SHURGARD STORAGE CENTERS INC
S-4, 1996-07-11
TRUCKING & COURIER SERVICES (NO AIR)
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<PAGE>
     AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JULY 11, 1996
 
                                                      REGISTRATION NO. 333-
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------
                                    FORM S-4
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                            ------------------------
                         SHURGARD STORAGE CENTERS, INC.
 
             (Exact Name of Registrant as Specified in Its Charter)
 
<TABLE>
<S>                              <C>                            <C>
           DELAWARE                          6519                  95-1603837
 (State or Other Jurisdiction    (Primary Standard Industrial   (I.R.S. Employer
              of                 Classification Code Number)     Identification
Incorporation or Organization)                                      Number)
</TABLE>
 
            1201 THIRD AVENUE, SUITE 2200, SEATTLE, WASHINGTON 98101
                                 (206) 624-8100
          (Address, including Zip Code and Telephone Number, including
            Area Code, of Registrant's Principal Executive Offices)
 
                                KRISTIN H. STRED
              SENIOR VICE PRESIDENT, GENERAL COUNSEL AND SECRETARY
                         SHURGARD STORAGE CENTERS, INC.
                         1201 THIRD AVENUE, SUITE 2200
                           SEATTLE, WASHINGTON 98101
                                 (206) 624-8100
           (Name, Address, including Zip Code, and Telephone Number,
                   including Area Code, of Agent for Service)
                            ------------------------
                                WITH COPIES TO:
 
<TABLE>
<S>                                       <C>
           Jeffrey T. Pero                           Vicki M. Pierce
          William J. Cernius                       Linda A. Schoemaker
           LATHAM & WATKINS                            PERKINS COIE
  650 Town Center Drive, 20th Floor           1201 Third Avenue, 40th Floor
     Costa Mesa, California 92626               Seattle, Washington 98101
            (714) 540-1235                            (206) 583-8888
</TABLE>
 
                            ------------------------
        APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:
AS SOON AS PRACTICABLE AFTER THE EFFECTIVE DATE OF THIS REGISTRATION STATEMENT.
                            ------------------------
 
    If  the  securities  being registered  on  this  Form are  being  offered in
connection with the formation of a holding company and there is compliance  with
General Instruction G, check the following box. / /
                            ------------------------
 
                        CALCULATION OF REGISTRATION FEE
 
<TABLE>
<CAPTION>
                                                                               PROPOSED
                                                              PROPOSED          MAXIMUM
                                                               MAXIMUM         AGGREGATE        AMOUNT OF
        TITLE OF EACH CLASS OF             AMOUNT TO BE    OFFERING PRICE      OFFERING       REGISTRATION
      SECURITIES TO BE REGISTERED         REGISTERED (2)      PER SHARE        PRICE (3)           FEE
<S>                                      <C>               <C>              <C>              <C>
Class A Common Stock, par value $0.001
 per share (1).........................  4,609,303 shares        --           $72,939,928        $25,152
<FN>
(1)  Includes associated preferred share purchase rights.
(2)  Represents the maximum number of shares issuable in the Mergers.
(3)  Estimated   solely  for  the  purpose  of   computing  the  amount  of  the
     registration fee pursuant  to Rule  457(f)(2) under the  Securities Act  of
     1933,  as  amended. The  fee  was computed  based  upon (i)  the historical
     aggregate book  value of  units  of limited  partnership interest  and  the
     general  partner  interest  in  IDS/Shurgard  Income  Growth  Partners L.P.
     ($26,770,587 as  of March  31, 1996),  (ii) the  historical aggregate  book
     value  of units  of limited  partnership interest  and the  general partner
     interest in IDS/Shurgard Income Growth Partners L.P. II ($21,812,025 as  of
     March  31, 1996) and (iii) the historical  aggregate book value of units of
     limited  partnership  interest   and  the  general   partner  interest   in
     IDS/Shurgard  Income Growth Partners L.P. III  ($24,357,316 as of March 31,
     1996).
</TABLE>
 
                            ------------------------
    THE REGISTRANT HEREBY  AMENDS THIS  REGISTRATION STATEMENT ON  SUCH DATE  OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE  A  FURTHER  AMENDMENT  WHICH SPECIFICALLY  STATES  THAT  THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE  IN ACCORDANCE WITH SECTION 8(A)  OF
THE  SECURITIES ACT  OF 1933, AS  AMENDED, OR UNTIL  THIS REGISTRATION STATEMENT
SHALL BECOME EFFECTIVE ON SUCH DATE  AS THE SECURITIES AND EXCHANGE  COMMISSION,
ACTING PURSUANT TO SAID SECTION 8(A), MAY DETERMINE.
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
                         SHURGARD STORAGE CENTERS, INC.
              CROSS-REFERENCE SHEET BETWEEN ITEMS IN FORM S-4 AND
              PROSPECTUS PURSUANT TO ITEM 501(B) OF REGULATION S-K
 
<TABLE>
<CAPTION>
  ITEM                                                                        LOCATION OF CAPTION IN PROXY
   NO.                       FORM S-4 CAPTION                                     STATEMENT/PROSPECTUS
- ---------  -----------------------------------------------------  -----------------------------------------------------
<C>        <S>                                                    <C>
       1.  Forepart of the Registration Statement and Outside
            Front Cover Page of Prospectus......................  Outside Front Cover Page
       2.  Inside Front and Outside Back Cover Pages of
            Prospectus..........................................  Inside Front Cover Page; Available Information;
                                                                   Incorporation of Certain Documents by Reference;
                                                                   Table of Contents
       3.  Risk Factors, Ratio of Earnings to Fixed Charges and
            Other Information...................................  Summary; Selected Financial Information of the
                                                                   Company; Risk Factors and Other Considerations; The
                                                                   Special Meetings; The Mergers; Pro Forma
                                                                   Consolidated Financial Statements; Business and
                                                                   Properties of the Partnerships; Distributions and
                                                                   Market Prices of Units; Distributions and Market
                                                                   Prices of Common Stock
       4.  Terms of the Transaction.............................  Summary; Background and Reasons for the Mergers; The
                                                                   Acquisition Agreement
       5.  Pro Forma Financial Information......................  Pro Forma Consolidated Financial Statements
       6.  Material Contracts With the Company Being Acquired...  The Mergers
       7.  Additional Information Required for Reoffering by
            Persons and Parties Deemed to Be Underwriters.......  Not Applicable
       8.  Interests of Named Experts and Counsel...............  Not Applicable
       9.  Disclosure of Commission Position on Indemnification
            for Securities Act Liabilities......................  Not Applicable
      10.  Information With Respect to S-3 Registrants..........  Incorporation of Certain Documents by Reference
      11.  Incorporation of Certain Information by Reference....  Incorporation of Certain Documents by Reference
      12.  Information With Respect to S-2 or S-3 Registrants...  Incorporation of Certain Documents by Reference
      13.  Incorporation of Certain Information by Reference....  Incorporation of Certain Documents by Reference
      14.  Information With Respect to Registrants Other Than
            S-2 or S-3 Registrants..............................  Not Applicable
      15.  Information With Respect to S-3 Companies............  Not Applicable
</TABLE>
<PAGE>
<TABLE>
<CAPTION>
  ITEM                                                                        LOCATION OF CAPTION IN PROXY
   NO.                       FORM S-4 CAPTION                                     STATEMENT/PROSPECTUS
- ---------  -----------------------------------------------------  -----------------------------------------------------
      16.  Information With Respect to S-2 or S-3 Companies.....  Not Applicable
<C>        <S>                                                    <C>
      17.  Information With Respect to Companies Other Than S-2
            or S-3 Companies....................................  Business and Properties of the Partnerships;
                                                                   Distributions and Market Prices of Units; Historical
                                                                   Financial Statements
      18.  Information if Proxies, Consents or Authorizations
            Are to Be Solicited.................................  Outside Front Cover Page; Summary; The Special
                                                                   Meetings; Background and Reasons for the Mergers;
                                                                   Business and Properties of the Partnerships
      19.  Information if Proxies, Consents or Authorizations
            Are Not to Be Solicited, or in an Exchange Offer....  Not Applicable
</TABLE>
 
<PAGE>
                    IDS/SHURGARD INCOME GROWTH PARTNERS L.P.
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. II
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. III
                         1201 THIRD AVENUE, SUITE 2200
                           SEATTLE, WASHINGTON 98101
 
                                                                          , 1996
 
Dear Limited Partners:
 
    Special  Meetings of limited partners in IDS/Shurgard Income Growth Partners
L.P., IDS/Shurgard  Income  Growth Partners  L.P.  II, and  IDS/Shurgard  Income
Growth  Partners L.P. III, each a  Washington limited partnership (together, the
"Partnerships"), will be held on             , 1996, at 10:00 a.m., local  time,
at  1201 Third Avenue, Suite 2200, Seattle, Washington (the "Special Meetings").
You are cordially invited  to attend the Special  Meeting of the Partnership  of
which you are a limited partner.
 
    At each of the Special Meetings, including any adjournments or postponements
thereof,  limited  partners  of the  respective  Partnerships will  be  asked to
consider and vote upon approval of the Acquisition Agreement dated as of July 1,
1996 (the "Acquisition Agreement"),  by and among each  of the Partnerships  and
Shurgard   Storage  Centers,  Inc.,  a  Delaware  corporation  (the  "Company"),
providing for the merger of each of  the Partnerships with and into the  Company
(collectively,  the "Mergers").  Approval of  the Acquisition  Agreement and the
transactions contemplated thereby by limited partners of a Partnership will,  if
applicable,  also  constitute approval  of the  amendments to  the Partnership's
Amended and  Restated Agreement  of Limited  Partnership that  are necessary  to
effect  its  respective  Merger. THE  CLOSING  OF  EACH OF  THE  MERGERS  IS NOT
CONDITIONED UPON THE CLOSING OF ANY OF THE OTHER MERGERS.
 
    The Acquisition Agreement and the transactions contemplated thereby are more
fully  described  in  the  accompanying  Proxy  Statement/Prospectus,  including
discussions  concerning the reasons  for the Mergers and  factors that should be
considered in  connection with  your vote  on the  Merger of  your  Partnership.
Please review this information carefully.
 
    AFTER CAREFUL CONSIDERATION, THE GENERAL PARTNER OF EACH OF THE PARTNERSHIPS
HAS  DETERMINED THAT THE  APPLICABLE MERGER IS  FAIR TO THE  UNITHOLDERS OF THAT
PARTNERSHIP. ACCORDINGLY, EACH GENERAL PARTNER RECOMMENDS THAT UNITHOLDERS  VOTE
FOR  APPROVAL  OF THE  ACQUISITION AGREEMENT  AND THE  TRANSACTIONS CONTEMPLATED
THEREBY.
 
    I hope  that  you will  attend  the  Special Meeting  of  your  Partnership.
However,  whether  or  not  you  plan to  attend  your  Special  Meeting, please
complete, sign and date the  enclosed proxy card and  promptly return it in  the
enclosed  postage prepaid envelope. If you  are present at your Special Meeting,
you may,  if you  wish, withdraw  your proxy  and vote  in person.  If you  have
questions  or need assistance  in completing your proxy,  please call D.F. King,
the Information Agent, at 1-800-207-2872.
 
                                          Very truly yours,
 
                                          CHARLES K. BARBO
                                          GENERAL PARTNER OF THE GENERAL PARTNER
                                           OF EACH OF
                                           THE PARTNERSHIPS
<PAGE>
                    IDS/SHURGARD INCOME GROWTH PARTNERS L.P.
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. II
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. III
 
                         1201 THIRD AVENUE, SUITE 2200
                           SEATTLE, WASHINGTON 98101
 
                            ------------------------
 
                 NOTICE OF SPECIAL MEETINGS OF LIMITED PARTNERS
                       TO BE HELD ON               , 1996
 
                            ------------------------
 
TO THE LIMITED PARTNERS OF IDS/SHURGARD INCOME GROWTH PARTNERS L.P. ("IDS1"),
IDS/SHURGARD INCOME GROWTH PARTNERS L.P. II ("IDS2") AND IDS/SHURGARD INCOME
GROWTH PARTNERS L.P. III ("IDS3"):
 
    NOTICE IS HEREBY  GIVEN THAT  Special Meetings (the  "Special Meetings")  of
limited  partners in  each of  IDS1, IDS2  and IDS3,  each a  Washington limited
partnership (together, the "Partnerships"), will  be held on                   ,
1996,  at 10:00  a.m., local  time, at 1201  Third Avenue,  Suite 2200, Seattle,
Washington, to consider and vote upon approval of an Acquisition Agreement dated
as of July  1, 1996  (the "Acquisition  Agreement"), by  and among  each of  the
Partnerships  and Shurgard  Storage Centers,  Inc., a  Delaware corporation (the
"Company"), providing for the merger of  each of the Partnerships with and  into
the  Company  (the "Mergers").  Under the  Acquisition  Agreement, each  unit of
limited partnership interest ("Unit") of  each Partnership that participates  in
the Mergers will be converted into that number of shares of Class A Common Stock
of  the Company, par  value $.001 per  share, derived by  dividing the Net Asset
Value (as  defined in  the Acquisition  Agreement) per  Unit of  the  applicable
Partnership  by  the  Share Price  (as  defined in  the  Acquisition Agreement).
Approval of the Acquisition Agreement and the transactions contemplated  thereby
by  limited  partners  of a  Partnership  will, if  applicable,  also constitute
approval of those amendments to the Partnership's Amended and Restated Agreement
of Limited Partnership necessary to effect its respective Merger. THE CLOSING OF
EACH OF  THE MERGERS  IS NOT  CONDITIONED ON  THE CLOSING  OF ANY  OF THE  OTHER
MERGERS.
 
    UNITHOLDERS SHOULD CAREFULLY REVIEW THE ACCOMPANYING PROXY
STATEMENT/PROSPECTUS,  WHICH MORE FULLY  DESCRIBES THE TERMS  OF THE MERGERS AND
RELATED TRANSACTIONS. THE FULL TEXT OF THE ACQUISITION AGREEMENT IS ATTACHED  AS
APPENDIX A TO THE PROXY STATEMENT/PROSPECTUS.
 
    Limited    partners   as   of   the   date   of   the   accompanying   Proxy
Statement/Prospectus whose Units have not been purchased by the Company pursuant
to the  Company's cash  tender offers  commenced in  July 1996  are entitled  to
notice  of the Special Meetings. If Units of a Partnership are transferred after
the date of the accompanying Proxy Statement/Prospectus but prior to the date of
that Partnership's Special Meeting or  any adjournment or postponement  thereof,
and the new holders of the transferred Units are admitted as substituted limited
partners  of that Partnership, this Notice  of Special Meeting, the accompanying
Proxy  Statement/Prospectus  and  related  information  will  be  sent  to   the
substituted  limited  partners  along  with  notice  of  their  substitution and
admission. This substitution and admission will terminate the right of the prior
limited partners  to vote  on  approval of  the  Acquisition Agreement  and  the
transactions contemplated thereby, and any votes as to the transferred Units may
be made by the substituted limited partners.
 
    A  limited partner will be entitled to dissenters' rights in connection with
the Mergers if the limited partner properly exercises those rights under Section
25.10.900 et seq. of  the Washington Uniform Limited  Partnership Act. The  full
text   of   this   Section   is   attached   as   Appendix   E   to   the  Proxy
Statement/Prospectus.
<PAGE>
    Whether or not  you plan to  attend your Special  Meeting, please  complete,
sign  and date the  enclosed proxy card  and return it  promptly in the enclosed
postage prepaid envelope. Your prompt cooperation will be greatly appreciated.
 
                                          Very truly yours,
 
                                          CHARLES K. BARBO
                                          GENERAL PARTNER OF THE GENERAL PARTNER
                                           OF EACH OF
                                           THE PARTNERSHIPS
<PAGE>
INFORMATION   CONTAINED  HEREIN  IS  SUBJECT   TO  COMPLETION  OR  AMENDMENT.  A
REGISTRATION STATEMENT  RELATING TO  THESE SECURITIES  HAS BEEN  FILED WITH  THE
SECURITIES  AND EXCHANGE  COMMISSION. THESE SECURITIES  MAY NOT BE  SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR  TO THE TIME THE REGISTRATION STATEMENT  BECOMES
EFFECTIVE.  THIS  PROSPECTUS  SHALL  NOT  CONSTITUTE AN  OFFER  TO  SELL  OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE  SECURITIES
IN  ANY STATE IN WHICH SUCH OFFER,  SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.
<PAGE>
                   SUBJECT TO COMPLETION, DATED JULY 11, 1996
 
                         SHURGARD STORAGE CENTERS, INC.
                           PROXY STATEMENT/PROSPECTUS
                FOR THE SPECIAL MEETINGS OF LIMITED PARTNERS OF
                   IDS/SHURGARD INCOME GROWTH PARTNERS L.P.,
                IDS/SHURGARD INCOME GROWTH PARTNERS L.P. II AND
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. III
                      TO BE HELD ON                , 1996
 
    This Proxy Statement/Prospectus is  being furnished to  holders of units  of
limited  partnership  interest  ("IDS1  Units")  in  IDS/Shurgard  Income Growth
Partners L.P. ("IDS1"), holders of units of limited partnership interest  ("IDS2
Units")  in IDS/Shurgard Income Growth Partners  L.P. II ("IDS2") and holders of
units of limited partnership interest ("IDS3 Units," and together with the  IDS1
Units  and IDS2 Units, the "Units")  in IDS/Shurgard Income Growth Partners L.P.
III ("IDS3"),  each a  Washington limited  partnership, in  connection with  the
solicitation  of proxies to  be used at  the special meetings  of holders of the
Units (the  "IDS1 Special  Meeting," "IDS2  Special Meeting"  and "IDS3  Special
Meeting,"  respectively, and collectively, the "Special Meetings") to be held on
           , 1996, at 10:00 a.m., local time, at 1201 Third Avenue, Suite  2200,
Seattle,  Washington. The holders of  IDS1 Units, IDS2 Units  and IDS3 Units are
referred  to  as   the  "IDS1   Unitholders,"  "IDS2   Unitholders"  and   "IDS3
Unitholders,"  respectively, and collectively, as  the "Unitholders." IDS1, IDS2
and IDS3 are referred to collectively as the "Partnerships."
 
    At each of  the Special Meetings,  Unitholders of each  of the  Partnerships
will  be asked to  consider and vote  upon approval of  an Acquisition Agreement
dated as of  July 1, 1996  (the "Acquisition Agreement")  by and among  Shurgard
Storage Centers, Inc., a Delaware corporation (the "Company" or "SSCI"), and the
Partnerships, providing for the merger of each of the Partnerships with and into
the  Company (the "IDS1 Merger," "IDS2  Merger" and "IDS3 Merger," respectively,
and collectively, the "Mergers"). The  Acquisition Agreement provides that  upon
consummation  of the Mergers, each of the  IDS1 Units, IDS2 Units and IDS3 Units
(other than Units held by  the Company, which will  be cancelled, and Units,  if
any,  held by Unitholders who perfect dissenters' rights) will be converted into
the right to receive that  number of shares of Class  A Common Stock, par  value
$.001 per share, of the Company (the "Common Stock") derived by dividing the Net
Asset  Value (as defined herein) per Unit  of $257, $222 and $308, respectively,
by the average price of the Common Stock on the New York Stock Exchange during a
designated period  prior to  the  Special Meetings.  The Company  may,  however,
provide  additional cash consideration in certain circumstances. For purposes of
computing the number of shares of common  stock to be issued to Unitholders,  if
the  average price of  the Common Stock is  greater than $27.75  then it will be
deemed to be $27.75, and if the average  price of the Common Stock is less  than
$22.25  then  it  will be  deemed  to  be $22.25.  Approval  of  the Acquisition
Agreement by IDS2 Unitholders and IDS3 Unitholders will also constitute approval
of those  amendments  to  the  applicable  Partnership's  Amended  and  Restated
Agreement  of  Limited Partnership  (the  "Partnership Agreement")  necessary to
effect the applicable Merger. A copy of the Acquisition Agreement is attached as
Appendix A  to this  Proxy  Statement/Prospectus. The  closing  of each  of  the
Mergers  is not conditioned  upon the closing  of any of  the other Mergers. THE
GENERAL PARTNER OF EACH PARTNERSHIP  (THE "IDS1 GENERAL PARTNER," "IDS2  GENERAL
PARTNER"  AND  "IDS3  GENERAL  PARTNER,"  RESPECTIVELY,  AND  COLLECTIVELY,  THE
"GENERAL PARTNERS"), WHICH HAS SIGNIFICANT  CONFLICTS OF INTEREST IN  CONNECTION
WITH  THE  MERGERS,  RECOMMENDS  THAT  UNITHOLDERS  VOTE  FOR  APPROVAL  OF  THE
ACQUISITION AGREEMENT AND THE  TRANSACTIONS CONTEMPLATED THEREBY, INCLUDING  THE
MERGERS.
 
    SEE  "RISK FACTORS" BEGINNING ON PAGE  20 OF THIS PROXY STATEMENT/PROSPECTUS
FOR CERTAIN  FACTORS  WHICH  SHOULD  BE CONSIDERED  IN  EVALUATING  THE  MATTERS
DESCRIBED HEREIN. THESE FACTORS INCLUDE, AMONG OTHERS:
 
    - The  Company, the General  Partners and their  affiliates have significant
      conflicts of interest in connection with the Mergers, and no  unaffiliated
      representatives  were appointed to  negotiate the terms  of the Mergers on
      behalf of any of the Partnerships.
                                                        (CONTINUED ON NEXT PAGE)
                            ------------------------
 
THE SECURITIES ISSUABLE  PURSUANT TO THIS  PROXY STATEMENT/PROSPECTUS HAVE  NOT
 BEEN  APPROVED OR DISAPPROVED  BY THE SECURITIES  AND EXCHANGE COMMISSION OR
   ANY STATE SECURITIES  COMMISSION, NOR  HAS THE  SECURITIES AND  EXCHANGE
     COMMISSION  OR  ANY  STATE  SECURITIES  COMMISSION  PASSED  UPON  THE
      ACCURACY  OR  ADEQUACY  OF  THIS  PROXY  STATEMENT/PROSPECTUS.  ANY
                REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
                            ------------------------
 
          The date of this Proxy Statement/Prospectus is        , 1996
<PAGE>
(CONTINUED FROM PREVIOUS PAGE)
 
    -As a result of the Mergers, the nature of each Unitholder's investment will
     change from an interest in a specified portfolio of properties for a finite
     period to an investment in an ongoing fully-integrated real estate company,
     which  has a portfolio of properties that  may be changed from time to time
     without the approval of stockholders and  which does not plan to  liquidate
     its assets within a fixed period of time.
 
    -The  Mergers will be taxable events resulting in the recognition of gain or
     loss to Unitholders who are subject  to federal income tax, and no  special
     cash distribution will be made to Unitholders for the payment of any tax.
 
    -The  Mergers may affect the level  of distributions made to Unitholders who
     become stockholders,  with the  potential that,  depending upon  the  Share
     Price   (as  defined   herein),  some   Unitholders  may   receive  smaller
     distributions than they would receive  if the Mergers were not  consummated
     and they remained Unitholders.
 
    -The  properties of  the Partnerships may  appreciate in value  and might be
     able to  be liquidated  at  a later  date for  a  price which  would  yield
     Unitholders more consideration than they would receive in the Mergers.
 
    -The   Company  could  become   more  highly  leveraged   than  any  of  the
     Partnerships, resulting in an increase in  debt service and an increase  in
     the risk of default on its obligations.
 
    -The  consideration to  be received by  Unitholders is  based in substantial
     part on third  party appraisals of  the market value  of the  Partnerships'
     properties  as of December 31, 1995. Appraisals are opinions of value as of
     the date  specified,  are  subject  to  certain  assumptions  and  may  not
     represent  the  true worth  or realizable  value of  the properties  of the
     Partnerships. The  appraisals  do not  reflect  any change  that  may  have
     occurred  in the market value of  the properties subsequent to December 31,
     1995.
 
    -There can be no assurance  that the Company will  continue to qualify as  a
     real  estate  investment trust  ("REIT"). If  the Company  were to  fail to
     qualify as a REIT, its distributed income would be subject to two levels of
     taxation and would reduce the amount of cash available for distribution  to
     stockholders.
 
    -If  the average  price of  Common Stock for  the designated  period used to
     determine the Share Price is  less than $22.25 per  share or if the  market
     price  of the Common  Stock decreases after determination  of the number of
     Shares (as defined herein)  to be issued  in the Mergers  and prior to  the
     issuance  of  the  Shares,  the  market value  of  the  Shares  received by
     Unitholders in  the Mergers  may be  less  than the  Net Asset  Values  (as
     defined herein) of the Partnerships.
 
    -The  market price  of Common Stock  may decrease following  issuance of the
     Shares if there  is increased selling  activity or as  a result of  general
     market conditions or other factors.
 
    -Under  Washington law, a Unitholder will  be entitled to dissenters' rights
     of appraisal in connection  with a Merger only  if the Unitholder does  not
     vote in favor of that Merger and timely files a written demand for payment.
 
    The Common Stock is traded on the New York Stock Exchange (the "NYSE") under
the  symbol "SHU." On July 8, 1996, the closing price of the Common Stock on the
NYSE was $25.00. See "Distributions and Market Prices of Common Stock." There is
no established  trading market  for  the Units.  See "Distributions  and  Market
Prices of Units."
 
    This  Proxy Statement/Prospectus is  first being mailed on  or about       ,
1996 to Unitholders of record at the close of business on the date of this Proxy
Statement/Prospectus.
 
    NO  PERSON  IS  AUTHORIZED   TO  GIVE  ANY  INFORMATION   OR  TO  MAKE   ANY
REPRESENTATIONS  OTHER THAN THOSE  CONTAINED HEREIN AND, IF  GIVEN OR MADE, SUCH
INFORMATION MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE COMPANY  OR
THE  PARTNERSHIPS. THIS PROXY STATEMENT/PROSPECTUS  DOES NOT CONSTITUTE AN OFFER
TO SELL ANY  SECURITIES OTHER THAN  THE SECURITIES  TO WHICH IT  RELATES, OR  AN
OFFER  TO SELL OR  A SOLICITATION OF  AN OFFER TO  BUY ANY OF  THE SECURITIES TO
WHICH  THIS  PROXY  STATEMENT/PROSPECTUS  RELATES   TO  OR  BY  ANYONE  IN   ANY
JURISDICTION  IN WHICH THE OFFER  OR SOLICITATION IS NOT  AUTHORIZED OR IN WHICH
THE PERSON MAKING THE OFFER OR SOLICITATION IS NOT QUALIFIED TO DO SO OR TO  ANY
PERSON TO WHOM IT IS UNLAWFUL TO MAKE THE OFFER OR SOLICITATION.
 
                                       ii
<PAGE>
                             AVAILABLE INFORMATION
 
    The  Company  has filed  with the  Securities  and Exchange  Commission (the
"Commission")  a  Registration   Statement  on  Form   S-4  (the   "Registration
Statement") under the Securities Act of 1933, as amended (the "Securities Act"),
with respect to the shares of Common Stock to be issued upon consummation of the
Mergers.  This  Proxy  Statement/Prospectus,  which constitutes  a  part  of the
Registration Statement, does not  contain all the information  set forth in  the
Registration Statement and exhibits to the Registration Statement. Copies of the
Registration  Statement  and the  exhibits are  on  file at  the offices  of the
Commission and  may be  obtained, upon  payment of  the fees  prescribed by  the
Commission,  or may be examined without charge at the offices of the Commission.
All summaries of  agreements contained  in this  Proxy Statement/Prospectus  are
subject in all respects to the full text of such documents. Reference is made to
the  copies of  certain of  those documents  filed with  the Commission  for the
complete statement of their provisions.
 
    The Company  and each  of  the Partnerships  are  subject to  the  reporting
requirements  of the Securities Exchange Act  of 1934, as amended (the "Exchange
Act"), and, in accordance therewith, file reports and other information with the
Commission. Such reports  and other  information filed  by the  Company and  the
Partnerships  can be copied at the public reference facilities maintained by the
Commission at  450 Fifth  Street,  N.W., Washington,  D.C. 20549,  the  regional
offices  of the Commission  at 7 World  Trade Center, 13th  Floor, New York, New
York 10048, and Citicorp Center, Suite  1400, 500 West Madison Street,  Chicago,
Illinois 60661. Copies of such material can be obtained at prescribed rates from
the Public Reference Section of the Commission at its office in Washington, D.C.
Such  information for the  Company can also  be inspected at  the offices of the
NYSE, 20 Broad Street, New York, New York 10005.
 
    All  information   concerning   the   Company  contained   in   this   Proxy
Statement/Prospectus  has  been furnished  by  the Company  and  all information
concerning the Partnerships or the General Partners of the Partnerships has been
furnished by the applicable Partnership or General Partner. Neither the delivery
of this Proxy Statement/Prospectus nor any distribution of securities  hereunder
shall  under any circumstances be deemed to  imply that there has been no change
in the assets, properties or affairs of  the Company or any of the  Partnerships
since  the date hereof or that the information set forth herein is correct as of
any time subsequent to the date hereof.
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
    The following  documents  filed  with  the Commission  by  the  Company  are
incorporated by reference in this Proxy Statement/Prospectus:
 
        (i)  the Company's Quarterly  Report on Form 10-Q  for the quarter ended
    March 31, 1996;
 
        (ii) the  Company's  Annual Report  on  Form  10-K for  the  year  ended
    December 31, 1995;
 
       (iii)  the  description  of  Common  Stock  contained  in  the  Company's
    Registration Statement on Form 8-A, as amended, dated April 19, 1995; and
 
       (iv) the description of the Preferred Share Purchase Rights contained  in
    the  Company's Registration Statement  on Form 8-A,  as amended, dated April
    19, 1995.
 
    All documents filed by the Company  pursuant to Section 13(a), 13(c), 14  or
15(d)   of   the  Exchange   Act   subsequent  to   the   date  of   this  Proxy
Statement/Prospectus and prior  to the  date of  the Special  Meetings shall  be
deemed  to be  incorporated by  reference herein  from the  date of  filing such
documents. Any  statement contained  herein  or in  a document  incorporated  or
deemed  to be incorporated by reference herein shall be deemed to be modified or
superseded for purposes of this Proxy Statement/Prospectus to the extent that  a
statement  contained herein or in any  subsequently filed document which also is
or is deemed to be incorporated by reference herein modifies or supersedes  that
statement.  Any statement so modified or  superseded shall not be deemed, except
as  so  modified   or  superseded,   to  constitute   a  part   of  this   Proxy
Statement/Prospectus.
 
                                      iii
<PAGE>
    THIS  PROXY STATEMENT/PROSPECTUS  INCORPORATES DOCUMENTS  BY REFERENCE WHICH
ARE NOT PRESENTED HEREIN OR DELIVERED  HEREWITH. COPIES OF THESE DOCUMENTS  (NOT
INCLUDING  EXHIBITS  TO  THE  DOCUMENTS, UNLESS  THE  EXHIBITS  ARE SPECIFICALLY
INCORPORATED   BY   REFERENCE   INTO    THE   INFORMATION   THAT   THIS    PROXY
STATEMENT/PROSPECTUS  INCORPORATES)  WILL  BE PROVIDED  WITHOUT  CHARGE  TO EACH
PERSON, INCLUDING ANY BENEFICIAL OWNER, TO WHOM THIS PROXY  STATEMENT/PROSPECTUS
IS  DELIVERED,  UPON WRITTEN  OR ORAL  REQUEST. REQUESTS  SHOULD BE  DIRECTED TO
SHURGARD STORAGE CENTERS,  INC., INVESTOR  RELATIONS, 1201  THIRD AVENUE,  SUITE
2200, SEATTLE, WASHINGTON 98101 (TELEPHONE NUMBER: (206) 624-8100).
 
                              CAUTIONARY STATEMENT
 
    Statements  contained in this Proxy  Statement/Prospectus that are not based
on historical fact are  "forward-looking statements" within  the meaning of  the
Private  Securities  Litigation  Reform  Act  of  1995.  Certain forward-looking
statements are identified specifically in this Proxy Statement/ Prospectus while
other forward-looking statements may be identified by the use of forward-looking
terminology  such  as   "may,"  "will,"   "expect,"  "anticipate,"   "estimate,"
"continue"  or similar terms, variations of those terms or the negative of those
terms. Cautionary statements set forth in  "Risk Factors" and elsewhere in  this
Proxy  Statement/Prospectus identify  important factors that  could cause actual
results to differ materially from those in the forward-looking statements.
 
                                       iv
<PAGE>
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                                                               PAGE
                                                                                                             ---------
<S>                                                                                                          <C>
AVAILABLE INFORMATION......................................................................................        iii
 
INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE............................................................        iii
 
CAUTIONARY STATEMENT.......................................................................................         iv
 
SUMMARY....................................................................................................          1
  The Company..............................................................................................          1
  The Partnerships.........................................................................................          1
  The Special Meetings.....................................................................................          2
  The Mergers..............................................................................................          3
  General Partners' Reasons for Recommending the Mergers...................................................          4
  IPSC Consent.............................................................................................          4
  Risk Factors.............................................................................................          5
  Expected Benefits from the Mergers.......................................................................          7
  Alternatives to the Mergers..............................................................................          7
  Comparison of Merger Consideration to Alternatives.......................................................          8
  Fairness of the Mergers..................................................................................          9
  Third Party Opinions.....................................................................................         10
  Comparison of the Partnerships and the Company...........................................................         11
  Conflicts of Interest....................................................................................         13
  Amendments to Partnership Agreements.....................................................................         13
  Dissenters' Rights of Unitholders........................................................................         14
  Material Federal Income Tax Considerations...............................................................         14
  Accounting Treatment.....................................................................................         14
  Ownership Structure of the Partnerships..................................................................         15
 
SELECTED FINANCIAL INFORMATION OF THE COMPANY..............................................................         16
 
PRO FORMA CONSOLIDATED FINANCIAL DATA......................................................................         17
 
COMPARATIVE PER SHARE DATA.................................................................................         18
 
DISTRIBUTIONS AND MARKET PRICES OF COMMON STOCK............................................................         19
 
RISK FACTORS...............................................................................................         20
  Risks Relating to the Mergers............................................................................         20
  General Real Estate Investment Risks.....................................................................         22
  Risks Relating to Qualification and Operation as a REIT..................................................         25
  Other General Risks......................................................................................         26
 
THE SPECIAL MEETINGS.......................................................................................         27
  General..................................................................................................         27
  The IDS1 Special Meeting.................................................................................         27
  The IDS2 Special Meeting.................................................................................         28
  The IDS3 Special Meeting.................................................................................         29
  Solicitation of Proxies by Soliciting Agent..............................................................         30
  Information and Tabulation...............................................................................         31
 
BACKGROUND AND REASONS FOR THE MERGERS.....................................................................         31
  Background...............................................................................................         31
  Purposes and Structure of the Offers and the Mergers.....................................................         35
  General Partners' Recommendations and Reasons............................................................         36
  Expected Benefits From the Mergers.......................................................................         36
  Alternatives to the Mergers..............................................................................         38
</TABLE>
 
                                       v
<PAGE>
<TABLE>
<S>                                                                                                          <C>
FAIRNESS OF THE MERGERS....................................................................................         40
  Conclusions of the General Partners......................................................................         40
  Determination of Merger Consideration....................................................................         40
  Fairness of the Mergers to the Unitholders...............................................................         41
  Comparison of Merger Consideration to Alternatives.......................................................         42
  Distribution Comparison..................................................................................         45
  Conclusions of the Special Committee.....................................................................         46
 
THE ACQUISITION AGREEMENT..................................................................................         47
  The Mergers..............................................................................................         47
  Representation and Warranties............................................................................         48
  Conduct of Business Pending the Effective Time...........................................................         48
  IPSC Consent.............................................................................................         48
  Standstill Agreement.....................................................................................         48
  No Solicitation of Transactions..........................................................................         49
  Indemnification..........................................................................................         49
  Conditions Precedent to the Mergers......................................................................         49
  Termination..............................................................................................         50
  Fees and Expenses........................................................................................         51
  Effect of Termination....................................................................................         52
  Amendment................................................................................................         52
  Dissenters' Rights.......................................................................................         52
  Amendments to the Partnership Agreements.................................................................         52
  General Partner Undertaking..............................................................................         53
 
SOURCE AND AMOUNT OF FUNDS.................................................................................         53
 
APPRAISALS AND OPINIONS OF FINANCIAL ADVISORS..............................................................         54
  Portfolio Appraisals of the Partnerships' Properties.....................................................         54
  Opinion of the Partnerships' Financial Advisor...........................................................         57
  Opinion of the Company's Financial Advisor...............................................................         60
 
PRO FORMA CONSOLIDATED FINANCIAL STATEMENTS................................................................         65
 
COMPARISONS OF PARTNERSHIPS AND COMPANY....................................................................         69
 
CONFLICTS OF INTEREST......................................................................................         83
  Common Composition of General Partners...................................................................         83
  Overlaps Between Affiliates of the General Partners and Directors and Officers of the Company............         83
  Company Ownership of Units...............................................................................         83
  General Partner's Interest...............................................................................         83
  Management Agreements....................................................................................         84
  Ownership of Company Common Stock by Affiliates of the General Partners..................................         85
  Contingent Shares Agreement..............................................................................         85
  Absence of Independent Soliciting Agent; Indemnification.................................................         85
 
FIDUCIARY RESPONSIBILITY...................................................................................         85
  Directors and Officers of the Company....................................................................         85
  General Partners of the Partnerships.....................................................................         86
</TABLE>
 
                                       vi
<PAGE>
<TABLE>
<S>                                                                                                          <C>
BUSINESS AND PROPERTIES OF THE PARTNERSHIPS................................................................         87
  General..................................................................................................         87
  Employees and Property Management........................................................................         88
  IDS1.....................................................................................................         89
  IDS2.....................................................................................................         93
  IDS3.....................................................................................................         97
  Beneficial Ownership.....................................................................................        102
 
DISTRIBUTIONS AND MARKET PRICES OF UNITS...................................................................        103
  Partnership Distributions................................................................................        103
  Market Prices of Units...................................................................................        103
 
BUSINESS AND PROPERTIES OF THE COMPANY.....................................................................        108
  History of the Company...................................................................................        108
  The Properties...........................................................................................        108
 
DESCRIPTION OF CAPITAL STOCK...............................................................................        114
  Common Stock and Class B Common Stock....................................................................        114
  Preferred Stock..........................................................................................        117
  Restrictions On Transfers Of Capital Stock; Excess Stock.................................................        117
 
DISSENTERS' RIGHTS OF UNITHOLDERS..........................................................................        119
 
ESTIMATED TAXABLE GAIN OR LOSS.............................................................................        120
 
MATERIAL FEDERAL INCOME TAX CONSIDERATIONS.................................................................        121
  General..................................................................................................        121
  Opinion of Counsel.......................................................................................        121
  Tax Consequences of the Mergers..........................................................................        122
  Taxation of the Company as a REIT........................................................................        125
 
LEGAL MATTERS..............................................................................................        132
 
EXPERTS....................................................................................................        132
 
GLOSSARY OF TERMS..........................................................................................        133
 
INDEX TO FINANCIAL STATEMENTS..............................................................................        F-1
 
APPENDIX A -- Acquisition Agreement........................................................................        A-1
 
APPENDIX B -- Summary Portfolio Appraisal Report of Robert A. Stanger & Co., Inc. .........................        B-1
 
APPENDIX C -- Fairness Opinion of Robert A. Stanger & Co., Inc. ...........................................        C-1
 
APPENDIX D -- Fairness Opinion of Alex. Brown & Sons Incorporated .........................................        D-1
 
APPENDIX E -- Dissenters' Rights -- Section 25.10.900 et seq. of the Washington Uniform Limited Partnership
 Act.......................................................................................................        E-1
</TABLE>
 
                                      vii
<PAGE>
                                    SUMMARY
 
    THE  FOLLOWING  SUMMARY  IS  QUALIFIED  IN  ITS  ENTIRETY  BY  THE  DETAILED
INFORMATION APPEARING ELSEWHERE  IN THIS  PROXY STATEMENT/PROSPECTUS,  INCLUDING
THE   APPENDICES.   UNITHOLDERS  ARE   URGED  TO   CAREFULLY  READ   THIS  PROXY
STATEMENT/PROSPECTUS AND ITS APPENDICES IN  THEIR ENTIRETY BEFORE VOTING ON  THE
MATTERS  DISCUSSED HEREIN. SEE "GLOSSARY OF TERMS" BEGINNING ON PAGE 133 FOR THE
DEFINITIONS  OF  CERTAIN   OF  THE   CAPITALIZED  TERMS  USED   IN  THIS   PROXY
STATEMENT/PROSPECTUS.
 
THE COMPANY
 
    Shurgard  Storage Centers, Inc. is a fully integrated, self-administered and
self-managed real  estate investment  trust that  develops, acquires,  owns  and
manages  self storage centers.  The Company is  one of the  largest operators of
self storage centers in  the United States.  As of March  31, 1996, the  Company
owned  and operated, directly  and through its  subsidiaries and joint ventures,
178 self storage properties, containing approximately 11.7 million net  rentable
square  feet, which are located in over 20 major metropolitan areas in 19 states
and Europe. In addition,  the Company owns two  business parks and a  commercial
building.  The Company also manages, under  the "Shurgard" name, 86 self storage
centers containing approximately 4.6 million net rentable square feet, of  which
47  are owned by affiliates (including the properties owned by the Partnerships)
and 39 are  owned by nonaffiliates.  The Company  developed 71 of  its owned  or
managed  stores. For the quarter ended March  31, 1996, the self storage centers
owned by the Company had a  weighted average net rentable square foot  occupancy
rate  of approximately 88% and  a weighted average annual  rent per net rentable
square foot of $8.84.
 
    The Company began operations as a REIT through the consolidation on March 1,
1994 of 17 publicly held real estate limited partnerships (the  "Consolidation")
that  were  sponsored by  Shurgard Incorporated  (the "Management  Company"). On
March 24, 1995,  the Management Company  merged with and  into the Company  (the
"Management  Company  Merger"),  and the  Company  became  self-administered and
self-managed.
 
    The Company was  incorporated in Delaware  on July 23,  1993. The  Company's
executive  offices  are  located  at 1201  Third  Avenue,  Suite  2200, Seattle,
Washington 98101, and its telephone number is (206) 624-8100.
 
THE PARTNERSHIPS
 
    Each Partnership is  a publicly  held limited partnership  formed under  the
laws  of the State  of Washington for  the purpose of  acquiring, developing and
operating self storage centers and office and business parks. The  Partnerships'
storage  centers are designed  to offer high-quality  storage space for personal
and business  use  at a  competitive  price. The  Partnerships'  properties  are
managed  by the Company. All of  the Partnerships' properties are operated under
the "Shurgard" name. Each  Partnership's executive offices  are located at  1201
Third Avenue, Suite 2200, Seattle, Washington 98101, and the telephone number is
(206) 624-8100.
 
    IDS1.   IDS1 owns and operates eight self storage properties and holds a 70%
interest in Shurgard Joint Partners II ("SJP II"), which owns four self  storage
properties.  The remaining 30% interest in SJP II is held by the Company. The 12
properties, which are located in six states, contained approximately 764,000 net
rentable square  feet  (including 100%  of  the SJP  II  properties) and  had  a
weighted average net rentable square foot occupancy rate of approximately 88% as
of  March 31, 1996  and a weighted  average annual rent  per net rentable square
foot of  $8.88 for  the quarter  ended March  31, 1996.  IDS1 was  organized  on
September 29, 1987. See "Business and Properties of the Partnerships -- IDS1."
 
    IDS2.    IDS2 owns  and operates  eight self  storage properties.  The eight
properties, which are  located in five  states, contained approximately  538,000
net  rentable square feet  and had a  weighted average net  rentable square foot
occupancy rate of approximately 86% as of March 31, 1996 and a weighted  average
annual  rent per net rentable  square foot of $8.88  for the quarter ended March
31, 1996. IDS2 was organized on November 15, 1988. See "Business and  Properties
of the Partnerships -- IDS2."
 
                                       1
<PAGE>
    IDS3.   IDS3  owns and  operates 16 self  storage properties  and one office
building. The  17  properties, which  are  located in  seven  states,  contained
approximately  1,000,000 net rentable square feet and had a weighted average net
rentable square foot occupancy  rate of approximately 87%  as of March 31,  1996
and a weighted average annual rent per net rentable square foot of $7.92 for the
quarter  ended March  31, 1996.  IDS3 was  organized on  November 15,  1988. See
"Business and Properties of the Partnerships -- IDS3."
 
THE SPECIAL MEETINGS
 
    Each of the Special Meetings is scheduled to be held on             ,  1996,
at  10:00  a.m.,  local  time,  at  1201  Third  Avenue,  Suite  2200,  Seattle,
Washington. At  each of  the  Special Meetings,  including any  adjournments  or
postponements  thereof,  Unitholders will  be asked  to consider  and vote  on a
proposal to approve the Acquisition Agreement and the transactions  contemplated
thereby,  providing for the Merger of their respective Partnership with and into
the Company. Approval of the Acquisition Agreement by IDS2 Unitholders and  IDS3
Unitholders  will also constitute approval of those amendments to the applicable
Partnership's Partnership Agreement necessary  to effect its respective  Merger.
See  "The Special Meetings" and "The  Acquisition Agreement -- Amendments to the
Partnership Agreements." The closing of each  of the Mergers is not  conditioned
upon the closing of any of the other Mergers.
 
