schedules  B and C to the
Original Agreement.  Amended and restated Schedules B and C are attached to this
Amendment.

     2.  Notwithstanding  section 5(a) of the Original  Agreement,  the Original
Agreement,  as  amended,  shall  not be  terminable  as to AOPP  until the fifth
anniversary of this Amendment.  Thereafter,  the Original Agreement, as amended,
shall expire in accordance with section 5(a) of the Original Agreement.

     3. Section 12 of the Original  Agreement is hereby  amended in its entirety
to read as follows:

     "12. Property Management Agreements With PSI and AOPP

     Certain of the Owners have entered into management  agreements with PSI and
AOPP,  pursuant to which PSI or AOPP provides property  management services with
respect to Properties  owned by such Owner (the "Management  Agreements").  Each
such Owner  acknowledges  and agrees that (i) PSCC shall not be responsible  for
the  performance  or failure  to  perform  of PSI or AOPP  under the  Management
Agreements,  (ii) PSI and AOPP shall not be responsible  for the  performance or
failure to perform of PSCC under this Agreement,  and (iii) the  compensation of
PSCC under this  Agreement is separate from and in addition to the  compensation
of PSI or AOPP under the Management  Agreements.  The  compensation of PSCC will
not  be  reduced  by  the  compensation  of PSI or  AOPP  under  the  Management
Agreements,  and the compensation of PSI or AOPP under the Management Agreements
will not be reduced by the compensation of PSCC under this Agreement." 4. Except
as provided by this  Amendment,  all of the terms of the Original  Agreement are
hereby  ratified  and  affirmed.  IN WITNESS  WHEREOF,  the parties  hereto have
executed this Amendment as of the date first above written. 


                                       67

                                  "PSCC" PSCC, INC.


                                  By:      /s/ David P. Singelyn
                                           ------------------------------
                                           David P. Singelyn, Controller
                                           701 Western Avenue
                                           Glendale, California 91201

                                  "Owners"
                                  PUBLIC STORAGE, INC.




                                  By:      /s/ David P. Singelyn
                                           ------------------------------
                                           David P. Singelyn, Vice President
                                           701 Western Avenue
                                           Glendale, California 91201
                                  PUBLIC STORAGE PROPERTIES XI, INC.




                                  By:      /s/ David P. Singelyn
                                           ------------------------------
                                           David P. Singelyn
                                           Chief Financial Officer
                                           701 Western Avenue
                                           Glendale, California 91201
                                  PUBLIC STORAGE PROPERTIES XIV, INC.




                                  By:      /s/ David P. Singelyn
                                           ------------------------------
                                           David P. Singelyn
                                           Chief Financial Officer
                                           701 Western Avenue
                                           Glendale, California 91201
                                  PUBLIC STORAGE PROPERTIES XV, INC.




                                  By:      /s/ David P. Singelyn
                                           ------------------------------
                                           David P. Singelyn
                                           Chief Financial Officer
                                           701 Western Avenue
                                           Glendale, California 91201
                                  PUBLIC STORAGE PROPERTIES XVI, INC.




                                  By:      /s/ David P. Singelyn
                                           ------------------------------
                                           David P. Singelyn
                                           Chief Financial Officer
                                           701 Western Avenue
                                           Glendale, California 91201
                                  PUBLIC STORAGE PROPERTIES XVII, INC.


                                       68


                                  By:      /s/ David P. Singelyn
                                           ------------------------------
                                           David P. Singelyn
                                           Chief Financial Officer
                                           701 Western Avenue
                                           Glendale, California 91201
                                PUBLIC STORAGE PROPERTIES XVIII, INC.




                                  By:      /s/ David P. Singelyn
                                           ------------------------------
                                           David P. Singelyn
                                           Chief Financial Officer
                                           701 Western Avenue
                                           Glendale, California 91201
                                  PUBLIC STORAGE PROPERTIES XIX, INC.




                                  By:      /s/ David P. Singelyn
                                           ------------------------------
                                           David P. Singelyn
                                           Chief Financial Officer
                                           701 Western Avenue
                                           Glendale, California 91201
                                  PUBLIC STORAGE PROPERTIES XX, INC.




                                  By:      /s/ David P. Singelyn
                                           ------------------------------
                                           David P. Singelyn
                                           Chief Financial Officer
                                           701 Western Avenue
                                           Glendale, California 91201



                                       69


                                  PS PARTNERS, LTD.,
                                  a California Limited Partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:     /s/ David P. Singelyn
                                                   ----------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  PS PARTNERS II, LTD.,
                                  a California Limited Partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                    ---------------------------
                                                    David P. Singelyn
                                                    Vice President
                                                    701 Western Avenue
                                                    Glendale, California 91201
                                  PS PARTNERS III, LTD.,
                                  a California Limited Partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                    ---------------------------
                                                    David P. Singelyn
                                                    Vice President
                                                    701 Western Avenue
                                                    Glendale, California 91201
                                  PS PARTNERS IV, LTD.,
                                  a California Limited Partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                    ---------------------------
                                                    David P. Singelyn
                                                    Vice President
                                                    701 Western Avenue
                                                    Glendale, California 91201
                                       70