    For   each  Partnership,   Unitholders  as  of   the  date   of  this  Proxy
Statement/Prospectus whose Units have not been purchased by the Company pursuant
to the Offers  (as defined  below) are entitled  to notice  of their  respective
Special  Meeting. If Units  of a Partnership  are transferred after  the date of
this Proxy  Statement/Prospectus but  prior  to the  date of  the  Partnership's
Special  Meeting or any adjournment or  postponement thereof, and the holders of
the transferred Units  are admitted  as substituted Unitholders,  the Notice  of
Special Meeting, this Proxy Statement/Prospectus and related information will be
sent  to the substituted Unitholders along with notice of their substitution and
admission. This substitution and admission will terminate the right of the prior
Unitholders to  vote  on the  approval  of  the Acquisition  Agreement  and  the
transactions  contemplated thereby,  and any votes  as to  the transferred Units
must be made  by the substituted  Unitholders. Unitholders are  entitled to  one
vote  at their  respective Special  Meeting or  any adjournment  or postponement
thereof for each Unit of their Partnership held of record by them as of the date
of the Special Meeting or any adjournment or postponement thereof.
 
    For  each  Partnership,   Unitholders  holding   more  than   50%  of   that
Partnership's  Units,  in  person  or  by  proxy,  constitute  a  quorum  at the
applicable Special Meeting. For IDS1,  the affirmative vote of IDS1  Unitholders
holding  more than 75% of the outstanding  IDS1 Units is required to approve the
Acquisition Agreement and the  transactions contemplated thereby, including  the
IDS1  Merger. For  IDS2, the affirmative  vote of IDS2  Unitholders holding more
than 50% of the  outstanding IDS2 Units is  required to approve the  Acquisition
Agreement  and the transactions contemplated  thereby, including the IDS2 Merger
and the amendment to the IDS2  Partnership Agreement. For IDS3, the  affirmative
vote  of IDS3 Unitholders holding more than 50% of the outstanding IDS3 Units is
required to approve the Acquisition Agreement and the transactions  contemplated
thereby,  including the  IDS3 Merger and  the amendment to  the IDS3 Partnership
Agreement.
 
    As of the date of this Proxy Statement/Prospectus, there were  approximately
148,202  IDS1 Units outstanding  held by approximately  5,519 holders of record,
approximately 115,110 IDS2 Units outstanding held by approximately 3,989 holders
of record and approximately 119,215 IDS3 Units outstanding held by approximately
3,876 holders of record.
 
    As of the date of this Proxy Statement/Prospectus, the Company  beneficially
owns                IDS1 Units  (approximately      %),               IDS2 Units
(approximately    %) and           IDS3 Units (approximately    %). The  Company
intends  to vote such  Units for approval  of the Acquisition  Agreement and the
transactions contemplated thereby. The Company is  expected to be admitted as  a
substituted  Unitholder on October 1, 1996 with respect to those Units for which
it holds proxies.
 
                                       2
<PAGE>
THE MERGERS
 
    BACKGROUND.  Pursuant to the Acquisition Agreement, on              ,  1996,
the  Company  completed  (i)  a  cash  tender offer  for  up  to  65,000  of the
outstanding IDS1 Units by purchasing    or approximately    % of the outstanding
IDS1 Units at  $257 net per  IDS1 Unit (the  "IDS1 Offer"), (ii)  a cash  tender
offer  for up to  49,000 of the outstanding  IDS2 Units by  purchasing        or
approximately    % of the outstanding IDS2 Units at $222 net per IDS2 Unit  (the
"IDS2  Offer") and (iii) a cash tender offer for up to 52,000 of the outstanding
IDS3 Units by purchasing         or approximately     % of the outstanding  IDS3
Units  at $308 net per  IDS3 Unit (the "IDS3 Offer,"  and together with the IDS1
Offer and IDS2 Offer, the  "Offers"). The Offers were  made and the Mergers  are
being  proposed for  approval (i)  to enable the  Company to  acquire the entire
equity interest in  each of  the Partnerships and  (ii) to  give Unitholders  an
opportunity  (a)  to liquidate  their Units  for cash  in the  Offers or  (b) to
continue to own an economic interest in a portfolio of properties, including the
Partnerships' properties, through an  acquisition of an  equity interest in  the
Company in the Mergers.
 
    THE  MERGERS.   With respect to  each Partnership, upon  the satisfaction or
waiver of the conditions to closing relating to that Partnership, it will  merge
with  and into the Company, with the  Company continuing as the surviving entity
(the date of the Merger is referred to as the "Closing Date"). Each Unit of that
Partnership (other than Units owned  by the Company and  Units, if any, held  by
Unitholders  who perfect dissenters' rights under the Washington Uniform Limited
Partnership Act  (the  "WULPA"))  and  the general  partner  interest  (the  "GP
Interest")  in that Partnership will be converted  into the right to receive (i)
that number  of whole  shares of  Common Stock,  including associated  preferred
stock  purchase rights (the "Shares"), calculated  by dividing (a) the Net Asset
Value (as defined below) of the  applicable Partnership that would be  allocated
to  one Unit or the GP Interest, as the case may be, if the Net Asset Value were
distributed  in  a  dissolution  of  the  Partnership  in  accordance  with  its
Partnership  Agreement  (a "Dissolution")  by (b)  the  Share Price  (as defined
below),  (ii)  cash  in  lieu  of  a  fractional  Share  and  (iii)   Additional
Consideration (as defined below), if any, that would be allocated to one Unit or
the GP Interest, as the case may be, if such cash payments were distributed in a
Dissolution.  All Units owned by the Company will be cancelled upon consummation
of the Mergers. No certificates representing fractional Shares will be issued in
the Mergers, but cash will be paid in lieu thereof. The Shares to be issued  and
the  cash  to be  paid  in lieu  of  fractional shares  of  Common Stock  and as
Additional Consideration are referred to  as the "Merger Consideration." To  the
extent  that a Partnership's  Closing Net Asset  Value exceeds the Partnership's
Net Asset Value, the Partnership will make cash distributions to its  pre-Merger
Unitholders and General Partner in the amount of the difference.
 
    The  "Net Asset Value" of a  Partnership is equal to (i)  the sum of (a) the
appraised fair market value of the real  estate assets of the Partnership as  of
December  31, 1995  (the "Appraised Value")  set forth in  the Summary Portfolio
Appraisal Report dated June 26, 1996  (the "Appraisals"), prepared by Robert  A.
Stanger  &  Co.,  Inc. ("Stanger"),  which  reflected the  value  of in-progress
buildouts and unit conversions, and (b)  the book values of the non-real  estate
assets,  except for amortizable assets, of the Partnership as of March 31, 1996,
less (ii) the sum of (x) the Partnership's liabilities as of March 31, 1996, (y)
the estimated cost remaining  to be incurred  as of March  31, 1996 to  complete
in-progress  buildouts and unit conversions (the  value of which was included in
the Appraised Value) and (z) the estimated  costs of the Offers and the  Mergers
that  would be borne  by the Partnership pursuant  to the Acquisition Agreement,
assuming the applicable Merger is consummated.  See "Fairness of the Mergers  --
Conclusions   of  the  General   Partners"  and  "--   Determination  of  Merger
Consideration."
 
    The "Closing Net Asset Value"  of a Partnership is equal  to (i) the sum  of
(a)  the Appraised Value, (b) the cost incurred to the Closing Date of buildouts
and unit conversions, if  any, that were not  reflected in the Appraised  Value,
and  (c) the book values  of the non-real estate  assets, except for amortizable
assets, of the Partnership as of the Closing Date of the applicable Merger, less
(ii) the sum of (x)  the Partnership's liabilities as  of the Closing Date,  (y)
the estimated costs remaining to be
 
                                       3
<PAGE>
incurred,  if any,  as of the  Closing Date  to complete the  buildouts and unit
conversions that were included in the Appraised Value and (z) the  Partnership's
Individual  Expenses and pro  rata share of  Shared Expenses (as  such terms are
defined herein).
 
    The "Share Price" for a Partnership is equal to the average of the per share
closing prices of the Common Stock on the NYSE during the 20 consecutive trading
days ending on the fifth  trading day prior to the  date the General Partner  of
the  Partnership actually calls for the vote of the Partnership's Unitholders to
approve the applicable Merger (the "Vote Date"). If the Share Price, however, is
less than  $22.25 per  share, then  for purposes  of calculating  the number  of
Shares  to be issued in the applicable Merger, the Share Price will be deemed to
equal $22.25, and if the Share Price is greater than $27.75 per share, then  for
purposes  of calculating  the number  of Shares to  be issued  in the applicable
Merger, the Share Price will be deemed  to equal $27.75 (the range of $22.25  to
$27.75 is referred to as the "Share Price Range").
 
    In  the event the  Share Price exceeds $28.50  for a particular Partnership,
the Company has  the right  to terminate the  Acquisition Agreement  as to  that
Partnership.  In the event the Share Price  is less than $21.50 for a particular
Partnership,  the  General  Partner  of   that  Partnership  may  withdraw   its
recommendation  in favor of  the applicable Merger  or terminate the Acquisition
Agreement; provided, however,  that prior to  withdrawing its recommendation  or
terminating  the  Acquisition  Agreement  as to  that  Partnership,  the General
Partner, if so requested by the Company, must adjourn the Special Meeting of the
applicable Partnership for up to ten  business days and the General Partner  may
not withdraw its recommendation if, at least two business days prior to the date
of  the adjourned Special Meeting,  the Company agrees to  pay an amount of cash
equal to the difference between the actual Share Price and $21.50, multiplied by
the number of  Shares to  be issued in  the applicable  Merger (the  "Additional
Consideration").
 
GENERAL PARTNERS' REASONS FOR RECOMMENDING THE MERGERS
 
    THE  GENERAL PARTNER OF EACH PARTNERSHIP  RECOMMENDS THAT UNITHOLDERS OF THE
PARTNERSHIP VOTE FOR APPROVAL OF THE ACQUISITION AGREEMENT AND THE  TRANSACTIONS
CONTEMPLATED  THEREBY. This recommendation is  based upon each General Partner's
belief that (i) the terms of the respective Merger, when considered as a  whole,
are  fair  to the  Unitholders of  the respective  Partnership, (ii)  the Merger
Consideration  being  offered  in  exchange  for  the  Units  constitutes   fair
consideration  for the  interests of the  Unitholders and  (iii) after comparing
certain potential benefits and detriments of the respective Merger with those of
several  alternatives,  the  respective  Merger   is  more  attractive  to   the
Unitholders  than the  alternatives. These beliefs  are based  upon each General
Partner's analysis of  the terms  of the  respective Merger,  assessment of  the
respective  Merger's potential economic impact  upon the Unitholders, comparison
of certain  potential  benefits and  detriments  of the  respective  Merger  and
several  alternatives  to  the respective  Merger  and review  of  the financial
condition and performance of the respective Partnership and the Company and  the
terms of material agreements by which they are bound.
 
IPSC CONSENT
 
    Pursuant  to the  Agreement of  Limited Partnership  of each  of the General
Partners (the "GP  Agreements"), the  general partners  of each  of the  General
Partners  may not have authority  to approve the Mergers  without the consent of
IDS Partnership Services Corporation, a limited  partner of each of the  General
Partners  which is not affiliated with the Company ("IPSC"). Based on its review
of documents, the General  Partners' review of alternatives  to the Mergers  and
the Stanger Fairness Opinions (as defined below), IPSC consented to the Mergers.
IPSC has certain conflicts of interest in the Mergers and tendered in the Offers
the  Units it  had owned.  See "The Acquisition  Agreement --  IPSC Consent" and
"Conflicts of Interest."
 
                                       4
<PAGE>
RISK FACTORS
 
    In evaluating  the Mergers  and the  Company, Unitholders  should  carefully
consider  the factors  discussed under "Risk  Factors." Some  of the significant
factors include:
 
    RISKS RELATING TO THE MERGERS
 
    - The Company, the  General Partners and  their affiliates have  significant
      conflicts of interest in connection with the Mergers.
 
    - The  interests of the Unitholders  have not been independently represented
      in structuring  and negotiating  the terms  of the  Mergers; had  separate
      representation been arranged for the Unitholders, the terms of the Mergers
      might have been different.
 
    - As  a result  of the Mergers,  the nature of  each Unitholder's investment
      will change from an interest in a specified portfolio of properties for  a
      finite  period to an investment in an ongoing fully-integrated real estate
      company, which has a portfolio of properties that may be changed from time
      to time without the  approval of stockholders and  which does not plan  to
      liquidate its assets within a fixed period of time.
 
    - The   Mergers  will  be  treated  as  taxable  events,  resulting  in  the
      recognition by all non-tax-exempt Unitholders of either taxable income  or
      loss,  and no special cash  distributions will be made  for the payment of
      any tax.
 
    - The Mergers are  expected to  affect the  level of  distributions made  to
      Unitholders  who become  stockholders of  the Company.  Depending upon the
      Share Price used to  determine the number  of Shares to  be issued in  the
      Mergers,  the level of distributions after  the Mergers to Unitholders who
      have  become  Company  stockholders  may  be  lower  than  the  level   of
      distributions received with respect to their Units prior to the Mergers.
 
    - The  consideration to be  received by Unitholders  is based in substantial
      part on third party  appraisals of the market  value of the  Partnerships'
      properties as of December 31, 1995. Appraisals are opinions of value as of
      the  date  specified,  are  subject to  certain  assumptions  and  may not
      represent the true  worth or  realizable value  of the  properties of  the
      Partnerships.  The  appraisals do  not reflect  any  change that  may have
      occurred in the market value of the properties subsequent to December  31,
      1995.
 
    - If  the average price  of Common Stock  for the designated  period used to
      determine the Share Price is less than  $22.25 per share or if the  market
      price  of the Common Stock decreases  after determination of the number of
      Shares to  be issued  in the  Mergers and  prior to  the issuance  of  the
      Shares,  the market  value of  the Shares  received by  Unitholders in the
      Mergers may be less than the Net Asset Values of the Partnerships.
 
    - The market price of  Common Stock may decrease  following issuance of  the
      Shares  if there is increased  selling activity or as  a result of general
      market conditions or other factors.
 
    - The properties of the  Partnerships may appreciate in  value and might  be
      able  to  be liquidated  at a  later date  for a  price which  would yield
      Unitholders more consideration than they would receive in the Mergers.
 
    - The  Company  could  become  more   highly  leveraged  than  any  of   the
      Partnerships,  resulting in an increase in debt service and an increase in
      the risk of default on its obligations.
 
    GENERAL REAL ESTATE INVESTMENT RISKS
 
    - The Company is subject to general risks relating to real estate  ownership
      and operation of self storage centers, including the fact that real estate
      investments  are  generally  illiquid,  as  well  as  the  risks  normally
      associated  with  changes  in  market  rental  rates  and  the  impact  of
      environmental protection laws.
 
                                       5
<PAGE>
    - The  Company  is subject  to  risks of  real  estate development,  such as
      problems in obtaining necessary permits  and approvals, cost overruns  and
      delays in construction, and difficulties and delays in property lease-up.
 
    - The  Company is authorized to invest  in commercial real estate other than
      self storage centers, exposing  the Company to the  risks unique to  these
      investments  which may be  different than the  risks of being  in the self
      storage business.
 
    - The Company  may  acquire indirect  interests  in real  estate,  including
      interests  outside  the  United  States,  through  investments  in limited
      partnerships, joint  ventures,  participating mortgages  and  other  legal
      entities, exposing the Company not only to the risk of the underlying real
      estate  investments but also currency risks  and risks associated with the
      entity owning the real estate.
 
    - The Company is not  expected to have substantial  interests in other  real
      estate  investments to hedge  against the risk  that national trends might
      adversely affect the profitability of self storage facilities.
 
    - Competition may adversely affect the occupancy levels and rental rates  of
      the Company's properties.
 
    - Limited  potential  for  significant occupancy  gains  indicates  that any
      future increases in revenue from  self storage centers currently owned  by
      the Company will be primarily the result of rental rate increases.
 
    - Possible  liability  relating  to  environmental  matters,  including  the
      presence of hazardous substances on  a property, may adversely affect  the
      Company's  ability to sell the property or to borrow using the property as
      collateral, and may cause the Company to incur substantial remediation  or
      other costs, such as liabilities resulting from a claim by a private party
      for  personal injury or a claim by an adjacent property owner for property
      damage.
 
    - The Company  may be  required to  make capital  expenditures for  building
      alterations  to comply with the Americans  with Disabilities Act, fire and
      safety regulations, building codes and other land use regulations.
 
    - Real property taxes on  properties owned or developed  or acquired in  the
      future by the Company may increase as property tax rates change and as the
      properties are assessed or reassessed by tax authorities.
 
    RISKS RELATING TO QUALIFICATION AND OPERATION AS A REIT
 
    - There  can be no assurance that the  Company will continue to qualify as a
      REIT. If the Company were  to fail to qualify  as a REIT, its  distributed
      income  would be subject  to two levels  of taxation and  would reduce the
      amount of cash available for distribution to stockholders.
 
    - The Company  may have  taxable  income in  excess  of cash  available  for
      distribution, and may be required to borrow money or liquidate investments
      in order to meet the distribution requirements necessary to REIT status.
 
    - Legislation,  new  regulations,  administrative  interpretations  or court
      decisions may  significantly  change the  tax  laws with  respect  to  the
      Company's  qualification as a REIT or  the federal income tax consequences
      of such qualification.
 
    OTHER GENERAL RISKS
 
    - The Company manages  86 self  storage properties (including  those of  the
      Partnerships)  under contracts  that generally  may be  terminated without
      cause on 60 days' notice. If these contracts were terminated, the  Company
      would lose management fees and other income and would experience decreased
      economies of scale.
 
                                       6
<PAGE>
    - Market  interest rates may  increase, resulting in  higher yields on other
      financial instruments, which  could adversely affect  the market price  of
      the Common Stock.
 
EXPECTED BENEFITS FROM THE MERGERS
 
    The  following highlights the  primary benefits the  Mergers are expected to
generate for the Unitholders:
 
    - The Company, unlike  the Partnerships, may  be able to  take advantage  of
      attractive  real estate acquisition  and development opportunities subject
      to its ability to raise additional equity capital or debt.
 
    - As a larger entity with Common Stock  listed on the NYSE, the Company  has
      access  to  debt  and  equity  markets  that  are  not  available  to  the
      Partnerships.
 
    - The Company's  real  estate portfolio  is  substantially larger  and  more
      geographically   diverse  than  any  of  the  Partnerships,  reducing  the
      dependence of  an  investment in  the  Company  on the  performance  of  a
      particular asset or group of assets.
 
    - Unitholders  will receive publicly  traded securities listed  on the NYSE,
      enabling Unitholders to liquidate their  investment in the public  trading
      market to meet personal financial planning objectives.
 
    - The elimination of legal boundaries between the Partnerships through their
      consolidation  into  a  single  commonly  managed  company  will eliminate
      conflicts of interest among the Partnerships and between the  Partnerships
      and the Company as property manager.
 
    - Tax  filing for investors is simplified because Company tax information is
      included on Form 1099-DIV rather than the more complicated Schedule K-1.
 
ALTERNATIVES TO THE MERGERS
 
    The following is a  brief discussion of certain  benefits and detriments  of
alternatives to the Mergers that were considered by the General Partners.
 
    LIQUIDATION.   An alternative to the Mergers would be liquidating the assets
of the Partnerships and distributing the net liquidation proceeds to the General
Partners  and  Unitholders.  Liquidating   the  Partnerships  would  result   in
concluding  the investors' investment in the Partnerships within the anticipated
liquidation timeframes  for  certain  of the  properties  in  the  Partnerships'
portfolios  and somewhat earlier than the anticipated liquidation timeframes for
other properties. The liquidations would result in the marketplace  establishing
the  fair market value of the Partnerships' assets. The General Partners believe
that the Mergers are a more attractive alternative than liquidation because  the
Mergers permit Unitholders to participate in the Company's substantially larger,
more  diversified investment portfolio, to benefit from the Company's ability to
access capital  markets and  to take  advantage of  acquisition and  development
opportunities.  In addition, the estimated transaction costs associated with the
Mergers are significantly less  than would be incurred  in a liquidation of  the
Partnerships' assets.
 
    CONTINUATION  OF PARTNERSHIPS.  Another alternative  to the Mergers would be
to continue each  of the Partnerships  as a separate  legal entity.  Unitholders
would continue to receive regular quarterly distributions, which are expected to
improve in the foreseeable future. Also, continuation of the Partnerships avoids
those  disadvantages which might be inherent in the Mergers. See "Risk Factors."
The primary  disadvantage with  continuing the  Partnerships is  the failure  to
secure the benefits that the General Partners expect to result from the Mergers.
See  "Background  and  Reasons  for  the  Mergers--Expected  Benefits  From  the
Mergers." If the Partnerships continue, Unitholders may not have an  opportunity
for  liquidity in the near future and there can be no assurance that Unitholders
will be able to sell their Units  for consideration as attractive as the  Merger
Consideration.
 
    SUPPORT  OF  SECONDARY  MARKET.    Another  alternative  which  would create
liquidity for  Unitholders  desiring to  dispose  of their  investments  in  the
Partnerships  would be  a creation  or support of  the secondary  market for the
Units through  limited  cash  tender offers  or  repurchase  programs  sponsored
 
                                       7
<PAGE>
by  the Partnerships. While  the General Partners  believe that this alternative
might provide  liquidity for  some  Unitholders, the  terms of  the  Partnership
Agreements  and federal tax laws effectively prevent this alternative from being
available with respect to a  majority of the Units  in any 12-month period.  The
General  Partners  believe  that  the  benefits  of  this  alternative  are  not
sufficiently broad-based  to  provide  an  overall  solution  to  the  liquidity
problem.  While  this alternative  was considered  by  the General  Partners, no
detailed financial analysis was  done that would allow  the General Partners  to
predict  with any degree of certainty the possible impact of this alternative on
the value of the Units.
 
    REORGANIZATIONS OF PARTNERSHIPS AS SEPARATE REITS.  Reorganizing each of the
Partnerships as a separate corporation taxed as a REIT could provide Unitholders
with some of the advantages to be secured through the Mergers, such as providing
investors in the reorganized entities with some liquidity through the listing of
their equity securities in  a recognized trading  market and simplified  federal
income  tax reporting. In addition, these reorganizations could be effected on a
tax-free  basis,  unlike  the  Mergers,   which  will  be  taxable  events   for
Unitholders.  The reorganizations of the  Partnerships would, however, result in
substantial costs  and expenses,  and, due  to the  sizes of  the  Partnerships,
access  to  capital  markets  and the  liquidity  of  the  reorganized entities'
securities could  be limited.  The General  Partners believe  that the  separate
REITs  would  not  provide,  or  would provide  on  a  more  limited  basis, the
advantages expected from the Mergers.
 
COMPARISON OF MERGER CONSIDERATION TO ALTERNATIVES
 
    To assist Unitholders in evaluating the Mergers, the General Partner of each
Partnership has  attempted to  compare  the Merger  Consideration with  (i)  the
prices  at which the Units have been sold in the illiquid secondary market, (ii)
estimates of the value  of the Units  on a liquidation  basis assuming that  the
Partnership's  assets were sold at  their Appraised Value or  net book value and
the  net  proceeds  distributed  to  the  General  Partner  and  Unitholders  in
accordance  with the applicable Partnership Agreement and (iii) estimates of the
value of  the Units  on a  going  concern basis  assuming that  the  Partnership
continued  as an operating business and its assets were sold at the end of 2000.
Due to the uncertainty in establishing  these values, each General Partner  has,
in  instances it deemed appropriate, established a range of potential values for
each  alternative,  representing  a  high  and  low  value  for  the   potential
consideration.  NO ASSURANCE  CAN BE  GIVEN THAT  THE RANGE  OF POTENTIAL VALUES
INDICATED ESTABLISHES THE HIGHEST OR LOWEST POSSIBLE VALUE.
 
    The results of this comparative analysis are summarized in the table  below.
The  estimated  values  are based  upon  information available  to  each General
Partner at  the  time  they  were  computed,  including  historical  information
regarding  the applicable Partnership and current real estate markets, and there
can be no assurance  that the same  conditions analyzed by  each of the  General
Partners  in  arriving at  the estimates  of value  would exist  at the  time of
consummation of the Mergers. In addition,  the estimated values assigned to  the
alternatives  are based on a variety of assumptions made by each General Partner
that relate, among other things, to (i)  the Share Price as of the Closing  Date
for  the applicable Merger being within  the Share Price Range, (ii) projections
as  to  the  Partnership's  future  revenues,  expenses,  cash  flow  and  other
significant  financial matters, (iii) the capitalization rates that will be used
by prospective buyers when the Partnership's assets are liquidated, (iv) selling
costs, (v)  appropriate  discount rates  to  apply  to expected  cash  flows  in
computing the present value of the cash flows and (vi) the manner of sale of the
Partnership's properties.
 
    The  estimated values presented in  the following table are "forward-looking
statements" within
the meaning of  the Private  Securities Litigation  Reform Act  of 1995.  Actual
results may vary from those set forth below based on numerous factors, including
interest  rate fluctuations, changes in capitalization rates used by prospective
purchasers, tax law changes,  increased supply of or  decreased demand for  self
storage  facilities leading to lower occupancy  rates or lower rental rates, the
manner in
 
                                       8
<PAGE>
which the  properties are  sold and  the related  selling costs  and changes  in
availability of capital to finance acquisitions of self storage properties. Each
Unit in the following table represents an original investment of $250.
 
<TABLE>
<CAPTION>
                                                                              ESTIMATED LIQUIDATION
                                                                                  VALUE PER UNIT
                                    SECONDARY          ESTIMATED GOING         ASSUMING PARTNERSHIP
                                   MARKET PRICE         CONCERN VALUE            ASSETS SOLD AT:
                  MERGER           PER UNIT (2)          PER UNIT (3)      ----------------------------
               CONSIDERATION   --------------------  --------------------     APPRAISED      NET BOOK
PARTNERSHIP    PER UNIT (1)      HIGH        LOW       HIGH        LOW        VALUE (4)      VALUE (5)
- ------------  ---------------  ---------  ---------  ---------  ---------  ---------------  -----------
<S>           <C>              <C>        <C>        <C>        <C>        <C>              <C>
IDS 1            $     257     $     198  $     150  $     251  $     235     $     253      $     175
IDS 2                  222           185        162        218        203           217            183
IDS 3                  308           200        165        304        283           299            192
</TABLE>
 
- ------------------------
(1)  Assumes  the  Share Price  is  within  the Share  Price  Range.  The Merger
    Consideration is payable in  Shares and cash in  lieu of fractional  Shares.
    See "Fairness of the Mergers -- Determination of Merger Consideration."
 
(2)  The secondary  market prices  are those reported  to Stanger  for the first
    calendar quarter of 1996. See "Distributions  and Market Prices of Units  --
    Market Prices of Units."
 
(3)  The going concern  value estimates are  based upon a  number of assumptions
    regarding the  future net  operating income  and cash  distributions of  the
    Partnership  and assume a disposition of the Partnership's assets at the end
    of 2000. See "Fairness of the Mergers -- Comparison of Merger  Consideration
    to Alternatives -- Going Concern Values."
 
(4)  Estimated Liquidation Value at Appraised  Value is based primarily upon the
    Appraisals and adjustments  for non-real estate  assets and liabilities  and
    estimated  selling  costs. See  "Fairness of  the  Mergers --  Comparison of
    Merger Consideration to Alternatives -- Liquidation Values."
 
(5) Estimated Liquidation Value at  Net Book Value is  computed as of March  31,
    1996,  less  estimated  selling  costs.  See  "Fairness  of  the  Mergers --
    Comparison of Merger Consideration to Alternatives -- Liquidation Values."
 
FAIRNESS OF THE MERGERS
 
    The General  Partner of  each Partnership  believes that  the terms  of  the
applicable  Merger, when considered as  a whole, are fair  to the Unitholders of
the Partnership and the Merger Consideration  offered in exchange for the  Units
of  the  Partnership constitutes  fair consideration  for  the interests  of the
Unitholders. The following  provides a  summary of  the factors  upon which  the
General  Partners based their conclusions as to  the fairness of the Mergers and
the Merger Consideration to be received by Unitholders. The General Partners did
not find it practicable to, and did not attempt to, quantify or otherwise assign
relative weights to these factors in reaching their determinations.
 
    - The Merger Consideration is determined based upon the Net Asset Values  of
      the  Partnerships, which Net  Asset Values were,  in turn, based primarily
      upon the independently appraised values of  the real estate assets of  the
      Partnerships.
 
    - Stanger  has opined as to the fairness, from a financial point of view, of
      the Merger Consideration to the Unitholders.
 
    - The Share Price, which  is used to  determine the number  of Shares to  be
      received  by Unitholders in the Mergers, is based upon a 20-day average of
      the per share  closing prices  of the Common  Stock on  the NYSE,  thereby
      reducing the likelihood that the Share Price will be artificially inflated
      or affected by general market volatility.
 
    - If  the Share Price is below $21.50 for a Partnership, the General Partner
      of that  Partnership  may withdraw  its  recommendation in  favor  of  the
      applicable  Merger  or  terminate  the Acquisition  Agreement  as  to that
      Partnership unless the Company elects to pay the Additional  Consideration
      in accordance with the provisions of the Acquisition Agreement.
 
                                       9
<PAGE>
    - The General Partners compared certain potential benefits and detriments of
      the  Mergers  with certain  potential benefits  and detriments  of several
      alternatives to the  Mergers, including liquidation  of the  Partnerships,
      continuation  of the  Partnerships, support  of secondary  markets for the
      Units of  each  Partnership and  reorganizations  of the  Partnerships  as
      separate  corporations taxed as  REITs. Based upon  these comparisons, the
      General  Partners  believe  the  Mergers  are  more  attractive  than  the
      alternatives.
 
    - Certain  Merger  expenses are  considered  shared expenses  and  have been
      allocated  equally  between  the  Company,  on  the  one  hand,  and   the
      Partnerships,   on  the  other  hand,  and  certain  Merger  expenses  are
      considered individual  expenses to  be  paid by  the party  incurring  the
      expenses.   Merger  expenses   allocated  to  the   Partnerships  will  be
      apportioned to  the  Partnerships  based upon  their  relative  Net  Asset
      Values.
 
    - If  the  Closing Net  Asset Value  of  a Partnership  is greater  than the
      Partnership's Net Asset Value, the  difference will be distributed to  the
      pre-Merger   Unitholders  and  General  Partner   of  the  Partnership  in
      accordance with the applicable Partnership Agreement.
 
    - The General Partners have followed the original distribution provisions of
      the Partnership Agreements  in allocating the  Merger Consideration  among
      the Unitholders and General Partner of each Partnership.
 
    - Unitholders   who  are  opposed  to  the  Mergers  who  properly  exercise
      dissenters' rights under  the WULPA  will be  entitled to  receive a  cash
      payment equal to the fair value of their Units.
 
    - The  General Partners, the  Company and their  affiliates have significant
      conflicts of interest in connection with the Mergers, and no  unaffiliated
      representatives  were appointed to  negotiate the terms  of the Mergers on
      behalf of any of the Partnerships. The General Partners believe,  however,
      that  their determination regarding the fairness  of the Mergers was based
      upon the proper exercise  of their fiduciary  duties, unaffected by  these
      conflicts of interest.
 
THIRD PARTY OPINIONS
 
    THE  APPRAISALS.   The Partnerships  retained Stanger  to appraise  the fair
market value of  each Partnership's  real estate  portfolio as  of December  31,
1995.  In  preparing the  Appraisals,  Stanger collected  from  the Partnerships
information regarding the  operating history of  the properties, conducted  site
inspections of all of the Partnerships' properties in March 1996 and interviewed
and relied on representations of certain representatives of the Partnerships and
the Company as property manager. Stanger's conclusions are based upon conditions
Stanger  observed  at  the  properties during  its  inspection  and assumptions,
qualifications and limitations Stanger deemed reasonable at the time concerning,
among other things, legal  title, the absence of  physical defects or  hazardous
materials,  future  occupancy,  income  and  competition  with  respect  to each
property.  The  Appraisals  reflect  Stanger's  valuation  of  the  real  estate
portfolios  of the Partnerships as  of December 31, 1995,  in the context of the
information available  on  that  date  as  well  as  the  operating  information
available as of March 31, 1996. Events occurring subsequent to December 31, 1995
could  affect the properties  and assumptions used  in preparing the Appraisals.
The Summary  Portfolio Appraisal  Report  for the  Partnerships is  attached  as
Appendix  B to this Proxy Statement/Prospectus.  See "Appraisals and Opinions of
Financial Advisors -- Portfolio Appraisals of the Partnerships' Properties."
 
    STANGER FAIRNESS OPINION.   The  Partnerships have obtained  from Stanger  a
written  opinion  dated July  1, 1996  (the "Stanger  Fairness Opinion")  to the
effect  that,  as  of  the  date  thereof,  and  subject  to  the   assumptions,
qualifications  and  limitations  contained  therein,  the  consideration  to be
received by  Unitholders in  the Mergers  is  fair to  the Unitholders  of  each
Partnership  from  a financial  point  of view.  The  full text  of  the Stanger
Fairness Opinion is attached as  Appendix C to this Proxy  Statement/Prospectus.
Stanger  was not requested  to, and therefore  did not (i)  select the method of
determining  the  consideration   offered  in   the  Mergers,   (ii)  make   any
recommendation to the Unitholders of the Partnerships with respect to whether to
approve  or reject the Mergers  or (iii) express any  opinion as to the business
decision   to   effect   the   Mergers   or   alternatives   to   the   Mergers,
 
                                       10
<PAGE>
the  tax implications  of the  Mergers, the  allocation of  Merger expenses, the
fairness of the Merger Consideration to be received in the Mergers if the actual
Share Price is lower than the low  end of the Share Price Range, the  allocation
of  expenses associated with the Mergers  between and among the Partnerships and
the  Company,  or  any  other  terms  of  the  Mergers  other  than  the  Merger
Consideration  to be  received by Unitholders.  The Stanger  Fairness Opinion is
based upon business,  economic, real  estate and securities  markets, and  other
conditions  as  of July  1,  1996, and  does not  reflect  any changes  in those
conditions that may have occurred since that date. See "Appraisals and  Opinions
of Financial Advisors -- Opinion of the Partnerships' Financial Advisor."
 
COMPARISON OF THE PARTNERSHIPS AND THE COMPANY
 
    The summary information below highlights a number of significant differences
between  the Partnerships and the Company.  See "Comparisons of Partnerships and
Company."
 
    FORM OF ORGANIZATION.   The Partnerships and the  Company are each  vehicles
appropriate  for holding real  estate investments and  afford passive investors,
such as  Unitholders  and  stockholders,  certain  benefits,  including  limited
liability,  a professionally managed portfolio and the avoidance of double-level
taxation on distributed income. The Partnerships are under the control of  their
respective  General  Partners, while  the Company  is governed  by its  Board of
Directors. In addition, there are  significant differences in the tax  treatment
of  the Partnerships as partnerships and the Company as a REIT. See "Comparisons
of Partnerships and Company -- Taxation  of Taxable Investors" and "--  Taxation
of Tax-Exempt Investors."
 
    LENGTH  OF  INVESTMENT.   Unitholders  in  each of  the  Partnerships expect
liquidation of  their  investments  when  the  assets  of  the  Partnership  are
liquidated.  In contrast, the Company  does not expect to  dispose of its assets
within any prescribed periods and,  in any event, plans  to retain the net  sale
proceeds  for future investments. Stockholders are expected to achieve liquidity
for their investments by trading shares of the Common Stock in the public market
and not through the liquidation of the Company's assets.
 
    NATURE OF INVESTMENT.  Both the Units and Shares represent equity  interests
entitling  the holders thereof to participate  in the growth of the Partnerships
and the Company, respectively. Distributions and dividends payable with  respect
to  the Units and Shares depend upon the performance of the Partnerships and the
Company, respectively.
 
    PROPERTIES  AND  DIVERSIFICATION.    The  real  estate  portfolio  of   each
Partnership  was limited to the assets acquired with its initial equity offering
and  limited  debt  financing.  The  Company  holds  a  real  estate   portfolio
substantially  larger  and more  diversified than  the portfolio  of any  of the
Partnerships and with the  potential for future  growth through acquisition  and
development.  An investment in the Company should not be viewed as an investment
in a specific pool of  assets, but instead as an  investment in an ongoing  real
estate  investment business, subject to the  risks normally attendant to ongoing
real estate ownership and to the risks related to property development.
 
    PERMITTED INVESTMENTS.  The Company  and the Partnerships have  concentrated
their  investments almost solely in self  storage facilities. The Amended Bylaws
of the Company (the "Bylaws") authorize it to make other commercial real  estate
investments  (including outside of the United States) or mortgage loans, secured
by collateral of  a type in  which the Company  is permitted to  invest, if  the
Board  of  Directors  makes  certain  determinations  required  by  the  Bylaws.
Accordingly,  the  Company's  investments  may  be  more  diversified  than  the
investments  of the Partnerships. The  investment diversification, if it occurs,
while potentially serving  as a  hedge against  the risk  of having  all of  the
Company's  investments limited to a single asset group, would expose the Company
to the risk of owning and operating  assets not directly related to its  primary
business.
 
    ADDITIONAL  EQUITY.    As  the  Partnerships  are  not  authorized  to issue
additional Units  or  other equity  interests,  the  Units are  not  subject  to
dilution,  except as  provided in the  Partnership Agreements.  In contrast, the
Company has  substantial flexibility  to  raise equity  capital to  finance  its
businesses  and  affairs through  the sale  of  equity securities.  The Company,
through the issuance of
 
                                       11
<PAGE>
new equity securities,  may substantially expand  its capital base  to make  new
real  estate investments.  The issuance of  additional equity  securities by the
Company may  dilute the  interests of  stockholders and  the Company  may  issue
Preferred Stock with priorities or preferences over Common Stock with respect to
dividends and liquidation proceeds.
 
    BORROWING  POLICIES.   In conducting  its business,  the Company  may borrow
funds subject to the limitations on indebtedness contained in the Bylaws of  50%
of  its total assets and 300% of its adjusted net worth. The Company may be more
highly leveraged than  any of the  Partnerships. Borrowing funds  may allow  the
Company  to  substantially expand  its asset  base, but  will also  increase the
Company's risks due to its leveraged investments.
 
    RESTRICTIONS  ON  RELATED  PARTY  TRANSACTIONS.    Except  for  transactions
specifically approved in the Partnership Agreements (and which were disclosed in
the  disclosure documents prepared for the offering  and sale of the Units), the
Partnerships are  not authorized  to enter  into transactions  with the  General
Partners and their affiliates unless the transactions are approved in advance by
a   vote  of  the  Unitholders.  The  Bylaws  of  the  Company  contain  similar
restrictions, but the Company may enter  into a transaction with its  directors,
officers  and  significant  stockholders if  the  transaction is  approved  by a
majority of the directors not interested in the matter (including a majority  of
independent  directors) following a determination  that the transaction is fair,
competitive and commercially reasonable. The Bylaws do not require the  approval
of stockholders for entering into transactions with interested parties.
 
    COMPENSATION,  FEES AND DISTRIBUTIONS.  Under the Partnership Agreements and
the Management Services Agreements, each  of the Partnerships pays  compensation
to  its General Partner and fees to the Company. After the Mergers, no fees will
be paid to the Company and the Company will manage the Partnerships'  properties
through   its  employees.  Unlike   Unitholders,  stockholders  realize  certain
efficiencies arising from the Company's  self-managed structure and the  Company
can expand its property holdings without a proportionate increase in the cost of
managing the properties.
 
    MANAGEMENT  CONTROL AND RESPONSIBILITIES.  Stockholders have greater control
over management of the Company than  the Unitholders have over the  Partnerships
because  the  members  of  the  Company's Board  of  Directors  are  elected for
three-year terms,  with a  portion of  the Board  of Directors  elected at  each
annual  meeting of stockholders.  The General Partners  do not need  to seek re-
election, but instead serve unless removed by an affirmative vote of Unitholders
owning a  majority  of  the  Units  entitled to  vote,  which  is  generally  an
extraordinary  event. As  passive investors,  Unitholders and  stockholders must
rely upon  management of  the Partnerships  and Company,  respectively, for  the
prudent administration of their investments.
 
    MANAGEMENT  LIABILITY AND INDEMNIFICATION.   The General  Partner of each of
the Partnerships has, under most circumstances, no liability to its  Partnership
for  acts or omissions it  undertakes when performed in  good faith, in a manner
reasonably believed to  be within the  scope of  its authority and  in the  best
interests  of the  Partnership. Each General  Partner also  has, under specified
circumstances, a right to be reimbursed by its Partnership for liability,  loss,
damage,  costs and expenses it  incurs by virtue of  serving as General Partner.
Although the standards  are expressed  somewhat differently,  there are  similar
protections  from liability available  to directors and  officers of the Company
when acting on behalf  of the Company  and rights of  directors and officers  to
seek  indemnification  from the  Company. In  the Mergers,  the Company  will be
assuming all of  the existing  and contingent liabilities  of the  Partnerships,
including their obligations to indemnify the General Partners.
 
    VOTING  RIGHTS.   Stockholders have  different voting  rights, including the
right to elect directors on a periodic basis, than the voting rights afforded to
Unitholders.
 
    LIQUIDITY.  The  Units constitute illiquid  investments and Unitholders  may
find  it difficult to dispose of  their Units, if they wish  to do so, or may be
obligated to sell the Units at substantial discounts to facilitate the sales. In
contrast, the Common Stock is listed on the NYSE.
 
                                       12
<PAGE>
    TAXATION OF TAXABLE INVESTORS.  The Partnerships allow full pass-through  of
tax benefits resulting in taxable income or loss being taxed only at the partner
level.  Unitholders are  taxed on  their allocable  share of  Partnership income
regardless of the amount of cash distributions. The Company, as a REIT, is taxed
on income in  excess of dividends  paid to stockholders.  Company losses do  not
pass  through to stockholders. Stockholders are taxed on cash dividends received
out of Company  earnings and profits.  Distributions in excess  of earnings  and
profits  are taxable to stockholders to the extent they exceed the stockholders'
basis in his or her Common Stock.
 
    TAXATION OF TAX-EXEMPT  INVESTORS.   A tax-exempt Unitholder  is treated  as
carrying  on the  trade or  business activities of  the Partnership  in which it
invests. Income from real estate rental activities will not be characterized  as
unrelated  business taxable income  ("UBTI") as long  as only customary services
are  rendered  in  connection  with   the  activities.  Accordingly,  to   avoid
characterization  of the Unitholder's  allocable share of  Partnership income as
UBTI, the  income received  by the  Partnership  must be  income from  a  rental
activity  in which  only customary  services are  rendered. Dividends  paid with
respect to, or gain recognized on a disposition of, the Shares are not UBTI.
 
CONFLICTS OF INTEREST
 
    A number of conflicts  of interest are inherent  in the relationships  among
the Partnerships, the General Partners and the Company and their affiliates. See
"Conflicts  of Interest." Certain of these  conflicts of interest include, among
others:
 
    - Since the  general and  limited partners  are  the same  for each  of  the
      General  Partners, they are not in a position to view the proposed Mergers
      solely from the perspective of a single Partnership.
 
    - Because the general and limited partners of the General Partner of each of
      the Partnerships have  a financial interest  in consummating the  Mergers,
      there  is  an  inherent  conflict  of  interest  in  the  General  Partner
      structuring the terms and conditions of  the Mergers and the terms of  the
      Mergers  might  have been  different if  structured  by persons  having no
      financial interest in whether or not the Mergers were consummated.
 
    - Charles K. Barbo, the Chairman, President and Chief Executive Officer  and
      a  stockholder of the Company, is an individual general partner of each of
      the General Partners  and the  sole shareholder and  director of  Shurgard
      General  Partner, Inc. ("SGPI"), the corporate  general partner of each of
      the General Partners. Arthur W. Buerk, a stockholder of the Company, is an
      individual general partner of each  of the General Partners. In  addition,
      certain executive officers of the Company also serve as executive officers
      of SGPI.
 
    - Pursuant  to the  terms of  an agreement  executed in  connection with the
      Management Company  Merger,  Messrs. Barbo  and  Buerk and  the  executive
      officers of the Company, as former stockholders of the Management Company,
      will receive Shares upon consummation of the Mergers.
 
    - The  Partnerships'  properties  are  managed by  the  Company  pursuant to
      Management Services Agreements  under which the  Company receives  certain
      fees for its management services.
 
AMENDMENTS TO PARTNERSHIP AGREEMENTS
 
    Approval of the Acquisition Agreement by IDS2 and IDS3 Unitholders will also
constitute   approval  of  those  amendments  to  their  respective  Partnership
Agreements necessary to effect the transactions contemplated by the  Acquisition
Agreement,  including the Mergers. See "The Special Meetings -- The IDS2 Special
Meeting" and  "--  The IDS3  Special  Meeting," "The  Acquisition  Agreement  --
Amendments  to the Partnership  Agreements" and "Background  and Reasons for the
Mergers."
 
                                       13
<PAGE>
DISSENTERS' RIGHTS OF UNITHOLDERS
 
    A Unitholder will be entitled to  dissenters' rights in connection with  the
Merger   of  his  or  her  Partnership  if  the  Unitholder  properly  exercises
dissenters' rights under Section 25.10.900 et  seq. of the WULPA, the full  text
of  which  is attached  as Appendix  E to  this Proxy  Statement/Prospectus. See
"Dissenters' Rights of Unitholders."
 
MATERIAL FEDERAL INCOME TAX CONSIDERATIONS
 
    The Merger involves numerous federal income tax consequences to Unitholders.
See "Material Federal Income Tax Considerations." These material federal  income
tax consequences include:
 
    - Unitholders  who are  subject to income  tax will realize  taxable gain or
      loss in the  Mergers. See  "Estimated Taxable  Gain or  Loss." No  special
      distribution  of cash will be  made to Unitholders for  the payment of any
      tax. Any  gain or  loss  will be  recognized in  the  year the  Merger  is
      consummated.
 
    - For federal income tax purposes, gain resulting from the Merger is treated
      as  being recognized at the Partnership level.  The amount of gain will be
      allocated among  Unitholders based  on the  allocation provisions  of  the
      applicable Partnership Agreement.
 
    - The gain or loss recognized by a Unitholder from the Merger generally will
      be  treated as arising from the sale of assets used in a trade or business
      and will be characterized as capital gain  or loss except to the extent  a
      portion  of  the  amount realized  by  the Unitholder  is  attributable to
      depreciation recapture in Partnership property.
 
    - Unitholders who  are  not subject  to  income  tax will  not  recognize  a
      material amount of UBTI in the Merger.
 
ACCOUNTING TREATMENT
 
    Each  of the  Mergers will  be accounted for  as a  purchase under generally
accepted accounting principles ("GAAP").
 
                                       14
<PAGE>
OWNERSHIP STRUCTURE OF THE PARTNERSHIPS
 
    The following diagram shows the ownership structure of the Partnerships  and
the  General  Partners.  The structure  is  the  same for  each  Partnership. As
reflected in the diagram below, (i) Charles K. Barbo, the Chairman of the Board,
President and Chief Executive  Officer and a stockholder  of the Company, is  an
individual  general  partner  of  each  of the  General  Partners  and  the sole
shareholder and director of SGPI, the  corporate general partner of each of  the
General  Partners, (ii)  Arthur W.  Buerk, a stockholder  of the  Company, is an
individual general partner of each of the General Partners and (iii) the Company
is a limited partner of each of the General Partners.
 
    Under each  of the  Partnership Agreements,  the General  Partner  initially
receives 5% of all Partnership distributions until the Unitholders have received
distributions  equal  to their  capital contributions  plus a  preferred return.
Thereafter, the General Partner receives  20% of all further cash  distributions
and  the  sharing arrangement  between the  partners of  the General  Partner is
revised. The diagram below reflects the initial sharing percentages between  the
General Partner and Unitholders and among the partners of each General Partner.
 
    The  General Partners' percentage interest  in the Merger Consideration will
be based upon these distribution principles. Based upon the Net Asset Values  of
IDS1  and IDS2, the  Unitholders in those Partnerships  will not receive through
the Mergers the  amount of their  undistributed preferred returns.  Accordingly,
the  IDS1 General Partner and the IDS2  General Partner will only be entitled to
5% of the Merger  Consideration paid with respect  to those Partnerships.  Based
upon  the Net Asset Value for IDS3, the IDS3 Unitholders are expected to receive
Merger  Consideration  in  excess  of  their  undistributed  preferred   return,
entitling  the IDS3  General Partner to  20% of some  part, but not  all, of the
Merger  Consideration,  resulting   in  the  IDS3   General  Partner   receiving
approximately  7.5%  of  the  Merger Consideration  with  respect  to  IDS3. See
"Conflicts of Interest--General Partner's Interests."
 
                                     [LOGO]
- ------------------------
(1) As of the date of this Proxy Statement/Prospectus, the Company  beneficially
    owns       IDS1  Units (approximately    %),       IDS2 Units (approximately
       %) and      IDS3 Units (approximately    %).
 
                                       15
<PAGE>
                 SELECTED FINANCIAL INFORMATION OF THE COMPANY
 
    The  following selected financial information is derived from the historical
consolidated financial statements of  the Company. Selected unaudited  financial
data  for the three months ended March 31, 1995 and 1996 include all adjustments
(consisting only  of  normal  recurring accruals)  that  the  Company  considers
necessary  for a fair  presentation of consolidated  operating results for those
interim periods. Results for the interim periods are not necessarily  indicative
of  results for the  full year. This  information should be  read in conjunction
with  the  Company's  consolidated  financial  statements  and  other  financial
information incorporated by reference in this Proxy Statement/Prospectus.
 
                         SHURGARD STORAGE CENTERS, INC.
 
<TABLE>
<CAPTION>
                                             PREDECESSOR (1)                                    COMPANY (2)
                              ---------------------------------------------  --------------------------------------------------
                                                                                                       THREE MONTHS ENDED MARCH
                                     YEAR ENDED DEC. 31,          JAN. 1 TO    YEAR ENDED DEC. 31,               31,
                              ----------------------------------  MARCH 1,   ------------------------  ------------------------
                                1991       1992         1993        1994        1994         1995         1995         1996
                              ---------  ---------  ------------  ---------  -----------  -----------  -----------  -----------
<S>                           <C>        <C>        <C>           <C>        <C>          <C>          <C>          <C>
(IN THOUSANDS, EXCEPT PER SHARE DATA)
OPERATING DATA:
Total revenue...............  $  60,767  $  67,073   $   72,346   $  12,368  $  66,921    $  96,771    $  21,368    $  24,819
Net income..................     20,411     22,055       18,284      34,286     17,821       29,572        5,354        7,313
Net income per common share
 (3)........................      38.08      41.15        34.11       63.97       1.05         1.43          .31          .32
Dividends declared per
 common share (3)...........      60.45      56.71        59.57      732.05       1.02(4)      2.38(5)       .90(6)         0(7)
 
OTHER DATA:
Funds from operations (8)...  $  32,991  $  35,968   $   39,657   $   5,980  $  29,759    $  45,788    $   8,868    $  12,196
</TABLE>
 
<TABLE>
<CAPTION>
                                          DECEMBER 31,              AS OF          DECEMBER 31,               MARCH 31,
                                 -------------------------------  MARCH 1,   ------------------------  ------------------------
                                   1991       1992       1993       1994        1994         1995         1995         1996
                                 ---------  ---------  ---------  ---------  -----------  -----------  -----------  -----------
<S>                              <C>        <C>        <C>        <C>        <C>          <C>          <C>          <C>
BALANCE SHEET DATA:
Total assets...................  $ 416,085  $ 400,182  $ 393,982  $ 391,685  $ 494,590    $ 610,394    $ 536,467    $ 617,928
Total borrowings...............     24,430     24,365     26,016         --    167,137      142,840      181,392      157,260
</TABLE>
 
- ------------------------------
(1) The  Predecessor information reflects the combination of the 17 partnerships
    included in the Consolidation.
 
(2) The Company was inactive from January 1 through March 1, 1994.
 
(3) Predecessor "per share" information is  based on earnings and  distributions
    per original $1,000 investment. Distributions for the period from January 1,
    1994  to  March  1,  1994  include  the  liquidating  distributions  made in
    connection with the Consolidation.
 
(4) Does not include the  dividend of $0.44 per  share declared in January  1995
    based on financial results for the quarter ended December 31, 1994.
 
(5) Includes  the dividend of $0.44 per share  declared in January 1995 based on
    financial results  for the  quarter  ended December  31, 1994,  the  special
    dividend  of $0.10 per share  declared in November 1995  and the dividend of
    $0.46 per share declared in December 1995 based on financial results for the
    quarter ended December 31, 1995.
 
(6) Includes the dividend of $0.44 per  share declared in January 1995 based  on
    financial results for the quarter ended December 31, 1994.
 
(7) The  dividend for  the quarter ended  March 31,  1996 of $.47  per share was
    declared in May 1996.
 
(8) The Company  defines funds  from  operations ("FFO")  as net  income  before
    extraordinary  items (determined in accordance  with GAAP) plus depreciation
    and amortization related to  real estate activities,  plus or minus  certain
    nonrecurring revenue and expenses. FFO is used by many financial analysts in
    evaluating  REITs. FFO  should not  be considered  as an  alternative to net
    income (determined  in  accordance  with  GAAP), as  an  indication  of  the
    Company's   financial   performance  or   cash  from   operating  activities
    (determined in accordance with GAAP) or as a measure of liquidity, nor is it
    necessarily indicative of sufficient cash flow to fund all of the  Company's
    needs.
 
                                       16
<PAGE>
                     PRO FORMA CONSOLIDATED FINANCIAL DATA
 
    The following pro forma consolidated financial data as of March 31, 1996 and
for  the three-month period then ended and  for the year ended December 31, 1995
set forth  the effect  of the  Mergers  on the  Company's pro  forma  pre-Merger
financial  data as of and for the same dates as if the Offers were completed and
the Mergers had occurred on January 1, 1995.
 
    The Company's pre-Merger pro forma consolidated financial data are based  on
the   Company's  historical   financial  statements  adjusted   to  reflect  the
consummation of the following transactions as if such had occurred on January 1,
1995: (i) the Management Company Merger  in March 1995, (ii) the acquisition  of
Shurgard   Evergreen  Limited  Partnership  in  May  1995,  (iii)  the  sale  of
approximately 4.9 million shares of Common Stock of the Company in June and July
1995, (iv) the acquisition of four storage centers completed in 1995 and (v) the
purchase of 29,640, 23,022 and 23,843 of the outstanding Units of IDS1, IDS2 and
IDS3, respectively,  pursuant  to the  Offers.  The 1995  pre-Merger  pro  forma
consolidated  financial data assume that any  additional net income generated by
the preceding assumptions was distributed to stockholders in 1995.
 
    These pro forma consolidated financial data have been formatted to show  the
pro  forma  adjustments  to  the  Company's  pre-Merger  pro  forma consolidated
financial data related to each of the Partnerships in three separate columns  so
that  the Unitholder can evaluate  the results of the merger  of any one, two or
three of the Partnerships with the Company.
 
    The pro forma consolidated financial data are not necessarily indicative  of
what the Company's actual financial position or results of operations would have
been  as  of the  date or  for the  periods  indicated, nor  do they  purport to
represent the Company's financial position or results of operations as of or for
any future period. The pro forma  consolidated financial data should be read  in
conjunction  with all financial statements included elsewhere or incorporated by
reference in  this  Proxy  Statement/Prospectus.  See  "Pro  Forma  Consolidated
Financial Statements."
 
                     PRO FORMA CONSOLIDATED FINANCIAL DATA
 
<TABLE>
<CAPTION>
                                                            COMPANY       IDS1         IDS2         IDS3        COMPANY
                                                          PRE-MERGER    PRO FORMA    PRO FORMA    PRO FORMA   POST-MERGER
                                                           PRO FORMA   ADJUSTMENTS  ADJUSTMENTS  ADJUSTMENTS   PRO FORMA
                                                          -----------  -----------  -----------  -----------  -----------
<S>                                                       <C>          <C>          <C>          <C>          <C>
(IN THOUSANDS, EXCEPT PER SHARE AND SHARE DATA)
THREE MONTHS ENDED MARCH 31, 1996
  Revenue...............................................   $  25,106    $   1,327    $     952    $   1,587    $  28,972
  Net income............................................       7,118          440          308          401        8,267
  Net income per share (1)..............................        0.31           --           --           --         0.31
  Funds from operations (2).............................      12,180          724          479          686       14,070
  Weighted average shares outstanding (1)...............  23,196,858    1,276,961      856,799    1,275,199   26,605,817
 
YEAR ENDED DECEMBER 31, 1995
  Revenue...............................................   $ 100,669    $   5,283    $   3,718    $   6,377    $ 116,047
  Net income............................................      31,555        1,939        1,259        1,737       36,490
  Net income per share (1)..............................        1.36           --           --           --         1.37
  Funds from operations (2).............................      49,175        3,058        1,947        2,850       57,031
  Weighted average shares outstanding (1)...............  23,193,921    1,276,961      856,799    1,275,199   26,602,880
 
AS OF MARCH 31, 1996
  Total assets..........................................    $640,282      $33,754      $25,978      $44,306     $744,320
  Notes payable.........................................     154,601           --        2,850       10,384      167,835
  Equity................................................     441,827       32,454       21,757       31,143      527,181
</TABLE>
 
- ------------------------------
(1) Calculation is based on an assumption of a $25.00 Share Price.
 
(2) The Company defines FFO as net income before extraordinary items (determined
    in  accordance with GAAP) plus depreciation and amortization related to real
    estate activities, plus or minus certain nonrecurring revenue and  expenses.
    FFO  is used by many financial analysts  in evaluating REITs. FFO should not
    be considered as an alternative to net income (determined in accordance with
    GAAP), as an indication of the Company's financial performance or cash  from
    operating activities (determined in accordance with GAAP) or as a measure of
    liquidity,  nor is it necessarily indicative of sufficient cash flow to fund
    all of the Company's needs.
 
                                       17
<PAGE>
                           COMPARATIVE PER SHARE DATA
 
    The following table sets forth certain comparative per share data:
 
<TABLE>
<CAPTION>
                                           AS OF AND FOR THE YEAR ENDED           AS OF AND FOR THE PERIOD ENDED
                                                DECEMBER 31, 1995                         MARCH 31, 1996
                                      --------------------------------------  --------------------------------------
                                      NET INCOME    DIVIDENDS    BOOK VALUE   NET INCOME    DIVIDENDS    BOOK VALUE
                                      -----------  ------------  -----------  -----------  ------------  -----------
<S>                                   <C>          <C>           <C>          <C>          <C>           <C>
The Company:
  Pre-Merger pro forma (1)..........   $    1.36   $    2.38(2)   $   18.73    $     .32   $      --(3)   $   19.05
  Post-Merger pro forma combined
   (4)..............................        1.37        2.38(2)       19.48          .31          --(3)       19.81
IDS1:
  Historical (5)....................       16.04       19.22         183.44         4.06        4.84         182.66
  Pro forma equivalent (6)..........        1.86        2.23          21.29          .47         .56          21.20
IDS2:
  Historical (5)....................       12.06       16.25         192.34         2.85        4.06         191.13
  Pro forma equivalent (6)..........        1.62        2.18          25.84          .38         .55          25.68
IDS3:
  Historical (5)....................       15.02       18.75         205.67         4.24        4.69         205.22
  Pro forma equivalent (6)..........        1.40        1.75          19.23          .40         .44          19.19
</TABLE>
 
- ------------------------
(1) Pre-Merger pro forma  per share data are  based on the Company's  historical
    financial  statements adjusted to reflect  the consummation of the following
    transactions as if such had occurred on January 1, 1995: (i) the  Management
    Company  Merger in  March 1995, (ii)  the acquisition  of Shurgard Evergreen
    Limited Partnership in May 1995, (iii) the sale of approximately 4.9 million
    shares of  Common Stock  of the  Company in  June and  July 1995,  (iv)  the
    acquisition  of four storage centers completed  in 1995 and (v) the purchase
    of 29,640, 23,022  and 23,843  of the outstanding  Units of  IDS1, IDS2  and
    IDS3,  respectively, pursuant to  the Offers. The  1995 pre-Merger pro forma
    data assume  that  any additional  net  income generated  by  the  preceding
    assumptions  was distributed to stockholders in 1995. Per share amounts were
    calculated by  dividing the  pre-Merger  pro forma  data  by the  number  of
    outstanding  shares  of Class  A and  Class  B Common  Stock of  the Company
    ("Total  Common  Stock")  as  of  December  31,  1995  and  March  31,  1996
    (23,193,921 and 23,196,858, respectively).
 
(2)  Amount is  based on  historical dividends  declared by  the Company  in the
    periods indicated. Although it is the Company's intention to continue to pay
    quarterly dividends, the  payment of such  in the future  is subject to  the
    discretion  of the  Company's Board  of Directors,  which may  consider such
    factors as the Company's net  income, financial condition, requirements  for
    qualification as a REIT and other matters it deems relevant.
 
(3) The dividend for the quarter ended March 31, 1996 was declared in May 1996.
 
(4) The post-Merger pro forma combined per share data give effect to the Mergers
    by  combining the Company's  and the Partnerships' per  share data using the
    purchase method of  accounting. Post-Merger  outstanding shares  (26,605,817
    Shares) include the actual outstanding Total Common Stock at March 31, 1996,
    plus  the shares expected to be issued to Unitholders in connection with the
    Mergers.
 
(5) Historical  per share  data  is based  on historical  financial  information
    divided  by  148,202, 115,110  and  119,215 Units  of  IDS1, IDS2  and IDS3,
    respectively.
 
(6) Amounts represent historical financial information divided by the 1,276,961,
    856,799 and  1,275,199 Shares  to  be issued  in  connection with  the  IDS1
    Merger,  the IDS2 Merger and the IDS3 Merger, respectively, assuming a Share
    Price of $25.00.
 
                                       18
<PAGE>
                DISTRIBUTIONS AND MARKET PRICES OF COMMON STOCK
 
    On May 5, 1995, the Company's Common  Stock began trading on the NYSE  under
the  symbol "SHU." Before May 5, 1995, the Common Stock was quoted on the Nasdaq
National Market ("Nasdaq") under the symbol  "SHUR." The table below sets  forth
the high and low sale prices per share of Common Stock, as reported in published
financial sources, and distributions declared for the fiscal periods indicated.
 
<TABLE>
<CAPTION>
                                                                     PRICE PER SHARE OF
                                                                        COMMON STOCK
                                                                    --------------------  DISTRIBUTIONS
                                                                      HIGH        LOW      DECLARED (1)
                                                                    ---------  ---------  --------------
<S>                                                                 <C>        <C>        <C>
1994
  First Quarter (beginning March 28, 1994)........................  $  24.25   $  21.50    $     .14(2)
  Second Quarter..................................................     24.25      21.00          .44
  Third Quarter...................................................     23.25      20.50          .44
  Fourth Quarter..................................................     23.00      17.75          .44
1995
  First Quarter...................................................     24.00      19.50          .46
  Second Quarter (3)..............................................     24.50      22.63          .46
  Third Quarter...................................................     26.00      22.25          .46
  Fourth Quarter..................................................     27.00      24.75          .56(4)
1996
  First Quarter...................................................     27.50      25.88          .47
  Second Quarter..................................................     26.13      24.13
  Third Quarter (through July 8, 1996)............................     25.38      24.88
</TABLE>
 
- ------------------------
(1) Distributions  declared  by  the  Company's  Board  of  Directors  based  on
    financial results for the quarter specified.
 
(2) The first quarter distribution  reflects one month  of operations after  the
    Consolidation.
 
(3) The  high and  low sales prices  per share  of Common Stock  were $24.00 and
    $22.75, respectively, during the  period from April 1,  1995 through May  4,
    1995,  when the Common  Stock was quoted  on Nasdaq. The  high and low sales
    prices per  share of  Common  Stock were  $24.50 and  $22.63,  respectively,
    during  the period from May 5, 1995,  the date of commencement of trading of
    the Common Stock on the NYSE, through June 30, 1995.
 
(4) Includes the special dividend of $.10 declared in November, 1995.
 
    The last reported sale price per share of Common Stock on July 1, 1996,  the
last  trading day preceding  public announcement of the  Mergers, was $25.38. On
July 8, 1996, the last reported sale price per share of Common Stock was $25.00.
 
    No public market exists for the Units. See "Distributions and Market  Prices
of Units."
 
  UNITHOLDERS ARE URGED TO OBTAIN CURRENT MARKET QUOTATIONS FOR COMMON STOCK.
 
                                       19
<PAGE>
                                  RISK FACTORS
 
    In  evaluating  the Mergers  and the  Company, Unitholders  should carefully
consider the following factors, in addition to other matters set forth elsewhere
or incorporated in this Proxy Statement/ Prospectus by reference.
 
RISKS RELATING TO THE MERGERS
 
    CONFLICTS OF INTEREST. The Company,  the Partnerships, the General  Partners
and  their affiliates have significant conflicts  of interest in connection with
the Mergers,  including  (i)  Charles  K. Barbo,  the  Chairman  of  the  Board,
President  and Chief Executive Officer  and a stockholder of  the Company, is an
individual general  partner  of  each  of the  General  Partners  and  the  sole
shareholder  and director of SGPI, the corporate  general partner of each of the
General Partners, (ii)  Arthur W.  Buerk, a stockholder  of the  Company, is  an
individual  general  partner  of each  of  the General  Partners,  (iii) certain
executive officers  of  the Company  are  executive officers  of  the  corporate
general  partner of each of the General  Partners, (iv) pursuant to the terms of
the Partnership Agreements,  the General  Partners will receive  between 5%  and
7.5%  of the Merger  Consideration in exchange  for their GP  Interests, (v) the
Company and IPSC are limited partners of  each of the General Partners and  will
receive Shares in the Mergers, (vi) pursuant to the Contingent Shares Agreement,
Messrs. Barbo and Buerk and certain executive officers of the Company, as former
stockholders of the Management Company, will receive Shares upon consummation of
the  Mergers and (vii)  the Partnerships' properties are  managed by the Company
pursuant to the Management Services Agreements under which the Company  receives
certain fees for its management services. See "Conflicts of Interest."
 
    LACK  OF INDEPENDENT  REPRESENTATION.   The terms  of the  Mergers have been
established through negotiations between the  Company and the General  Partners,
which  have significant conflicts  of interest as described  in "-- Conflicts of
Interest." Unitholders  were  not  separately  represented  in  structuring  and
negotiating  the terms  of the  Mergers by  an unaffiliated  representative. Had
separate representation  been arranged  for the  Unitholders, the  terms of  the
Mergers might have been different.
 
    CHANGE  IN  NATURE OF  INVESTMENT.   Unitholders who  receive Shares  in the
Mergers will have  changed the  nature of their  investment. While  each of  the
Partnerships  was  formed  as  a finite-life  investment,  with  the Unitholders
receiving regular  cash distributions  out of  the Partnership's  net  operating
income  and special distributions upon  liquidation of the Partnership's assets,
the Company intends  to operate  for an  indefinite period  of time  and has  no
specific  plans for the  sale of its  assets. Stockholders receive distributions
out of the Company's cash flow from operations, but it is not expected that  any
special  distributions of liquidation  proceeds will be  made. Instead of having
their investments liquidated  through the liquidation  of the Company's  assets,
stockholders may liquidate their investment in the Company only through the sale
of  the Shares and the amount realized through the sale of the Shares may not be
equal to the amount  that would have been  realized by the stockholders  through
the  sale of the Company's assets. Stockholders  are subject to the market risks
of all  public  companies,  particularly  in that  the  value  of  their  equity
securities  will  fluctuate  from time  to  time depending  upon  general market
conditions and the Company's future performance.
 
    MERGERS AS TAXABLE EVENTS; NO SPECIAL  CASH DISTRIBUTION FOR THE PAYMENT  OF
ANY TAX.  For taxable Unitholders, the Mergers will result in the recognition of
either taxable income or loss, and no special cash distribution will be made for
the  payment of any tax. See "Material  Federal Income Tax Considerations -- Tax
Consequences of the Mergers." The following summarizes the tax consequences  for
Unitholders:
 
        MERGERS  AS TAXABLE EVENTS FOR  NON-TAX-EXEMPT UNITHOLDERS.  The Mergers
    will result in the recognition of gain or loss to each Partnership based  on
    the  difference between (i) the  sum of the fair  market value of Shares and
    any cash paid by the  Company as Additional Consideration  and in lieu of  a
    fractional share and the amount of liabilities of the Partnership assumed or
    pertaining  to properties acquired by the Company and (ii) the Partnership's
    adjusted tax basis in its assets
 
                                       20
<PAGE>
    acquired by  the  Company  in  the  Mergers.  Each  Unitholder  (except,  as
    discussed  below, certain tax-exempt Unitholders) in a Partnership generally
    will recognize his or her allocable share of gain or loss in accordance with
    the  terms  of  the  applicable  Partnership  Agreement.  Furthermore,  that
    Unitholder  will recognize gain on the receipt  of the Shares or cash to the
    extent of the excess of  the fair market value of  the Shares and amount  of
    cash received by the Unitholder in the Merger over the Unitholder's adjusted
    tax  basis in his  or her Units  (as adjusted after  taking into account the
    Unitholder's allocable share of  gain or loss  recognized by the  applicable
    Partnership  in the Mergers). Any gain recognized on the distribution of the
    Shares or cash will be treated  substantially as capital gain. Gain or  loss
    recognized by the Unitholders will be treated as passive income or loss. For
    a  discussion of  potential withholding requirements,  see "Material Federal
    Income Tax Considerations  -- Taxation of  the Company as  a REIT --  Backup
    Withholding" and "-- State and Local Taxes and Withholding."
 
        CONSEQUENCES OF MERGERS TO TAX-EXEMPT UNITHOLDERS.  Based on the General
    Partners' representations that the Partnerships do not hold their properties
    for  sale to customers  in the ordinary  course of a  trade or business, the
    Mergers will  not result  in recognition  of a  material amount  of UBTI  by
    certain  tax-exempt Unitholders  that do  not hold  their Units  as a dealer
    under Section 512(b)(5)(B) of the Internal Revenue Code of 1986, as  amended
    (the  "Code"), or  as "debt-financed  property" within  the meaning  of Code
    Section 514. Certain tax-exempt organizations,  however, do not qualify  for
    that  treatment.  See "Material  Federal  Income Tax  Considerations  -- Tax
    Consequences of the Merger."
 
        CHANGES IN  TAX CHARACTERIZATION  OF  DISTRIBUTIONS.   Stockholders  are
    taxed  on  cash  dividends received  out  of Company  earnings  and profits.
    Distributions in excess of earnings and profits are taxable to  stockholders
    to  the extent  they exceed  the stockholder's basis  in his  or her Shares.
    Company distributions to taxable Stockholders will be treated as  "portfolio
    income,"  eliminating the  potential tax  benefit of  the Partnerships where
    passive income  could be  passed through  to Unitholders  and used,  to  the
    extent  permitted under applicable  tax laws, to  offset passive losses from
    other sources.  Such  dividends will  not  be  treated as  UBTI  to  certain
    tax-exempt  stockholders. See "Material Federal Income Tax Considerations --
    Taxation of the Company as a  REIT -- Taxation of Taxable Stockholders"  and
    "-- Taxation of Tax-Exempt Stockholders."
 
    POTENTIAL   DIFFERENCES   BETWEEN   MERGER   CONSIDERATION   AND  REALIZABLE
VALUE.  Unitholders are  subject to the  risk that the Net  Asset Values of  the
Partnerships,  which are based primarily upon the independent appraised value of
the Partnerships'  properties,  do  not  reflect the  realizable  value  of  the
Partnerships'  assets in an actual transaction. Were this to be the case as to a
Partnership,  the  Merger  Consideration  received  by  a  Unitholder  of   that
Partnership   may  be  understated.   Stanger  was  engaged   to  evaluate  each
Partnership's portfolio of real  estate on a limited  scope basis utilizing  the
income  approach  and  the  sales comparison  approach  to  valuation.  The cost
approach,  another  approach  typically  used  by  appraisers  in  valuing  real
property,  was not  utilized by  Stanger. To the  extent that  the cost approach
would have produced different  values for the portfolios,  the Net Asset  Values
may  have varied. Stanger considered the cost  approach to be less reliable than
the income approach or the sales comparison approach given the primary  criteria
used  by  buyers  of the  type  of  property appraised  in  the  Appraisals. The
Appraisals are as of December  31, 1995 and have not  been updated to take  into
account  any developments  since that date,  such as changes  in the portfolios'
operating results or changes in the yield expectations of prospective purchasers
of such real estate assets, possibly affecting real estate value.
 
    UNCERTAINTY REGARDING MARKET PRICE  OF COMMON STOCK.   The number of  Shares
that will be received by the Unitholders of each Partnership is based in part on
the average market price of the Common Stock for the 20 consecutive trading days
ending  on the fifth trading day prior to the Vote Date; provided, however, that
the Share Price Range fixes the minimum Share Price at $22.25 regardless of  the
actual  market price of the Shares. See  "Fairness of the Mergers -- Conclusions
of the  General  Partners"  and  "--  Determination  of  Merger  Consideration."
Accordingly, if the market price of the Common Stock (i) is less than $22.25 per
share on the Share Price Date or (ii) decreases after
 
                                       21
<PAGE>
determination  of the number of Shares to be  issued in the Mergers and prior to
issuance of the Shares, the market  value of the Shares received by  Unitholders
in  the Mergers may  be less than the  Net Asset Values  of the Partnerships. In
addition, the market value of the Shares may decrease following consummation  of
the  Mergers if there  is increased selling  activity or as  a result of general
market and other factors.
 
    POTENTIAL CHANGE IN  LEVEL OF DISTRIBUTIONS.   The Mergers  are expected  to
affect the level of distributions made to Unitholders who become stockholders of
the  Company. Depending  upon the  Share Price used  to determine  the number of
Shares to be issued in the Mergers, the level of distributions after the Mergers
to Unitholders who have become Company stockholders may be lower than the  level
of  distributions received with respect to their Units prior to the Mergers. See
"Fairness of the Mergers -- Distribution Comparison."
 
    POTENTIAL LOSS OF FUTURE APPRECIATION.   The properties of the  Partnerships
may appreciate in value and might be able to be liquidated at a later date for a
price  which would yield Unitholders more  consideration than they would receive
in the Mergers.
 
    RISK OF SUBSTANTIAL INDEBTEDNESS.  Each of the Partnerships has adhered to a
policy of limiting its  borrowings, reducing the  risk of leveraged  investments
and  allowing a substantial portion of the Partnership's net operating income to
be distributed to Unitholders. In contrast, the Company is authorized to  borrow
up to 50% of its total assets as defined in the Company's Bylaws. If the Company
incurs  substantial debt, it will  be subject to the  risks that (i) the Company
could lose its interests in properties given as collateral for secured borrowing
if the required principal and interest payments  are not made when due and  (ii)
the  Company's obligation to  make principal payments, which  are not treated as
deductions for  federal  income tax  purposes,  does  not relieve  it  from  the
obligation  of distributing at least 95% of the Company's REIT taxable income to
stockholders.
 
    LOSS OF RELATIVE VOTING POWER.   Both Unitholders and stockholders have  one
vote  per  Unit and  share of  Common  Stock, respectively.  If the  Mergers are
completed, Unitholders will have an investment in an entity larger than each  of
the Partnerships and will thus lose relative voting power.
 
GENERAL REAL ESTATE INVESTMENT RISKS
 
    GENERAL  RISKS  RELATING  TO REAL  ESTATE  OWNERSHIP AND  OPERATION  OF SELF
STORAGE CENTERS.  An investment in the Company is subject to the risks  incident
to the ownership of real estate-related assets and the operation of self storage
centers. These risks include the fact that real estate investments are generally
illiquid,  which  may impact  the  Company's ability  to  vary its  portfolio in
response to  changes in  economic and  other conditions,  as well  as the  risks
normally  associated  with changes  in  market rental  rates  and the  impact of
environmental protection laws and changes in tax, real estate and zoning laws.
 
    RISKS OF REAL  ESTATE DEVELOPMENT.   The Company may  invest new capital  or
reinvest sale or refinancing proceeds to develop properties or to purchase newly
constructed  properties  that  are  still in  the  lease-up  stage.  Real estate
development involves risks in  addition to those involved  in the ownership  and
operation  of established properties, including  the risks that construction may
not be  completed on  schedule, resulting  in increased  construction and  other
costs,  and  that  properties  may  not be  leased  on  profitable  terms  or in
accordance with scheduled  lease-up plans. In  addition, to develop  properties,
the  Company must  engage appropriate contractors  or subcontractors  or both to
construct the  properties,  and  problems  may arise  in  connection  with  such
engagements,  thereby increasing the  cost of the  construction and resulting in
delays in completion. If any  of the above were to  occur to a material  extent,
the  Company's ability to  make expected distributions  to stockholders would be
adversely affected.
 
    INVESTMENTS IN OTHER COMMERCIAL REAL  ESTATE.  Although the Company  invests
primarily  in self  storage properties, it  may also invest  in other commercial
real estate if such investments are specifically approved by the Company's Board
of Directors. The Company has no present plans to make any such investments. The
authority of  the  Board of  Directors  to  make such  investments  permits  the
 
                                       22
<PAGE>
Company  flexibility in  selecting appropriate  investments and  in adjusting to
changes in  the  marketplace, without  requiring  amendments to  the  Bylaws  or
specific  stockholder approval.  Investments in other  forms of  real estate, if
they were to occur, will be subject to the risks unique to such investments and,
in particular, the  Company must  ensure that  such investments  are managed  by
persons  having  the  experience  and  expertise  necessary  for  the  effective
management and operation  of those investments.  Unfamiliarity with local  laws,
procedures  and practices, or in the  operation of such other investments, might
adversely  affect  the  Company's   FFO  and  its   ability  to  make   expected
distributions to stockholders.
 
    INDIRECT  INVESTMENTS.  The Company has  invested and may continue to invest
in real estate by  acquiring equity interests  in partnerships, joint  ventures,
trusts  or  other legal  entities  that in  turn  have invested  in  real estate
constituting appropriate investments for the  Company. For example, in 1995  and
1996, the Company invested an aggregate of $7.5 million (as of June 30, 1996) in
SSC  Benelux &  Co. SCS, a  Belgian entity  that owns and  operates self storage
properties in the Benelux region of Europe. In addition, as of the date of  this
Proxy  Statement/Prospectus  the  Company beneficially  owns         IDS1 Units,
        IDS2 Units and          IDS3 Units.  If one or more of the  Partnerships
does  not elect to participate in the Mergers, the Company may elect to hold the
Units for an indefinite period of time. Under the Bylaws, a number of conditions
must be  satisfied  before the  Company  is  permitted to  make  these  indirect
investments,  including, among others,  the requirement that  a joint investment
not jeopardize the Company's eligibility to be taxed as a REIT or result in  the
Company becoming an investment company under the Investment Company Act of 1940,
as  amended. These indirect investments expose  the Company to certain risks not
present had the Company invested directly  in the real estate, including,  among
others,  currency risks, the risk that the Company may not have control over the
legal entity that has title to the real estate, the possibility that the Company
may invest in an enterprise that has  liabilities that are not disclosed at  the
time  of the investment and the possibility that the Company's investments would
be illiquid and  not readily accepted  as collateral by  the Company's  lenders.
Each  of these risks might reduce the  Company's cash flow or impair its ability
to borrow funds, which ultimately  could adversely affect the Company's  ability
to   meet  debt   service  obligations   and  make   expected  distributions  to
stockholders.
 
    LIMITED ASSET DIVERSIFICATION.  The Company limits its investments primarily
to self storage  properties. The success  of an investment  in the Company  will
depend in large measure on the profitability of these businesses and real estate
investments.  The Company is not expected to have substantial interests in other
real estate investments  to hedge against  the risk that  national trends  might
adversely affect the profitability of self storage facilities.
 
    COMPETITION.   Competition  exists in  every market  in which  the Company's
stores are located. The Company competes with, among others, national,  regional
and  numerous local self storage operators  and developers. Such competition may
adversely affect the occupancy levels and  the rental revenues of the  Company's
self  storage properties, which  could adversely affect  the Company's cash flow
from operations  and its  ability  to meet  debt  service obligations  and  make
expected  distributions to stockholders.  The Company believes  that the primary
competition for potential customers of any of the Company's self storage  stores
comes  from other self storage properties  within a three-to-five-mile radius of
that store.  The Company  does not  seek  to be  the lowest-price  self  storage
provider.  Entry into the self storage  business through acquisition of existing
properties is  relatively easy  for persons  or institutions  with the  required
initial  capital. Some of the Company's competitors may have more resources than
the Company. Competition may be accelerated  by any increase in availability  of
funds  for  investment  in real  estate.  Decreases  in interest  rates  tend to
increase the availability of funds  and therefore can increase competition.  Due
to  recent  increases  in  development of  self  storage  properties  in certain
markets, the  Company anticipates  that increased  available storage  space  may
reduce occupancy levels per storage property within the industry in 1996 or 1997
and further intensify competition among storage providers for available tenants.
The  extent  to which  the Company  is  affected by  competition will  depend in
significant part on local market conditions.
 
                                       23
<PAGE>
    LIMITED POTENTIAL FOR OCCUPANCY GAINS.  Although relatively low increases in
storage  supply  and  continued  increases   in  industry  demand  have   driven
substantial  occupancy gains over  the last several  years, the Company believes
that significant  future  occupancy gains  will  be difficult  to  achieve  with
respect  to stabilized properties. The Company anticipates that future increases
in revenue from  stabilized properties in  its portfolio will  be primarily  the
result  of rental  rate increases.  To the  extent that  the existing properties
continue to operate profitably, this  will likely stimulate further  development
and  result  in greater  competition between  the  newly developed  and existing
properties.
 
    POSSIBLE  LIABILITY  RELATING  TO  ENVIRONMENTAL  MATTERS.    Under  various
federal,  state and local laws, ordinances and regulations, an owner or operator
of real property may become  liable for the costs  of removal or remediation  of
certain  hazardous  substances released  on or  in its  property. Such  laws may
impose liability without  regard to whether  the owner or  operator knew of,  or
caused,  the  release of  such hazardous  substances.  Although the  Company has
received a Phase I  environmental assessment report for  each of the  properties
that  it owns, it has  not received such a report  for certain of the properties
that it manages, where the Company might be considered the operator. The purpose
of each such report was  to identify, as of the  date of that report,  potential
sources   of  contamination  of  the  property  and  to  assess  the  status  of
environmental regulatory compliance.  In addition,  for some  of the  properties
that it owns, the Company has received Phase II environmental assessment reports
consisting  of soil testing, subsurface  water sampling, asbestos inspections or
other  investigations  deemed  appropriate   by  an  independent   environmental
consultant.  The presence  of hazardous substances  on a  property may adversely
affect the  owner's  ability to  sell  such property  or  to borrow  using  such
property as collateral, and it may cause the owner or manager of the property to
incur  substantial remediation costs.  In addition to  claims for cleanup costs,
the presence of hazardous substances on a property could result in the owner  or
manager  incurring substantial liabilities as  a result of a  claim by a private
party for personal injury or a claim by an adjacent property owner for  property
damage.  There can be no assurance that any environmental assessments undertaken
by the  Company  with  respect  to  the properties  that  it  owns  and  certain
properties   that  it   manages  have   revealed  all   potential  environmental
liabilities, that any prior owner or  operator of the properties did not  create
any  material  environmental condition  not  known to  the  Company, or  that an
environmental condition does not otherwise  exist as to any  one or more of  the
properties  that could have a material adverse effect on the Company's financial
condition or results of operations. In addition, there can be no assurance  that
(i)  future  laws,  ordinances  or  regulations  will  not  impose  any material
environmental liability,  (ii)  the  current  environmental  conditions  of  the
Company's  owned or managed properties will not  be affected by the condition of
properties in the vicinity of such  properties (such as the presence of  leaking
underground storage tanks) or by third parties unrelated to the Company or (iii)
tenants  will  not  violate  their  leases  by  introducing  hazardous  or toxic
substances into the Company's owned or managed properties that could expose  the
Company to liability under federal or state environmental laws.
 
    COST  OF COMPLIANCE WITH AMERICANS WITH DISABILITIES ACT AND FIRE AND SAFETY
REGULATIONS.  All of  the Company's properties are  required to comply with  the
Americans  With Disabilities Act, and the regulations, rules and orders that may
be issued thereunder (the "ADA").  The ADA has separate compliance  requirements
for  "public accommodations" and "commercial facilities," but generally requires
that buildings be made accessible to persons with disabilities. Compliance  with
ADA  requirements might require, among other  things, removal of access barriers
and  noncompliance  could  result  in  the  imposition  of  fines  by  the  U.S.
government,  or  an award  of  damages to  private  litigants. In  addition, the
Company is required to operate its properties in compliance with fire and safety
regulations, building  codes and  other land  use regulations,  as they  may  be
adopted  by  governmental  agencies  and bodies  and  become  applicable  to the
Company's properties. Compliance with such requirements may require the  Company
to  make substantial capital expenditures,  which expenditures would reduce cash
otherwise available for distribution to stockholders.
 
                                       24
<PAGE>
    PROPERTY TAXES.    Each of  the  Company's  properties is  subject  to  real
property  taxes.  The real  property  taxes on  these  properties and  any other
properties that the Company develops or  acquires in the future may increase  as
property  tax rates change and as such  properties are assessed or reassessed by
tax authorities.
 
RISKS RELATING TO QUALIFICATION AND OPERATION AS A REIT
 
    FAILURE TO REMAIN QUALIFIED AS A REIT.  The Company has elected to be  taxed
as  a REIT under the  Code, commencing with its  taxable year ended December 31,
1994. So  long  as  the  Company  meets the  requirements  under  the  Code  for
qualification  as a REIT each year, the  Company will be entitled to a deduction
when calculating its taxable income for dividends paid to its stockholders.  For
the   Company  to  qualify  as  a  REIT,  however,  certain  detailed  technical
requirements must be met  (including certain income,  asset and stock  ownership
tests)  under Code provisions for  which, in many cases,  there are only limited
judicial and administrative interpretations.  In addition, the determination  of
various  factual  matters and  circumstances not  entirely within  the Company's
control may affect its  ability to qualify  as a REIT, and  no assurance can  be
given that new legislation, regulations, administrative interpretations or court
decisions   will  not  significantly  change  the   tax  laws  with  respect  to
qualification as  a  REIT  or  the  federal  income  tax  consequences  of  such
qualification.  Although  the Company  believes that  it is  organized so  as to
qualify as a REIT under the Code and  that it has operated and will continue  to
operate  in such a manner to so qualify  as a REIT, the highly complex nature of
the rules governing REITs, the ongoing importance of factual determinations  and
the  possibility of future  changes in the  Company's circumstances preclude any
assurance that the Company  will so qualify  in any year.  For any taxable  year
that  the Company  fails to qualify  as a  REIT, it would  not be  entitled to a
deduction for  dividends paid  to its  stockholders in  calculating its  taxable
income.  Consequently,  the  net  assets of  the  Company  and  distributions to
stockholders would be substantially reduced  because of the Company's  increased
tax  liability. Furthermore, to  the extent that distributions  had been made in
anticipation of the  Company's qualification  as a  REIT, the  Company might  be
required  to borrow additional funds or  to liquidate certain of its investments
in order to pay the applicable tax. Should the Company's qualification as a REIT
terminate, the Company may not be able to elect to be treated as a REIT for  the
four  taxable years following the year  during which the qualification was lost.
See "Material Federal Income Tax Considerations -- Taxation of the Company as  a
REIT."
 
    EFFECT  OF DISTRIBUTION REQUIREMENTS.  To maintain  its status as a REIT for
federal income tax  purposes, the  Company generally  is required  each year  to
distribute  to its stockholders at least 95% of its taxable income. In addition,
the Company is subject to a 4%  nondeductible excise tax on the amount, if  any,
by  which certain distributions paid by it with respect to any calendar year are
less than the sum of 85% of its  ordinary income for such calendar year, 95%  of
its  capital gain net income for the calendar year and any amount of such income
that was not  distributed in  prior years. The  Company may  be required,  under
certain  circumstances, to accrue as income  for tax purposes interest, rent and
other items  treated  as  earned for  tax  purposes  but not  yet  received.  In
addition, the Company may be required not to accrue as expenses for tax purposes
certain items that actually have been paid. It is also possible that the Company
could  realize income, such as income from cancellation of indebtedness, that is
not accompanied by  cash proceeds.  In any such  event, the  Company could  have
taxable   income  in  excess  of  cash   available  for  distribution.  In  such
circumstances, the  Company  could be  required  to borrow  money  or  liquidate
investments  on unfavorable terms in order  to meet the distribution requirement
applicable to  a  REIT.  See  "Material Federal  Income  Tax  Considerations  --
Taxation of the Company as a REIT -- Annual Distribution Requirements."
 
    CHANGES IN TAX LAWS WHICH COULD AFFECT REITS.  Income tax treatment of REITs
may  be modified,  prospectively or  retroactively, by  legislative, judicial or
administrative action at any time. No  assurance can be given that  legislation,
new  regulations,  administrative interpretations  or  court decisions  will not
significantly change the tax laws with respect to the qualification as a REIT or
the
 
                                       25
<PAGE>
federal  income  tax  consequences  of   such  qualification.  While  any   such
legislation may contain transitional rules that would reduce their impact on the
Company,  it is impossible to  predict whether or in  what form such legislation
may be enacted in the future. See "Material Federal Income Tax Considerations."
 
OTHER GENERAL RISKS
 
    RISKS ASSOCIATED WITH MANAGEMENT OF PROPERTIES.  The Company manages 86 self
storage  properties,  of  which  47  are  owned  by  affiliates  (including  the
Partnerships)  and 39 are owned by nonaffiliates, under contracts that generally
may be terminated with or without cause  on 60 days' notice. If these  contracts
were  terminated, the Company would lose management fee income and other revenue
and, in addition, would experience decreased economies of scale in  advertising,
management and other overhead.
 