                                  PS PARTNERS V, LTD.,
                                  a California Limited Partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                    ---------------------------
                                                    David P. Singelyn
                                                    Vice President
                                                    701 Western Avenue
                                                    Glendale, California 91201
                                  PS PARTNERS VI, LTD.,
                                  a California Limited Partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                    ---------------------------
                                                    David P. Singelyn
                                                    Vice President
                                                    701 Western Avenue
                                                    Glendale, California 91201
                                  PS PARTNERS VII, LTD.,
                                  a California Limited Partnership
                                  By:      Public Storage, Inc.,
                                           General Partner



                                           By:      /s/ David P. Singelyn
                                                    ---------------------------
                                                    David P. Singelyn
                                                    Vice President
                                                    701 Western Avenue
                                                    Glendale, California 91201
                                  PS PARTNERS VIII, LTD.,
                                  a California Limited Partnership
                                  By:      Public Storage, Inc.,
                                           General Partner



                                           By:      /s/ David P. Singelyn
                                                    ---------------------------
                                                    David P. Singelyn
                                                    Vice President
                                                    701 Western Avenue
                                                    Glendale, California 91201
                                       71


                                  CONNECTICUT STORAGE FUND,
                                  a California Limited Partnership
                                  By:      PSI Institutional Advisors, Inc.,
                                           General Partner



                                           By:     /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  METROPUBLIC STORAGE FUND,
                                  a California Limited Partnership
                                  By:      PSI Institutional Advisors, Inc.,
                                           General Partner



                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  PUBLIC STORAGE INSTITUTIONAL FUND,
                                  a California Limited Partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                    David P. Singelyn
                                                    Vice President
                                                    701 Western Avenue
                                                    Glendale, California 91201
                                  PUBLIC STORAGE INSTITUTIONAL FUND II,
                                  a California Limited Partnership
                                  By:      PSI Institutional Advisors, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                  ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  PUBLIC STORAGE INSTITUTIONAL FUND III,
                                  a California Limited Partnership
                                  By:      PSI Institutional Advisors, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                       72


                                  PS CO-INVESTMENT PARTNERS,
                                  a general partnership
                                  By:      Public Storage Institutional Fund IV,
                                           a California Limited Partnership
                                           By:  PSI Institutional Advisors, Inc.
                                                General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  By:      Diversified Storage Venture Fund,
                                           a California Limited Partnership
                                           By:      Public Storage, Inc.
                                                    General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  PUBLIC STORAGE PARTNERS, LTD.,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  PUBLIC STORAGE PARTNERS II, LTD.,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner





                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201


                                    73


                                  PUBLIC STORAGE PROPERTIES, LTD.,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner



                                     By:      /s/ David P. Singelyn
                                              ---------------------------
                                              David P. Singelyn,  Vice President
                                              701 Western Avenue
                                              Glendale, California 91201
                                  PUBLIC STORAGE PROPERTIES IV, LTD.,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                     By:      /s/ David P. Singelyn
                                              ---------------------------
                                              David P. Singelyn,  Vice President
                                              701 Western Avenue
                                              Glendale, California 91201
                                  PUBLIC STORAGE PROPERTIES V, LTD.,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                     By:      /s/ David P. Singelyn
                                              ---------------------------
                                              David P. Singelyn,  Vice President
                                              701 Western Avenue
                                              Glendale, California 91201
                                  PUBLIC STORAGE MID-ATLANTIC, LTD.,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  PUBLIC STORAGE MID-ATLANTIC II, LTD.,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                       74


                                  PS MINI-WAREHOUSE FUND I-X
                                  By:      PSI Institutional Advisors, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  PUBLIC STORAGE GERMAN FUND II, LTD.,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  PUBLIC STORAGE EURO FUND III, LTD.,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  PUBLIC STORAGE EURO PARTNERSHIP IV,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  PUBLIC STORAGE EURO PARTNERSHIP V,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                       75


                                  PUBLIC STORAGE EURO PARTNERSHIP VI,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  PUBLIC STORAGE EURO PARTNERSHIP VII,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  PUBLIC STORAGE EURO PARTNERSHIP VIII,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  PUBLIC STORAGE EURO PARTNERSHIP IX,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  PUBLIC STORAGE EURO PARTNERSHIP X,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
  
                                       76


                                PUBLIC STORAGE EURO PARTNERSHIP XI,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  PUBLIC STORAGE EURO PARTNERSHIP XII,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  PUBLIC STORAGE EURO PARTNERSHIP XIII,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  PUBLIC STORAGE BENELUX PARTNERS I, LTD.,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  PUBLIC STORAGE BENELUX PARTNERSHIP V, LTD.,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                       77