    EFFECT  OF  MARKET INTEREST  RATES ON  PRICE OF  COMMON STOCK.   One  of the
factors that influence the price of  the Common Stock in public trading  markets
is  the annual yield from distributions by the Company on the price paid for the
Common Stock as  compared to  yields on  other financial  instruments. Thus,  an
increase  in  market  interest  rates  will result  in  higher  yields  on other
financial instruments,  which could  adversely affect  the market  price of  the
Common Stock.
 
                                       26
<PAGE>
                              THE SPECIAL MEETINGS
 
GENERAL
 
    This  Proxy Statement/Prospectus is first being mailed on or about         ,
1996 to  the Unitholders  of each  of the  Partnerships in  connection with  the
solicitation  of  proxies  by  each  of the  General  Partners  for  use  at the
respective Special Meetings to be  held on        ,  1996, at 10:00 a.m.,  local
time,  at  1201  Third  Avenue,  Suite 2200,  Seattle,  Washington,  and  at any
adjournment or postponement thereof.
 
THE IDS1 SPECIAL MEETING
 
    At the  IDS1  Special Meeting,  including  any adjournment  or  postponement
thereof,  IDS1 Unitholders will be  asked to consider and  vote on a proposal to
approve the  Acquisition Agreement  and the  transactions contemplated  thereby,
including the IDS1 Merger. THE IDS1 GENERAL PARTNER HAS DETERMINED THAT THE IDS1
MERGER  IS FAIR TO  THE IDS1 UNITHOLDERS. ACCORDINGLY,  THE IDS1 GENERAL PARTNER
RECOMMENDS THAT IDS1 UNITHOLDERS VOTE FOR APPROVAL OF THE ACQUISITION  AGREEMENT
AND THE TRANSACTIONS CONTEMPLATED THEREBY.
 
    The  IDS1  Partnership  Agreement  prohibits  IDS1  from  entering  into any
transaction with the IDS1 General Partner  or its "affiliates," as such term  is
defined therein (including the Company), not specifically authorized in the IDS1
Partnership  Agreement, unless the  terms and conditions  of the transaction are
disclosed to IDS1 Unitholders in advance and approved by the affirmative vote of
IDS1 Unitholders holding of record more than 75% of the outstanding IDS1  Units.
Accordingly,   approval  of  the  Acquisition  Agreement  and  the  transactions
contemplated thereby requires the affirmative  vote of IDS1 Unitholders  holding
of record more than 75% of the outstanding IDS1 Units.
 
    Unitholders  as of  the date of  this Proxy  Statement/Prospectus whose IDS1
Units have not been purchased by the  Company in the IDS1 Offer are entitled  to
notice of the IDS1 Special Meeting. If IDS1 Units are transferred after the date
of  this Proxy Statement/Prospectus  but prior to  the date of  the IDS1 Special
Meeting or  any adjournment  or postponement  thereof, and  the holders  of  the
transferred  IDS1 Units are admitted as substituted IDS1 Unitholders, the Notice
of Special Meeting,  this Proxy Statement/Prospectus,  the accompanying form  of
proxy  and related information will be  sent to the substituted IDS1 Unitholders
along with notice  of their  substitution and admission.  This substitution  and
admission  will terminate  the right  of the prior  IDS1 Unitholders  to vote on
approval of the Acquisition Agreement and the transactions contemplated thereby,
and any votes as to the transferred  IDS1 Units must be made by the  substituted
IDS1  Unitholders. The IDS1 General Partner does not anticipate the substitution
of any new IDS1 Unitholders  other than the Company  with respect to those  IDS1
Units  it acquired in the IDS1 Offer and  any person who obtains IDS1 Units as a
result of intrafamily or testamentary  transfers. IDS1 Unitholders are  entitled
to  one vote at  the IDS1 Special Meeting  for each IDS1 Unit  held of record by
them as  of  the  date  of  the IDS1  Special  Meeting  or  any  adjournment  or
postponement  thereof.  As  of the  date  of this  Proxy  Statement/ Prospectus,
approximately 148,202  IDS1  Units  were  outstanding  and  held  of  record  by
              IDS1 Unitholders.
 
    If  a proxy  card is  returned, properly  signed and  dated, the  IDS1 Units
represented thereby will be voted in the manner specified on the proxy card.  If
an  IDS1 Unitholder returns a signed proxy card but does not indicate how his or
her IDS1 Units are to be voted, the IDS1 Units will be voted FOR approval of the
Acquisition Agreement and the transactions contemplated thereby. Any proxy given
pursuant to this solicitation may be revoked by the person giving it at any time
before it is voted. Proxies may be  revoked by (i) duly executing a later  dated
proxy  related to the same  IDS1 Units and delivering  it to Gemysis Corporation
prior to the taking of  the vote at the IDS1  Special Meeting, (ii) filing  with
Gemysis  Corporation, at or  before the taking  of the vote  at the IDS1 Special
Meeting, a written notice of revocation bearing a later date than the proxy,  or
(iii)  attending  the  IDS1  Special  Meeting  and  voting  in  person (although
attendance at the IDS1 Special  Meeting will not in  and of itself constitute  a
revocation  of a  proxy). Any subsequent  proxy or written  notice of revocation
should be mailed to
 
                                       27
<PAGE>
Gemysis Corporation at P.O.  Box 3897, Englewood,  Colorado 80155-9756, or  hand
delivered  to Gemysis Corporation at 7103 S. Revere Parkway, Englewood, Colorado
80112, at or before the taking of the vote at the IDS1 Special Meeting.
 
    The presence, either in person or by proxy, of a majority of the IDS1  Units
constitutes  a quorum. The IDS1 Special Meeting may be adjourned for the purpose
of obtaining additional proxies or votes or  for any other purpose, and, at  any
subsequent reconvening of the IDS1 Special Meeting, all proxies will be voted in
the  same manner as such proxies would have been voted at the original convening
of the  IDS1 Special  Meeting  (except for  any  proxies that  have  theretofore
properly  been revoked  or withdrawn), notwithstanding  that they  may have been
properly voted on the same or any other matter at a previous meeting.
 
    As of the date of this Proxy Statement/Prospectus, the Company  beneficially
owns        IDS1 Units or     % of the then  outstanding IDS1 Units. The Company
intends to vote these IDS1 Units  FOR approval of the Acquisition Agreement  and
the transactions contemplated thereby.
 
THE IDS2 SPECIAL MEETING
 
    At  the  IDS2 Special  Meeting,  including any  adjournment  or postponement
thereof, IDS2 Unitholders will be  asked to consider and  vote on a proposal  to
approve  the Acquisition  Agreement and  the transactions  contemplated thereby,
including the IDS2 Merger and the  amendment to the IDS2 Partnership  Agreement.
THE IDS2 GENERAL PARTNER HAS DETERMINED THAT THE IDS2 MERGER IS FAIR TO THE IDS2
UNITHOLDERS.   ACCORDINGLY,  THE  IDS2  GENERAL  PARTNER  RECOMMENDS  THAT  IDS2
UNITHOLDERS VOTE FOR APPROVAL OF THE ACQUISITION AGREEMENT AND THE  TRANSACTIONS
CONTEMPLATED THEREBY.
 
    The  IDS2 Partnership  Agreement prohibits the  sale of any  property by the
IDS2 Partnership to the IDS2 General  Partner or its "affiliates," as such  term
is  defined therein (including the Company). Accordingly, in order to consummate
the IDS2  Merger, the  IDS2 Partnership  Agreement must  be amended  to add  the
following subsection to Section 13.3(c):
 
        (iii)  Notwithstanding any provision of  this Agreement, the Partnership
    may merge  with and  into  Shurgard Storage  Centers, Inc.  (the  "Company")
    pursuant  to,  and consummate  all other  transactions contemplated  by, the
    terms of the Acquisition Agreement dated July 1, 1996, between the  Company,
    the  Partnership, IDS/Shurgard Income Growth Partners L.P. and IDS/ Shurgard
    Income Growth Partners L.P. III.
 
    Amendment of  the  IDS2  Partnership Agreement  requires  approval  of  IDS2
Unitholders holding of record more than 50% of the outstanding IDS2 Units. Thus,
approval  of the Acquisition Agreement and the transactions contemplated thereby
requires the affirmative vote  of IDS2 Unitholders holding  of record more  than
50%  of  the  outstanding  IDS2  Units. By  voting  to  approve  the Acquisition
Agreement and the  transactions contemplated thereby,  IDS2 Unitholders will  be
deemed to have voted in favor of the foregoing amendment to the IDS2 Partnership
Agreement.
 
    Unitholders  as of  the date of  this Proxy  Statement/Prospectus whose IDS2
Units have not been purchased by the  Company in the IDS2 Offer are entitled  to
notice of the IDS2 Special Meeting. If IDS2 Units are transferred after the date
of  this Proxy Statement/Prospectus  but prior to  the date of  the IDS2 Special
Meeting or  any adjournment  or postponement  thereof, and  the holders  of  the
transferred  IDS2 Units are admitted as  substitute IDS2 Unitholders, the Notice
of Special Meeting,  this Proxy Statement/Prospectus,  the accompanying form  of
proxy  and related information will be  sent to the substituted IDS2 Unitholders
along with notice  of their  substitution and admission.  This substitution  and
admission  will terminate  the right  of the prior  IDS2 Unitholders  to vote on
approval of the Acquisition Agreement and the transactions contemplated thereby,
and any votes as to the transferred  IDS2 Units must be made by the  substituted
IDS2  Unitholders. The IDS2 General Partner does not anticipate the substitution
of any new IDS2 Unitholders  other than the Company  with respect to those  IDS2
Units  it acquired in the IDS2 Offer and  any person who obtains IDS2 Units as a
result of intrafamily or testamentary  transfers. IDS2 Unitholders are  entitled
to  one vote at  the IDS2 Special Meeting  for each IDS2 Unit  held of record by
them as of the date of the IDS2 Special
 
                                       28
<PAGE>
Meeting or any adjournment or postponement thereof. As of the date of this Proxy
Statement/ Prospectus,  approximately 115,110  IDS2 Units  were outstanding  and
held of record by               IDS2 Unitholders.
 
    If  a proxy  card is  returned, properly  signed and  dated, the  IDS2 Units
represented thereby will be voted in the manner specified on the proxy card.  If
an  IDS2 Unitholder returns a signed proxy card but does not indicate how his or
her IDS2 Units are to be voted, the IDS2 Units will be voted FOR approval of the
Acquisition Agreement and the transactions contemplated thereby. Any proxy given
pursuant to this solicitation may be revoked by the person giving it at any time
before it is voted. Proxies may be  revoked by (i) duly executing a later  dated
proxy  related to the same  IDS2 Units and delivering  it to Gemysis Corporation
prior to the taking of  the vote at the IDS2  Special Meeting, (ii) filing  with
Gemysis  Corporation, at or  before the taking  of the vote  at the IDS2 Special
Meeting, a written notice of revocation bearing a later date than the proxy,  or
(iii)  attending  the  IDS2  Special  Meeting  and  voting  in  person (although
attendance at the IDS2 Special  Meeting will not in  and of itself constitute  a
revocation  of a  proxy). Any subsequent  proxy or written  notice of revocation
should be mailed to  Gemysis Corporation at P.O.  Box 3897, Englewood,  Colorado
80155-9756,  or hand delivered to Gemysis Corporation at 7103 S. Revere Parkway,
Englewood, Colorado 80112,  at or  before the  taking of  the vote  at the  IDS2
Special Meeting.
 
    The  presence, either in person or by proxy, of a majority of the IDS2 Units
constitutes a quorum. The IDS2 Special Meeting may be adjourned for the  purpose
of  obtaining additional proxies or votes or  for any other purpose, and, at any
subsequent reconvening of the IDS2 Special Meeting, all proxies will be voted in
the same manner as such proxies would have been voted at the original  convening
of  the  IDS2 Special  Meeting  (except for  any  proxies that  have theretofore
properly been revoked  or withdrawn),  notwithstanding that they  may have  been
properly voted on the same or any other matter at a previous meeting.
 
    As  of the date of this Proxy Statement/Prospectus, the Company beneficially
owns       IDS2 Units or     % of the  then outstanding IDS2 Units. The  Company
intends  to vote these IDS2 Units FOR  approval of the Acquisition Agreement and
the transactions contemplated thereby.
 
THE IDS3 SPECIAL MEETING
 
    At the  IDS3  Special Meeting,  including  any adjournment  or  postponement
thereof,  IDS3 Unitholders will be  asked to consider and  vote on a proposal to
approve the  Acquisition Agreement  and the  transactions contemplated  thereby,
including  the IDS3 Merger and the  amendment to the IDS3 Partnership Agreement.
THE IDS3 GENERAL PARTNER HAS DETERMINED THAT THE IDS3 MERGER IS FAIR TO THE IDS3
UNITHOLDERS.  ACCORDINGLY,  THE  IDS3  GENERAL  PARTNER  RECOMMENDS  THAT   IDS3
UNITHOLDERS  VOTE FOR APPROVAL OF THE ACQUISITION AGREEMENT AND THE TRANSACTIONS
CONTEMPLATED THEREBY.
 
    The IDS3 Partnership Agreement requires that a merger of IDS3 be approved by
IDS3 Unitholders owning of record more  than 50% of the outstanding IDS3  Units.
In  addition, the IDS3 Partnership Agreement  prohibits the sale of any property
by the IDS3 Partnership to the IDS3 General Partner or its "affiliates," as such
term is  defined  therein (including  the  Company). Accordingly,  in  order  to
consummate  the IDS3 Merger,  the IDS3 Partnership Agreement  must be amended to
add the following subsection to Section 13.3(c):
 
        (iii) Notwithstanding any provision  of this Agreement, the  Partnership
    may  merge  with and  into Shurgard  Storage  Centers, Inc.  (the "Company")
    pursuant to,  and consummate  all other  transactions contemplated  by,  the
    terms  of the Acquisition Agreement dated July 1, 1996, between the Company,
    the Partnership, IDS/Shurgard Income Growth Partners L.P. and IDS/  Shurgard
    Income Growth Partners L.P. II.
 
    Amendment  of  the  IDS3  Partnership Agreement  requires  approval  of IDS3
Unitholders holding of record more than 50% of the outstanding IDS3 Units. Thus,
approval of the Acquisition Agreement and the transactions contemplated  thereby
requires the affirmative vote of IDS3 Unitholders holding
 
                                       29
<PAGE>
of  record more than 50% of the outstanding IDS3 Units. By voting to approve the
Acquisition  Agreement   and  the   transactions  contemplated   thereby,   IDS3
Unitholders  will be deemed to have voted in favor of the foregoing amendment to
the IDS3 Partnership Agreement.
 
    Unitholders as of  the date  of this Proxy  Statement/Prospectus whose  IDS3
Units  have not been purchased by the Company  in the IDS3 Offer are entitled to
notice of the IDS3 Special Meeting. If IDS3 Units are transferred after the date
of this Proxy  Statement/Prospectus but prior  to the date  of the IDS3  Special
Meeting  or  any adjournment  or postponement  thereof, and  the holders  of the
transferred IDS3 Units are admitted as substituted IDS3 Unitholders, the  Notice
of  Special Meeting, this  Proxy Statement/Prospectus, the  accompanying form of
proxy and related information will be  sent to the substituted IDS3  Unitholders
along  with notice  of their substitution  and admission.  This substitution and
admission will terminate  the right  of the prior  IDS3 Unitholders  to vote  on
approval of the Acquisition Agreement and the transactions contemplated thereby,
and  any votes as to the transferred IDS3  Units must be made by the substituted
IDS3 Unitholders. The IDS3 General Partner does not anticipate the  substitution
of  any new IDS3 Unitholders  other than the Company  with respect to those IDS3
Units it acquired in the IDS3 Offer and  any person who obtains IDS3 Units as  a
result  of intrafamily or testamentary  transfers. IDS3 Unitholders are entitled
to one vote at  the IDS3 Special Meeting  for each IDS3 Unit  held of record  by
them  as  of  the  date  of  the IDS3  Special  Meeting  or  any  adjournment or
postponement thereof.  As  of the  date  of this  Proxy  Statement/  Prospectus,
approximately  119,215  IDS3  Units  were  outstanding  and  held  of  record by
              IDS3 Unitholders.
 
    If a  proxy card  is returned,  properly signed  and dated,  the IDS3  Units
represented  thereby will be voted in the manner specified on the proxy card. If
an IDS3 Unitholder returns a signed proxy card but does not indicate how his  or
her IDS3 Units are to be voted, the IDS3 Units will be voted FOR approval of the
Acquisition Agreement and the transactions contemplated thereby. Any proxy given
pursuant to this solicitation may be revoked by the person giving it at any time
before  it is voted. Proxies may be revoked  by (i) duly executing a later dated
proxy related to the  same IDS3 Units and  delivering it to Gemysis  Corporation
prior  to the taking of  the vote at the IDS3  Special Meeting, (ii) filing with
Gemysis Corporation, at or  before the taking  of the vote  at the IDS3  Special
Meeting,  a written notice of revocation bearing a later date than the proxy, or
(iii) attending  the  IDS3  Special  Meeting  and  voting  in  person  (although
attendance  at the IDS3 Special  Meeting will not in  and of itself constitute a
revocation of a  proxy). Any subsequent  proxy or written  notice of  revocation
should  be mailed to Gemysis Corporation,  at P.O. Box 3897, Englewood, Colorado
80155-9756, or hand delivered to Gemysis Corporation at 7103 S. Revere  Parkway,
Englewood,  Colorado 80112,  at or  before the  taking of  the vote  at the IDS3
Special Meeting.
 
    The presence, either in person or by proxy, of a majority of the IDS3  Units
constitutes  a quorum. The IDS3 Special Meeting may be adjourned for the purpose
of obtaining additional proxies or votes or  for any other purpose, and, at  any
subsequent reconvening of the IDS3 Special Meeting, all proxies will be voted in
the  same manner as such proxies would have been voted at the original convening
of the  IDS3 Special  Meeting  (except for  any  proxies that  have  theretofore
properly  been revoked  or withdrawn), notwithstanding  that they  may have been
properly voted on the same or any other matter at a previous meeting.
 
    As of the date of this Proxy Statement/Prospectus, the Company  beneficially
owns        IDS3 Units or     % of the then  outstanding IDS3 Units. The Company
intends to vote these IDS3 Units  FOR approval of the Acquisition Agreement  and
the transactions contemplated thereby.
 
SOLICITATION OF PROXIES BY SOLICITING AGENT
 
    Shurgard  Realty Advisors, Inc. ("SRA"), as the soliciting agent, will enter
into a Soliciting Agent Agreement with the  Company under which it will use  its
best  efforts  to solicit  Unitholders to  approve  the Mergers.  A copy  of the
Soliciting Agent  Agreement will  be filed  as an  exhibit to  the  Registration
Statement.  SRA will  not receive any  commissions with respect  to the Mergers;
however, all out-of-
 
                                       30
<PAGE>
pocket expenses (including  telephone, mailing and  legal expenses) incurred  by
SRA  will be treated as  solicitation expenses and will  be reimbursed to SRA as
set forth in  "The Acquisition Agreement  -- Fees and  Expenses." SRA is  wholly
owned by Charles K. Barbo. See "Conflicts of Interest."
 
    SRA may be deemed to be an underwriter under the Securities Act. The Company
has  agreed  to indemnify  SRA  against certain  liabilities,  including certain
liabilities under the Securities  Act and state securities  laws. To the  extent
that  such  indemnification provisions  purport  to include  indemnification for
liabilities under the  Securities Act, in  the opinion of  the Commission,  such
indemnification is contrary to public policy and, therefore, unenforceable.
 
INFORMATION AND TABULATION
 
    D.F.  King &  Co., Inc.  has been  engaged as  Information Agent  to perform
consulting, administrative and  clerical work  in connection  with the  Mergers.
Total  fees to the Information Agent are expected  to be in the range of $75,000
to $200,000. Gemisys Corporation has been engaged by each of the Partnerships to
act as Inspector of Elections and will be responsible for receipt and tabulation
of proxies. Total fees to the Inspector  of Elections are expected to be in  the
range  of  $75,000 to  $125,000.  The costs  of  the Information  Agent  and the
Inspector  of  Elections  are  Shared  Expenses  and  will  be  shared  by   the
Partnerships  and the Company in accordance  with the Acquisition Agreement. See
"The Acquisition Agreement -- Fees and Expenses."
 
    Under the Partnership  Agreements, Unitholders are  entitled to inspect  the
books  and  records of  their respective  Partnership  at reasonable  times upon
requisite notice to the General Partner of that Partnership (five business days'
notice in the case of IDS1 Unitholders and two business days' notice in the case
of IDS2  and  IDS3  Unitholders).  Any  Unitholder,  upon  paying  the  cost  of
duplicating  and  mailing,  is entitled  to  a copy  of  the list  of  names and
addresses of Unitholders  of his  or her respective  Partnership, including  the
number of Units held by each Unitholder.
 
                     BACKGROUND AND REASONS FOR THE MERGERS
 
BACKGROUND
 
    The  Partnerships  were  organized  to  serve  as  investment  vehicles  for
investors interested  in  a professionally  managed  portfolio of  self  storage
facilities and office and business parks with cash flow and capital appreciation
potential.  The  Partnerships  were  presented  to  Unitholders  as  finite-life
investments, with  the Unitholders  receiving quarterly  cash distributions  and
special  distributions  upon liquidation  of  the real  estate  investments. The
Partnerships expected to dispose of their  properties within a period of  either
seven  to nine years after acquisition or  development for IDS1 and IDS2 or five
to ten years after acquisition or development for IDS3.
 
    Since each Partnership  expected to  hold its  investments for  a number  of
years  after its formation, no efforts to dispose of the properties were made by
the General Partner  in the  early years  of the  Partnership's existence.  Each
General  Partner concentrated its initial efforts on making suitable investments
for the Partnership, consistent with  the Partnership's investment policies  and
restrictions,  and, with the  assistance of the Company  and its predecessor, on
managing  the  properties  efficiently  to  control  operating  expenses   while
maximizing operating revenues.
 
    In  the fall of 1994, the General Partners began considering the termination
of the Partnerships through an acquisition  of the Partnerships by the  Company.
The  General  Partners  and the  Company  recognized that  an  acquisition might
require the consent of IPSC under the terms of the GP Agreements.  Consequently,
on  September  22, 1994,  a representative  of  the Company  sent IPSC  a letter
discussing potential  advantages  and disadvantages  of  an acquisition  of  the
Partnerships  by  the  Company for  the  appraised values  of  the Partnerships,
whereby the Unitholders of the Partnerships would receive either cash or  Common
Stock  in exchange for their Units. The letter presented preliminary analyses of
values of the Partnerships  and invited IPSC to  contact the Company  concerning
how
 
                                       31
<PAGE>
or  if IPSC and the  Company might wish to  proceed. Although representatives of
the Company and the Partnerships had occasional discussions with representatives
of IPSC concerning  the business of  the Partnerships thereafter,  they did  not
pursue a potential transaction at that time.
 
    On  or  about June  22, 1995,  representatives of  the Company,  the General
Partner and IPSC held a meeting in  which they discussed the possibility of  the
Partnerships   merging  with  the  Company  and  other  alternatives,  including
liquidation of the Partnerships, designed  to enable the Unitholders to  realize
value  for their Units. The meeting was  inconclusive, but the parties agreed to
continue to analyze alternatives for Unitholders in the Partnerships.
 
    On July 18, 1995, Charles  K. Barbo, on behalf  of the Partnerships, sent  a
letter  to IPSC providing an analysis of alternative means to permit Unitholders
to realize value for  their Units, including a  merger of the Partnerships  with
the  Company,  a  liquidation of  the  Partnerships  and a  continuation  of the
business of the Partnerships.  Mr. Barbo recommended  that the General  Partners
consider,  as the  preferred alternative, mergers  of the  Partnerships with the
Company in which Unitholders would receive Common Stock or cash in the amount of
their respective Partnership's  net asset value  per Unit. The  net asset  value
would be based in substantial part on an independent appraisal of the properties
of  each of the  Partnerships. The letter  emphasized that no  decision had been
made to proceed with any transaction.
 
    IPSC subsequently asked the General Partners  for an analysis of the  impact
on  the partners of the General Partners  with respect to their interests in the
Partnerships of the alternatives  discussed in the July  18 letter. The  General
Partners  provided that analysis  to IPSC in  a letter dated  November 10, 1995.
Thereafter, the  parties agreed  that  they would  be  willing to  have  further
discussions after the beginning of the new year.
 
    In  January and  February 1996, the  General Partners and  IPSC continued to
explore the possibility of a merger involving the Partnerships and the  Company.
In  late February  1996, the General  Partners determined  that the Partnerships
should engage an appraiser  and an investment advisor  to assist in  considering
the possibility of pursuing a transaction with the Company.
 
    On February 28, 1996, Everest Storage Investors, LLC ("Everest") commenced a
tender  offer for  Units of the  Partnerships (the "Everest  Tender Offer"). The
cash consideration offered by Everest (i)  to the IDS1 Unitholders was $110  per
Unit,  which was 27% to 44%  below the prices at which  the IDS1 Units were then
traded during the first quarter  of 1996 on the  secondary market and 57%  below
the  price paid by the  Company in the IDS1 Offer,  (ii) to the IDS2 Unitholders
was $120 per Unit, which was 26% to 35% below the prices at which the IDS2 Units
were then traded during the  first quarter of 1996  on the secondary market  and
46% below the price paid by the Company in the IDS2 Offer, and (iii) to the IDS3
Unitholders  was $112 per Unit,  which was 32% to 44%  below the prices at which
the IDS3  Units  were then  traded  during the  first  quarter of  1996  on  the
secondary  market and 64% below the price paid by the Company in the IDS3 Offer.
The General Partners advised Unitholders not to accept the Everest Tender Offer.
Through the  Everest Tender  Offer, Everest  acquired a  total of  1,816.5  IDS1
Units,  1,931.3 IDS2  Units and 1,582.5  IDS3 Units  (collectively, the "Everest
Tendered Units").
 
    On March  8, 1996,  the General  Partners, on  behalf of  the  Partnerships,
engaged  Stanger to provide opinions as to the fairness to the Unitholders, from
a financial  point  of view,  of  the consideration  that  might be  offered  to
Unitholders in a potential transaction with the Company and to render appraisals
as  to  the fair  market  values of  the  Partnerships' real  estate portfolios.
Stanger previously  conducted  appraisals  and provided  fairness  opinions  and
special  reports  to affiliates  of  the General  Partners  with respect  to the
Consolidation. See "Appraisals and Opinions of Financial Advisors."
 
    On March 14, 1996,  representatives of the  General Partners, IPSC,  Stanger
and  the Partnerships  met to  discuss the terms  on which  the General Partners
would consider  an acquisition  of the  Partnerships by  the Company  through  a
one-step merger of the Partnerships into the Company. The discussion centered on
a  transaction in  which Unitholders  would receive,  at their  election, Common
Stock or
 
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<PAGE>
cash equal  to their  respective  Partnership's net  asset  value (based  on  an
independent  appraisal)  per Unit.  On  March 18,  1996,  legal counsel  for the
Partnerships provided the Company  with a draft of  an agreement reflecting  the
terms discussed by the parties.
 
    On  March 19, 1996,  at a regular meeting  of the Board  of Directors of the
Company, the  Board  discussed  the possible  acquisition  of  the  Partnerships
through  a merger. The directors  were informed by management  of the Company of
the  potential  conflicts  of  interest  involved  in  a  transaction  with  the
Partnerships.  See "Conflicts of Interest."  The Board confirmed the appointment
of a special committee (the  "Special Committee") consisting of two  independent
directors,  Donald  W. Lusk  and Wendell  J. Smith,  and authorized  the Special
Committee (i)  to review,  evaluate  and negotiate  the  terms of  any  proposed
transactions  involving the acquisition of the Partnerships by the Company, (ii)
to make a recommendation to the Board of Directors with respect to the  approval
or  disapproval  of  any  proposed  transaction  between  the  Company  and  the
Partnerships, and  (iii)  to  select  and retain  legal  counsel  and  financial
advisors. Thereafter, the Special Committee decided to retain Alex. Brown & Sons
Incorporated ("Alex. Brown") to assist in its evaluation of any transaction with
the  Partnerships and also retained legal counsel to assist in its consideration
and negotiation of any transaction with the Partnerships.
 
    On March 25, 1996, the Company and Public Storage, Inc. ("PS") entered  into
an  agreement whereby PS agreed  that it would not  acquire any interests in the
Company or any of  the Company's affiliates (including  the Partnerships) for  a
period  of two years without the Company's  consent (preventing PS from making a
tender offer for  the Units  or proposing  an alternative  transaction with  the
Partnerships  without  the  permission  of  the  Company).  Soon  thereafter, PS
disclosed to the Company that PS had  an agreement with Everest, whereby PS  had
agreed  to purchase  the interests  owned by  Everest in  various public limited
partnerships, including the Partnerships,  owning self storage assets.  Pursuant
to  a  letter agreement  dated  April 1,  1996,  the Company  consented  to PS's
acquisition of  the Everest  Tendered Units  as  well as  other Units  owned  by
Everest,  for a total of 1,824.5 IDS1 Units, 2,038.3 IDS2 Units and 1,602.5 IDS3
Units (collectively, the "Everest Units"), on the condition that PS grant to the
Company a right to purchase the Everest Units on terms substantially similar  to
those  on which  PS acquired  the Everest  Units from  Everest. PS  acquired the
Everest Units from Everest  on May 20, 1996  at a price of  $200 per IDS1  Unit,
$180  per IDS2 Unit and $190 per IDS3  Unit. The Company exercised its option to
acquire the Everest Units from PS at the same price, plus four days of interest,
and PS transferred  the Everest Units  to the  Company effective as  of May  20,
1996.
 
    From  late March 1996  through May 1996, representatives  of the Company and
the Partnerships discussed the possibility  of the Company's acquisition of  the
Partnerships.  During  this  time,  the  parties  discussed  the  possibility of
structuring the acquisition as a cash tender  offer followed by a merger of  the
Partnerships  into  the Company  in which  Unitholders  would receive  Shares in
exchange for their Units. The parties  viewed a two-step transaction (a  partial
cash  tender offer followed  by a stock  merger) as being  more desirable than a
one-step cash-election  merger  transaction. Completion  of  a merger  would  be
subject  to a  number of conditions  (including the approval  of Unitholders and
registration of the Shares) that would not be conditions to a cash tender offer.
Thus, the two-step transaction would provide Unitholders with an opportunity  to
obtain  liquidity for  a portion  of their Units  more quickly  than waiting for
completion  of  the  merger.  In  addition,  the  Company  favored  a   two-step
transaction  because it believed that such  structure might enable it to acquire
an ownership position in each of the Partnerships more quickly than would be the
case in  a one-step  merger.  During the  last week  of  May 1996,  the  Special
Committee  proposed to  the Partnerships  that the  Company acquire  each of the
Partnerships for a price equal to their respective net asset value, pursuant  to
a  cash tender offer for up to  a designated percentage of the outstanding Units
followed by a  merger in  which Unitholders would  receive Shares  with a  value
equal to the per Unit net asset value of their respective Partnership. The value
attributable to a Share was proposed to be the average of the closing prices for
a Share on the NYSE during a designated future period (the "Average Price"). The
parties  discussed setting the percentage  of Units that would  be sought in the
first   step   tender    offer   so    that   if   the    tender   offer    were
 
                                       33
<PAGE>
fully  subscribed, the Partnerships  would not terminate  for federal income tax
purposes due to  a sale  or exchange of  50% or  more of the  total interest  in
Partnership capital and profits in a twelve-month period.
 
    The  Special Committee indicated that its  proposal on behalf of the Company
would require  that (i)  if the  acquisition were  not completed  under  certain
circumstances,  the  Company  would  receive  a  fee  from  the  Partnerships (a
"Termination Fee") and reimbursement for all expenses incurred by the Company in
connection with  the transaction,  and (ii)  if  the Average  Price of  a  Share
exceeded  or was lower than the limits of  a price range, then the Average Price
would be fixed at the upper or lower limit of that price range, as appropriate.
 
    On June  4,  1996,  representatives  of the  Company  and  the  Partnerships
commenced   active  negotiation  of  the  terms  of  an  acquisition  agreement.
Thereafter, the terms of an acquisition agreement were also discussed with  IPSC
and  its legal counsel since the General Partner intended to seek the consent of
IPSC to complete a merger. See "The Acquisition Agreement." The most significant
negotiations concerned the operation  of the price  range and the  Partnerships'
payment of the Termination Fee and reimbursement of the Company's expenses under
certain circumstances. During the negotiations, the General Partners advised the
Special  Committee  that  IPSC  objected  to  the  Termination  Fee  and  to any
requirement that the Partnerships complete the Mergers if the Average Price  was
lower  than the lower  limit of the  price range. The  IDS1 General Partner also
advised the Special Committee that  it would be prohibited  by the terms of  the
IDS1  Partnership Agreement  from agreeing  to pay  the Termination  Fee and the
Company's expenses.  In  light  of  the  General  Partners'  positions  and  the
provisions  of the IDS1 Partnership  Agreement, the Special Committee ultimately
withdrew its request for the Termination Fee, determining that it was  advisable
and  in the best interests  of the Company and  its stockholders to proceed with
the transaction on this basis. The Partnerships and the General Partners  agreed
to  accept  the price  range  with certain  modifications  that would  allow the
General Partners to withdraw their recommendations of the Mergers and  terminate
the  Acquisition Agreement  if the  Average Price was  more than  $.75 below the
lower limit of the price  range and the Company does  not elect to increase  the
consideration  paid  in the  Mergers. IPSC  informed the  Company that  it would
reserve the right to withdraw its consent under these circumstances. The parties
also agreed that  the Company would  similarly have  the right to  elect not  to
proceed  with the Mergers if  the Average Price exceeded  the upper limit of the
price range by more than $.75.
 
    On June  13, 1996,  representatives  of the  General Partners,  IPSC,  their
respective  counsel and Stanger held a  teleconference to discuss the Offers and
the Mergers  and alternatives  thereto  and to  consider the  draft  acquisition
agreement,  draft appraisals and the draft fairness opinions and the assumptions
made in preparing the fairness opinions.
 
    On June  26,  1996,  Stanger  delivered the  Appraisals  and  revised  draft
fairness  opinions to the General Partners. On June 26, 1996, representatives of
the General Partners,  IPSC and  Stanger held  a teleconference  to discuss  the
draft  acquisition agreement, the Appraisals and revised draft fairness opinion.
During that  teleconference, Stanger  indicated its  willingness to  render  the
Stanger  Fairness Opinion  in the forms  presented to the  General Partners. The
General Partners concluded  that the terms  of the Offers  and the Mergers  were
fair to Unitholders, approved the execution of the Acquisition Agreement and the
Partnerships' participation in the transaction and formulated the recommendation
set  forth in this Proxy Statement/Prospectus,  subject to Stanger's delivery of
the Stanger Fairness Opinion on July 1, 1996.
 
    On June 26, 1996  and June 27,  1996, Alex. Brown  presented to the  Special
Committee a draft of its opinion that the consideration to be paid in the Offers
and  the Mergers is fair to the Company from a financial point of view, together
with related materials, and discussed the opinion and related materials and  the
analysis  performed and the assumptions made  in preparing the opinions with the
Special Committee and its legal counsel. Subsequent to that meeting the  Special
Committee and its
 
                                       34
<PAGE>
legal counsel and Alex. Brown met on June 27, 1996 with the other members of the
Company's  Board of Directors  in a meeting  to discuss the  transaction and the
draft of the Alex. Brown fairness opinions and related materials.
 
    On July 1, 1996,  the Special Committee, its  legal counsel and Alex.  Brown
met  with the  Board of  Directors to discuss  further the  transaction. At that
meeting, Alex. Brown delivered its opinion to the effect that the  consideration
to be paid in the Offers and the Mergers is fair to the Company from a financial
point of view, and the Special Committee recommended that the Board of Directors
of  the Company approve, and the Board of Directors did approve, the Acquisition
Agreement and the consummation by  the Company of the transactions  contemplated
by the Acquisition Agreement.
 
    On  July  1, 1996,  Stanger delivered  the Stanger  Fairness Opinion  to the
General Partners.
 
    On July 1, 1996,  the Company and  the General Partners  on behalf of  their
respective Partnerships executed and delivered the Acquisition Agreement.
 
    On July 2, 1996, the Company commenced the Offers.
 
PURPOSES AND STRUCTURE OF THE OFFERS AND THE MERGERS
 
    The  Offers were made and the Mergers have been proposed for approval (i) to
enable the  Company  to  acquire the  entire  equity  interest in  each  of  the
Partnerships  and (ii) to give Unitholders an opportunity to (a) liquidate their
Units for cash  in the Offers  or (b) continue  to own an  equity interest in  a
portfolio  of properties,  including their  respective Partnership's properties,
through an acquisition of Shares in the Mergers. For information concerning  the
factors  leading to the decision  by the Company to  commence the Offers and the
Mergers, see  "-- Background."  If the  conditions to  the consummation  of  the
Mergers are satisfied, the Company intends to consummate the Mergers and acquire
the entire equity interest in the Partnerships that it does not already own.
 
    The  Company's  proposal to  acquire  the Partnerships  commenced  with cash
tender offers for up to a specified number of Units of each Partnership and,  if
applicable  conditions have been satisfied, will be followed by Mergers in which
the outstanding equity interests in the  Partnerships will be exchanged for  the
Merger  Consideration. Pursuant to  the Partnership Agreements,  approval of the
IDS1 Merger requires the affirmative vote by holders of greater than 75% of  the
outstanding  IDS1 Units  and approval  of the  IDS2 Merger  and the  IDS3 Merger
requires the affirmative vote by holders of a majority of the IDS2 Units and the
IDS3 Units, respectively. The percentage of  Units sought in each Offer was  set
so  that if the Offer was fully  subscribed, the Partnership would not terminate
for federal income  tax purposes due  to a  sale or exchange  within a  12-month
period  of 50%  or more of  the total interest  in its capital  and profits. The
parties viewed a two-step  transaction (partial cash  tender offers followed  by
stock  mergers)  as being  more  desirable than  one-step  cash-election mergers
because completion of  the mergers would  be subject to  a number of  conditions
(including  the approval  of Unitholders  and registration  of the  Shares) that
would not be  conditions to  tender offers.  See "The  Acquisition Agreement  --
Conditions  Precedent  to  the  Mergers."  Thus,  the  two-step  transaction was
designed to provide Unitholders  with an opportunity to  obtain liquidity for  a
portion  of their Units more quickly than waiting for completion of the Mergers.
The Company favored a two-step  transaction because that structure might  enable
it  to acquire an  ownership position in  each of the  Partnerships more quickly
than through one-step mergers.
 
    Pursuant to the  General Partner  Undertaking and  the Standstill  Agreement
contained  in the Acquisition  Agreement, the Company has  agreed that, upon its
admission as a substituted limited partner  with respect to any Units  purchased
in  the Offers, it will not, except through the Offers and the Mergers, directly
or indirectly acquire any additional Units, propose any merger or other business
combination involving any Partnership, or propose any other transaction pursuant
to which it would control any of the assets of any Partnership without the prior
written consent of a majority of the general partners of the General Partner  of
the  Partnership. In addition, in the event that any of the Mergers do not occur
for any reason,  the Company  will evaluate its  other alternatives,  including,
subject  to the  General Partner  Undertaking and  the Standstill  Agreement and
restrictions imposed by law, purchasing additional Units in the open market,  in
privately negotiated transactions, in another
 
                                       35
<PAGE>
tender  or exchange offer or  otherwise, or taking no  further action to acquire
additional Units. Any additional purchase of Units could be for cash, stock or a
combination thereof. Alternatively, the Company may sell or otherwise dispose of
any  or  all  Units  acquired  pursuant  to  the  Offers  or  otherwise.   These
transactions  may be  effected on  terms and  at prices  then determined  by the
Company, which may vary from the Merger Consideration.
 
    The Company regards  the acquisition  of the Partnerships  as an  attractive
investment  opportunity at this time because  it believes that the Partnerships'
future business  prospects are  favorable. In  addition, the  Mergers are  being
undertaken  within the  time period  within which  the Partnerships  expected to
liquidate their properties. See "-- Background."
 
GENERAL PARTNERS' RECOMMENDATIONS AND REASONS
 
    THE GENERAL PARTNER OF EACH  PARTNERSHIP RECOMMENDS THAT UNITHOLDERS OF  THE
PARTNERSHIP  VOTE FOR APPROVAL OF THE ACQUISITION AGREEMENT AND THE TRANSACTIONS
CONTEMPLATED THEREBY. This recommendation is  based upon each General  Partner's
belief  that (i) the terms of the respective Merger, when considered as a whole,
are fair  to the  Unitholders of  the respective  Partnership, (ii)  the  Merger
Consideration   being  offered  in  exchange  for  the  Units  constitutes  fair
consideration for the  interests of  the Unitholders and  (iii) after  comparing
certain potential benefits and detriments of the respective Merger with those of
several   alternatives,  the  respective  Merger   is  more  attractive  to  the
Unitholders than the  alternatives. These  beliefs are based  upon each  General
Partner's  analysis of  the terms  of the  respective Merger,  assessment of the
respective Merger's potential economic  impact upon the Unitholders,  comparison
of  certain  potential  benefits and  detriments  of the  respective  Merger and
several alternatives  to  the respective  Merger  and review  of  the  financial
condition  and performance of the respective Partnership and the Company and the
terms of material agreements by which they are bound.
 
EXPECTED BENEFITS FROM THE MERGERS
 
    In deciding whether to recommend the Mergers as well as in negotiating their
terms, the General Partners considered the  benefits that would be derived as  a
result  of  the Mergers.  The following  is  a brief  discussion of  the primary
benefits for the Unitholders and the General Partners that are expected from the
Mergers:
 
    GROWTH POTENTIAL.  The Partnerships are not in a position to take  advantage
of external growth opportunities since they have already committed their capital
and  are  not authorized  to  raise additional  funds  or reinvest  net  sale or
refinancing proceeds for new investments. In contrast, the Company not only  may
reinvest  net sale or refinancing proceeds but also may raise additional capital
through the sale  of debt  or equity securities,  allowing the  Company to  take
advantage  of investment  opportunities that  may be  available in  current real
estate  markets.  In  addition,  the  Company  may  pursue  development  of  new
facilities,   which  the   Company  believes  will   provide  opportunities  for
significant  capital  appreciation.  The  Company  has  recently  expanded   its
operations  into Europe, which  the Company believes  provides attractive market
opportunities. Unitholders who become stockholders  will be able to  participate
in  real estate acquisition  and development opportunities  and in the Company's
expansion into  new  markets  and the  Company's  investments  in  participating
mortgages and joint ventures.
 
    Even  if the Partnerships  were permitted to  raise additional funds through
debt or equity offerings,  the Company should be  able to issue additional  debt
and  equity securities with greater ease and on more attractive terms than would
be available to  any of the  Partnerships due  to the Company's  larger base  of
assets  and stockholders' equity. The Company  has a total market capitalization
of over $700 million, making the Company one of the larger equity REITs and  one
of  the largest  owners of  self storage  facilities in  the United  States. The
Company's capital base  makes it  an attractive  candidate for  the services  of
investment  banking  firms,  financial institutions,  institutional  lenders and
others interested in placing large amounts of capital.
 
                                       36
<PAGE>
    ASSET  DIVERSIFICATION.     The  Mergers  permit   Unitholders  who   become
stockholders  to participate in an investment portfolio substantially larger and
more geographically diversified than the  portfolio of any of the  Partnerships.
The size and geographic diversity of the Company's portfolio spreads the risk of
an  investment in  the Company over  a broader  group of assets  and reduces the
dependence of the  investment upon the  performance of any  particular asset  or
group of assets, such as assets in the same geographical area.
 
    LIQUIDITY.   No active trading market  exists for the Units, and Unitholders
may have difficulty in disposing  of their Units, if they  so desire, or may  be
obligated to sell the Units at substantial discounts to facilitate the sales. In
contrast,  approval of the Mergers will provide Unitholders with the opportunity
to own Common Stock in an entity  publicly traded on the NYSE. For a  discussion
of the risks associated with owning Shares, see "Risk Factors."
 
    SINGLE  BUSINESS ENTITY TO PURSUE INVESTMENT  OBJECTIVES.  As separate legal
entities with different investors, each  of the Partnerships must segregate  its
assets  and  liabilities  (to  avoid  commingling  assets),  conduct  operations
independently and maintain  separate books  and records for  the preparation  of
financial  statements, tax returns, investor information and reports and filings
to be made to the Commission. The  assets of one Partnership cannot be  employed
for the benefit of one or more of the other Partnerships. Potential conflicts of
interest  arise  in  the  allocation  of  management  resources  and  efforts to
refinance or dispose of  properties. In contrast, the  Mergers place all of  the
assets  of  the  Partnerships under  common  ownership  with the  assets  of the
Company, and allow such assets to be used to achieve a common set of  investment
objectives.  Through the Mergers,  Unitholders will be entitled  to share in the
advantages of  the  Company  that  cannot  be  fully  pursued  by  each  of  the
Partnerships acting on its own. Such advantages include, but are not limited to,
the  opportunity of  making new investments,  the availability  of financing and
taking advantage of certain business opportunities (which may not be  profitably
pursued by any of the Partnerships).
 
    COMPANY  AS SELF-ADMINISTERED REIT.  The Partnerships are externally managed
by the Company  pursuant to the  terms of their  respective Management  Services
Agreements.  Through the Mergers,  Unitholders would benefit  from the Company's
structure as a self-administered REIT,  which enhances the Company's  operations
in a number of significant ways, including:
 
        (a)  The  persons managing  the Company  are  employees of  the Company,
    directly accountable to its Board of Directors. They are not employees of  a
    separate  management company or  investment advisor whose  activities may be
    guided by objectives inconsistent with the Company's objectives.
 
        (b) The Company can align  management compensation more directly to  the
    Company's   financial  performance.   The  Company   has  adopted  long-term
    incentive,  profit-sharing   and  other   bonus  programs   to   incentivize
    performance and to maximize corporate profits and to align compensation more
    closely  with  the  interests  of  the  stockholders.  Since  the  Company's
    management has a substantial equity  interest in the Company, the  financial
    interest  of management  is directly tied  to the financial  interest of the
    Company's stockholders,  in  contrast  to the  typical  property  management
    arrangement  where the manager receives a  percentage of the managed assets'
    gross income, benefiting from providing  management services whether or  not
    the assets are profitably managed.
 
        (c)  The stockholders are  the beneficiaries of  all future developments
    created by the Company's management. As operational systems are improved, or
    applications  of   these  systems   are  developed   by  management,   these
    opportunities  may be economically exploited by the Company, consistent with
    its overall investment objective  of qualifying as a  REIT. Any increase  in
    the  value of  the Company's  goodwill, and  the corresponding  value in the
    "Shurgard" name,  will  accrue  to  the  benefit  of  the  Company  and  its
    stockholders.  This is  not true  with respect  to the  Partnerships because
    management services  are  performed  by an  outside  property  manager  (the
    Company) that retains control over all management systems and owns rights to
    the "Shurgard" name under which the Partnerships' properties are managed.
 
                                       37
<PAGE>
        (d) Self-administered REITs are generally more favorably received in the
    capital  markets than  externally managed  REITs, with  the result  that the
    equity securities of  self-administered REITs trade  at higher multiples  to
    earnings than those of externally managed REITs.
 
    RETIREMENT  PLAN  AND IRA  VALUATIONS.   The  Internal Revenue  Service (the
"IRS") has  taken  the  position  that custodians  and  trustees  of  Keogh  and
corporate  retirement plans must determine, on  an annual basis, the fair market
value of the units in the limited partnerships owned by such plans and, in  some
cases,  must use independent  appraisal or valuation  services to determine such
values. The  cost of  these independent  valuations impacts  the return  on  the
plan's  investment  in  the  limited partnership.  In  addition,  custodians and
trustees of IRAs are required to report to the IRS on an annual basis, the  fair
market  value of the units owned by such IRAs. Approval of the Mergers generally
will allow custodians and trustees of such plans and IRAs to value the Shares by
reference to  published  price information  from  the NYSE  without  independent
valuation or appraisal.
 
    SIMPLIFIED  TAX ADMINISTRATION.   The Mergers will  result in simplified tax
administration for many Unitholders. Stockholders will receive Form 1099-DIV  to
report  their dividends from the Company.  Form 1099-DIV is substantially easier
to understand than the more complicated Schedule K-1 prepared for the  reporting
of the financial results of the Partnerships.
 
    REDUCED  STATE INCOME  TAX REPORTING.   Unitholders  who become stockholders
will no longer be subject to the  requirements to file state income tax  returns
and/or  pay state income taxes in the following states in which the Partnerships
earn taxable income (assuming the Unitholders are not otherwise required to file
in the states): Arizona, California, Georgia, Michigan, Oregon and Virginia.
 
ALTERNATIVES TO THE MERGERS
 
    The following is a brief discussion of certain benefits and disadvantages of
alternatives to the Mergers that were considered by the General Partners.
 
    LIQUIDATION.  An alternative to the Mergers would be liquidating the  assets
of  the Partnerships, distributing  the net liquidation  proceeds to the General
Partners and  Unitholders in  accordance with  the Partnership  Agreements,  and
thereafter dissolving the Partnerships. Through these liquidations, Unitholders'
investment  in the Partnerships would be  concluded. All Unitholders would be at
liberty to use the net  liquidation proceeds for investment, business,  personal
or other purposes.
 
    In  recent  years,  operating  results  with  respect  to  the Partnerships'
properties have improved, there has  been increased sales activity with  respect
to self storage facilities and the capitalization rates at which facilities have
been  selling have become more favorable  to sellers resulting in higher prices.
The General Partners anticipate that net operating income from the Partnerships'
facilities will continue to improve although at a slower rate than in the  past.
If  performance  improvements  continue,  the value  of  the  properties  of the
Partnerships would be expected to increase,  so long as capitalization rates  at
which  self storage facilities  are sold do not  increase and sufficient capital
remains available  to  finance  acquisitions.  A  complete  liquidation  of  the
Partnerships  would deprive  those Unitholders  who do  not desire  to liquidate
their investment in self storage  properties from participating in the  benefits
of  future performance  and possible  property value  improvements. In addition,
liquidation of the Partnerships' properties does  not have certain of the  other
benefits  of the  Mergers, including  (i) permitting  Unitholders to  hold their
investment in real estate until a time when liquidation is appropriate for their
individual investment  strategy  and  (ii) the  opportunity  to  participate  in
acquisition  and development  opportunities existing  in the  real estate market
through equity ownership in the Company.
 
    The transaction  costs  associated  with  the Mergers  are  expected  to  be
significantly  less than those which  would be incurred in  a liquidation of the
Partnerships' assets.  If the  Mergers are  consummated, the  Partnerships  will
effectively  dispose  of  all  of  their  assets  and  liabilities  in  a single
transaction, which will  minimize the liquidation  costs. If the  assets of  the
Partnerships  were liquidated over time, not only would higher transaction costs
likely be incurred, but distributions to Unitholders from the Partnerships' cash
flow from operations may be reduced since the Partnerships' fixed costs, such as
 
                                       38
<PAGE>
general and administrative expenses, would  not be proportionately reduced  with
the  liquidation  of assets.  In addition,  the  proceeds from  the sale  of the
Partnerships' properties  are likely  to be  reduced by  broker fees  and  other
transaction costs.
 
    The  General Partners favor the Mergers over liquidation of the Partnerships
because the  Mergers will  enable Unitholders  to participate  in the  Company's
substantially larger, more diversified investment portfolio, to benefit from the
Company's ability to access capital markets and to take advantage of acquisition
and  development  opportunities. In  addition,  the estimated  transaction costs
associated with the Mergers are significantly  less than would be incurred in  a
liquidation  of the  Partnerships' assets  on a  single transaction  or multiple
transaction basis.
 
    CONTINUATION OF THE PARTNERSHIPS.  A second alternative to the Mergers would
be to continue each of the Partnerships as a separate legal entity, with its own
assets and liabilities. While the disclosure  documents used to offer the  Units
for sale to the public disclosed the intentions of the Partnerships to liquidate
their  assets within  seven to nine  years after acquisition  or development for
IDS1 and IDS2 and within five to ten years after acquisition or development  for
IDS3,  each of the Partnerships has a  stated life of approximately forty years,
the Unitholders  were advised  that the  liquidation of  the Partnerships  would
depend  upon market conditions  as they might  change from time  to time and the
Partnerships are  all operating  profitably  and do  not  need to  liquidate  to
satisfy  debt obligations  or other  current liabilities  or to  avert defaults,
foreclosures or other adverse business developments.
 
    A number  of  advantages would  be  expected  to arise  from  the  continued
operation  of the Partnerships.  Unitholders would probably  continue to receive
regular quarterly distributions of net cash flow arising from operations and the
sale or refinancing of their  Partnership's assets. The General Partners  expect
that  net  operating  income  from the  properties  would  continue  to improve,
although at  a slower  rate than  in  the past,  which would  support  continued
improvements  in quarterly distributions. In  addition, the decision to continue
the Partnerships,  if  selected, would  avoid  whatever disadvantages  might  be
inherent in the Mergers. See "Risk Factors."
 
    The  primary disadvantage with continuing the Partnerships is the failure to
secure the benefits that the General  Partners expect from the Mergers. See  "--
Expected  Benefits From the Mergers." In addition, if the Partnerships continue,
Unitholders may not have  an opportunity for liquidity  in the near future.  The
Partnerships might, however, be sold at another time in another transaction that
could  be  on terms  more  or less  favorable  to Unitholders.  Accordingly, the
General Partners have concluded that continuation of the Partnerships is not  as
attractive as the Mergers.
 
    SUPPORT  OF  SECONDARY  MARKET.    Another  alternative  which  would create
liquidity for  Unitholders  desiring to  dispose  of their  investments  in  the
Partnerships  is the creation or  support of the secondary  market for the Units
through limited  cash tender  offers  or repurchase  programs sponsored  by  the
Partnerships.  While the  General Partners  believe that  this alternative might
provide liquidity for some Unitholders, the terms of the Partnership  Agreements
and  federal tax law prohibit this alternative from being available with respect
to a majority of the Units. No  detailed financial analysis was done that  would
allow  the General Partners to predict with any degree of certainty the possible
impact of this alternative on the value of the Units.
 
    REORGANIZATIONS OF PARTNERSHIPS  AS SEPARATE  REITS.   The General  Partners
considered  the  advisability  of reorganizing  each  of the  Partnerships  as a
separate corporation taxed as  a REIT, which could  provide Unitholders some  of
the  advantages to be secured by the Mergers, such as providing investors in the
reorganized entities with  some liquidity  through the listing  of their  equity
securities  in a  recognized trading  market and  simplified federal  income tax
reporting. In  addition, the  reorganizations could  be effected  on a  tax-free
basis,  unlike the Mergers, which  will be a taxable  event for Unitholders. The
reorganizations of the Partnerships would, however, result in substantial  costs
and  expenses,  and, due  to the  size  of the  Partnerships, access  to capital
markets and  the  liquidity of  the  reorganized entity's  securities  could  be
limited.  The  General  Partners  have  concluded  that  the  Mergers  are  more
attractive than  the  reorganizations  of the  Partnerships  as  separate  REITs
because the separate REITs would not provide, or would provide on a more limited
basis, the advantages expected
 
                                       39
<PAGE>
from  the Mergers, including the elimination of potential conflicts of interest,
simplified  administration,   self-administration,   growth   potential,   asset
diversification  and  improved  access  to  capital  markets.  See  "-- Expected
Benefits From the Mergers."
 
                            FAIRNESS OF THE MERGERS
 
CONCLUSIONS OF THE GENERAL PARTNERS
 
    The General Partners believe that the terms of the Mergers, when  considered
as  a whole,  are fair to  the Unitholders of  each of the  Partnerships and the
Shares offered in  exchange for the  Units of the  Partnerships constitute  fair
consideration  for the interests of the  Unitholders. This section discusses the
factors upon which the General Partners  have based their conclusions as to  the
fairness  of the  Mergers and should  be carefully reviewed  by Unitholders. The
General Partners  did  not find  it  practicable to,  and  did not  attempt  to,
quantify  the relative importance of these factors, but have, where appropriate,
noted which  of the  factors support  or detract  from their  belief as  to  the
fairness of the Mergers to Unitholders.
 
DETERMINATION OF MERGER CONSIDERATION
 
    The  General Partners believe that the  methods used to determine the Merger
Consideration are  fair to  Unitholders.  For each  Partnership, the  number  of
Shares  that would  be received per  Unit in each  of the Mergers  is derived by
dividing (i) the Partnership's  Net Asset Value that  would be allocated to  one
Unit  if the Partnership's Net Asset Value were distributed in accordance with a
Dissolution in accordance with the Partnership Agreement by (ii) the Share Price
(the average of the  per share closing  prices of the Common  Stock on the  NYSE
during  the 20 consecutive trading days ending on the fifth trading day prior to
the Vote Date).
 
    If the Share  Price exceeds  $27.75, then  for purposes  of calculating  the
number  of Shares to be issued  in each of the Mergers,  the Share Price will be
deemed to equal $27.75, and,  if the Share Price is  less than $22.25, then  for
purposes  of  calculating the  number  of Shares  to be  issued  in each  of the
Mergers, the Share  Price will be  deemed to  equal $22.25. If  the Share  Price
exceeds  $28.50,  the  Company  has  the  right  to  terminate  the  Acquisition
Agreement, and if  the Share  Price is  less than  $21.50, each  of the  General
Partners  may withdraw its  recommendation in favor of  the applicable Merger or
terminate the Acquisition Agreement, subject to the Company's option to pay  the
Additional  Consideration. If the  Share Price is between  $27.75 and $28.50 and
all other conditions to the applicable Merger are satisfied, the Merger will  be
consummated  and Unitholders will receive  Shares with a value  in excess of the
Net Asset Value per Unit.  If the Share Price is  between $21.50 and $22.25  and
all  other conditions to the applicable Merger are satisfied, the Merger will be
consummated and Unitholders will receive Shares  with a value that is less  than
the Net Asset Value per Unit.
 
    The  General Partners  believe that the  methods for  determining the Merger
Consideration are fair because  (i) the closing prices  of the Shares have  been
within the Share Price Range for more than a year, (ii) a fluctuation in average
share  prices outside  of the  Share Price  Range will  likely be  due to market
forces not directly  related to  the intrinsic value  of the  Shares, (iii)  the
Share  Price Range provides  reciprocal protection for  each of the Partnerships
and the Company, (iv)  the $.75 difference  between the lower  end of the  Share
Price  Range  and the  Share Price  at which  each of  the General  Partners may
withdraw  its  recommendation  and   terminate  the  Acquisition  Agreement   is
approximately  equal to  the amount the  General Partners estimate  would be the
applicable Partnership's cost to negotiate and present a revised merger proposal
to Unitholders if the  applicable Merger were not  consummated on its  currently
contemplated  terms and (v) under certain circumstances, Unitholders may receive
Shares with a value in  excess of Net Asset  Value per Unit. Unitholders  should
note  that the  Stanger Fairness  Opinions do  not address  the fairness  of the
Merger Consideration if the Share Price is less than $22.25.
 
                                       40
<PAGE>
    The  following table sets forth  the calculation of the  Net Asset Values of
the Partnerships.
 
              CALCULATION OF NET ASSET VALUE AS OF MARCH 31, 1996
 
<TABLE>
<CAPTION>
                                                                       IDS1            IDS2            IDS3
                                                                  --------------  --------------  ---------------
<S>                                                               <C>             <C>             <C>
Appraised value of real estate assets...........................  $   40,370,000  $   30,520,000  $    50,890,000
Balance sheet adjustments:
  Cash and cash equivalents.....................................         625,600         367,914          395,166
  Other assets..................................................         342,800         193,561          358,552
  Mortgages, lines of credit and other liabilities..............        (331,900)     (3,589,529)     (11,063,975)
  Estimated transaction costs...................................        (939,800)       (630,100)        (930,100)
                                                                  --------------  --------------  ---------------
Total balance sheet adjustments.................................        (303,300)     (3,658,154)     (11,240,357)
                                                                  --------------  --------------  ---------------
Net Asset Value of Partnership..................................  $   40,066,700  $   26,861,846  $    39,649,643
                                                                  --------------  --------------  ---------------
                                                                  --------------  --------------  ---------------
</TABLE>
 
        ALLOCATION OF NET ASSET VALUE AMONG GENERAL AND LIMITED PARTNERS
 
<TABLE>
<CAPTION>
                                                                       IDS1            IDS2            IDS3
                                                                  --------------  --------------  ---------------
<S>                                                               <C>             <C>             <C>
Net Asset Value allocable to General Partner....................  $    2,003,335  $    1,343,092  $     2,960,762
Net Asset Value allocable to Unitholders........................      38,063,365      25,518,754       36,668,881
Net Asset Value per Unit........................................             257             222              308
</TABLE>
 
FAIRNESS OF THE MERGERS TO THE UNITHOLDERS
 
    REAL ESTATE PORTFOLIO APPRAISALS.  The General Partners have relied in  part
upon  the Appraisals prepared by Stanger, an independent appraiser, to establish
the Appraised  Values of  the Partnerships'  real estate  assets. The  Appraised
Values were utilized in determining the Net Asset Value of each Partnership. See
"Appraisals and Opinions of Financial Advisors."
 
    STANGER FAIRNESS OPINION.  The General Partners have relied in part upon the
Stanger   Fairness  Opinion  to   support  their  conclusion   that  the  Merger
Consideration constitutes fair consideration to  the Unitholders for the  Units.
Subject  to the  assumptions, qualifications  and limitations  set forth  in the
Stanger Fairness Opinion, Stanger concluded that, as of the date of the  Stanger
Fairness  Opinion, the Merger  Consideration was fair to  the Unitholders from a
financial point  of view.  The Stanger  Fairness Opinion  does not  address  the
fairness of any of the terms of the Mergers other than the Merger Consideration.
The  Stanger Fairness Opinion is based  upon business, economic, real estate and
securities markets,  and other  conditions as  of  July 1,  1996, and  does  not
reflect  any changes in those conditions that may have occurred since that date.
See "Appraisals and Opinions of Financial Advisors."
 
    COMPARISON OF  CERTAIN  BENEFITS  AND  DETRIMENTS  OF  ALTERNATIVES  TO  THE
MERGERS.     Prior  to  concluding  that  the  Mergers  should  be  proposed  to
Unitholders,  the  General  Partners  considered  several  alternatives  to  the
Mergers,   including  liquidation  of  the  Partnerships,  continuation  of  the
Partnerships, support  of  the  secondary  market  and  reorganizations  of  the
Partnerships  as  separate  corporations  taxed as  REITs.  See  "Background and
Reasons for the Mergers  -- Alternatives to the  Mergers." To determine  whether
the  Mergers  or one  of  their alternatives  would  be more  attractive  to the
Unitholders, the  General  Partners  compared  certain  potential  benefits  and
detriments  of the Mergers with certain potential benefits and detriments of the
alternatives. Based  upon  this comparison,  the  General Partners  believe  the
Mergers  are more attractive than the alternatives. See "Reasons for the Mergers
- -- Alternatives to Mergers."
 
    DISTRIBUTIONS IN ACCORDANCE WITH ORIGINAL INVESTOR UNDERSTANDINGS.  Each  of
the  Partnership Agreements sets forth  a procedure for allocating distributions
among the Unitholders  and the  General Partner. These  distribution rules  were
described  in detail  in the disclosure  documents delivered  to the Unitholders
when, through  the sale  of the  Units,  capital was  originally raised  by  the
Partnerships, and
 
                                       41
<PAGE>
constituted  the basis  upon which  Unitholders elected  to invest  funds in the
Partnerships. The General Partners have followed the original distribution rules
in determining the Shares to be received by the Unitholders and General  Partner
of each of the Partnerships.
 
    FAIRNESS  IN  VIEW  OF CONFLICTS  OF  INTEREST.   The  Company,  the General
Partners  and  their  affiliates  have  significant  conflicts  of  interest  in
connection  with the Mergers, and no unaffiliated representatives were appointed
to negotiate the terms of the Mergers on behalf of any of the Partnerships.  See
"Conflicts  of  Interest." The  General  Partners believe,  however,  that their
determination regarding the fairness  of the Mergers was  based upon the  proper
exercise of their fiduciary duties, unaffected by these conflicts of interest.
 
    ALLOCATION  OF MERGER EXPENSES.  The General Partners believe the procedures
for allocating  the  expenses of  the  Mergers  are fair  to  the  Partnerships,
inasmuch  as each of the Partnerships (i) will  bear its pro rata portion of the
Shared Expenses based on its relative Net Asset Value if Unitholders approve the
applicable Merger and (ii) will bear only  a percentage of its pro rata  portion
of the Shared Expenses equal to the percentage of Unitholders voting in favor of
the  applicable Merger if Unitholders do not  approve that Merger and if certain
other events have not  occurred. While the  Acquisition Agreement provides  that
the  Partnerships, except for  IDS1, will pay  a pro rata  portion of the Shared
Expenses and the  Individual Expenses  that would  otherwise be  payable by  the
Company  if the  Acquisition Agreement  is terminated  for certain  reasons, the
General Partner believes this is fair because the circumstances under which such
expenses would be provided by the Partnerships are generally situations in which
the Partnerships  have  entered  into  an  alternative  transaction,  presumably
resulting  in greater value to Unitholders and  prompted at least in part by the
proposed Mergers. See "The Acquisition Agreement -- Fees and Expenses."
 
    IMPACT OF MERGER ON PARTNERSHIP DISTRIBUTIONS.  The Merger Consideration  to
be  received by Unitholders is based primarily upon the Net Asset Value of their
respective Partnership. Recognizing that there may be changes in a Partnership's
values between March 31, 1996 (the date on which the Net Asset Values are based)
and the Partnership's Closing Date  and that it is  a condition to that  Closing
that  the respective Partnership's Closing  Net Asset Value is  no less than its
Net Asset  Value,  the  General  Partner  of  the  Partnership  may  delay  cash
distributions  if it  deems appropriate.  As soon  as practicable  following the
Closing for a  particular Partnership,  pre-Merger Unitholders  and the  General
Partner  of that  Partnership will receive  a cash distribution  in an aggregate
amount equal to the amount, if any, by which the Partnership's Closing Net Asset
Value exceeds its Net Asset Value. If a Partnership does not participate in  the
Mergers,  the Mergers may only temporarily delay, but are not otherwise expected
to affect or reduce (except for  the Partnership's portion of Merger  expenses),
the  total distributions  made by the  Partnership. The General  Partners do not
consider this  delay or  reduction in  distributions due  to payment  of  Merger
expenses  to  affect materially  the  fairness of  the  Mergers with  respect to
Unitholders.
 
    WASHINGTON STATUTORY DISSENTERS' RIGHTS.  Unitholders who are opposed to the
Mergers will be entitled to statutory dissenters' rights under the WULPA.  Under
the  WULPA, Unitholders  opposing the  Mergers may  contest the  fairness of the
value of the Merger Consideration, request that any unresolved dispute regarding
the value  of the  assets be  determined by  an appraiser  or appraisers  to  be
selected  by a  Washington Superior  Court and  require that  their interests be
purchased for an all  cash payment. Dissenting  Unitholders would not,  however,
have  the right to  prevent their Partnership's participation  in the Mergers if
their Partnership's Merger is approved by  the requisite vote of the  applicable
Unitholders. See "Dissenters' Rights of Unitholders."
 
COMPARISON OF MERGER CONSIDERATION TO ALTERNATIVES
 
    GENERAL.    To assist  Unitholders in  evaluating  the Mergers,  the General
Partner of each Partnership  has attempted to  compare the Merger  Consideration
with  (i) the prices at which the Units have been sold in the illiquid secondary
market, (ii) estimates of the value of the Units on a liquidation basis assuming
that the Partnership's assets were sold  at their fair market value (based  upon
the  Appraisals)  or net  book value  and  the net  proceeds distributed  to the
General Partner and Unitholders in
 
                                       42
<PAGE>
accordance with the applicable Partnership Agreement and (iii) estimates of  the
value  of  the Units  on a  going  concern basis  assuming that  the Partnership
continued as an operating business and its assets were sold at the end of  2000.
Due to the uncertainty in establishing these values, the General Partner has, in
instances  it deemed  appropriate, established a  range of  estimated values for
each alternative, representing a high and low estimated value for the  potential
consideration.   Each  of  the  General  Partners  believe  that  analyzing  the
alternatives in  terms of  ranges  of estimated  value, established  based  upon
currently  available market data and,  where appropriate, reasonable assumptions
made  in  good   faith,  establishes  a   reasonable  framework  for   comparing
alternatives.  The results  of this comparative  analysis are  summarized in the
table below.
 
    The estimated values are  based upon information  available to each  General
Partner  at  the  time  they  were  computed,  including  historical information
regarding the applicable Partnership and current real estate markets, and  there
can  be no assurance  that the same  conditions analyzed by  each of the General
Partners in arriving at the estimates would exist at the time of consummation of
the Mergers.  In addition,  the estimated  values assigned  to the  alternatives
below  are based on a variety of assumptions that have been made by each General
Partner that  relate, among  other things,  to (i)  the Share  Price as  of  the
Closing  Date for the applicable Merger being within the Share Price Range, (ii)
projections as to  the Partnership's  future revenues, expenses,  cash flow  and
other significant financial matters, (iii) the capitalization rates that will be
used  by prospective buyers  when the Partnership's  assets are liquidated, (iv)
selling costs, (v) appropriate discount rates to apply to expected cash flows in
computing the present value of the cash flows and (vi) the manner of sale of the
Partnership's properties.
 
    The estimated values presented in  the following table are  "forward-looking
statements"  within the meaning of the  Private Securities Litigation Reform Act
of 1995. Actual results may  vary from those set  forth below based on  numerous
factors,  including interest rate fluctuations,  changes in capitalization rates
used by  prospective  purchasers,  tax  law  changes,  increased  supply  of  or
decreased demand for self storage facilities leading to lower occupancy rates or
lower  rental rates, the manner in which the properties are sold and the related
selling costs and changes in availability of capital to finance acquisitions  of
self storage properties. Each Unit in the following table represents an original
investment of $250.
 
<TABLE>
<CAPTION>
                                                                                                         ESTIMATED LIQUIDATION
                                                                                    ESTIMATED GOING     VALUE PER UNIT ASSUMING
                                                              SECONDARY MARKET                          PARTNERSHIP ASSETS SOLD
                                                                                   CONCERN VALUE PER              AT:
                                              MERGER         PRICE PER UNIT (2)         UNIT (3)        ------------------------
                                           CONSIDERATION    --------------------  --------------------   APPRAISED    NET BOOK
PARTNERSHIP                                PER UNIT (1)       HIGH        LOW       HIGH        LOW      VALUE (4)    VALUE (5)
- ---------------------------------------  -----------------  ---------  ---------  ---------  ---------  -----------  -----------
<S>                                      <C>                <C>        <C>        <C>        <C>        <C>          <C>
IDS1...................................      $     257      $     198  $     150  $     251  $     235   $     253    $     175
IDS2...................................            222            185        162        218        203         217          183
IDS3...................................            308            200        165        304        283         299          192
</TABLE>
 
- ------------------------
(1)  Assumes  the  Share Price  is  within  the Share  Price  Range.  The Merger
    Consideration is payable in  Shares and cash in  lieu of fractional  Shares.
    See "-- Determination of Merger Consideration."
 
(2)  The secondary  market prices  are those reported  to Stanger  for the first
    calendar quarter of 1996. See "Distributions  and Market Prices of Units  --
    Market Prices of Units."
 
(3)  The going concern  value estimates are  based upon a  number of assumptions
    regarding the  future net  operating income  and cash  distributions of  the
    Partnership  and assume a disposition of the Partnership's assets at the end
    of 2000. See "-- Comparison of Merger Consideration to Alternatives -- Going
    Concern Values."
 
(4) Estimated Liquidation Value at Appraised  Value is based primarily upon  the
    Appraisals  and adjustments for  non-real estate assets  and liabilities and
    estimated selling  costs.  See  "--Comparison  of  Merger  Consideration  to
    Alternatives -- Liquidation Values."
 
                                       43
<PAGE>
(5)  Estimated Liquidation Value at  Net Book Value is  computed as of March 31,
    1996  less  estimated   selling  costs.   See  "--   Comparison  of   Merger
    Consideration to Alternatives -- Liquidation Values."
 
    SECONDARY  MARKET PRICES OF UNITS.  The data in the table above on secondary
market activity shows  the highest and  lowest secondary market  prices for  the
Units  in the first calendar  quarter of 1996 as  reported to Stanger by certain
secondary market firms involved  in sales of the  Units. See "Distributions  and
Market Prices of Units -- Market Prices of Units."
 
    Limited  partnerships are  designed as  illiquid, long-term  investments. No
market for  the Units  was ever  expected to  develop and  the secondary  market
transactions  for the Units have  been limited and sporadic.  It is not known to
what extent the transactions in the secondary market are between willing  buyers
and  willing sellers, each  having access to  relevant information regarding the
financial affairs of the Partnerships, the  expected value of their assets,  and
their  prospects for the  future. Many transactions in  the secondary market are
believed to be distressed sales where sellers are highly motivated to dispose of
the Units and willing to accept substantial discounts from what might  otherwise
by  regarded as  the fair  value of  the interest  being sold  to facilitate the
sales. Secondary market prices generally do not reflect the current market value
of the Partnerships' assets, nor are they indicative of total return since prior
cash distributions and tax benefits  received by the original investor  probably
are   not   reflected   in  the   price.   Nonetheless,   notwithstanding  these
qualifications, the secondary  market prices,  to the extent  that the  reported
data  are reliable, are indicative of the prices at which the Units trade in the
illiquid secondary markets.
 
    GOING CONCERN VALUES.  The General Partners have estimated the going concern
value of each of the Partnerships by analyzing each Partnership's projected cash
distributions, assuming that the Partnership was operated as an ongoing business
through the  end  of  2000 and  its  assets  sold  at that  time  based  upon  a
capitalization  of projected property cash flows  in 2001. Each Unitholder would
be entitled to receive a pro rata share of the quarterly distributions from  his
or   her  Partnership's  cash   available  for  distribution   and  the  special
distribution of  the  liquidation  proceeds, net  of  existing  liabilities,  in
accordance with the Partnership Agreements. This analysis is consistent with the
expectation that each of the Partnerships would be a finite-life investment. The
assumption  of property dispositions in 2000  is consistent with the anticipated
disposition timeframes for IDS2 and IDS3 and one year later than the anticipated
disposition timeframe for IDS1.
 
    The General Partners have presented two estimates of the going concern value
of each of the Partnerships  on a per Unit basis,  which estimates are based  on
the five-year property cash flows beginning in 1996 used by Stanger in preparing
the  Appraisals,  adjusted for  general and  administrative expenses  (which are
assumed to  increase at  a rate  of 3.5%  per year)  and debt  service  payments
(principal  and interest),  where applicable.  The going  concern value  of each
Partnership was  established by  computing the  present value  of the  projected
distributions  with respect to the applicable Partnership's Units, discounted at
a rate of 13%, 13.25% and 13.5% per annum for IDS1, IDS2 and IDS3, respectively,
under the conservative scenario and at a rate of 12%, 12.25% and 12.5% per annum
for IDS1, IDS2 and IDS3, respectively, under the more favorable scenario,  which
rates  take into consideration, among other factors, differences in the leverage
levels of each Partnership. Under the conservative scenario, each  Partnership's
assets  are sold at the end of 2000 for an all-cash purchase price sufficient to
yield the buyer a 10.5% return  based on the applicable Partnership's  projected
property  cash flows for 2001. Under the  more favorable scenario, it is assumed
that the  Partnership's assets  are sold  at the  end of  2000 for  an  all-cash
purchase  price  sufficient to  yield  the buyer  a  10% return  based  upon the
applicable Partnership's projected property cash flows in 2001.
 
    The going concern analysis assumes  all of the Partnerships' properties  are
sold  in a single transaction at the end  of 2000 with selling expenses equal to
4% of then current  real estate value. If,  instead, the assets were  liquidated
over  time,  even  at prices  equal  to  those projected,  distributions  to the
Unitholders out of the Partnerships' cash flow from operations might be  reduced
because the
 
                                       44
<PAGE>
Partnerships'  relatively  fixed  costs,  such  as  general  and  administrative
expenses, would not be proportionately  reduced with the liquidation of  assets.
Accordingly, the General Partners believe the assumption that all the properties
are  sold in a  single transaction results  in the most  favorable valuation for
Unitholders.
 
    LIQUIDATION VALUES.  Since one of the alternatives available to the  General
Partners  is  to  proceed  with  a  liquidation  of  the  Partnerships,  and the
corresponding distribution  of  the  net liquidation  proceeds  to  the  General
Partners  and Unitholders, the  General Partners have  estimated the liquidation
value of the Units  (i) assuming that the  Partnerships' real estate  portfolios
were  sold  at  their  Appraised  Values and  that  non-real  estate  assets and
liabilities were sold at their book value except for amortizable assets and (ii)
assuming that all of the Partnerships' assets and liabilities were sold at their
net book value.  Both alternatives  assume that the  Partnerships incur  selling
costs  of 4% of the  real estate assets' value  and the net liquidation proceeds
are distributed among the  General Partners and  Unitholders in accordance  with
the applicable Partnership Agreement.
 
    The  liquidation analysis assumes that  each of the Partnerships' portfolios
is sold in a single  transaction at its Appraised Value  or net book value.  If,
instead,  the assets were  liquidated over time,  even at prices  equal to those
projected, distributions to the Unitholders  out of the Partnerships' cash  flow
from  operations  might be  reduced because  the Partnerships'  relatively fixed
costs, such as general and administrative expenses, would not be proportionately
reduced with  the  liquidation  of  assets.  Accordingly,  the  General  Partner
believes  the  assumption  that all  of  the  properties are  sold  in  a single
transaction results in the most favorable valuation for Unitholders.
 
    Of the two columns provided for  liquidation values in the above table,  the
General  Partners  believe that  the liquidations  at  Appraised Value  are more
reflective of the amounts that would actually be distributed to the  Unitholders
if  the  Partnerships  were  to  proceed  with  liquidating  their  assets.  See
"Appraisals and Opinions of  Financial Advisors --  Portfolio Appraisals of  the
Partnerships'  Properties." The Appraisals  set forth, subject  to the specified
assumptions, limitations and qualifications,  Stanger's professional opinion  as
to the market value of the Partnerships' real estate portfolios. While the price
at  which the assets  would sell if actually  liquidated could differ materially
from the Appraised Values, the Appraisals are intended to estimate the prices at
which the  real estate  assets would  sell  if disposed  of in  an  arm's-length
transaction  between a willing buyer and a willing seller, each having access to
relevant information  regarding  the historical  revenues  and expenses  of  the
properties.  The Appraisals assume that the Partnerships' assets are disposed of
in an  orderly manner  and are  not sold  in forced  or distressed  sales  where
sellers might be expected to dispose of their interests at substantial discounts
to their actual fair market value.
 
    In  contrast, the net  book value represents the  value of the Partnerships'
equity as of  March 31,  1996, computed in  accordance with  GAAP, less  selling
costs equal to 4% of the book value of the Partnerships' real estate assets. The
net  book value computations are not adjusted  for, or intended to be, estimates
of the fair  market value  of the real  estate assets.  Nonetheless, since  book
value is a commonly used accounting principle, and shows the values at which the
assets  are carried on  the Partnerships' books,  it does establish  a basis for
comparing the value of the Units to other commonly used measures of value.
 
DISTRIBUTION COMPARISON
 
    The General Partners  have considered  the potential impact  of the  Mergers
upon  distributions  that would  be made  to Unitholders  becoming stockholders.
Depending upon the  Share Price used  to determine  the number of  Shares to  be
issued  in  the  Mergers,  after  the  Mergers  the  level  of  distributions to
Unitholders who have become Company stockholders may be higher or lower than the
level of distributions  with respect to  their Units prior  to the Mergers.  The
General   Partners  believe  that  such   changes  in  distribution  levels  are
justifiable when taking into  account differences in  the Partnerships' and  the
Company's  cash distribution policies,  principal and interest  payments on debt
and  capital  expenditure  levels.   The  table  below   shows  the  pro   forma
distributions  that  would  have been  made  to  Unitholders as  if  they became
stockholders  on  January  1,  1996,  using  the  actual  distribution  made  by
 
                                       45
<PAGE>
the  Company relating to results  of operations for the  quarter ended March 31,
1996 ($.47 per share of Common Stock), assuming that all Partnerships elected to
participate in  the Mergers  and the  Mergers occurred  on January  1, 1996  and
rounding  the number of  Shares to be  received to the  nearest whole Share. The
table compares these  pro forma  estimates against the  actual distributions  to
Unitholders  attributable to first quarter 1996 Partnership operations (not upon
the amounts that  might have  been distributed  by the  Partnerships based  upon
their cash balances).
 
<TABLE>
<CAPTION>
                                                                    PRO FORMA                   PRO FORMA
                                                                  MARCH 31, 1996             MARCH 31, 1996
                                                                 DISTRIBUTION AT             DISTRIBUTION AT
                                            QUARTER ENDED       $22.25 SHARE PRICE         $27.75 SHARE PRICE
                                           MARCH 31, 1996   --------------------------  -------------------------
PARTNERSHIP                                 DISTRIBUTION        $         % CHANGE          $         % CHANGE
- -----------------------------------------  ---------------  ---------  ---------------  ---------  --------------
<S>                                        <C>              <C>        <C>              <C>        <C>
IDS1.....................................     $    4.84     $    5.64           17%     $    4.23         (13)%
IDS2.....................................          4.06          4.70           16           3.76          (7)
IDS3.....................................          4.69          6.58           40           5.17          10
</TABLE>
 
    When  reviewing  this data,  Unitholders should  consider  that a  number of
factors affect the level of the Partnerships' quarterly distributions, including
the  distributable  income  generated  by  the  Partnerships'  operations,   the
principal  and interest payments on  the Partnerships' debt, capital expenditure
levels (in excess of  normal expenditures for  ongoing maintenance and  repairs)
and  the Partnerships' policy  with respect to  quarterly cash distributions. In
some cases,  the Partnerships  have, in  order to  maintain constant  levels  of
distributions,  made quarterly distributions in excess  of cash generated by the
Partnerships' operations during the preceding quarter. The Partnerships' ability
to make such  an excess  distribution would also  be affected  by existing  cash
reserves  and the ability to borrow funds necessary to make the distribution. In
addition, the portion of total assets and debt represented by income  generating
real  estate  versus  cash  and non-cash  generating  assets  differs  among the
Partnerships. Such differences impact to some degree the amount of distributable
cash generated relative  to the Net  Asset Values of  the Partnerships. For  the
foregoing  reasons, a  comparison of  pro forma  and actual  distributions for a
single period does not clearly show how the Mergers might affect a Partnership's
distribution levels when analyzed over a number of years.
 
CONCLUSIONS OF THE SPECIAL COMMITTEE
 
    The Special Committee of the Board of Directors of the Company has  reviewed
the  terms of the Mergers and believes that the Mergers are fair to Unitholders.
In determining  the fairness  of the  Mergers to  the Unitholders,  the  Special
Committee  considered a number of factors,  including the following, and did not
assign relative weights to them in reaching its conclusion.
 
    RECOMMENDATION OF THE  GENERAL PARTNERS.   The Special Committee  considered
the  fact that each General Partner, in  discharging its fiduciary duties to the
Unitholders of its Partnership, (i) carefully  reviewed the terms of the  Merger
of its Partnership, (ii) concluded that the Merger of its Partnership is fair to
the  Unitholders and (iii) recommends that  the Unitholders vote for approval of
the  Acquisition  Agreement  and  the  transactions  contemplated  thereby.  See
"Background and Reasons for the Mergers -- General Partners' Recommendations and
Reasons."
 
    CONSENT  OF IPSC.   The Special Committee  considered the fact  that IPSC, a
limited partner of each of the General Partners which is not affiliated with the
Company, consented to the Mergers. The Special Committee noted that pursuant  to
the GP Agreements the consent of IPSC may be required to consummate the Mergers.
 
    APPRAISALS.   The Special  Committee considered the  Appraisals delivered to
the General Partners by Stanger and the  fact that the Net Asset Value is  based
in  large part  on the  Appraisals. Copies  of the  Appraisals, which  set forth
discussions of the specific assumptions,  limitations and qualifications of  the
analysis    undertaken,   are   attached   as   Appendix   B   to   this   Proxy
Statement/Prospectus and should be  read in their  entirety by each  Unitholder.
See  "Appraisals and Opinions  of Financial Advisors  -- Portfolio Appraisals of
the Partnerships' Properties."
 
                                       46
<PAGE>
    FAIRNESS OPINION.   The Special  Committee considered  the Stanger  Fairness
Opinion   delivered  to  the   General  Partner  by   Stanger  that  the  Merger
Consideration is fair to  the Unitholders of each  Partnership from a  financial
point  of view.  A copy of  the Stanger  Fairness Opinion, which  sets forth the
assumptions made, matters considered and  limitations of the review  undertaken,
is  attached as Appendix C to this Proxy Statement/Prospectus and should be read
in its entirety by  each Unitholder. See "Appraisals  and Opinions of  Financial
Advisors -- Opinions of the Partnerships' Financial Advisor."
 
    PREMIUM  OVER RECENT  MARKET PRICES.   The Special  Committee considered the
fact that the Merger Consideration (assuming the Share Price remains within  the
Share  Price Range) represents a premium of more  than 28%, 19% and 53% over the
highest sales price in the secondary market of an IDS1 Unit, IDS2 Unit and  IDS3
Unit,  respectively, known  to the General  Partners since January  1, 1992. See
"Distributions and Market Prices of Units -- Market Prices of Units."
 
                           THE ACQUISITION AGREEMENT
 
    The following  is  a  summary  of  certain  provisions  of  the  Acquisition
Agreement,   a  copy  of  which  is  attached   as  Appendix  A  to  this  Proxy
Statement/Prospectus and is incorporated herein by reference. This summary  does
not  purport to be complete and is qualified in its entirety by reference to the
full text of the Acquisition Agreement.
 
THE MERGERS
 
    Subject to the  terms and conditions  of the Acquisition  Agreement, at  the
effective  time of  the Mergers  (the "Effective  Time") each  Partnership as to
which the  conditions  to  closing  have  been  satisfied  or  waived  (each,  a
"Participating  Partnership") will be  merged with and into  the Company. At the
Effective Time, the  separate existence of  the Participating Partnerships  will
cease, and the Company will continue as the surviving entity of the Mergers.
 
    At  the Effective Time, each Unit (other than Units owned by the Company and
Units owned by Unitholders exercising dissenters' rights) and the GP Interest of
each of  the Participating  Partnerships will  be converted  into the  right  to
receive (i) that number of Shares calculated by dividing (a) the Net Asset Value
of  the applicable  Partnership that would  be allocated  to one Unit  or the GP
Interest, as  the  case  may  be,  if the  Partnership's  Net  Asset  Value  was
distributed  in a Dissolution by (b) the Share  Price and (ii) the amount of the
Additional Consideration, if any is payable, that would be allocated to one Unit
or the GP  Interest, as the  case may  be, if the  Additional Consideration  was
distributed  in a Dissolution, and (iii) cash in lieu of a fractional Share. All
Units owned by the Company will be cancelled upon consummation of the Merger.
 
    In the event the  Share Price exceeds $28.50  for a particular  Partnership,
the  Company has  the right  to terminate the  Acquisition Agreement  as to that
Partnership. In the event the Share Price  is less than $21.50 for a  particular
Partnership,   the  General  Partner  of   that  Partnership  may  withdraw  its
recommendation in favor of  the applicable Merger  or terminate the  Acquisition
Agreement;  provided, however, that  prior to withdrawing  its recommendation or
terminating the  Acquisition  Agreement  as to  that  Partnership,  the  General
Partner, if so requested by the Company, must adjourn the Special Meeting of the
applicable  Partnership for up to ten business  days and the General Partner may
not withdraw its recommendation if, at least two business days prior to the date
of the  adjourned Special  Meeting, the  Company agrees  to pay  the  Additional
Consideration.  Additional Consideration,  with respect to  each Partnership, is
that amount of cash equal to the  difference between the actual Share Price  and
$21.50,  multiplied  by the  number of  Shares  to be  issued in  the applicable
Merger.
 
    The Acquisition Agreement  provides that  in the  event the  payment of  the
Merger  Consideration pursuant to the Acquisition  Agreement would result in the
issuance by the Company  of more than  20% of the  outstanding shares of  Common
Stock,   the   Company   may   elect   to   pay   cash   in   lieu   of   shares
 
                                       47
<PAGE>
of Common Stock in excess of such amount. The Company currently does not  expect
that  the number  of Shares  issued pursuant  to the  Acquisition Agreement will
exceed 20% of the outstanding shares of Common Stock.
 
REPRESENTATIONS AND WARRANTIES
 
    In the Acquisition Agreement, the  Company has made various  representations
and  warranties to  each Partnership,  including representations  and warranties
relating to (i) the due organization of  the Company and its authority to  enter
into  the  Acquisition  Agreement,  (ii)  the absence  of  the  need  (except as
specified) for third-party or  governmental consents to  the Mergers, (iii)  the
Mergers'  nonviolation  of  laws  and material  agreements,  (iv)  the Company's
capitalization, (v) the  due authorization  of the Shares  to be  issued in  the
Mergers,  (vi)  the  accuracy  of  publicly  filed  documents,  (vii)  financial
statements, (viii) full disclosure and (ix) the absence of material litigation.
 
    In  addition,  each  Partnership   has  made  various  representations   and
warranties   to  the  Company,  including  (i)   the  due  organization  of  the
Partnership, (ii) its authority to  enter into the Acquisition Agreement,  (iii)
the  absence of the  need (except as specified)  for third-party or governmental
consents to  its Merger  and  its Merger's  nonviolation  of laws  and  material
agreements,  (iv)  the  accuracy  of  publicly  filed  documents,  (v) financial
statements, (vi)  full disclosure,  (vii) the  absence of  defaults of  material
agreements,  (viii) the absence of material litigation, (ix) title to assets and
properties and  the absence  of  environmental liabilities  and (x)  payment  of
taxes.
 