                                  PUBLIC STORAGE CRESCENT FUND, LTD.,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  PUBLIC STORAGE GLENDALE FREEWAY, LTD.,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  PUBLIC STORAGE ALAMEDA, LTD.,
                                  a California limited partnership
                                  By:      Public Storage, Inc.,
                                           General Partner




                                           By:      /s/ David P. Singelyn
                                                   ---------------------------
                                                   David P. Singelyn, Controller
                                                   701 Western Avenue
                                                   Glendale, California 91201
                                  AMERICAN OFFICE PARK PROPERTIES, L.P.,
                                  a California limited partnership
                                  By:    American Office Park Properties, Inc.,
                                         General Partner




                                       By:      /s/Ronald L. Havner, Jr.
                                               ---------------------------
                                               Ronald L. Havner, Jr., President
                                               701 Western Avenue
                                               Glendale, California 91201


                                       78

                                   SCHEDULE A


ACCOUNTING AND FINANCE
- ----------------------
    Property accounting and finance, including producing general ledgers and
      income statements
    Corporate tax
    Financial reporting
    Cash control
    Compliance with applicable statutes, ordinances, laws, rules, regulations
ADMINISTRATIVE SERVICES
- -----------------------
    Employee relations
    Property tax appeals
    Yellow page advertising
     Management information systems
     Hotline/CHAMP
     Acquisition of furniture, fixtures and supplies
     Insurance, including filing and managing insurance claims and
       administering entity level insurance
     Selection  of  vendors,  suppliers,  contractors,   subcontractors  and
     employees Negotiation and execution of agreements related to utilities,
     service,
       concessions, supplies, maintenance, operation and repair
MANAGEMENT
- ----------
       Legal
       Marketing
       Training
       Investor services, including answering investor's questions and sending
         correspondence  and financial  reports to investors and  coordinating
         efforts of outside transfer agents
       Institutional Realty
       Maintenance, repair and landscaping
PROJECT PERSONNEL
- -----------------
       Resident managers
       District managers
       Relief managers
       Maintenance managers
MISCELLANEOUS
- -------------
       PSCP facilities support

                                       79



                                   SCHEDULE B


                  Public Storage Properties XI, Inc.
                  Public Storage Properties XIV, Inc.
                  Public Storage Properties XV, Inc.
                  Public Storage Properties XVI, Inc.
                  Public Storage Properties XVII, Inc.
                  Public Storage Properties XVIII, Inc.
                  Public Storage Properties XIX, Inc.
                  Public Storage Properties XX, Inc.
                  American Office Park Properties, L.P.





                                       80


                                   SCHEDULE C


                  Public Storage, Inc.

                  Public Storage Properties XI, Inc.

                  Public Storage Properties XIV, Inc.

                  Public Storage Properties XV, Inc.

                  Public Storage Properties XVI, Inc.

                  Public Storage Properties XVII, Inc.

                  Public Storage Properties XVIII, Inc.

                  Public Storage Properties XIX, Inc.

                  Public Storage Properties XX, Inc.

                  PS Partners, Ltd.

                  PS Partners II, Ltd.

                  PS Partners III, Ltd.

                  PS Partners IV, Ltd.

                  PS Partners V, Ltd.

                  PS Partners VI, Ltd.

                  PS Partners VII, Ltd.

                  PS Partners VIII, Ltd.

                  Connecticut Storage Fund

                  Metropublic Storage Fund

                  Public Storage Institutional Fund

                  Public Storage Institutional Fund II

                  Public Storage Institutional Fund III

                  PS Co-Investment Partners

                  Public Storage Partners, Ltd.

                  Public Storage Partners II, Ltd.

                  Public Storage Properties, Ltd.

                  Public Storage Properties IV, Ltd.

                  Public Storage Properties V, Ltd.

                  Public Storage Mid-Atlantic, Ltd.

                  Public Storage Mid-Atlantic II, Ltd.

                  Public Storage Mini-Warehouse Fund I-X

                  Public Storage German Fund II, Ltd.

                  Public Storage Euro Fund III, Ltd.

                  Public Storage Euro Partnership IV, Ltd.

                                       81


                  Public Storage Euro Partnership V, Ltd.

                  Public Storage Euro Partnership VI, Ltd.

                  Public Storage Euro Partnership VII, Ltd.

                  Public Storage Euro Partnership VIII, Ltd.

                  Public Storage Euro Partnership IX, Ltd.

                  Public Storage Euro Partnership X, Ltd.

                  Public Storage Euro Partnership XI, Ltd.

                  Public Storage Euro Partnership XII, Ltd.

                  Public Storage Euro Partnership XIII, Ltd.

                  Public Storage Benelux Partners I, Ltd.

                  Public Storage Benelux Partnership V, Ltd.

                  Public Storage Crescent Fund, Ltd.

                  Public Storage Glendale Freeway, Ltd.

                  Public Storage Alameda, Ltd.

                  American Office Park Properties, L.P.


                                       82