CONDUCT OF BUSINESS PENDING THE EFFECTIVE TIME
 
    Each Partnership has agreed that, prior to the Effective Time or the earlier
termination  of the Acquisition Agreement, it will  carry on its business in the
ordinary course in  substantially the  same manner as  previously conducted  and
will  use  its  reasonable  efforts  to  preserve  intact  its  present business
organization and  goodwill, maintain  permits, licenses  and authorizations  and
preserve  its relationship with third parties. In addition, each Partnership has
agreed to  use its  best efforts  to  manage its  business, including,  but  not
limited to, suspending cash distributions to its partners if the General Partner
deems  it advisable to do so, so  that the Partnership's Closing Net Asset Value
will not be  less than  the Partnership's  Net Asset  Value. To  the extent  the
Partnership's  Closing  Net Asset  Value  exceeds its  Net  Asset Value,  a cash
distribution in the  amount of  such excess will  be made  to the  Partnership's
pre-Merger  Unitholders and General Partner in  accordance with the terms of the
applicable Partnership Agreement as soon as practicable following the Closing.
 
IPSC CONSENT
 
    Pursuant to the GP Agreements, the general partners of the General  Partners
may  not have authority  to approve the  Mergers without the  consent of IPSC, a
limited partner of each of the General Partners which is not affiliated with the
Company. IPSC  reviewed  the registration  statement  relating to  the  Mergers,
including  the preliminary Proxy Statement/Prospectus  in substantially the form
intended to  be  finalized  and  filed  with  the  Commission,  the  Acquisition
Agreement,  the draft Appraisals  and the form of  the Stanger Fairness Opinion,
and retained independent legal counsel. IPSC  did not conduct any due  diligence
review  of the information contained in  this Proxy Statement/Prospectus and has
not participated in the management or control of the Partnerships. Based on  its
review  of documents, the General Partners' review of alternatives to the Offers
and the Mergers and the Stanger Fairness Opinion, IPSC consented to the Mergers.
IPSC has  significant conflicts  of  interest in  the  Mergers because,  if  the
Mergers  are consummated, IPSC would receive  (based upon an assumed Share Price
of $25.00) approximately 32,050,  21,500 and 52,600 Shares  with respect to  its
limited  partnership interests  in the  IDS1 General  Partner, the  IDS2 General
Partner and the IDS3 General Partner, respectively. See "Conflicts of Interest."
 
STANDSTILL AGREEMENT
 
    The Company has  agreed that,  upon its  admission as  a substitute  limited
partner  with respect  to the  Units it  purchased in  the Offers,  it will not,
directly or indirectly, without the prior  written consent of a majority of  the
general  partners  of  the General  Partner  of the  applicable  Partnership (i)
acquire
 
                                       48
<PAGE>
any additional  Units of  the  Partnership, (ii)  propose  any merger  or  other
business  combination  involving  the  Partnership or  (iii)  propose  any other
transaction pursuant to which it would control  or acquire any of the assets  of
the Partnership.
 
NO SOLICITATION OF TRANSACTIONS
 
    Until the termination of the Acquisition Agreement, no Partnership will, nor
will  it permit its  partners (including any  general or limited  partner of its
General  Partner),   agents  or   other  representatives   (including,   without
limitation,  any investment banker,  attorney or accountant  retained by it) to,
directly or indirectly, initiate, solicit  or encourage, or, except as  required
by  law, including  fiduciary duties required  by law, engage  in discussions or
negotiations with or provide any information to any entity or group (other  than
the Company or an affiliate of the Company) concerning any acquisition proposal,
tender  offer,  exchange offer,  merger,  consolidation, sale  of  a substantial
amount of assets, or  sale of securities or  equity interests, or in  connection
with   a  liquidation,   dissolution  or  similar   transaction  involving  such
Partnership. Subject to fiduciary duty requirements of the General Partners, the
Partnerships have agreed to notify the Company immediately if any such inquiries
or proposals are  received by, any  such information is  requested from, or  any
such  negotiations or discussions are sought  to be initiated or continued with,
the Partnerships, and have agreed to keep the Company informed of the status and
terms of any such proposals and any such negotiations or discussions.
 
INDEMNIFICATION
 
    From and  after the  Effective Time,  the Company  will indemnify  and  hold
harmless  the General Partner of each  of the Participating Partnerships and its
general and limited  partners to the  same extent that  such persons would  have
been  entitled  to  indemnification  by the  Partnership  under  its Partnership
Agreement.
 
CONDITIONS PRECEDENT TO THE MERGERS
 
    The consummation of a Merger as  to any Partnership is not conditioned  upon
the  consummation of a Merger as to any other Partnership. In the event that the
conditions to Closing have been satisfied or  waived with respect to one or  two
Partnerships, the Mergers may be effected with respect to such Partnerships, and
in the event the conditions to Closing subsequently are satisfied or waived with
respect  to any additional Partnerships, the Mergers  may be effected as to such
Partnerships.
 
    CONDITIONS TO EACH PARTY'S OBLIGATIONS.  The respective obligations of  each
party  to effect  the Mergers are  subject to  the fulfillment on  or before the
Closing Date of the  following conditions: (i)  the Acquisition Agreement  shall
have been approved by the requisite vote of the Unitholders of the Partnerships;
(ii)  no injunctions relating to the Mergers  or any of the parties thereto that
would have  a material  adverse effect  on the  Company or  on the  business  or
properties  of the Partnerships, taken as a whole or individually, or that would
prevent  consummation  of  the  Mergers,   will  have  been  issued  or   remain
outstanding;  (iii) the Registration Statement will have been declared effective
by the Commission  under the  Securities Act and  no stop  order suspending  the
effectiveness of the Registration Statement shall have been issued; and (iv) the
Shares will have been authorized for listing on the NYSE upon official notice of
issuance.
 
    CONDITIONS  TO THE OBLIGATIONS OF THE COMPANY.  In addition to the foregoing
conditions, the  obligation of  the Company  to effect  the Mergers  as to  each
Partnership  is further subject to fulfillment or waiver before the Closing Date
of the following conditions:  (i) receipt of a  fairness opinion to the  Company
from  Alex. Brown as to  the fairness to the Company,  from a financial point of
view, of  the Merger  Consideration;  (ii) receipt  of  a certificate  from  the
General  Partner as of  the Closing Date  certifying that the  Closing Net Asset
Value of  each  Partnership  is  not  less than  the  Net  Asset  Value  of  the
Partnership;  (iii)  there will  have  been no  material  adverse change  in the
Partnership's ability  to  consummate  the  Mergers,  or  in  the  Partnership's
business,  operations, properties, assets or  condition, financial or otherwise,
since the  date  of the  Acquisition  Agreement; (iv)  the  representations  and
 
                                       49
<PAGE>
warranties  of the Partnership will  be true in all  material respects as of the
Closing Date; (v) all necessary consents and approvals from third parties  shall
have  been obtained; and  (vi) the Company  shall have received  an opinion from
counsel to the Partnership.
 
    CONDITIONS TO THE OBLIGATIONS OF THE  PARTNERSHIPS.  The obligation of  each
of  the Partnerships  to effect  the Mergers  is subject  to the  fulfillment or
waiver in writing by the applicable Partnership on or before the Closing Date of
the following conditions:  (i) the  Partnership will have  received the  Stanger
Fairness  Opinions; (ii) there has  not been any material  adverse change in the
Company's ability to pay the Merger Consideration, or in the Company's business,
operations, properties, assets or condition,  financial or otherwise, since  the
date  of the Acquisition Agreement; (iii)  the representations and warranties of
the Company contained in the Acquisition Agreement will be true in all  material
respects  as of the date of the Acquisition Agreement and on the Effective Date;
(iv) the Company will have performed  or complied with in all material  respects
all obligations, agreements and covenants contained in the Acquisition Agreement
to be performed and complied with by it on or prior to the Closing Date; (v) all
necessary  consents and approvals  from third parties  shall have been obtained;
and (vi) the  Partnership shall  have received an  opinion from  counsel to  the
Company.
 
TERMINATION
 
    With   respect  to  any  Partnership,   the  Acquisition  Agreement  may  be
terminated, and the  Merger may  be abandoned, at  any time  before the  Closing
Date,  notwithstanding  approval  of  the  Merger  by  the  Unitholders  of  the
applicable Partnership:
 
        (a) by  the mutual  written consent  of the  Board of  Directors of  the
    Company and the General Partner of the Partnership;
 
        (b)  by either the Company or the Partnership if the Merger has not been
    consummated by March 31, 1997;
 
        (c) by either  the Company or  the Partnership if  a court of  competent
    jurisdiction   or  governmental,  regulatory  or  administrative  agency  or
    commission shall have issued a nonappealable final order, decree or  ruling,
    or  taken any  other action  having the  effect of  permanently restraining,
    enjoining or otherwise prohibiting  the Merger between  the Company and  the
    Partnership;
 
        (d)  by either the Company  or the Partnership if  the requisite vote of
    the Unitholders of the Partnership shall have not been obtained by March 31,
    1997;
 
        (e) by  the  Company if  (i)  the  General Partner  of  the  Partnership
    withdraws  or changes its approval of  the Acquisition Agreement in a manner
    adverse to the Company or has resolved to do so; (ii) the General Partner of
    the  Partnership   recommends  to   the  Unitholders   certain   alternative
    transactions;  (iii) any person  (other than the Company  or an affiliate of
    the Company) will have  acquired voting rights to,  or the right to  acquire
    voting  rights to, or any group has  been formed which has voting rights to,
    or the right to  acquire voting rights  to, 20% or  more of the  outstanding
    Units  of such Partnership; or (iv) if  the Share Price, without taking into
    account the application of the Share Price Range, exceeds $28.50;
 
        (f) by  the Company  or the  Partnership if  (i) any  representation  or
    warranty  of the Partnership or the  Company, respectively, set forth in the
    Acquisition Agreement shall be materially  untrue when made or shall  become
    materially  untrue or (ii) upon a breach of any covenant or agreement on the
    part of  the Partnership  or the  Company, respectively,  set forth  in  the
    Acquisition  Agreement, such that certain conditions to the Merger would not
    be satisfied  (either  (i) or  (ii)  above being  a  "Terminating  Breach");
    provided, however, that if such Terminating Breach is curable prior to March
    31,  1997 by the Company or the Partnership, as the case may be, through the
    exercise of its reasonable best  efforts and for so  long as the Company  or
    the  Partnership, as the case may  be, continues to exercise such reasonable
    best efforts, neither  the Partnership  nor the  Company, respectively,  may
    terminate the Acquisition Agreement;
 
                                       50
<PAGE>
        (g)  by the Partnership or the Company, if the Partnership enters into a
    definitive agreement accepting an Alternative transaction; or
 
        (h) by the Partnership if the  Share Price, without taking into  account
    the  application  of the  Share Price  Range,  is less  than $21.50  and the
    Company has not agreed to pay the Additional Consideration.
 
FEES AND EXPENSES
 
    Substantial expenses have been  or will be incurred  by the Company and  the
Partnerships  in connection  with the  Offers and  the Mergers.  Those expenses,
excluding the Individual  Expenses (as  defined below),  will be  shared by  the
Company  and the Partnerships (the "Shared Expenses"). The "Individual Expenses"
include legal fees  and expenses, fees  and expenses of  investment bankers  and
other  financial advisors, the costs of the Appraisals and transfer fees payable
by the Company for  the Units acquired through  the Offers. Individual  Expenses
incurred  by the  Company will  be paid by  the Company  and Individual Expenses
incurred by a Partnership will be paid by the Partnership. The Company will  pay
50% of the Shared Expenses and 50% of the Shared Expenses will be allocated (the
"Allocated  Expenses") among the Partnerships pro rata based upon their relative
Net Asset Value (37.6%, 25.2% and  37.2% for IDS1, IDS2 and IDS3,  respectively)
and will be paid by the Partnership to which the expenses have been allocated if
the  Mergers are consummated. A  Partnership's Allocated Expenses and Individual
Expenses will be deducted from the assets of the Partnership when computing  the
Closing  Net Asset Value and an estimate  of such expenses was deducted from the
assets of  the  Partnerships  in  computing the  Net  Asset  Value.  Since  each
Partnership  will  be entitled  to make  a cash  distribution to  its pre-Merger
partners in an amount that will reduce the Closing Net Asset Value to an  amount
equal  to  the  Net  Asset  Value,  the  Partnership's  Allocated  Expenses  and
Individual Expenses will reduce the amount otherwise available for  distribution
to the pre-Merger partners in the Partnership.
 
    Except with respect to IDS1 as described below, in the event the Unitholders
in  the  Partnership  fail to  approve  the  Merger of  the  Partnership  by the
requisite vote, the  Partnership will  be required to  pay, in  addition to  its
Individual Expenses, only that percentage of its Allocated Expenses equal to the
percentage  of  its Units  voted  in favor  of the  Merger;  the balance  of the
Allocated Expenses will be paid by the Company.
 
    IDS2 and IDS3 will be obligated under the Acquisition Agreement to pay a pro
rata portion (based  upon that Partnership's  relative Net Asset  Value) of  the
Shared  Expenses and Individual Expenses otherwise payable by the Company if (i)
that Partnership has provided  information to or  entered into discussions  with
another  party regarding  the acquisition of  the Partnership, and  prior to the
date of the  Special Meeting  the General Partner  of the  Partnership does  not
reaffirm  its approval of  the Merger, and  the Unitholders fail  to approve the
Merger by  the  requisite vote,  (ii)  the Company  terminates  the  Acquisition
Agreement  because the General Partner of the Partnership withdraws its approval
of the Merger, recommends  an alternative transaction,  or third parties  obtain
voting  rights to 20% or more of the Units, or (iii) the Partnership enters into
an alternative transaction  and the  Partnership or the  Company terminates  the
Acquisition  Agreement. Because the provisions of the IDS1 Partnership Agreement
preclude IDS1 from  reimbursing the Company  for expenses if  the Merger is  not
consummated,  IDS1 will pay only  its Individual Expenses if  the IDS1 Merger is
not consummated for any reason.
 
                                       51
<PAGE>
    The following table sets forth the estimated aggregate expenses expected  to
be  incurred by the Company  and the Partnerships in  connection with the Offers
and the Mergers.
 
<TABLE>
<CAPTION>
Shared Expenses:
<S>                                                                              <C>
  Printing and mailing.........................................................  $  500,000
  Accounting fees..............................................................     255,000
  Real estate transaction costs................................................     165,000
  Information Agent/Inspector of Elections.....................................     425,000
  Other........................................................................     340,000
                                                                                 ----------
                                                                                  1,685,000
Individual Expenses:
  Legal fees...................................................................  $1,811,000
  Investment banking fees......................................................     955,000
  Partnership transfer fees for Tendered Units.................................     210,000
  Appraisal fee................................................................      92,000
                                                                                 ----------
                                                                                  3,068,000
                                                                                 ----------
Total Estimated Expenses.......................................................  $4,753,000
                                                                                 ----------
                                                                                 ----------
</TABLE>
 
    If all of the Mergers are consummated, (i) of the Shared Expenses, 50%  will
be paid by the Company and 18.8%, 12.6% and 18.6% will be paid by IDS1, IDS2 and
IDS3,   respectively,  and  (ii)  of   the  Individual  Expenses,  approximately
$1,410,000 will be paid by the Company and approximately $623,000, $418,000  and
$617,000 will be paid by IDS1, IDS2 and IDS3, respectively.
 
EFFECT OF TERMINATION
 
    If  the Acquisition Agreement  is terminated, there will  be no liability or
obligation on  the part  of  any party  thereto  or its  respective  affiliates,
partners, officers, directors or stockholders except (i) with respect to payment
of  expenses described above, (ii) with  respect to the Standstill Agreement and
(iii) to the extent that such termination  results from the willful breach of  a
party thereto of any of its representations, warranties, covenants or agreements
made in or pursuant to the Acquisition Agreement.
 
AMENDMENT
 
    Neither  the Acquisition Agreement nor any  provision thereof may be waived,
modified, amended,  discharged or  terminated except  in writing  signed by  the
party  against which the enforcement of such  waiver or amendment is sought, and
then only to the extent set forth in such instrument.
 
DISSENTERS' RIGHTS
 
    Units held  by Unitholders  who properly  exercise dissenters'  rights  with
respect  thereto  in  connection  with the  Merger  in  accordance  with Section
25.10.900 et seq. of the WULPA will  not be converted into the right to  receive
the  Merger Consideration, but the holder of  the Units will instead be entitled
to receive  payment of  the  fair value  of the  Units  in accordance  with  the
provisions  of the  WULPA unless and  until the  holder fails to  perfect or has
effectively withdrawn or lost his or her rights to receive fair value under  the
WULPA. See "Dissenters' Rights of Unitholders."
 
AMENDMENTS TO THE PARTNERSHIP AGREEMENTS
 
    The  IDS2 and IDS3 Partnership Agreements currently prohibit the sale of any
property by each  Partnership to its  General Partner or  "affiliates," as  such
term  is defined therein (including the Company). Accordingly, the IDS2 and IDS3
Partnership Agreements must be amended in order to consummate the IDS2 and  IDS3
Mergers.  The Acquisition Agreement provides that  the IDS2 and IDS3 Partnership
Agreements will be amended as described below.
 
                                       52
<PAGE>
    Section 13.3(c) of the IDS2 Partnership Agreement will be amended to add the
following subsection:
 
       (iii) Notwithstanding any  provision of this  Agreement, the  Partnership
    may  merge  with and  into Shurgard  Storage  Centers, Inc.  (the "Company")
    pursuant to,  and consummate  all other  transactions contemplated  by,  the
    terms  of the Acquisition Agreement dated July 1, 1996, between the Company,
    the Partnership,  IDS/Shurgard  Income  Growth  Partnership  L.P.  and  IDS/
    Shurgard Income Growth Partners L.P. III.
 
    Section 13.3(c) of the IDS3 Partnership Agreement will be amended to add the
following subsection:
 
       (iii)  Notwithstanding any  provision of this  Agreement, the Partnership
    may merge  with and  into  Shurgard Storage  Centers, Inc.  (the  "Company")
    pursuant  to,  and consummate  all other  transactions contemplated  by, the
    terms of the Acquisition Agreement dated July 1, 1996, between the  Company,
    the  Partnership,  IDS/Shurgard  Income  Growth  Partnership  L.P.  and IDS/
    Shurgard Income Growth Partners L.P. II.
 
    Approval of  the Acquisition  Agreement  and the  transactions  contemplated
thereby  by Unitholders of  IDS2 and IDS3  will also constitute  approval of the
amendments to the IDS2 and IDS3 Partnership Agreements, respectively, set  forth
above.  See "The Special Meetings -- The  IDS2 Special Meeting" and "-- The IDS3
Special Meeting."
 
GENERAL PARTNER UNDERTAKING
 
    Concurrent with  the execution  of the  Acquisition Agreement,  the  General
Partner  of each of the Partnerships entered  into an agreement with the Company
(the "General Partner Undertaking")  pursuant to which they  agreed to make  the
recommendations to Unitholders contained in this Proxy Statement/Prospectus, and
agreed  not  to  withdraw such  recommendations  except in  accordance  with the
discharge of  their fiduciary  duties  and as  otherwise  required by  law.  The
Company  acknowledged  that  the General  Partner  is entitled  to  withdraw its
recommendation in the event  that the Share Price  calculated without regard  to
the  Share Price Range is less than $21.50 and the Company does not elect to pay
the Additional Consideration.
 
                           SOURCE AND AMOUNT OF FUNDS
 
    The Company expects to pay its portion of the Shared Expenses and Individual
Expenses from borrowings  under the  Company's two  revolving credit  facilities
(the  "Credit  Facilities").  In  the  event  the  Company  pays  the Additional
Consideration, the  funds  required for  the  Additional Consideration  will  be
obtained through the Credit Facilities. Under the Credit Facilities, the Company
is authorized to borrow up to $100 million, on the terms and conditions provided
in  (i) the Loan  Agreement among the Company,  Seattle-First National Bank, Key
Bank of Washington  and West One  Bank dated  August 19, 1994  (the "First  Loan
Agreement")  and  (ii)  the  Revolving Loan  Agreement  among  the  Company, SSC
Acquisitions Inc. and Nomura Asset Capital  Corp. dated as of December 23,  1994
(the  "Second Loan  Agreement"). The  Mergers are  not subject  to any financing
contingency, and neither  the Company  nor any  subsidiary of  the Company  must
secure additional financing in connection with the Mergers.
 
    The  First  Loan Agreement  provides  for financing  of  up to  $50 million,
secured by certain real estate assets, bearing  interest at a rate per annum  of
either  the lender's prime  rate or LIBOR  plus 175 basis  points and matures on
August 18, 1996. As of the date of this Proxy Statement/Prospectus, the  Company
has  $    of borrowings outstanding  under the First Loan Agreement. The Company
is currently  engaged in  negotiations to  refinance its  obligations under  the
First  Loan Agreement. The  Second Loan Agreement provides  for financing of $50
million, secured by certain real estate  assets, bearing interest at a rate  per
annum  of either the prime rate of Citibank, N.A. minus 50 basis points or LIBOR
plus 175 basis  points, requires a  draw fee of  25 basis points  of the  amount
drawn,  and  matures  on  December  30,  1996. As  of  the  date  of  this Proxy
Statement/Prospectus, the Company has $     of
 
                                       53
<PAGE>
borrowings outstanding under  the Second  Loan Agreement.  The amount  available
under  each  of the  Credit Facilities  is  a function  of the  quarterly income
performance of the properties  securing the respective  Credit Facility and  the
quarterly debt service payments for that Credit Facility.
 
    The  amounts outstanding under the First  Loan Agreement and the Second Loan
Agreement include $     and $     , respectively, borrowed by the Company to pay
for Units purchased in the Offers.
 
                 APPRAISALS AND OPINIONS OF FINANCIAL ADVISORS
 
PORTFOLIO APPRAISALS OF THE PARTNERSHIPS' PROPERTIES
 
    Stanger was  engaged  by  the  Partnerships  to  appraise  the  real  estate
portfolio of each of the Partnerships and has delivered a written summary of its
analysis,  based  upon the  review,  analysis, scope  and  limitations described
therein, as  to the  fair market  value of  each Partnership's  portfolio as  of
December  31, 1995. The  Partnerships selected Stanger  to provide the appraisal
because of its  experience and  reputation in connection  with partnerships  and
real  estate assets. In addition, the General Partners desired to take advantage
of the  cost efficiencies  associated with  having the  same party  provide  the
Appraisals  as  provided the  Stanger Fairness  Opinions. The  Appraisals, which
contain a  description  of  the assumptions  and  qualifications  made,  matters
considered  and limitations on the review and analysis, are attached as Appendix
B to  this Proxy  Statement/Prospectus and  should be  read in  their  entirety.
Certain  of  the material  assumptions,  qualifications and  limitations  to the
Appraisals are described below.
 
    EXPERIENCE OF STANGER.   Since its  founding in 1978,  Stanger has  provided
information,  research, investment  banking and  consulting services  to clients
throughout the  United States,  including major  member firms  of the  NYSE  and
insurance  companies  and  over  70  companies  engaged  in  the  management and
operation of  partnerships and  real estate  investment trusts.  The  investment
banking  activities of  Stanger include  financial advisory  services, asset and
securities valuations, industry  and company research  and analysis,  litigation
support  and  expert  witness  services,  and  due  diligence  investigations in
connection  with  both  publicly  registered  and  privately  placed  securities
transactions.
 
    Stanger, as part of its investment banking business, is regularly engaged in
the  valuation of  businesses and their  securities in  connection with mergers,
acquisitions and  reorganizations  and  for estate,  tax,  corporate  and  other
purposes.   Stanger's  valuation  practice  principally  involves  partnerships,
partnership securities and the assets typically owned through partnerships, such
as oil and  gas reserves, real  estate, cable television  systems and  equipment
leasing assets.
 
    SUMMARY  OF  METHODOLOGY.    At the  request  of  the  Partnerships, Stanger
evaluated each of the Partnerships' portfolio of real estate on a limited  scope
basis  utilizing  the  income  approach and  the  sales  comparison  approach to
valuation. Appraisers  typically use  up  to three  approaches in  valuing  real
property:  (i) the cost approach,  (ii) the income approach  and (iii) the sales
comparison approach. The type and age  of a property, market conditions and  the
quantity  and quality  of data  affect the applicability  of each  approach in a
specific  appraisal  situation.  The  value  estimated  by  the  cost   approach
incorporates  separate estimates  of the  value of  the unimproved  site and the
value of improvements, less  observed physical wear and  tear and functional  or
economic  obsolescence. The income  approach estimates a  property's capacity to
produce income through an analysis of the rental market, operating expenses  and
net  income. Net income may then be processed into a value through either direct
capitalization or discounted cash flow analysis,  or a combination of these  two
methods.  The sales comparison  approach involves a  comparative analysis of the
subject property with other similar properties  that have sold recently or  that
are  currently  offered for  sale  in the  market.  Stanger considered  the cost
approach to be less  reliable than the income  approach or the sales  comparison
approach  given the  primary criteria  used by  buyers of  the type  of property
appraised in the Appraisals.
 
    While the Appraisals were prepared for each Partnership's entire real estate
portfolio, Stanger  analyzed  the  individual  properties  in  the  real  estate
portfolio of each Partnership by (i) reviewing each
 
                                       54
<PAGE>
property's  historical  operating  statements,  (ii)  reviewing  and  relying on
specific information regarding  prospective changes  in rents  and expenses  for
each  property provided by the Partnership,  (iii) developing information from a
variety of sources about market conditions for each individual property and (iv)
considering the  projected  cash  flow for  each  property.  Representatives  of
Stanger  performed site inspections on all properties in the Partnerships during
March 1996. In the course of  these site visits, Stanger inspected the  physical
facilities,   obtained  current  rental   and  occupancy  information,  gathered
information on  competing  properties  and the  local  market,  visited  primary
competing  properties and interviewed  each local property  manager or assistant
manager concerning performance of the subject property and other factors.
 
    In conducting  the  Appraisals, Stanger  also  interviewed and  relied  upon
Partnership  and property management personnel to obtain information relating to
the condition  of each  property, including  any deferred  maintenance,  capital
budgets,    status   of   ongoing   or   newly   planned   property   additions,
reconfigurations,  improvements  and  other   factors  affecting  the   physical
condition of the property improvements.
 
    Stanger  also interviewed district or regional property management personnel
responsible for the properties and  the Partnerships' management personnel,  all
of  whom are employees  of the Company, to  discuss competitive conditions, area
economic  and  development  trends  affecting  the  properties,  historical  and
budgeted  operating revenues and expenses and occupancies. Stanger also reviewed
historical operating  statements  and 1996  operating  budgets for  the  subject
properties, and reviewed surveys of local self-service storage markets conducted
by local management personnel.
 
    To  define the occupancy, rental  rate and expense escalators  to be used in
developing property  operating  projections, Stanger  reviewed  the  acquisition
criteria  and  projection parameters  in use  in the  marketplace by  major self
storage investors, owners  and operators.  In addition,  Stanger reviewed  other
published  information  concerning  acquisition  criteria  in  use  by  property
investors at or around December  31, 1995. Further, Stanger interviewed  various
sources in local markets to identify recent sales of self storage properties and
derive   certain  valuation   indicators.  Sources  for   data  concerning  such
transactions included local  appraisers, property owners,  real estate  brokers,
tax assessors and real estate research firms.
 
    INCOME  APPROACH.    Stanger  then  determined  the  value  of  each  of the
Partnerships' portfolios using  the income  approach. During the  course of  the
site  inspections, Stanger identified competing  properties and obtained data on
local market  rental  rates  and  occupancy.  Stanger  reviewed  historical  and
budgeted gross income and income from ancillary sources for each property in the
portfolios  and  conducted discussions  with  the property  management personnel
concerning property  and  market trends  and  competitive conditions  and  other
pertinent information. After assessing the above factors, Stanger estimated each
property's  effective gross income based  upon unit configuration, market rental
rates, market occupancy rates and  estimates of ancillary income. Expenses  were
estimated  based on historical and budgeted operating expenses, discussions with
management and certain industry expense guidelines. Estimated expenses were then
deducted from  income  to arrive  at  each property's  estimated  net  operating
income.  Expenses  relating solely  to  investor reporting  and  accounting were
excluded.
 
    Stanger then employed  both direct capitalization  and discounted cash  flow
analysis to define the overall value of the portfolio. The direct capitalization
rate  used  by Stanger  was  based on  current  acquisition criteria  among self
storage  investors  and   reflected  in  specific   sales  transactions.   Where
appropriate,  the  capitalization  rate  used  for  an  individual  property was
adjusted to reflect valuation  factors unique to the  property, such as  overall
quality,  recent buildouts  and other  unique valuation  factors. Where deferred
maintenance or extraordinary capital expenditures were required Stanger adjusted
the capitalized value accordingly. Stanger applied capitalization rates  ranging
from  9.25% to  10.25% to the  projected net  operating income from  each of the
Partnerships' properties which  were considered  to be  at stabilized  occupancy
during the 12 months ending December 31, 1996.
 
                                       55
<PAGE>
    In  applying discounted cash  flow analysis, projections  of cash flows from
each property (assuming no indebtedness thereon)  were developed for a ten  year
period  ending  December  31,  2005.  Income  and  expense  escalators  used  in
developing the projections were based on projection parameters currently in  use
by property investors, market factors, historical and budgeted financial results
for  each property and inflation rates.  Income escalators generally ranged from
3% to 3.5%. In highly competitive markets or where a property's operations  were
below  stabilized  levels, income  escalators  were adjusted  as  Stanger deemed
appropriate or  until stabilized  operations  were achieved.  Effective  expense
escalators generally ranged from 2.7% to 3.5%.
 
    Stanger  then  capitalized, at  terminal  capitalization rates  ranging from
10.0% to 10.50% for IDS1, 10.0% to  10.25% for IDS2 and 10.25% to 10.75%  (11.0%
for  the office property) for  IDS3, the estimated net  operating income of each
property for the 12 months ending December 31, 2006, to determine the property's
residual value. The  residual value was  discounted after deducting  appropriate
sales  expenses to a present  value using the same  discount rate applied to the
stream of annual cash flows. The discount rates utilized, ranging from 12.0%  to
12.5%  for IDS1,  12.0% to 12.25%  for IDS2 and  12.25% to 12.5%  for IDS3, were
based on current  acquisition criteria  among self  storage facility  investors,
commercial/industrial  property  investors'  target  rates  for  return  and the
historical spread in rates of return between real estate and other  investments.
Stanger   then  correlated  the  values   resulting  from  each  method  (direct
capitalization and discounted cash  flow) to arrive at  a final income  approach
valuation.
 
    SALES  COMPARISON  APPROACH.   Stanger  compiled transaction  data involving
properties similar  in  type to  the  Partnerships' properties  by  interviewing
sources   in  local  markets  to  identify  recent  sales  of  self  storage  or
office/storage  properties,   reviewing   publicly  available   information   on
acquisitions  of  self  storage properties,  reviewing  information  provided by
management, and contacting industry sources. Using this data, Stanger  performed
a  comparable sales analysis based upon price  per square foot. A probable range
of value  per  square  foot  was  estimated  for  each  property  based  on  the
relationship  between observed  sales prices per  square foot  and net operating
income per square foot. Price per square foot as estimated by this analysis  was
multiplied  by  the  rentable  square  footage of  each  property  to  derive an
estimated range  of value.  In the  case of  the IDS3  portfolio, the  valuation
included consideration of the value of excess land parcels held for resale.
 
    Stanger  reconciled the estimated values resulting from the sales comparison
approach and the  income approach for  each property, and  the resulting  values
were  summed  to  determine  the estimated  value  of  the  Partnerships' entire
portfolio. Stanger adjusted the value conclusion for joint venture interests and
excess land parcels  held for resale,  and to reflect  any deferred  maintenance
items  associated with  the properties.  The income  approach was  given primary
consideration  by  Stanger  because  properties  such  as  those  owned  by  the
Partnerships   are  typically  purchased  and   sold  based  upon  their  income
characteristics.  Stanger   gave  the   sales  comparison   approach   secondary
consideration.
 
    CONCLUSIONS  AS TO  VALUE.  Based  on the  valuation methodologies described
above, Stanger assigned a value to the portfolio of real property assets of each
Partnership. The following table sets forth the final portfolio value conclusion
of Stanger with respect to each of the Partnerships.
 
<TABLE>
<CAPTION>
                                                                PORTFOLIO VALUE
PARTNERSHIP                                                        CONCLUSION
- ----------------------------------------------------------  ------------------------
<S>                                                         <C>
IDS1......................................................      $     40,370,000
IDS2......................................................            30,520,000
IDS3......................................................            50,890,000
                                                            ------------------------
    Total.................................................      $    121,780,000
                                                            ------------------------
                                                            ------------------------
</TABLE>
 
    ASSUMPTIONS, LIMITATIONS AND QUALIFICATIONS OF PORTFOLIO
APPRAISALS.  Stanger  utilized certain  assumptions to  determine the  appraised
value  of  the portfolios  under the  income approach  and the  sales comparison
approach.  See  Appendix  B  for  a  discussion  of  the  specific  assumptions,
limitations and qualifications of the Appraisals.
 
                                       56
<PAGE>
    The  Appraisals reflect Stanger's valuation of the real estate portfolios of
the Partnerships as  of December  31, 1995, in  the context  of the  information
available  on such  date as  well as the  operating information  available as of
March 31, 1996. Events occurring after December 31, 1995, and before the closing
of the Mergers could affect the properties or assumptions used in preparing  the
real  estate  portfolio  appraisals. Stanger  has  no obligation  to  update the
Appraisals on the basis of subsequent  events. In connection with preparing  the
Appraisals,  Stanger was not  engaged to, and consequently  did not, prepare any
written report or compendium of its analysis for internal or external use beyond
the analysis set forth  in Appendix B. Stanger  will not deliver any  additional
written summary of the analysis.
 
    COMPENSATION  AND MATERIAL RELATIONSHIPS.   The Partnerships  paid Stanger a
fee of $92,000 to  prepare the Appraisals. In  addition, Stanger is entitled  to
reimbursement  for  reasonable  travel and  out-of-pocket  expenses  incurred in
making site  visits  and  preparing  the Appraisals  and  the  Stanger  Fairness
Opinion,  subject to  a maximum of  $35,000, and is  entitled to indemnification
against  certain  liabilities,  including  certain  liabilities  under   federal
securities  laws.  The  fees  for the  Appraisals  were  negotiated  between the
Partnerships and Stanger and payment thereof is not dependent upon completion of
the Mergers. As noted  in "-- Opinions of  the Partnerships' Financial  Advisor"
below,  certain predecessor  entities of the  Company engaged  Stanger to render
other  appraisals,  consulting  or  related   services  prior  to  the   present
engagement. Stanger also has been compensated for rendering the Stanger Fairness
Opinion. See "-- Opinion of the Partnerships' Financial Advisor."
 
OPINION OF THE PARTNERSHIPS' FINANCIAL ADVISOR
 
    Stanger was also engaged by the Partnerships to deliver a written summary of
its  determination as  to the  fairness of  the consideration,  from a financial
point of view, to be received by the Unitholders of each of the Partnerships  in
the  Mergers. The full  text of the  Stanger Fairness Opinion,  which contains a
description of the assumptions made,  matters considered and limitations on  the
review   and   analysis,   is   attached   as   Appendix   C   to   this   Proxy
Statement/Prospectus and should be read in its entirety. Certain of the material
assumptions and limitations to the Stanger Fairness Opinion are described below.
The summary set forth below does not purport to be a complete description of the
analyses used by Stanger in rendering the Stanger Fairness Opinion. Arriving  at
a  fairness opinion is a complex  analytical process not necessarily susceptible
to partial analysis or amenable to summary description.
 
    Except  for  certain  assumptions  described  more  fully  below  which  the
Partnerships   advised  Stanger  that  it  would  be  reasonable  to  make,  the
Partnerships imposed  no conditions  or limitations  on the  scope of  Stanger's
investigation  or the  methods and  procedures to  be followed  in rendering the
Stanger Fairness  Opinion. The  Partnerships have  agreed to  indemnify  Stanger
against  certain liabilities arising out of  Stanger's engagement to prepare and
deliver the Stanger Fairness Opinion.
 
    SUMMARY OF MATERIALS CONSIDERED
 
    In the course  of Stanger's  analysis to  render its  opinion regarding  the
Mergers, Stanger: (i) reviewed drafts of this Proxy Statement/Prospectus and the
Acquisition  Agreement in substantially  the forms intended  to be finalized and
filed with the  Commission; (ii)  reviewed the Partnerships'  and the  Company's
Annual  Reports on Form 10-K for the  fiscal years ended December 31, 1993, 1994
and 1995, and the Partnerships' and the Company's Quarterly Reports on Form 10-Q
for the quarter  ended March 31,  1996; (iii) reviewed  the Company's pro  forma
financial  statements  and pro  forma  schedules prepared  by  the Partnerships'
management and  the  Company's  management; (iv)  performed  appraisals  of  the
properties  owned  by the  Partnerships as  of December  31, 1995;  (v) reviewed
information regarding  purchases and  sales of  self storage  properties by  the
Company  or any affiliated entities during  the prior year and other information
available relating to  acquisition criteria  for self  storage properties;  (vi)
reviewed  internal financial analyses and forecasts prepared by the Partnerships
(based in part on the  Appraisals) of the current  net liquidation value of  the
Partnerships'   assets   and   projections  of   cash   flow   from  operations,
distributions, and going  concern values for  the Partnerships; (vii)  conducted
discussions    with   senior   management   of    the   Partnerships   and   the
 
                                       57
<PAGE>
Company regarding the conditions in self storage property markets, conditions in
the market for sales or acquisitions of properties similar to those owned by the
Partnerships,  current  and  projected  operations  and  performance,  financial
condition  and future prospects  of the properties  and the Partnerships; (viii)
reviewed historical market prices, trading  volume and dividends for the  Common
Stock   and  (ix)  conducted   such  other  studies,   analyses,  inquiries  and
investigations as Stanger deemed appropriate.
 
    SUMMARY OF ANALYSIS
 
    The following is  a summary  of certain financial  and comparative  analyses
reviewed  by Stanger in connection with and  in support of its fairness opinion.
The summary of  the opinion  and analysis  of Stanger  set forth  in this  Proxy
Statement/Prospectus  is qualified in its entirety by reference to the full text
of such opinion.
 
    APPRAISALS.    In  preparing  its  opinion,  Stanger  performed  independent
appraisals  of the Partnerships' portfolios of  properties. During the course of
the Appraisals, Stanger performed site inspections of each property owned by the
Partnerships, conducted inquiries  into local market  conditions affecting  each
property,  reviewed  historical  and  budgeted  operating  statements  for  each
property, conducted  interviews with  the Partnerships  and property  management
personnel,  reviewed the acquisition criteria in use in the marketplace by major
self storage  property investors  and owners  and other  real estate  investors,
reviewed  information concerning transactions involving self storage properties,
and estimated the market value of  the portfolio utilizing the income and  sales
comparison   approaches  to   value.  See   "--  Portfolio   Appraisals  of  the
Partnerships' Properties." Stanger observed that the Merger Consideration equals
the pro rata  interest per  Unit in  the Appraised  Values, as  adjusted by  the
General  Partners for non-real  estate assets and  liabilities of the applicable
Partnership, estimated Merger costs and costs  associated with the Offers to  be
borne  by the applicable Partnership and the Unitholders' share of the resulting
Net Asset  Value  according to  the  provisions of  the  applicable  Partnership
Agreement.
 
    REVIEW  OF LIQUIDATION ANALYSIS.   Stanger reviewed  an analysis prepared by
the respective  managements of  the Partnerships  of the  estimated  liquidation
values  of  each  of  the  Partnerships  utilizing  estimates  prepared  by  the
Partnerships of expenses associated  with such a  liquidation and the  appraised
fair market value of the properties as determined by the Appraisals.
 
    The  liquidation analysis assumed that  the properties in each Partnership's
portfolio were sold concurrently to an independent third party buyer at a  price
equal  to the appraised value of the  portfolio. Costs of such property sales to
independent  third  parties  were  estimated   by  the  Partnerships  to   total
approximately  4% of  real estate asset  value and are  comprised of transaction
costs, taxes, commissions and legal and  other closing costs. Such amounts  were
based  on prevailing transfer  tax rates in  the locale of  each property and on
estimates of the Partnerships based on their knowledge and experience in similar
real estate transactions.  The liquidation analysis  also assumed that  non-real
estate  assets and liabilities except amortizable assets were sold at book value
and that  net  proceeds were  distributed  among  the General  Partner  and  the
Unitholders  of the  applicable Partnership  in accordance  with its Partnership
Agreement.
 
    Stanger observed  that  the  Merger  Consideration  exceeded  the  estimated
liquidation  value per Unit  by approximately $4,  $5 and $9  for IDS1, IDS2 and
IDS3, respectively.
 
    REVIEW OF GOING CONCERN ANALYSIS.   Stanger reviewed financial analyses  and
projections  prepared by the managements of  each of the Partnerships concerning
estimated  cash  flows  and  distributions  from  continued  operation  of   the
Partnerships  as independent  stand-alone entities, and  estimated sale proceeds
from the liquidation of the portfolio of properties owned by the Partnerships in
2000. The  analyses  incorporated estimates  of  cash flow  from  operating  the
properties,  payments on existing debt,  entity level general and administrative
costs, and cash  distributions to Unitholders  from operations and  sale of  the
properties  owned by the Partnerships during  a five-year projection period. The
analyses and projections assumed,  among other things,  that (i) operating  cash
flow for the
 
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portfolios  would grow at a compound annual  rate of approximately 3.0% for IDS1
(after property  tax adjustments),  3.5% for  IDS2 and  4.0% for  IDS3 over  the
projection period; (ii) general and administrative expenses would increase at an
average  rate of 3.5% per annum over the projection period; (iii) the properties
would be sold in a single transaction at  the end of the projection period at  a
price  based on property cash  flows for 2001 capitalized at  a rate of 10.0% to
10.5%; (iv)  selling costs  equal to  4% of  real estate  asset value  would  be
incurred;  (v) cash flows were discounted at a  rate of 12.0% to 13.0% for IDS1,
12.25% to 13.25% for  IDS2 and 12.5%  to 13.5% for IDS3,  which rates take  into
consideration,  among other factors, differences in  the leverage levels of each
Partnership, and (vi) the net proceeds of the sale plus other remaining non-real
estate assets less liabilities of the Partnership would be distributed according
to the provisions of the Partnership Agreements.
 
    Stanger observed that the estimated going concern values resulting from  the
above  analyses ranged from  $251 to $235  per IDS1 Unit  compared with the IDS1
Offer Price of $257 per IDS1 Unit, $218 to $203 per IDS2 Unit compared with  the
IDS2  Offer Price of $222 per IDS2 Unit  and $304 to $283 per IDS3 Unit compared
with the IDS3 Offer Price of $308 per IDS3 Unit.
 
    REVIEW OF TENDER OFFER AND SECONDARY  MARKET PRICES.  Stanger observed  that
Units  of the  Partnerships have  been purchased  in recent  months both through
transactions on the  informal secondary  market for  partnership securities  and
through a tender offer.
 
    Stanger  observed  that Units  in  each of  the  Partnerships have  been the
subject of one  prior tender  offer. According  to information  provided by  the
Partnerships,  on February 28, 1996  Everest commenced a tender  offer for up to
4.9% of the IDS1  Units, IDS2 Units  and IDS3 Units.  Stanger observed that  the
prices  offered in this tender  offer were $110 per  IDS1 Unit compared with the
IDS1 Offer Price of  $257 per IDS1  Unit, $120 per IDS2  Unit compared with  the
IDS2  Offer Price of $222 per IDS2 Unit and $112 per IDS3 Unit compared with the
IDS3 Offer Price of $308  per IDS3 Unit. Stanger also  observed that on May  20,
1996  Public  Storage, Inc.  sold  1,824.5 IDS1  Units,  2,038.3 IDS2  Units and
1,602.5 IDS3 Units to the Company for $200 per IDS1 Unit, $180 per IDS2 Unit and
$190 per IDS3 Unit  (plus, in each case,  four days' accrued interest)  compared
with  the Offer Prices  of $257 per IDS1  Unit, $222 per IDS2  Unit and $308 per
IDS3 Unit.
 
    Stanger also observed that, based on  prices reported to Stanger by  various
firms  active in  the informal secondary  market for  partnership interests, the
highest selling prices reported for Units in the informal secondary market since
January 1, 1995 were $200  per IDS1 Unit compared with  the IDS1 Offer Price  of
$257  per IDS1 Unit,  $186 per IDS2 Unit  compared with the  IDS2 Offer Price of
$222 per IDS2 Unit and $200 per IDS3 Unit compared with the IDS3 Offer Price  of
$308 per IDS3 Unit.
 
    CONCLUSIONS
 
    Stanger  concluded that, based  upon the foregoing and  its analysis and the
assumptions, qualifications, and limitations stated below, and as of the date of
the Stanger Fairness  Opinion, the Merger  Consideration to be  received by  the
Unitholders  in  the  Mergers is  fair  to  the Unitholders  of  each respective
Partnership from a financial point of view.
 
    ASSUMPTIONS
 
    In  rendering  the  Stanger   Fairness  Opinion,  Stanger  relied,   without
independent  verification, on the accuracy and completeness of all financial and
other information  contained  in  the Proxy  Statement/Prospectus  or  that  was
otherwise  publicly available or furnished or otherwise communicated to Stanger.
Stanger  has  not   made  an   independent  evaluation  or   appraisal  of   the
determinations   of  the   non-real  estate   assets  and   liabilities  of  the
Partnerships. Stanger relied upon the balance sheet value determinations for the
Partnerships and the adjustments made by the General Partners to the real estate
portfolio appraisals to arrive at the Net Asset Values. Stanger also relied upon
the assurance of the Company, the Partnerships and the General Partners that the
calculations made  to  determine allocations  within  each of  the  Partnerships
between  the General Partner and Unitholders  are consistent with the provisions
of each  Partnership's Partnership  Agreement, that  any financial  projections,
 
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pro  forma  statements,  projections, budgets,  value  estimates  or adjustments
provided to Stanger  were reasonably  prepared or adjusted  on bases  consistent
with  actual  historical experience  and  reflect the  best  currently available
estimates and good faith  judgments, that no material  changes have occurred  in
the  Partnership's values subsequent  to March 31,  1996, or in  the real estate
portfolio values subsequent to December 31, 1995, which are not reflected in the
Partnership's Net Asset Values herein, and that the Partnerships and the General
Partners are not aware  of any information or  facts regarding the  Partnerships
that  would  cause  the information  supplied  to  Stanger to  be  incomplete or
misleading.
 
    LIMITATIONS AND QUALIFICATIONS OF FAIRNESS OPINION
 
    Stanger was not asked  to and therefore  did not: (i)  select the method  of
determining   the  consideration   offered  in   the  Mergers;   (ii)  make  any
recommendations to the Unitholders with respect to whether to approve or  reject
the  Mergers or whether to  select the Offers made by  the Company or the Shares
offered in the  Mergers; (iii) express  any opinion  as to the  fairness of  the
Merger  Consideration to be received in the Mergers if the actual Share Price is
less than $22.25  or (iv) express  any opinion  as to the  business decision  to
effect  the Mergers, alternatives to the Mergers, tax factors resulting from the
Mergers, the  allocation of  expenses relating  to the  Mergers and  the  Offers
between the Company and the Partnerships or among the Partnerships, or any other
terms  of the Mergers other than  the Merger Consideration. The Stanger Fairness
Opinion is based on business, economic, real estate and securities markets,  and
other  conditions as of July 1, 1996, and  does not reflect any changes in those
conditions that may have occurred since that date.
 
    In connection with preparing the  Stanger Fairness Opinion, Stanger was  not
engaged  to, and consequently did not,  prepare any written report or compendium
of its analysis for internal  or external use beyond  the analysis set forth  in
Appendix  C.  Stanger will  not deliver  any additional  written summary  of the
analysis.
 
    COMPENSATION AND MATERIAL RELATIONSHIPS
 
    Stanger has been paid fees by the Partnerships of $375,000 for preparing the
Stanger Fairness  Opinion relating  to the  Mergers and  $105,000 for  preparing
fairness  opinions relating to  the Offers. In addition,  in connection with its
preparation of the Appraisals and the fairness opinions relating to the  Mergers
and  the Offers,  Stanger will  be reimbursed  for all  reasonable out-of-pocket
expenses, including  legal fees,  up to  a maximum  of $35,000  and  indemnified
against  certain liabilities,  including certain  liabilities under  the federal
securities laws. The fee  was negotiated between  the Partnerships and  Stanger.
Payment  of the fee to Stanger is  not dependent upon completion of the Mergers.
The Company retained  Stanger to perform  appraisals and to  deliver a  fairness
opinion  and special reports in connection with the Consolidation in March 1994.
Stanger was  paid  approximately  $1,025,000  and  was  reimbursed  for  certain
expenses  in connection  with such services.  In addition, the  Company has paid
certain  nominal  amounts  to  Stanger  for  subscriptions  to  Stanger-prepared
national  publications.  Stanger also  has  been compensated  for  preparing the
Appraisals. See "-- Portfolio Appraisals of the Partnerships' Properties."
 
OPINION OF THE COMPANY'S FINANCIAL ADVISOR
 
    In March 1996, the Company retained Alex. Brown to act as financial  advisor
to  the  Special  Committee  in  connection with  the  Offers  and  the Mergers,
including rendering its opinion to the Board  of Directors of the Company as  to
the   fairness  to  the  Company,  from  a  financial  point  of  view,  of  the
consideration  payable  to   the  Unitholders  and   General  Partners  of   the
Partnerships.  The  Company  and  Alex.  Brown  subsequently  executed  a formal
engagement letter on June 20, 1996.
 
    At the July  1, 1996 meeting  of the Special  Committee, representatives  of
Alex.  Brown rendered to the Board of Directors of the Company its opinion that,
as of that  date, and subject  to the assumptions  made, matters considered  and
limitations   set   forth   in   such   opinion   and   summarized   below,  the
 
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consideration payable by  the Company in  the Offers and  the Mergers was  fair,
from  a financial point of view, to  the Company. No limitations were imposed by
the Special Committee upon Alex. Brown  with respect to the investigations  made
or procedures followed by it in rendering its opinion.
 
    THE  FULL TEXT  OF ALEX.  BROWN'S WRITTEN  OPINION DATED  JULY 1,  1996 (THE
"ALEX. BROWN OPINION"), WHICH SETS FORTH, AMONG OTHER THINGS, ASSUMPTIONS  MADE,
MATTERS  CONSIDERED AND  LIMITATIONS ON  THE REVIEW  UNDERTAKEN, IS  ATTACHED AS
APPENDIX D  TO THIS  PROXY STATEMENT/PROSPECTUS  AND IS  INCORPORATED HEREIN  BY
REFERENCE. THE ALEX. BROWN OPINION ADDRESSES ONLY THE FAIRNESS TO THE COMPANY OF
THE  CONSIDERATION PAYABLE  BY THE  COMPANY IN THE  OFFERS AND  THE MERGERS. THE
ALEX. BROWN OPINION DOES NOT ADDRESS THE FAIRNESS OF THE OFFERS AND THE  MERGERS
TO  THE UNITHOLDERS OR  GENERAL PARTNERS OF THE  PARTNERSHIPS. THE DISCUSSION OF
THE ALEX. BROWN OPINION IN THIS  PROXY STATEMENT/PROSPECTUS IS QUALIFIED IN  ITS
ENTIRETY BY REFERENCE TO THE FULL TEXT OF THE ALEX. BROWN OPINION.
 
    In  connection with rendering the Alex.  Brown Opinion, Alex. Brown reviewed
certain publicly available financial  information and certain internal  analyses
and  other information concerning the Company  and the Partnerships furnished to
it by the Company.  Alex. Brown also  held discussions with  the members of  the
senior  management of the Company regarding  the businesses and prospects of the
Company and the Partnerships  and the joint prospects  of a combined entity.  In
addition,  Alex. Brown (i) reviewed the reported prices and trading activity for
Shares and  the  Units  of  each of  the  Partnerships,  (ii)  compared  certain
financial  and stock market information for the Company with similar information
for certain comparable  companies whose  securities are  publicly traded,  (iii)
reviewed  the financial terms of certain  recent real estate transactions deemed
comparable in  whole or  in part,  (iv) reviewed  the terms  of the  Acquisition
Agreement and certain related documents and (v) performed such other studies and
analyses and considered such other factors as it deemed appropriate.
 
    In  conducting its  review and  arriving at  the Alex.  Brown Opinion, Alex.
Brown assumed and relied upon,  without independent verification, the  accuracy,
completeness  and fairness of the information furnished to or otherwise reviewed
by or  discussed with  it. With  respect  to the  financial projections  of  the
Partnerships  and the Company and other information relating to the prospects of
the Partnerships and the Company provided  to Alex. Brown by each entity,  Alex.
Brown  assumed  that  such  projections and  other  information  were reasonably
prepared and reflected the best  currently available judgments and estimates  of
the  respective managements of the Partnerships and the Company as to the likely
future financial performances of their  respective entities and of the  combined
entity.  Alex. Brown expressed no view as to such projections or the assumptions
on which they were based. Alex. Brown did not make an independent evaluation  or
appraisal  of the assets of the  Partnerships. However, Alex. Brown reviewed the
Appraisals with respect to the real estate assets, although it was not permitted
to rely upon the Appraisals for purposes of the Alex. Brown Opinion. Alex. Brown
assumed that the Appraisals were prepared on a reasonable basis. The Alex. Brown
Opinion is based on  market, economic and other  conditions as they existed  and
could be evaluated as of the date thereof.
 
    The  following is a summary of  the material analyses performed and material
factors considered by Alex. Brown in  connection with rendering the Alex.  Brown
Opinion.
 
    HISTORICAL  FINANCIAL  POSITION.    Alex. Brown  reviewed  and  analyzed for
informational purposes the  historical and  current financial  condition of  the
Company  and the Partnerships which included: (i) an assessment of the Company's
and the  Partnerships' recent  financial  statements; (ii)  an analysis  of  the
Company's  and  the  Partnerships'  revenue,  growth  and  operating performance
trends; and (iii) an assessment of the Partnerships' leverage, market share  and
access to markets.
 
    HISTORICAL  STOCK PRICE PERFORMANCE.  Alex.  Brown reviewed and analyzed the
daily closing per share market prices, trading volume, and 20 day moving average
stock price for  the Common Stock,  from June 25,  1995 to June  25, 1996.  This
information  was  presented to  give  the Special  Committee  background trading
information over the period  indicated. Alex. Brown  also reviewed and  analyzed
information  regarding the market prices and trading volume of the Partnerships'
units, on a quarterly basis, from September 1995 to April 1996.
 
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<PAGE>
    ANALYSIS OF CERTAIN OTHER PUBLICLY TRADED COMPANIES.  This analysis examines
a company's valuation in the public market  as compared to the valuation in  the
public  market of other  selected publicly traded  companies, in each  case as a
multiple of  its  funds  from  operations, defined  as  per  share  net  income,
excluding  extraordinary  gains or  losses, plus  depreciation from  real estate
assets ("Funds  From Operations"),  estimated  for 1996  and 1997.  Alex.  Brown
compared   certain  financial  information  relating  to  the  Company  and  the
Partnerships to certain  corresponding information  with respect to  a group  of
four  publicly traded REITs engaged primarily  in the acquisition, operation and
management of storage center properties, namely the following companies: Storage
USA, Inc., Storage Trust Realty, Sovran Self Storage, Inc. and PS (collectively,
the "Selected  Companies"). Such  financial  information included,  among  other
things,  (i) common equity market prices, (ii) per share estimated 1996 and 1997
Funds From Operations and (iii) ratios of common equity market prices per  share
("Equity  Values")  to  estimated Funds  From  Operations.  In the  case  of the
Selected Companies  the  financial information  used  was based  on  the  latest
reported  quarterly period as derived from publicly available information and on
estimated Funds from Operations for calendar years 1996 and 1997 as reported  by
REALTY  STOCK  REVIEW. Alex.  Brown obtained  reference  ranges of  multiples of
Equity Value to estimated  calendar year 1996 Funds  From Operations of 9.9x  to
12.5x,  with a mean of  11.0x, and Equity Value  to estimated calendar year 1997
Funds From Operations of 8.8x to 11.3x, with  a mean of 10.1x, in each case  for
the Selected Companies. Applying such reference multiple ranges to the estimated
calendar  year 1996 and 1997 Funds From Operations for each of the Partnerships,
Alex. Brown determined reference  valuation ranges from  the Partnerships (on  a
combined  basis) of  $105.3 million  to $132.0  million, with  a mean  of $116.6
million, based  upon estimated  calendar year  1996 Funds  From Operations,  and
$108.8  million to  $136.3 million,  with a mean  of $120.4  million, based upon
estimated calendar year 1997 Funds From Operations. As a result of the foregoing
procedures, Alex. Brown  noted that  the consideration  of approximately  $106.6
million in the aggregate to be paid by the Company in the Offers and the Mergers
was  at the  lower end  of, or  below, the  ranges of  the values  obtained with
respect to the Selected Companies.
 
    ANALYSIS OF SELECTED  REAL ESTATE  ACQUISITIONS.  Alex.  Brown reviewed  the
financial  terms, to the  extent publicly available, of  15 proposed, pending or
completed real estate transactions in the storage center industry (the "Selected
Transactions"), and calculated  for each  of the Selected  Transactions and  the
Offers  and the Mergers the capitalization rate, defined as net operating income
(minus capital expenditures) divided by  the purchase price for the  properties.
The  Selected Transactions  consisted of (i)  the Company's bid  to acquire four
National  Self  Storage  properties,  (ii)  the  Company's  September  1,   1994
acquisition  of Colonial  Self-Storage, (iii)  Storage USA  Inc.'s September 12,
1995 acquisition of 13 storage center properties, (iv) Storage USA, Inc.'s April
13, 1995 acquisition of  25 storage center properties,  (v) Storage USA,  Inc.'s
April  13, 1995 acquisition of 16  storage center properties, (vi) Storage Trust
Realty's acquisition of Balcor/Colonial Storage Income Fund -- 86, (vii) Storage
Trust Realty's  October 6,  1995 acquisition  of 14  storage center  properties,
(viii)  Sovran  Self Storage,  Inc.'s June  30, 1995  acquisition of  12 storage
center properties,  (ix) U-Haul  International, Inc.'s  bid for  Balcor/Colonial
Storage  Income Fund --  86, (x) PS's  June 14, 1996  acquisition of Prudential-
Bache/Watson  &  Taylor,  Ltd.-1,  (xi)  PS's  June  14,  1996  acquisition   of
Prudential-Bache/Watson  & Taylor, Ltd.-2, (xii)  PS's June 14, 1996 acquisition
of  Prudential-Bache/Watson  &  Taylor,  Ltd.-3,  (xiii)  PS's  June  14,   1996
acquisition  of  Prudential-Bache/Watson &  Taylor,  Ltd.-4, (xiv)  PS's pending
acquisition of  Storage  Properties,  Inc.  and  (xv)  PS's  February  29,  1996
acquisition  of Southern Self Storage. Alex. Brown noted that the capitalization
rate based  on  the last  reported  annual net  operating  income prior  to  the
transaction  (year ended December 31, 1995 in  the case of the Partnerships) was
8.7% for the Partnerships (on a combined  basis), which was at the lower end  of
the  range of 8.5%  to 10.3%, with a  mean of 9.4%,  determined for the Selected
Transactions. Alex. Brown also noted that  the capitalization rate based on  the
projected  net operating income for the year in which the acquisition took place
was 9.6% for the Partnerships  (on a combined basis),  falling in the middle  of
the  range of  9.0% to 10.5%,  with a mean  of 9.7% determined  for the Selected
Transactions. All multiples for the
 
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Selected Transactions were based on public information available at the time  of
announcement  of such transaction, without  taking into account differing market
and other  conditions during  the  two year  period  during which  the  Selected
Transactions occurred.
 
    DISCOUNTED  CASH FLOW ANALYSIS.   Alex. Brown  obtained reference values for
each of the  Partnerships by  means of a  discounted cash  flow analysis,  which
values  a business based on the current value of the future cash flow that it is
projected to generate. To establish a current value under this approach,  future
cash  flow must be estimated and  an appropriate discount rate determined. Alex.
Brown used projections and other information provided by the managements of  the
Partnerships  to  estimate  free cash  flows,  defined as  total  revenues minus
property operating and maintenance expenses, property management expenses,  real
estate  taxes and capital expenditures ("Free  Cash Flows"), for the years ended
1996 through 2006, inclusive,  with respect to the  assets of the  Partnerships,
using   discount  rates  ranging   from  11.0%  to   13.0%  and  terminal  value
capitalization rates applied to projected 2006 Free Cash Flow ranging from  9.0%
to  11.5%. Alex. Brown arrived  at such discount rates  based on its judgment of
the weighted average cost of capital of the Company and arrived at such terminal
values based on its review of the Selected Transactions. This analysis indicated
a range  of  values  for  the  Partnerships'  real  estate  of  $106,459,161  to
$133,081,669  on a Free Cash Flow basis, as compared to the imputed value of the
Partnerships' real estate of $121,780,000 under the terms of the Offers and  the
Mergers.
 
    Alex.   Brown  also  applied   a  discounted  cash   flow  analysis  to  the
Partnerships'  projected  Funds  From   Operations,  and  funds  available   for
distribution, defined as Funds From Operations less capital expenditures, tenant
improvements   and  commissions  ("Funds  Available  for  Distribution"),  using
discount rates ranging  from 11.0%  to 13.0% and  terminal value  capitalization
rates  applied to Funds From Operations and Funds Available for Distribution, as
the case may be, projected for the year 2006, ranging from 9.0% to 11.5%.  Alex.
Brown  noted that this analysis indicated a range of values for the Partnerships
of $102,002,516 to $127,549,435 based  upon estimated Funds From Operations  and
$98,397,791   to  $123,189,094   based  upon   estimated  Funds   Available  for
Distribution. Based upon  the Appraisals and  certain balance sheet  adjustments
provided  by management, the  Partnerships' indicated Net  Asset Value, which is
also nominally the  amount of consideration  to be  paid by the  Company in  the
Offers  and the Mergers,  is $106,578,185, which  falls at the  lower end of the
reference ranges of imputed values derived from the analysis.
 
    PRO FORMA COMBINED EARNINGS ANALYSIS.   Alex. Brown analyzed the Offers  and
the  Mergers with respect  to the resulting  dilution/accretion to the Company's
estimated Funds From  Operations for the  years ending 1996  and 1997  (assuming
different  levels of  cash and stock  comprising the  consideration paid), after
taking into  account any  potential cost  savings and  other synergies  but  not
taking  into account nonrecurring costs relating  to the Offers and the Mergers.
Alex. Brown noted  that after  taking into  account potential  cost savings  and
other  synergies for  the years ending  1996 and 1997,  respectively, and before
nonrecurring costs  relating  thereto,  the  Offers and  the  Mergers  would  be
slightly  accretive to  the Company's estimated  Funds From  Operations for such
years.
 
    REAL ESTATE MARKET AND  ECONOMIC FACTORS.  In  rendering its opinion,  Alex.
Brown  considered, among other factors, the condition of the U.S. stock markets,
particularly in  the real  estate  sector, and  the  current level  of  economic
activity.
 
    ANALYSIS  OF  OFFERS  ABSENT  CONSUMMATION OF  MERGERS.    Alex.  Brown also
examined the financial effects to the Company of consummating one or more of the
Offers without also consummating the  related Merger. Alex. Brown observed  that
while  a failure  to consummate  the Merger  would result  in the  assets of the
relevant Partnership not being owned entirely by the Company and certain of  the
anticipated  combination synergies not  being realized by  the Company, the cash
purchase price offered  by the  Company in each  of the  Offers generally  would
result  in accretion to the  Company's estimated Funds From  Operations on a per
Unit basis, excluding  nonrecurring transaction  costs, regardless  of how  many
Units were actually purchased.
 
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    No  company used in the analysis of  other publicly traded companies nor any
transaction used in the analysis of selected mergers and acquisitions summarized
above is identical to the Company, the Partnerships or any of the Offers and the
Mergers. Accordingly, such analyses  must take into  account differences in  the
financial  and  operating  characteristics  of the  Selected  Companies  and the
companies in the Selected Transactions and  other factors that would affect  the
public  trading value  and acquisition value  of the Selected  Companies and the
Selected Transactions, respectively.
 
    While the foregoing summary  describes all analyses  and factors that  Alex.
Brown  deemed  material  in rendering  the  Alex.  Brown Opinion,  it  is  not a
comprehensive description of all analyses and factors considered by Alex. Brown.
The preparation of a fairness opinion is a complex process that involves various
determinations as  to the  most  appropriate and  relevant method  of  financial
analysis  and the application  of these methods  to the particular circumstances
and, therefore,  the  process  of  preparing such  an  opinion  is  not  readily
susceptible  to summary description. Alex. Brown believes that its analyses must
be considered as a whole and that selecting portions of its analyses and of  the
factors  considered  by it,  without considering  all  analyses and  the factors
considered by it,  could create  an incomplete  view of  the evaluation  process
underlying  the Alex. Brown  Opinion. The analyses performed  by Alex. Brown are
not necessarily indicative  of actual  values or  future results,  which may  be
significantly  more or  less favorable  than those  suggested by  such analyses.
Accordingly, such analyses and estimates  are inherently subject to  substantial
uncertainty.  Additionally, analyses relating to the  value of a business do not
purport to be appraisals or to reflect the prices at which the business actually
may be sold.  Furthermore, no opinion  is being  expressed as to  the prices  at
which Shares may trade at any future time.
 
    Pursuant  to a letter agreement dated June  20, 1996 between the Company and
Alex. Brown,  the fees  payable to  Alex. Brown  for rendering  the Alex.  Brown
Opinion  are $400,000.  In addition, the  Company has agreed  to reimburse Alex.
Brown for  its reasonable  out-of-pocket expenses  incurred in  connection  with
rendering  financial advisory services, including  fees and disbursements of its
legal counsel.  The  Company  has  agreed  to  indemnify  Alex.  Brown  and  its
directors,  officers,  agents,  employees and  controlling  persons  for certain
costs, expenses, losses, claims, damages  and liabilities related to or  arising
out of its rendering of services under its engagement as financial advisor.
 
    The  Special Committee retained Alex. Brown to act as its advisor based upon
Alex. Brown having acted  as managing underwriter of  a past offering of  Common
Stock  and as financial advisor to a special committee of the Board of Directors
of the Company regarding  its merger with Shurgard  Incorporated and based  upon
Alex.  Brown's qualifications, reputation, experience and expertise. Alex. Brown
is an internationally  recognized investment  banking firm and,  as a  customary
part  of  its  investment  banking  business, is  engaged  in  the  valuation of
businesses and their  securities in  connection with  mergers and  acquisitions,
negotiated underwritings, private placements and for other purposes. Alex. Brown
may  actively trade the equity securities of the Company for its own account and
for the account of its customers and,  accordingly, may at any time hold a  long
or  short position  in such  securities. Alex. Brown  maintains a  market in the
Common Stock  and  regularly  publishes  research  reports  regarding  the  REIT
industry  and the  businesses and securities  of the Company  and other publicly
traded companies in the REIT industry.
 
                                       64
<PAGE>
                  PRO FORMA CONSOLIDATED FINANCIAL STATEMENTS
    The following unaudited pro forma consolidated balance sheet as of March 31,
1996 and  unaudited pro  forma  consolidated statement  of  net income  for  the
three-month period then ended and the year ended December 31, 1995 set forth the
effect  of the Mergers on  the Company's pre-Merger pro  forma balance sheet and
pre-Merger pro forma statements of income as of and for the same dates as if the
Offers were completed and the Mergers had occurred on January 1, 1995.
 
    The  Company's  pre-Merger   pro  forma  consolidated   balance  sheet   and
consolidated  statements of  net income  are based  on the  Company's historical
financial statements  adjusted  to reflect  the  consummation of  the  following
transactions  as if  they had  occurred on January  1, 1995:  (i) the Management
Company Merger in March 1995, (ii) the acquisition of Shurgard Evergreen Limited
Partnership in May 1995, (iii) the  sale of approximately 4.9 million shares  of
Common Stock in June and July 1995, (iv) the acquisition of four storage centers
completed  in 1995  and (v)  the purchase  of 29,640,  23,022 and  23,843 of the
outstanding Units of IDS1, IDS2 and IDS3, respectively, pursuant to the  Offers.
The  1995 pre-Merger pro forma consolidated statement of net income assumes that
any  additional  net  income  resulting  from  the  preceding  assumptions   was
distributed to stockholders during 1995.
 
    These  pro forma  consolidated financial  statements have  been formatted to
show  the  pro  forma  adjustments   to  the  Company's  pre-Merger  pro   forma
consolidated  financial statements related to the Partnerships in three separate
columns so that the Unitholder  can determine the results  of the Merger of  any
one, two or three of the Partnerships with the Company.
 
    The   pro  forma  consolidated  financial  statements  are  not  necessarily
indicative of  what  the  Company's  actual financial  position  or  results  of
operations  would have been as of the date  or for the periods indicated, nor do
they purport  to  represent  the  Company's financial  position  or  results  of
operations  as of or for any future period. The pro forma consolidated financial
statements should be read in conjunction with all financial statements  included
elsewhere    herein    or   incorporated    by    reference   in    this   Proxy
Statement/Prospectus.
 
                                       65
<PAGE>
                      PRO FORMA CONSOLIDATED BALANCE SHEET
                                 MARCH 31, 1996
 
<TABLE>
<CAPTION>
                                               COMPANY                                              COMPANY
                                              PRE-MERGER    IDS1 (1)     IDS2 (1)     IDS3 (1)    POST-MERGER
(IN THOUSANDS)                                PRO FORMA    ADJUSTMENTS  ADJUSTMENTS  ADJUSTMENTS   PRO FORMA
                                             ------------  -----------  -----------  -----------  -----------
<S>                                          <C>           <C>          <C>          <C>          <C>
Storage centers, net.......................   $  537,732    $  42,476(2)  $  30,520(2)  $  50,688(2)  $ 661,416
Other real estate investments..............       42,223       (9,810)(3)     (5,104)(4)     (7,136)(4)     20,173
Cash, cash equivalents and other assets....       60,327        1,088(5)        562(5)        754(5)     62,731
                                             ------------  -----------  -----------  -----------  -----------
    Total assets...........................   $  640,282    $  33,754    $  25,978    $  44,306    $ 744,320
                                             ------------  -----------  -----------  -----------  -----------
                                             ------------  -----------  -----------  -----------  -----------
Accounts payable and other liabilities.....   $   43,854    $   1,300(6)  $   1,371(6)  $   2,779(  (7)  $  49,304
Notes payable..............................      154,601           --        2,850       10,384      167,835
                                             ------------  -----------  -----------  -----------  -----------
    Total liabilities......................      198,455        1,300        4,221       13,163      217,139
                                             ------------  -----------  -----------  -----------  -----------
Stockholders' equity.......................      441,827       32,454(8)     21,757(8)     31,143(8)    527,181
                                             ------------  -----------  -----------  -----------  -----------
    Total liabilities and stockholders'
     equity................................   $  640,282    $  33,754    $  25,978    $  44,306    $ 744,320
                                             ------------  -----------  -----------  -----------  -----------
                                             ------------  -----------  -----------  -----------  -----------
</TABLE>
 
- ------------------------------
(1) Amount represents the historical balances of the Partnership.
 
(2)  Amounts  reflect  market  value  of  self  storage  centers  based  on  the
    Appraisals.  IDS1 includes only  70% of the  step-up to market  value of SJP
    II's storage centers as the remaining 30% was owned by the Company prior  to
    the  Mergers and  will continue  to be  carried at  the Company's historical
    cost.
 
(3)  Historical  amounts  have  been  adjusted  to  reflect  the  Units  of  the
    Partnerships purchased by the Company ("Tendered Units") as if such purchase
    had occurred on January 1, 1995 and the Company's 30% interest in SJP II.
 
(4)  Historical  amounts  have been  adjusted  to  reflect the  purchase  of the
    Tendered Units.
 
(5) Historical assets have  been reduced to  eliminate amortizable assets  which
    were  specifically excluded from the calculation  of Net Asset Value per the
    Acquisition Agreement.
 
(6) Historical amounts have been  adjusted to include estimated liabilities  for
    Partnership  transaction costs of $939,800,  $630,100 and $930,100 for IDS1,
    IDS2 and  IDS3, respectively.  See "The  Acquisition Agreement  -- Fees  and
    Expenses."
 
(7)  Historical amount has been adjusted  to include $257,000 of estimated costs
    to complete the  expansion of Dobson  Ranch, the market  value of which  was
    included in the Appraisal.
 
(8)  Amount reflects Net Asset Value less the purchase price paid by the Company
    for the Tendered Units.
 
                                       66
<PAGE>
                 PRO FORMA CONSOLIDATED STATEMENT OF NET INCOME
                       THREE MONTHS ENDED MARCH 31, 1996
 
<TABLE>
<CAPTION>
                                                COMPANY                                              COMPANY
(IN THOUSANDS, EXCEPT PER SHARE AND SHARE      PRE-MERGER    IDS1 (1)     IDS2 (1)     IDS3 (1)    POST-MERGER
DATA)                                          PRO FORMA    ADJUSTMENTS  ADJUSTMENTS  ADJUSTMENTS   PRO FORMA
                                              ------------  -----------  -----------  -----------  -----------
<S>                                           <C>           <C>          <C>          <C>          <C>
Rental revenue..............................   $   23,531    $   1,622    $   1,093    $   1,807   $    28,053
Revenue from other real estate
 investments................................          721         (186)(2)        (66)(3)       (101)(3)         368
Property management revenue.................          854         (109)(4)        (75)(4)       (119)(4)         551
                                              ------------  -----------  -----------  -----------  -----------
    Total revenue...........................       25,106        1,327          952        1,587        28,972
                                              ------------  -----------  -----------  -----------  -----------
Operating expense...........................        6,926          403          255          468         8,052
Depreciation and amortization...............        5,106          333(5)        216(5)        350(5)       6,005
Real estate taxes...........................        2,081          127           90          135         2,433
General and administrative..................        1,082           34(4)         29(4)         28(4)       1,173
                                              ------------  -----------  -----------  -----------  -----------
    Total expenses..........................       15,195          897          590          981        17,663
                                              ------------  -----------  -----------  -----------  -----------
Income from operations......................        9,911          430          362          606        11,309
                                              ------------  -----------  -----------  -----------  -----------
Interest and other income...................           95           10            5            9           119
Interest expense............................       (2,888)          --          (59)(6)       (214)(6)      (3,161)
                                              ------------  -----------  -----------  -----------  -----------
    Total other income (expense)............       (2,793)          10          (54)        (205)       (3,042)
                                              ------------  -----------  -----------  -----------  -----------
Net income..................................   $    7,118    $     440    $     308    $     401   $     8,267
                                              ------------  -----------  -----------  -----------  -----------
                                              ------------  -----------  -----------  -----------  -----------
Net income per share........................   $     0.31                                          $      0.31
                                              ------------                                         -----------
                                              ------------                                         -----------
Funds from operations (7)...................   $   12,180    $     724    $     479    $     686   $    14,070
                                              ------------  -----------  -----------  -----------  -----------
                                              ------------  -----------  -----------  -----------  -----------
Weighted average number of shares...........   23,196,858    1,276,961(8)    856,799(8)  1,275,199(8)  26,605,817
                                              ------------  -----------  -----------  -----------  -----------
                                              ------------  -----------  -----------  -----------  -----------
</TABLE>
 
- ------------------------------
(1) Except as otherwise noted, amounts represent the historical balances of  the
    Partnership.  Certain reclassifications to the historical balances have been
    made to conform to the Company's historical presentation.
 
(2) Historical amounts have been adjusted  to eliminate earnings related to  the
    Tendered Units and the Company's 30% interest in the earnings of SJP II.
 
(3)  Historical  amounts  have  been adjusted  to  eliminate  earnings  from the
    Tendered Units.
 
(4) Historical  amounts have  been  adjusted to  eliminate management  fees  and
    reimbursements  (included  as administrative  expenses on  the Partnerships'
    books) received by  the Company  in connection  with the  management of  the
    Partnerships' properties.
 
(5)  Historical amounts have been adjusted to reflect depreciation of the market
    value of self storage centers based on the Appraisals.
 
(6) Historical amounts  have been  adjusted to  reflect interest  (at 8.25%  per
    annum) on the Partnership's debt. All Partnership debt will be refinanced in
    the Mergers.
 
(7)  The Purchaser  defines funds from  operations ("FFO") as  net income before
    extraordinary items (determined in accordance with GAAP), plus  depreciation
    and  amortization related to  real estate activities,  plus or minus certain
    nonrecurring revenue and expenses. FFO is used by many financial analysts in
    evaluating REITs. FFO  should not  be considered  as an  alternative to  net
    income  (determined  in  accordance  with GAAP),  as  an  indication  of the
    Company's or the Partnerships' financial performance or cash from  operating
    activities  (determined  in  accordance  with  GAAP)  or  as  a  measure  of
    liquidity, nor is it necessarily indicative of sufficient cash flow to  fund
    all of the Company's or the Partnerships' needs.
 
(8) Calculation is based on an assumption of a $25.00 Share Price.
 
                                       67
<PAGE>
                 PRO FORMA CONSOLIDATED STATEMENT OF NET INCOME
                          YEAR ENDED DECEMBER 31, 1995
 
<TABLE>
<CAPTION>
                                                COMPANY                                              COMPANY
(IN THOUSANDS, EXCEPT PER SHARE AND SHARE      PRE-MERGER    IDS1 (1)     IDS2 (1)     IDS3 (1)    POST-MERGER
DATA)                                          PRO FORMA    ADJUSTMENTS  ADJUSTMENTS  ADJUSTMENTS   PRO FORMA
                                              ------------  -----------  -----------  -----------  -----------
<S>                                           <C>           <C>          <C>          <C>          <C>
Rental revenue..............................   $   94,381    $   6,465    $   4,309    $   7,225   $   112,380
Revenue from other real estate
 investments................................        2,508         (739)(2)       (278)(3)       (358)(3)       1,133
Property management revenue.................        3,780         (443)(4)       (313)(4)       (490)(4)       2,534
                                              ------------  -----------  -----------  -----------  -----------
    Total revenue...........................      100,669        5,283        3,718        6,377       116,047
                                              ------------  -----------  -----------  -----------  -----------
Operating expense...........................       26,194        1,516          958        1,820        30,488
Depreciation and amortization...............       18,143        1,331(5)        863(5)      1,399(5)      21,736
Real estate taxes...........................        7,727          466          324          506         9,023
General and administrative..................        5,543          138(4)         90(4)         94(4)       5,865
                                              ------------  -----------  -----------  -----------  -----------
    Total expenses..........................       57,607        3,451        2,235        3,819        67,112
                                              ------------  -----------  -----------  -----------  -----------
Income from operations......................       43,062        1,832        1,483        2,558        48,935
                                              ------------  -----------  -----------  -----------  -----------
Interest and other income...................          507          107           11           36           661
Interest expense............................      (12,014)          --         (235)(6)       (857)(6)     (13,106)
                                              ------------  -----------  -----------  -----------  -----------
    Total other income (expense)............      (11,507)         107         (224)        (821)      (12,445)
                                              ------------  -----------  -----------  -----------  -----------
Net income..................................   $   31,555    $   1,939    $   1,259    $   1,737   $    36,490
                                              ------------  -----------  -----------  -----------  -----------
                                              ------------  -----------  -----------  -----------  -----------
Net income per share........................   $     1.40                                          $      1.37
                                              ------------                                         -----------
                                              ------------                                         -----------
Funds from operations (7)...................   $   49,175    $   3,058    $   1,947    $   2,850   $    57,031
                                              ------------  -----------  -----------  -----------  -----------
                                              ------------  -----------  -----------  -----------  -----------
Weighted average number of shares...........   23,193,921    1,276,961(8)    856,799(8)  1,275,199(8)  26,602,880
                                              ------------  -----------  -----------  -----------  -----------
                                              ------------  -----------  -----------  -----------  -----------
</TABLE>
 
- ------------------------------
(1)  Except as otherwise noted, amounts represent the historical balances of the
    Partnership. Certain reclassifications to the historical balances have  been
    made to conform to the Company's historical presentation.
 
(2)  Historical amounts have been adjusted  to eliminate earnings related to the
    Tendered Units and the Company's 30% interest in the earnings of SJP II.
 
(3) Historical  amounts  have  been  adjusted to  eliminate  earnings  from  the
    Tendered Units.
 
(4)  Historical  amounts have  been adjusted  to  eliminate management  fees and
    reimbursements (included  as administrative  expenses on  the  Partnerships'
    books)  received by  the Company  in connection  with the  management of the
    Partnerships' properties.
 
(5) Historical amounts have been adjusted to reflect depreciation of the  market
    value of self storage centers based on the Appraisals.
 
(6)  Historical amounts  have been  adjusted to  reflect interest  (at 8.25% per
    annum) on the Partnership's debt. All Partnership debt will be refinanced in
    the Mergers.
 
(7) The  Company defines  funds from  operations ("FFO")  as net  income  before
    extraordinary  items (determined in accordance with GAAP), plus depreciation
    and amortization related to  real estate activities,  plus or minus  certain
    nonrecurring revenue and expenses. FFO is used by many financial analysts in
    evaluating  REITs. FFO  should not  be considered  as an  alternative to net
    income (determined  in  accordance  with  GAAP), as  an  indication  of  the
    Company's  or the Partnerships' financial performance or cash from operating
    activities  (determined  in  accordance  with  GAAP)  or  as  a  measure  of
    liquidity,  nor is it necessarily indicative of sufficient cash flow to fund
    all of the Company's or the Partnerships' needs.
 
(8) Calculation is based on an assumption of a $25.00 Share Price.
 
                                       68
<PAGE>
                    COMPARISONS OF PARTNERSHIPS AND COMPANY
 
    The  information below  highlights a  number of  the significant differences
between the Partnerships and the Company relating to, among other things,  forms
of   organization,  investment  objectives,  policies  and  restrictions,  asset
diversification, capitalization,  management  structure,  and  investor  rights.
These  comparisons are intended to assist Unitholders in understanding how their
investments will be  changed if, as  a result  of the Mergers,  their Units  are
exchanged  for Shares. Following the captioned  sections is a summary discussion
of the expected  effects of  the Mergers on  Unitholders who  receive Shares  in
exchange for their Units.
 
<TABLE>
<CAPTION>
                PARTNERSHIP                                     COMPANY
- --------------------------------------------  --------------------------------------------
<S>                                           <C>
                                   FORM OF ORGANIZATION
The  Partnerships  are  limited partnerships  The Company is a Delaware corporation formed
organized under  Washington law  formed  for  for  the  purpose  of  investing  in  a real
the purpose of  investing in  a real  estate  estate  portfolio  consisting  primarily  of
portfolio  consisting   primarily  of   self  self  storage facilities.  The Company began
storage facilities.  The  Partnerships  have  operations  on  March  1,  1994  through the
been  taxed  as  partnerships  for   federal  Consolidation  and  became self-administered
income  tax  purposes.  See  "Business   and  through  the  Management  Company  Merger in
Properties of the Partnerships."              March 1995. The Company qualifies as a  REIT
                                              for federal income tax purposes.
</TABLE>
 
    THE  PARTNERSHIPS ARE LIMITED PARTNERSHIPS UNDER WASHINGTON STATE LAW, WHILE
THE COMPANY IS  ORGANIZED AS A  DELAWARE CORPORATION. THE  PARTNERSHIPS AND  THE
COMPANY  ARE EACH VEHICLES  APPROPRIATE FOR HOLDING  REAL ESTATE INVESTMENTS AND
AFFORD  PASSIVE  INVESTORS,  SUCH  AS  UNITHOLDERS  AND  STOCKHOLDERS,   CERTAIN
BENEFITS,  INCLUDING LIMITED  LIABILITY, A PROFESSIONALLY  MANAGED PORTFOLIO AND
THE AVOIDANCE OF DOUBLE-LEVEL TAXATION  ON DISTRIBUTED INCOME. THE  PARTNERSHIPS
ARE  UNDER THE CONTROL OF THEIR GENERAL  PARTNERS, WHILE THE COMPANY IS GOVERNED
BY ITS BOARD OF DIRECTORS. IN ADDITION, THERE ARE SIGNIFICANT DIFFERENCES IN THE
TAX TREATMENT OF  THE PARTNERSHIPS AS  PARTNERSHIPS AND THE  COMPANY AS A  REIT.
SOME OF THE MATERIAL TAX DIFFERENCES ARE SUMMARIZED BELOW UNDER THE CAPTIONS "--
TAXATION OF TAXABLE INVESTORS" AND "-- TAXATION OF TAX-EXEMPT INVESTORS."
 
                                       69
<PAGE>
 
<TABLE>
<CAPTION>
                PARTNERSHIP                                     COMPANY
- --------------------------------------------  --------------------------------------------
<S>                                           <C>
                                   LENGTH OF INVESTMENT
An  investment in  each of  the Partnerships  Unlike the Partnerships, the Company intends
was presented  to  Unitholders as  a  finite  to continue its operations for an indefinite
length  investment, with  the Unitholders to  time period and  has no  specific plans  for
receive  regular  cash distributions  out of  disposition of the  assets acquired  through
the  Partnership's net  operating income and  the Consolidation or subsequent
special distributions of  net sale  proceeds  acquisitions.  The  Company  is  required to
through the liquidation of the Partnership's  distribute at least 95% of its REIT  Taxable
real  estate investments. Under  each of the  Income  (as  defined  in  "Material  Federal
Partnership   Agreements,  the  Partnerships  Income Tax Considerations -- Taxation of the
will terminate December  31, 2030;  however,  Company as a REIT -- Annual Distribution Re-
each  of  the General  Partners of  IDS1 and  quirements") to  maintain its  REIT  status.
IDS2  stated  its intention  of  selling its  However, the  Company is  allowed to  retain
Partnership's  properties within a period of  its net sale or refinancing proceeds for new
seven to nine years and the General  Partner  investments,  capital  expenditures, working
of IDS3  stated  its  intention  of  selling  capital   reserves   or   other  appropriate
within five to  ten years after  acquisition  purposes.  See  "Background and  Reasons for
or   development    of    the    properties.  the  Mergers --  Expected Benefits  from the
Unitholders were  advised that  sale of  the  Mergers."
Partnerships'   assets  would,  however,  be
dependent  upon   market   conditions.   See
"Business and Properties of the
Partnerships."
</TABLE>
 
    UNITHOLDERS  IN  EACH  OF  THE  PARTNERSHIPS  EXPECT  LIQUIDATION  OF  THEIR
INVESTMENTS WHEN THE ASSETS OF THE PARTNERSHIP ARE LIQUIDATED. IN CONTRAST,  THE
COMPANY  DOES NOT  EXPECT TO  DISPOSE OF  ITS INVESTMENTS  WITHIN ANY PRESCRIBED
PERIODS AND, IN  ANY EVENT, PLANS  TO RETAIN  THE NET SALE  PROCEEDS FOR  FUTURE
INVESTMENTS.   STOCKHOLDERS  ARE   EXPECTED  TO  ACHIEVE   LIQUIDITY  FOR  THEIR
INVESTMENTS BY TRADING SHARES OF THE COMMON  STOCK IN THE PUBLIC MARKET AND  NOT
THROUGH THE LIQUIDATION OF THE COMPANY'S ASSETS. THE COMMON STOCK MAY TRADE AT A
DISCOUNT FROM, OR PREMIUM TO, THE LIQUIDATION VALUE OF THE COMPANY'S PROPERTIES.
 
<TABLE>
<S>                                           <C>
                                   NATURE OF INVESTMENT
The  Units  of  each  Partnership constitute  The Shares  constitute equity  interests  in
equity  interests entitling  each Unitholder  the  Company.  Each   stockholder  will   be
to  its pro rata share of cash distributions  entitled to his or her pro rata share of the
made to the Unitholders of the  Partnership.  dividends  made with  respect to  the Common
Each of the Partnership Agreements specifies  Stock.  The   dividends   payable   to   the
how cash available for distribution, whether  Stockholders are not fixed in amount and are
arising   from   operations   or   sales  or  only paid  when  declared by  the  Company's
refinancings,  is  to  be  shared  among the  Board of Directors. The  Company has in  the
General   Partner   and   Unitholders.   The  past made quarterly dividends and intends to
distributions made  to the  Unitholders  are  continue   to  make  such  payments  in  the
not fixed  in amount  and depend  upon  each  future.  In order to qualify  as a REIT, the
Partnership's  operating  results  and   the  Company  must distribute at least 95% of its
amounts received upon sale or refinancing of  REIT Taxable Income.
the Partnership's assets.
</TABLE>
 
    BOTH THE UNITS AND SHARES  REPRESENT EQUITY INTERESTS ENTITLING THE  HOLDERS
THEREOF  TO  PARTICIPATE IN  THE  GROWTH OF  THE  PARTNERSHIPS AND  THE COMPANY,
RESPECTIVELY. DISTRIBUTIONS AND DIVIDENDS PAYABLE WITH RESPECT TO THE UNITS  AND
SHARES  DEPEND  UPON  THE  PERFORMANCE  OF  THE  PARTNERSHIPS  AND  THE COMPANY,
RESPECTIVELY.
 
                                       70
<PAGE>
 
<TABLE>
<CAPTION>
                PARTNERSHIP                                     COMPANY
- --------------------------------------------  --------------------------------------------
<S>                                           <C>
                              PROPERTIES AND DIVERSIFICATION
The investment  portfolio  of  each  of  the  The    Company   operates   a   network   of
Partnerships  is  limited   to  the   assets  approximately  265  storage  centers located
acquired with the initial equity raised from  throughout the United States and in  Europe.
the General Partners and Unitholders as well  Of  these properties,  it owns,  as of March
as  the  debt  financing  obtained  by   the  31,  1996, directly  and through  its wholly
Partnership within the established borrowing  owned subsidiaries and  joint ventures,  178
restrictions.   The  Partnerships   are  not  self storage properties located in 19 states
authorized  to   issue   additional   equity  and Europe and containing approximately 11.7
securities   to   expand   their  investment  million  net   rentable  square   feet.   In
portfolios.  See "Business and Properties of  addition,  the  Company  owns  two  business
the Partnerships."                            parks  and a  commercial building containing
                                              approximately 220,000  net  rentable  square
                                              feet  located  in  the  Seattle metropolitan
                                              area. The Company is currently expanding its
                                              portfolio of real estate properties and real
                                              estate based investments through the use  of
                                              equity  and debt capital, joint ventures and
                                              the  acquisition  and  development  of   new
                                              facilities.  See "Business and Properties of
                                              the Company."
</TABLE>
 
    THE INVESTMENT  PORTFOLIO FOR  EACH PARTNERSHIP  WAS LIMITED  TO THE  ASSETS
ACQUIRED  WITH ITS INITIAL EQUITY AND  LIMITED DEBT FINANCING. THE COMPANY HOLDS
AN INVESTMENT  PORTFOLIO  SUBSTANTIALLY LARGER  AND  MORE DIVERSIFIED  THAN  THE
PORTFOLIO  OF ANY OF THE  PARTNERSHIPS AND WITH THE  POTENTIAL FOR FUTURE GROWTH
THROUGH ACQUISITION AND DEVELOPMENT. AN INVESTMENT IN THE COMPANY SHOULD NOT  BE
VIEWED  AS  AN  INVESTMENT  IN A  SPECIFIC  POOL  OF ASSETS  BUT  INSTEAD  AS AN
INVESTMENT IN AN ONGOING REAL ESTATE  INVESTMENT BUSINESS, SUBJECT TO THE  RISKS
NORMALLY  ATTENDANT TO ONGOING REAL ESTATE OWNERSHIP AND TO THE RISKS RELATED TO
PROPERTY DEVELOPMENT.
 
                                       71
<PAGE>
 
<TABLE>
<CAPTION>
                PARTNERSHIP                                     COMPANY
- --------------------------------------------  --------------------------------------------
<S>                                           <C>
                                  PERMITTED INVESTMENTS
Each of the  Partnerships was authorized  to  Under  its Bylaws, the Company is authorized
invest in self storage facilities and office  to invest  in  self storage  facilities  and
and  business  parks. The  Partnerships have  office and  business  parks,  and  may  make
limited  their  investments to  self storage  mortgage loans, secured by properties of the
facilities,  with  the  exception  of  IDS3,  type  in  which the  Company may  invest, as
which has invested in an office building  as  long  as such investments  do not exceed 25%
well  as   self  storage   facilities.   See  of  its  "total assets"  (as defined  in the
"Business and Properties of the               Bylaws)  and   satisfy   certain   specified
Partnerships."                                underwriting criteria. As of March 31, 1996,
                                              over   90%  of  the   Company's  assets  are
                                              invested  in  self  storage  properties  and
                                              cash.  In  addition,  the  Company  may make
                                              other commercial real estate investments  if
                                              the    Board   of   Directors   specifically
                                              authorizes such investments  after making  a
                                              determination  that the  investments offer a
                                              means  of  maximizing   the  value  of   the
                                              Company's   assets   or   diversifying   its
                                              portfolio to protect the value of its  other
                                              investments.  The  Company  has  no  present
                                              plans to  make  such other  commercial  real
                                              estate investments.
</TABLE>
 
    THE  PARTNERSHIPS AND THE COMPANY HAVE CONCENTRATED THEIR INVESTMENTS ALMOST
SOLELY IN SELF  STORAGE FACILITIES. THE  BYLAWS OF THE  COMPANY AUTHORIZE IT  TO
MAKE  OTHER COMMERCIAL  REAL ESTATE  INVESTMENTS OR  MORTGAGE LOANS,  SECURED BY
APPROPRIATE INVESTMENTS, IF THE BOARD OF DIRECTORS MAKES CERTAIN  DETERMINATIONS
REQUIRED  BY  THE BYLAWS.  ACCORDINGLY, THE  COMPANY'S  INVESTMENTS MAY  BE MORE
DIVERSIFIED  THAN   THE  INVESTMENTS   OF  THE   PARTNERSHIPS.  THE   INVESTMENT
DIVERSIFICATION,  IF IT OCCURS, WHILE POTENTIALLY SERVING AS A HEDGE AGAINST THE
RISK OF HAVING ALL OF THE COMPANY'S INVESTMENTS LIMITED TO A SINGLE ASSET GROUP,
WOULD EXPOSE THE COMPANY TO THE RISK OF OWNING AND OPERATING ASSETS NOT DIRECTLY
RELATED TO ITS PRIMARY BUSINESS.
 
                                       72
<PAGE>
 
<TABLE>
<CAPTION>
                PARTNERSHIP                                     COMPANY
- --------------------------------------------  --------------------------------------------
<S>                                           <C>
                                    ADDITIONAL EQUITY
None of the  Partnerships are authorized  to  The   Board   of  Directors   may,   in  its
issue  equity  securities  other  than   the  discretion, issue additional equity
Units.   Therefore,   no  dilution   of  the  securities consisting  of  Common  Stock  or
Unitholders'   distributive  share  of  cash  Preferred Stock,  provided  that  the  total
available  for distribution can occur. After  number of shares issued does not exceed  the
the Unitholders receive cumulative            authorized  number of shares of Common Stock
distributions  equal  to  their   collective  or   Preferred  Stock   set  forth   in  the
capital  contributions  plus  a   cumulative  Company's  Certificate of Incorporation. The
noncompounded return  of  9%  per  annum  on  Company  expects to  raise additional equity
their "adjusted  capital contributions,"  as  from  time to time to increase its available
defined in the  Partnership Agreements,  the  capital.  The issuance  of additional shares
Unitholders' share  of  cash  available  for  of  either Common  Stock or  Preferred Stock
distribution decreases from 95% to 80%.       may result in the dilution of the  interests
                                              of the stockholders.
</TABLE>
 
    THE  PARTNERSHIPS  ARE NOT  AUTHORIZED TO  ISSUE  ADDITIONAL UNITS  OR OTHER
EQUITY INTERESTS AND, THEREFORE, THE UNITS  ARE NOT SUBJECT TO DILUTION,  EXCEPT
AS  PROVIDED  IN  THE  PARTNERSHIP  AGREEMENTS.  IN  CONTRAST,  THE  COMPANY HAS
SUBSTANTIAL FLEXIBILITY  TO RAISE  EQUITY CAPITAL  TO FINANCE  ITS BUSINESS  AND
AFFAIRS  THROUGH  THE SALE  OF  COMMON STOCK  OR  PREFERRED STOCK.  THE COMPANY,
THROUGH THE  ISSUANCE OF  NEW EQUITY  SECURITIES, MAY  SUBSTANTIALLY EXPAND  ITS
CAPITAL  BASE TO  MAKE NEW REAL  ESTATE INVESTMENTS. THE  ISSUANCE OF ADDITIONAL
EQUITY SECURITIES BY THE  COMPANY MAY DILUTE THE  INTERESTS OF STOCKHOLDERS  AND
THE COMPANY MAY ISSUE PREFERRED STOCK WITH PRIORITIES OR PREFERENCES OVER COMMON
STOCK WITH RESPECT TO DIVIDENDS AND LIQUIDATION PROCEEDS.
 
<TABLE>
<S>                                           <C>
                                    BORROWING POLICIES
Each  of the  Partnerships is  authorized to  The Company  is permitted  to borrow,  on  a
borrow   funds  necessary,   appropriate  or  secured or unsecured basis, funds to finance
advisable in  conducting  its  business  and  its  business,  subject  to  the restriction
affairs. The  Partnership  Agreements  place  contained   in   the  Bylaws   limiting  its
various restrictions on the authority of the  borrowing to not more than 50% of its "total
Partnerships to  borrow funds.  Furthermore,  assets"  and  not  more  than  300%  of  its
as a matter of  overall policy, each of  the  "adjusted  net  worth" (as  those  terms are
Partnerships limited the amount it  borrowed  defined in the Bylaws).
to   finance  its   acquisitions  and  other
business  activities.   See  "Business   and
Properties  of  the  Partnerships"  for  the
outstanding  borrowings  of   each  of   the
Partnerships as of March 31, 1996.
</TABLE>
 
    IN  CONDUCTING ITS  BUSINESS, THE  COMPANY MAY  BORROW FUNDS  SUBJECT TO THE
LIMITATION ON  INDEBTEDNESS OF  50% OF  TOTAL ASSETS  AND 300%  OF ADJUSTED  NET
WORTH.  THE COMPANY MAY  BE MORE LEVERAGED  THAN ANY OF  THE PARTNERSHIPS, WHICH
HAVE NOT INCURRED SIGNIFICANT BORROWINGS IN  COMPARISON TO THE OVERALL VALUE  OF
THEIR  ASSETS. BORROWING FUNDS MAY ALLOW THE COMPANY TO SUBSTANTIALLY EXPAND ITS
ASSET BASE, BUT  WILL ALSO  INCREASE THE COMPANY'S  RISKS DUE  TO ITS  LEVERAGED
INVESTMENTS.
 
                                       73
<PAGE>
 
<TABLE>
<CAPTION>
                PARTNERSHIP                                     COMPANY
- --------------------------------------------  --------------------------------------------
<S>                                           <C>
                       RESTRICTIONS UPON RELATED PARTY TRANSACTIONS
Each of the Partnership Agreements restricts  The   Bylaws   prohibit  the   Company  from
the  respective  Partnership  from  entering  engaging  in a transaction  with a director,
into certain business transactions with  the  officer,    advisor,   person    owning   or
General Partners and its affiliates,  except  controlling  10% or more of any class of the
to the  extent that  such transactions  were  Company's  outstanding voting securities, or
specifically  disclosed  in  the  disclosure  any    affiliate   of   the   aforementioned
document pursuant  to which  the Units  were  ("interested parties"), except to the extent
offered   and  sold   to  the   public.  The  that  such  transactions  are   specifically
Partnership  Agreement  for  IDS1 authorizes  authorized by the terms  of the Bylaws.  The
the   Partnership   to   enter   into  other  Bylaws prohibit  the Company  from  entering
transactions with its General Partner or its  into   a   transaction  with   any   of  the
affiliates only if the terms and  conditions  interested  parties  unless  the  terms  and
of the  transaction have  been disclosed  to  conditions  of  such transactions  have been
the Unitholders in  advance and approved  by  disclosed  to  the  Board  of  Directors and
the Unitholders holding of record more  than  approved  by  a  majority  of  directors not
75%  of  the  outstanding  Units  and,  with  otherwise    interested   in    the   matter
respect  to  any  proposed  services  to  be  (including   a   majority   of   independent
rendered to the Partnership, the              directors), and such directors in  approving
compensation for such services is comparable  the  transaction  have determined  it  to be
and competitive with that charged by a third  fair, competitive and commercially
party  rendering  comparable  services   and  reasonable,  and on terms and conditions not
certain other conditions are met. While  the  less  favorable  to the  Company  than those
Partnership Agreements for IDS2 and IDS3  do  available  from unaffiliated  third parties.
not  specify  a  procedure  for  authorizing  In   addition,   the   Bylaws   specifically
transactions with their General Partners  or  authorize  the  Company to  acquire property
affiliates, it  is possible  to amend  their  from  interested parties to  the extent that
Partnership Agreements to  authorize such  a  the  terms and conditions of the acquisition
transaction because each of the  Partnership  have  been  approved  by a  majority  of the
Agreements may be amended by a majority vote  directors not  otherwise interested  in  the
of Unitholders.                               transaction  (including  a  majority  of the
                                              independent directors)  and  such  directors
                                              have  made  good-faith determinations  as to
                                              the fairness  of the  compensation  provided
                                              for such property.
</TABLE>
 
    EXCEPT  FOR TRANSACTIONS SPECIFICALLY APPROVED IN THE PARTNERSHIP AGREEMENTS
(AND WHICH WERE DISCLOSED IN THE DISCLOSURE DOCUMENTS PREPARED FOR THE  OFFERING
AND  SALE  OF THE  UNITS), THE  PARTNERSHIPS  ARE NOT  AUTHORIZED TO  ENTER INTO
TRANSACTIONS  WITH  THE  GENERAL  PARTNERS  AND  THEIR  AFFILIATES  UNLESS   THE
TRANSACTIONS ARE APPROVED IN ADVANCE BY A VOTE OF THE UNITHOLDERS. THE BYLAWS OF
THE  COMPANY  CONTAIN SIMILAR  RESTRICTIONS, BUT  THE COMPANY  MAY ENTER  INTO A
TRANSACTION WITH ITS  DIRECTORS, OFFICERS  AND SIGNIFICANT  STOCKHOLDERS IF  THE
TRANSACTION  IS APPROVED BY  A MAJORITY OF  THE DIRECTORS NOT  INTERESTED IN THE
MATTER (INCLUDING A MAJORITY OF INDEPENDENT DIRECTORS) FOLLOWING A DETERMINATION
THAT THE  TRANSACTION  IS FAIR,  COMPETITIVE  AND COMMERCIALLY  REASONABLE.  THE
BYLAWS   DO  NOT  REQUIRE  THE  APPROVAL   OF  STOCKHOLDERS  FOR  ENTERING  INTO
TRANSACTIONS WITH INTERESTED PARTIES.
 
                                       74
<PAGE>
 
<TABLE>
<CAPTION>
                PARTNERSHIP                                     COMPANY
- --------------------------------------------  --------------------------------------------
<S>                                           <C>
                           COMPENSATION, FEES AND DISTRIBUTIONS
The  compensation  and  fees  paid  by   the  Since  the  Management  Company  Merger, the
Partnerships relating to  the management  of  Company has been internally managed. Instead
the Partnerships and their properties are as  of  paying fees for management services, the
follows:                                      Company uses its own employees to manage its
  (a) Property management fee to the Company  properties.
  equal to 6% of gross revenues (reduced  to
  5%  of  gross  revenues  from  office  and
  business parks)  received  from  operating
  the Partnership's properties;
  (b)  Advertising fee to the Company at the
  rate of $75  per month  for each  property
  (except   with   respect  to   the  office
  building owned by IDS3); and
  (c)  Reimbursements  to  the  Company  for
  certain out-of-pocket expenses incurred in
  the   management   of   the  Partnership's
  assets.
In addition,  the  General Partner  of  each
Partnership  receives  5% of  cash available
for distribution  until the  Unitholders  of
that  Partnership  have  received cumulative
distributions  equal  to  the   Unitholders'
collective   capital  contributions  plus  a
cumulative noncompounded  return of  9%  per
annum on their Adjusted Capital
Contributions, as defined in the Partnership
Agreements.  Thereafter, the General Partner
receives   20%   of   cash   available   for
distribution.
</TABLE>
 
    UNDER  THE PARTNERSHIP  AGREEMENTS AND  THE MANAGEMENT  SERVICES AGREEMENTS,
EACH OF THE PARTNERSHIPS  PAYS COMPENSATION TO ITS  GENERAL PARTNER AND FEES  TO
THE  COMPANY. AFTER  THE MERGERS, NO  FEES WILL BE  PAID TO THE  COMPANY AND THE
COMPANY WILL MANAGE THE PARTNERSHIPS'  PROPERTIES THROUGH ITS EMPLOYEES.  UNLIKE
UNITHOLDERS,   STOCKHOLDERS  REALIZE  CERTAIN   EFFICIENCIES  ARISING  FROM  THE
COMPANY'S SELF-MANAGED  STRUCTURE  AND  THE  COMPANY  CAN  EXPAND  ITS  PROPERTY
HOLDINGS   WITHOUT  A  PROPORTIONATE  INCREASE  IN  THE  COST  OF  MANAGING  THE
PROPERTIES, WHICH RESULTS WHEN PROPERTIES ARE MANAGED BY AN OUTSIDE ADVISOR.
 
                                       75
<PAGE>
 
<TABLE>
<CAPTION>
                PARTNERSHIP                                     COMPANY
- --------------------------------------------  --------------------------------------------
<S>                                           <C>
                          MANAGEMENT CONTROL AND RESPONSIBILITY
Under each  of the  Partnership  Agreements,  The Board of Directors has exclusive control
the General Partners are, subject to certain  over  the  Company's  business  and  affairs
narrow   limitations,   vested   with    all  subject  only  to  the  restrictions  in the
management authority to conduct the business  Certificate of Incorporation and the Bylaws.
of the Partnership, including authority  and  Stockholders have the right to elect members
responsibility for overseeing all executive,  of the Board of Directors. The directors are
supervisory   and   administrative  services  accountable to  the Company  as  fiduciaries
rendered  to  the  Partnership.  The General  and are required to exercise good faith  and
Partners have the right to continue to serve  integrity   in   conducting   the  Company's
in  such  capacities  unless  removed  by  a  affairs. See "Fiduciary Responsibility."
majority    vote    of    the   Unitholders.
Unitholders have no right to participate  in
the    management   and   control   of   the
Partnership and have no voice in its affairs
except for certain limited matters that  may
be  submitted to  a vote  of the Unitholders
under   the   terms   of   the   Partnership
Agreements.  See  "--  Voting  Rights."  The
General   Partners   are   accountable    as
fiduciaries   to  the  Partnership  and  are
required  to   exercise   good   faith   and
integrity  in  their dealings  in conducting
the Partnership's  affairs.  See  "Fiduciary
Responsibility."
</TABLE>
 
    STOCKHOLDERS  HAVE GREATER CONTROL  OVER MANAGEMENT OF  THE COMPANY THAN THE
UNITHOLDERS HAVE  OVER THE  PARTNERSHIPS BECAUSE  THE MEMBERS  OF THE  COMPANY'S
BOARD OF DIRECTORS ARE ELECTED FOR THREE-YEAR TERMS, WITH A PORTION OF THE BOARD
OF  DIRECTORS  ELECTED  AT  EACH ANNUAL  MEETING  OF  STOCKHOLDERS.  THE GENERAL
PARTNERS DO NOT NEED TO SEEK RE-ELECTION, BUT INSTEAD SERVE UNLESS REMOVED BY AN
AFFIRMATIVE VOTE OF UNITHOLDERS OWNING A MAJORITY OF THE UNITS ENTITLED TO VOTE,
WHICH IS GENERALLY AN EXTRAORDINARY  EVENT. STOCKHOLDERS, LIKE UNITHOLDERS,  ARE
PASSIVE  INVESTORS AND MUST RELY UPON  MANAGEMENT FOR THE PRUDENT ADMINISTRATION
OF THEIR INVESTMENTS.
 
                                       76
<PAGE>
 
<TABLE>
<CAPTION>
                PARTNERSHIP                                     COMPANY
- --------------------------------------------  --------------------------------------------
<S>                                           <C>
                         MANAGEMENT LIABILITY AND INDEMNIFICATION
As  a  matter  of  state  law,  the  General  The  Company's directors  are not personally
Partners have liability  for the payment  of  liable   for  ordinary  liabilities  of  the
Partnership obligations  and  debts,  unless  Company.  The  Certificate  of Incorporation
limitations   upon   such   liability    are  provides  that  a  director's  liability for
expressly stated in the obligation. Each  of  breach  of fiduciary duty  is limited to the
the  Partnership  Agreements  provides  that  full  extent  allowable under  Delaware law.
neither General  Partners  nor  any  of  the  The  Bylaws  and  state  laws  provide broad
affiliates performing services on behalf  of  indemnification   rights  to  directors  and
the  Partnership  will  be  liable  to   the  officers  who act  in good  faith, and  in a
Partnership or its  Unitholders for any  act  manner  reasonably believed to  be in or not
or omission performed in good faith pursuant  opposed to the best interests of the Company
to  authority  granted  by  the  Partnership  and,  with  respect to  criminal  actions or
Agreement,  and  in   a  manner   reasonably  proceedings,   who  act  without  reasonable
believed to be within the scope of authority  cause to believe their conduct was unlawful.
granted and  in the  best interests  of  the  In  addition, the Bylaws indemnify directors
Partnership,  provided  that  such  act   or  and   officers   against  amounts   paid  in
omission   did    not   constitute    fraud,  settlement, authorize the Company to advance
misconduct,  bad  faith  or  negligence.  In  expenses  incurred  in  defense,  upon   the
addition,    the    Partnership   Agreements  Company's   receipt   of   an    appropriate
indemnify  the  General  Partners  and their  undertaking  to   repay  such   amounts   if
affiliates   for  liability,  loss,  damage,  appropriate, and  authorize the  Company  to
costs  and  expenses,  including  attorneys'  carry  insurance  for  the  benefit  of  its
fees,  incurred  by them  in  conducting the  officers and directors  even for matters  as
Partnerships'  business, except  in the case  to which such  persons are  not entitled  to
of   fraud,   misconduct,   bad   faith   or  indemnification. See "Fiduciary
negligence.                                   Responsibility." In the Mergers, the Company
                                              will be assuming all existing and contingent
                                              liabilities of  the Partnerships,  including
                                              their  obligations to  indemnify the General
                                              Partners.
</TABLE>
 
    THE  GENERAL  PARTNER  OF   EACH  OF  THE   PARTNERSHIPS  HAS,  UNDER   MOST
CIRCUMSTANCES,  NO  LIABILITY  TO  ITS  PARTNERSHIP  FOR  ACTS  OR  OMISSIONS IT
UNDERTAKES WHEN PERFORMED IN GOOD FAITH,  IN A MANNER REASONABLY BELIEVED TO  BE
WITHIN  THE SCOPE OF ITS AUTHORITY AND IN THE BEST INTERESTS OF THE PARTNERSHIP.
EACH GENERAL PARTNER  ALSO HAS,  UNDER SPECIFIED  CIRCUMSTANCES, A  RIGHT TO  BE
REIMBURSED BY ITS PARTNERSHIP FOR LIABILITY, LOSS, DAMAGE, COSTS AND EXPENSES IT
INCURS  BY  VIRTUE OF  SERVING AS  GENERAL PARTNER.  ALTHOUGH THE  STANDARDS ARE
EXPRESSED SOMEWHAT  DIFFERENTLY, THERE  ARE SIMILAR  PROTECTIONS FROM  LIABILITY
AVAILABLE  TO DIRECTORS AND OFFICERS OF THE COMPANY WHEN ACTING ON BEHALF OF THE
COMPANY AND RIGHTS OF  DIRECTORS AND OFFICERS TO  SEEK INDEMNIFICATION FROM  THE
COMPANY.   THE  COMPANY   BELIEVES  THAT   THE  SCOPE   OF  THE   LIABILITY  AND
INDEMNIFICATION  PROVISIONS  IN  THE  COMPANY'S  GOVERNING  DOCUMENTS   PROVIDES
PROTECTION AGAINST CLAIMS FOR PERSONAL LIABILITY AGAINST THE COMPANY'S DIRECTORS
AND  OFFICERS WHICH IS COMPARABLE TO, THOUGH NOT IDENTICAL WITH, THE PROTECTIONS
AFFORDED TO  THE GENERAL  PARTNERS AND  THEIR AFFILIATES  UNDER THE  PARTNERSHIP
AGREEMENTS. IN THE MERGERS, THE COMPANY WILL BE ASSUMING ALL OF THE EXISTING AND
CONTINGENT  LIABILITIES  OF  THE PARTNERSHIPS,  INCLUDING  THEIR  OBLIGATIONS TO
INDEMNIFY THE GENERAL PARTNERS.
 
                                       77
<PAGE>
 
<TABLE>
<CAPTION>
                PARTNERSHIP                                     COMPANY
- --------------------------------------------  --------------------------------------------
<S>                                           <C>
                                 ANTITAKEOVER PROVISIONS
Changes in management  can be effected  only  The  Certificate of Incorporation and Bylaws
by removal  of the  General Partners,  which  contain  a number  of provisions  that might
action   requires   a   majority   vote   of  have  the effect of delaying or discouraging
Unitholders. Due to transfer restrictions in  a hostile  takeover  of the  Company.  These
the   Partnership  Agreements,  the  General  provisions  include,   among   others,   the
Partners may restrict transfers of the Units  following:
and,   in  particular,  affect  whether  the  (a) the power of  the Board of Directors  to
transferees  have voting rights. An assignee    issue  40,000,000   shares  of   Preferred
of  a  Unit  may  not  become  a  substitute    Stock, with such rights and preferences as
Unitholder, entitling him or her to vote  on    determined  by  the  Board  of  Directors;
matters  that  may   be  submitted  to   the    (b) the power of the Board of Directors to
Unitholders   for   approval,   unless  such    stop  transfer  and/or  redeem  shares  of
substitution  is consented to by the General    Common   Stock    under   the    following
Partners,  which  consent,  in  the  General    conditions: from any stockholder who owns,
Partners'  absolute   discretion,   may   be    directly  or indirectly,  9.8% or  more of
withheld. The General Partners may  exercise    the  outstanding  Common  Stock,  from any
this right of  approval to  deter, delay  or    five   or  fewer   stockholders  who  own,
hamper attempts  by  persons  to  acquire  a    directly  or indirectly, more  than 50% of
majority interest of the Unitholders.           the outstanding Common Stock, or from  any
                                                other   stockholder   if   the   Board  of
                                                Directors  otherwise  determines  in  good
                                                faith  that  ownership of  the outstanding
                                                Common   Stock   has    or   may    become
                                                concentrated to an extent that may prevent
                                                the  Company  from  qualifying  as  a REIT
                                                under   the   Code.   Any   Common   Stock
                                                transferred    in   violation    of   this
                                                restriction becomes  "Excess Stock,"  with
                                                no  voting  or  distribution  rights.  The
                                                Company  has  the  power  to  purchase  or
                                                direct the sale of such Excess Stock, with
                                                the sale proceeds being paid to the former
                                                owner; and
                                                (c)  the  classified  Board  of Directors,
                                                wherein only  one-third of  directors  are
                                                re-elected  to the Board in any given year
                                                and  directors  serve  three-year   terms.
                                              In  addition, the Company  has a Stockholder
                                              Rights Plan.  See  "Description  of  Capital
                                              Stock  --  Common Stock  and Class  B Common
                                              Stock   --    Stockholder   Rights    Plan."
</TABLE>
 
    CERTAIN  PROVISIONS OF THE  GOVERNING DOCUMENTS OF  THE PARTNERSHIPS AND THE
COMPANY COULD BE USED  TO DETER ATTEMPTS TO  OBTAIN CONTROL OF THE  PARTNERSHIPS
AND  THE COMPANY IN  TRANSACTIONS NOT APPROVED  BY THE GENERAL  PARTNERS AND THE
BOARD  OF  DIRECTORS,   RESPECTIVELY.  BECAUSE  THE   COMMON  STOCK  IS   FREELY
TRANSFERABLE  AND THE COMPANY'S DIRECTORS ARE ELECTED BY THE STOCKHOLDERS, THERE
IS A GREATER LIKELIHOOD OF  CHANGES IN CONTROL IN THE  CASE OF THE COMPANY  THAN
THE PARTNERSHIPS, NOTWITHSTANDING THOSE PROVISIONS DESCRIBED ABOVE.
 
                                       78
<PAGE>
 
<TABLE>
<CAPTION>
                PARTNERSHIP                                     COMPANY
- --------------------------------------------  --------------------------------------------
<S>                                           <C>
                                      VOTING RIGHTS
Unitholders  by a majority vote may, without  The Company's Board of Directors consists of
the concurrence  of  the  General  Partners,  three  classes. Stockholders are entitled to
amend the  Partnership  Agreement,  dissolve  elect  one class  of the  Company's Board of
the  Partnership,  remove  and/or  elect   a  Directors  at  each  annual  meeting  of the
General Partner, and  approve or  disapprove  Company.  The  Certificate  of Incorporation
the sale of all or substantially all of  the  and   the  Bylaws   grant  stockholders  the
Partnership's assets.  Unitholders  may  not  non-exclusive right, without approval of the
exercise these rights in a way to extend the  Board of Directors, to amend the Certificate
term   of   the   Partnership,   change  the  of Incorporation or the Bylaws, dissolve the
Partnership to a general partnership, change  Company, vote to remove members of the Board
the limited liability of the Unitholders  or  of  Directors, and approve or disapprove the
affect the  status  of the  Partnership  for  sale  of substantially all  of the Company's
federal income tax purposes.                  assets. In addition,  certain other  actions
                                              may  not be taken by  the Board of Directors
                                              without the approval of  a majority vote  of
                                              stockholders, including:
                                              (a) amending the Certificate of
                                              Incorporation;
                                                (b)   amending   certain   of   the  Bylaw
                                                provisions;
                                                (c)  merging  the  Company  with  or  into
                                                another corporation, unless the Company is
                                                the  surviving  entity  and  certain other
                                                conditions are met;
                                                (d) selling  all or  substantially all  of
                                                the Company's assets; and
                                                (e) dissolving the Company.
</TABLE>
 
    STOCKHOLDERS  HAVE  DIFFERENT VOTING  RIGHTS, INCLUDING  THE RIGHT  TO ELECT
DIRECTORS ON A PERIODIC BASIS, THAN THE VOTING RIGHTS AFFORDED TO UNITHOLDERS.
 
<TABLE>
<S>                                           <C>
                              LIMITED LIABILITY OF INVESTORS
Under each of the Partnership Agreements and  Under Delaware law, stockholders will not be
applicable  state  law,  the  liability   of  liable for Company debts or obligations. The
Unitholders  for the Partnership's debts and  Shares, upon  issuance, will  be fully  paid
obligations  is  limited  to  the  amount of  and nonassessable.
their   investment   in   the   Partnership,
together  with an  interest in undistributed
income, if any. The Units are fully paid and
nonassessable.
</TABLE>
 
    THE LIMITATION  ON PERSONAL  LIABILITY  OF STOCKHOLDERS  OF THE  COMPANY  IS
SUBSTANTIALLY THE SAME AS THAT OF UNITHOLDERS IN THE PARTNERSHIPS.
 
                                       79
<PAGE>
 
<TABLE>
<CAPTION>
                PARTNERSHIP                                     COMPANY
- --------------------------------------------  --------------------------------------------
<S>                                           <C>
                                 REVIEW OF INVESTOR LISTS
Unitholders  of each of the Partnerships are  A  stockholder  is  entitled,  upon  written
entitled to request copies of investor lists  demand,  to inspect  and copy  the Company's
showing  the  names  and  addresses  of  all  stock  records  at  any  time  during  usual
Unitholders of the Partnership. The right to  business  hours  for  a  purpose  reasonably
receive  such investor  lists is conditioned  related  to  his  or   her  interest  as   a
upon the Unitholder's payment of the cost of  stockholder.
duplication and mailing.
</TABLE>
 
    UNITHOLDERS AND STOCKHOLDERS ARE ENTITLED TO ACCESS TO INVESTOR LISTS AND TO
STOCK RECORDS, RESPECTIVELY, SUBJECT TO CERTAIN REQUIREMENTS.
 
<TABLE>
<S>                                           <C>
                                        LIQUIDITY
The  Units  may not  be transferred  if such  The Common Stock is freely transferable  and
transfers would result in the termination of  listed on the NYSE. See "Risk Factors."
the  Partnership  under Section  708  of the
Code or cause  the Partnership  to lose  its
classification   as   a   "partnership"  for
federal income tax purposes. In addition, no
transferee of a Unit has the right to become
a  substitute  Unitholder  (entitling   such
person  to  vote on  matters submitted  to a
vote of the Unitholders) unless, among other
things, such substitution is approved by the
General Partners, who may grant or  withhold
such  consent in  their absolute discretion.
In view  of the  foregoing restrictions,  it
was  never intended that  the Units would be
actively   traded,   and   no    broad-based
secondary market for the Units exists.
</TABLE>
 
    THE  UNITS  CONSTITUTE  ILLIQUID  INVESTMENTS AND  UNITHOLDERS  MAY  FIND IT
DIFFICULT TO DISPOSE OF THEIR UNITS, IF THEY WISH TO DO SO, OR MAY BE  OBLIGATED
TO SELL THE UNITS AT SUBSTANTIAL DISCOUNTS TO FACILITATE THE SALES. IN CONTRAST,
THE COMMON STOCK IS LISTED ON THE NYSE.
 
                                       80
<PAGE>
 
<TABLE>
<CAPTION>
                PARTNERSHIP                                     COMPANY
- --------------------------------------------  --------------------------------------------
<S>                                           <C>
                              TAXATION OF TAXABLE INVESTORS
Income   or  loss  earned  by  each  of  the  Because the Company qualifies as a REIT, the
Partnerships is not taxed at the partnership  Company generally  is  permitted  to  deduct
level.  Unitholders  are required  to report  distributions  to  its  stockholders,  which
their  allocable share of Partnership income  effectively  reduces   or   eliminates   the
and  loss on  their respective  tax returns.  "double  taxation"  (at  the  corporate  and
Income   and   loss  from   the  Partnership  stockholder levels)  that typically  results
generally  constitute  "passive"  income and  when  a   corporation   earns   income   and
loss,  which can  generally offset "passive"  distributes that income  to stockholders  in
income  and loss from other investments. Due  the form  of  dividends.  Stockholders  will
to  depreciation  and  other  noncash items,  recognize income on Company distributions to
cash   distributions   are   not   generally  the   extent  of   current  and  accumulated
equivalent to the income and loss  allocated  earnings   and   profits  of   the  Company.
to Unitholders. During operations, such cash  Distributions in excess of such earnings and
distributions are  partially sheltered  but,  profits  are taxable to  stockholders to the
if the  properties  retain  their  value  or  extent   such   distributions   exceed   the
appreciate, gain  upon  liquidation  of  the  stockholder's   tax  basis  in  his  or  her
asset will  exceed  the  cash  distributions  shares.  Dividends received  by stockholders
available to Unitholders.  After the end  of  from  the Company  generally will constitute
each fiscal year, Unitholders receive annual  portfolio  income,   which   cannot   offset
schedule  K-1 forms  showing their allocable  "passive"  income   and  loss   from   other
share  of  Partnership income  and  loss for  investments. Losses  and  credits  generated
inclusion   on  their   federal  income  tax  within the Company  do not  pass through  to
returns.  Unitholders  are also  required to  the  stockholders.  Because  the  amount  of
file  state  income tax  returns  and/or pay  distributions required  to  be made  by  the
state  income taxes  in Arizona, California,  Company for purposes of maintaining its REIT
Georgia, Michigan, Oregon and Virginia.       characterization is  determined based  on  a
                                              percentage  of  taxable  income  (calculated
                                              with depreciation deductions, excluding  any
                                              net  capital gains  and prior  to payment of
                                              any dividends) the  amount of  distributions
                                              required  to be  made by the  Company may be
                                              less than  the  distributions  made  by  the
                                              Partnership.  After the end of the Company's
                                              calendar year, stockholders will receive the
                                              less  complicated  Form  1099-DIV  used   by
                                              corporations   to   report   their  dividend
                                              income. See  "Material  Federal  Income  Tax
                                              Considerations."
</TABLE>
 
    EACH  OF THE PARTNERSHIPS IS A PASS-THROUGH ENTITY, WHOSE INCOME AND LOSS IS
NOT TAXED AT  THE ENTITY  LEVEL BUT INSTEAD  ALLOCATED DIRECTLY  TO THE  GENERAL
PARTNER  AND UNITHOLDERS. UNITHOLDERS  ARE TAXED ON INCOME  OR LOSS ALLOCATED TO
THEM, WHETHER  OR  NOT  CASH  DISTRIBUTIONS ARE  MADE  TO  THE  UNITHOLDERS.  IN
CONTRAST,  THE COMPANY QUALIFIES AS A REIT, ALLOWING IT TO DEDUCT DIVIDENDS PAID
TO ITS STOCKHOLDERS. TO THE EXTENT THE COMPANY HAS NET INCOME (AFTER TAKING INTO
ACCOUNT THE DIVIDENDS PAID DEDUCTION), SUCH INCOME WILL BE TAXED AT THE  COMPANY
LEVEL  AT THE STANDARD CORPORATE TAX  RATES. DIVIDENDS PAID TO STOCKHOLDERS WILL
CONSTITUTE PORTFOLIO INCOME AND NOT PASSIVE INCOME.
 
                                       81
<PAGE>
 
<TABLE>
<CAPTION>
                PARTNERSHIP                                     COMPANY
- --------------------------------------------  --------------------------------------------
<S>                                           <C>
                             TAXATION OF TAX-EXEMPT INVESTORS
Income  or  loss  earned  by  each  of   the  The  IRS has ruled  that income attributable
Partnerships is  generally treated  as  UBTI  to   an  investment  in   a  REIT  will  not
unless the type of  income generated by  the  constitute   UBTI   to   certain  tax-exempt
Partnerships  would   constitute   qualified  investors  as long as such investor does not
rental income or other specifically excluded  hold  its  shares  subject  to   acquisition
types  of income. For  Partnership income to  indebtedness. Accordingly, dividends
be  characterized  as  rental  income,   the  received  from  the Company  by  tax- exempt
Partnerships  cannot  provide  services   to  stockholders  should not  constitute UBTI if
tenants that are considered other than those  such  stockholders  did   not  finance   the
usually    or   customarily    rendered   in  acquisition of  the  Shares. The  amount  of
connection  with  the  rental  of  rooms for  dividends paid  to  tax-exempt  stockholders
occupancy  only.  Although  the Partnerships  may be less than  the distributions made  to
have  not  obtained  a ruling  from  the IRS  such   entities   from   their    respective
addressing  the issue of  whether the income  Partnerships because of the REIT requirement
received by the  Partnerships in  connection  that  distributions be based on a percentage
with  the  leasing  of  self  storage  units  of   REIT  Taxable   Income.  See  "Material
constitutes rental  income  for  these  UBTI  Federal Income Tax Considerations."
purposes, the Company has obtained a private
ruling  from  the  IRS with  respect  to the
characterization  of  the  Company's  rental
income  taking  into  account  the  services
rendered   by   the   Company.   Based    on
representations  from  the  General Partners
that the services  rendered with respect  to
the properties owned by the Partnerships are
consistent  with those services described in
the  Company's  ruling,  the   Partnerships'
income  should  not be  treated as  UBTI for
tax-exempt  partners;  however,  this  is  a
factual issue on which the Partnerships have
received no ruling.
</TABLE>
 
    A  TAX-EXEMPT  ENTITY IS  TREATED  AS OWNING  AND  CARRYING ON  THE BUSINESS
ACTIVITY CONDUCTED  BY A  PARTNERSHIP IN  WHICH SUCH  ENTITY OWNS  AN  INTEREST.
ACCORDINGLY,  TO  THE  EXTENT  A  TAX-EXEMPT  PARTNER  OWNS  AN  INTEREST  IN  A
PARTNERSHIP, THE INCOME RECEIVED BY SUCH PARTNERSHIP MUST NOT CONSTITUTE UBTI IN
ORDER FOR THE TAX-EXEMPT PARTNER TO AVOID TAXATION. THE INCOME RECEIVED FROM THE
PARTNERSHIPS' SELF STORAGE BUSINESS  SHOULD QUALIFY AS  RENTAL INCOME FOR  THESE
PURPOSES  (THEREFORE,  NOT  UBTI).  DIVIDENDS  PAID  WITH  RESPECT  TO,  OR GAIN
RECOGNIZED ON A DISPOSITION OF, THE SHARES ARE NOT UBTI.
 
                                       82
<PAGE>
                             CONFLICTS OF INTEREST
 
    A  number of conflicts  of interest are inherent  in the relationships among
the Partnerships, the  General Partners and  the Company and  its directors  and
officers. Certain of these conflicts of interest are summarized below.
 
COMMON COMPOSITION OF GENERAL PARTNERS
 
    Although  a different limited  partnership serves as  the General Partner of
each Partnership,  the general  and  limited partners  of  each of  the  General
Partners  are  identical.  The  General  Partner  of  each  Partnership  has  an
independent obligation to  ensure that such  Partnership's participation in  the
Mergers  is fair and equitable,  without regard to whether  the Mergers are fair
and equitable to the other participants (including the other Partnerships).  See
"Fiduciary  Responsibility -- General Partners of the Partnerships." The General
Partners of the Partnerships have sought to discharge faithfully this obligation
to each  Partnership; however,  Unitholders  should consider  that each  of  the
general  and limited partners of the  General Partner of each Partnership serves
in a  similar capacity  with  respect to  the General  Partner  of each  of  the
Partnerships.  If each of  the Partnerships had a  separate General Partner with
general and limited partners who did not serve in similar capacities for any  of
the  other Partnerships, these persons would have had an independent perspective
which  might  have  led  them  to  advocate  positions  during  negotiating  and
structuring the Mergers different than those taken by the General Partners.
 
OVERLAPS BETWEEN AFFILIATES OF THE GENERAL PARTNERS AND DIRECTORS AND OFFICERS
OF THE COMPANY
 
    Charles  K. Barbo, the Chairman of  the Board, President and Chief Executive
Officer of the Company, is an individual general partner of each of the  General
Partners  and the sole  shareholder and director of  SGPI, the corporate general
partner of  each  of the  General  Partners. As  such,  he is  able  to  control
decisions  made by  the general partners  of the General  Partners. In addition,
Harrell L. Beck, Senior Vice President, Chief Financial Officer and Treasurer of
the Company,  serves  as  Treasurer  of SGPI;  Kristin  H.  Stred,  Senior  Vice
President,  General Counsel and Secretary of the Company, serves as Secretary of
SGPI; and Michael Rowe, Chief Operating  Officer of the Company, serves as  Vice
President of SGPI.
 
COMPANY OWNERSHIP OF UNITS
 
    As  of the date of this Proxy Statement/Prospectus, the Company beneficially
owns approximately        IDS1  Units  (approximately     %),        IDS2  Units
(approximately     %)  and        IDS3 Units  (approximately    %).  The Company
participates in  the Partnerships'  distributions  on the  same terms  as  other
Unitholders  in respect of  the Units owned  by it. The  Company intends to vote
these Units in favor of  the Mergers. No other  partner of the General  Partners
beneficially owns any Units.
 
GENERAL PARTNER'S INTEREST
 
    Pursuant  to  each of  the Partnership  Agreements,  the General  Partner is
entitled to a percentage of the Partnership's cash distributions based upon  the
amount  of distributions made to the Unitholders. Initially, the General Partner
receives 5% of all Partnership distributions until such time as the  Unitholders
have  received a cumulative  amount of Partnership  distributions equal to their
collective capital contributions  plus a cumulative  noncompounded return of  9%
per  annum on their adjusted capital contributions (such cumulative amount being
referred to  as  the  "Unitholders'  Preference").  Once  the  Unitholders  have
received  distributions  equal  to their  Unitholders'  Preference,  the General
Partner receives 20% of all further cash  distributions. As of the date of  this
Proxy  Statement/ Prospectus, the Unitholders have not received Partnership cash
distributions equal to the
 
                                       83
<PAGE>
Unitholders' Preference for  any of the  Partnerships. Accordingly, the  General
Partners  have been  limited to receiving  5% of  Partnership cash distributions
resulting in the receipt of the following distributions by the General  Partners
for the periods indicated.
 
<TABLE>
<CAPTION>
                                                                                THREE MONTHS
                                                YEAR ENDED DECEMBER 31,             ENDED
                                         -------------------------------------    MARCH 31,
PARTNERSHIP                                 1993         1994         1995          1996
- ---------------------------------------  -----------  -----------  -----------  -------------
<S>                                      <C>          <C>          <C>          <C>
IDS1...................................  $   118,219  $   132,846  $   149,909   $    37,782
IDS2...................................       94,664       95,610       98,448        24,612
IDS3...................................       96,077      111,764      117,648        29,412
</TABLE>
 
    The  Company  (or  its predecessor)  and  IPSC  each received  40%  of these
amounts. Messrs. Barbo  and Buerk each  received 9.9% and  SGPI received .2%  of
these amounts in accordance with the applicable GP Agreement.
 
    The  General Partners' percentage interest  in the Merger Consideration will
be based upon the above  distribution principles. As of  the date of this  Proxy
Statement/Prospectus,  the Net Asset Value  of IDS1 and IDS2  is not expected to
exceed the amount of its undistributed Unitholders' Preference. Accordingly, the
IDS1 General Partner and the IDS2 General Partner will only be entitled to 5% of
the Merger  Consideration paid  for those  Partnerships. With  respect to  IDS3,
however,  the Net Asset Value initially  allocable to Unitholders is expected to
exceed  an   amount  equal   to  its   undistributed  Unitholders'   Preference.
Accordingly,  the Unitholders  will be  treated as  receiving their Unitholders'
Preference and the IDS3 General Partner will be entitled to share in 20% of some
part, but not all, of the Merger Consideration. See "Fairness of the Mergers  --
Determination  of Merger Consideration" for additional information regarding the
portion of the Net Asset Values allocated to the General Partners and upon which
the Merger Consideration to be received by the General Partners will be based.
 
    Upon consummation of the Mergers (based upon a Share Price of $25.00),  each
of  the Company and IPSC will receive approximately 32,050 and 21,500 Shares for
its limited partner interest  in the IDS1 General  Partner and the IDS2  General
Partner, respectively. With respect to IDS3, IPSC will receive 52,600 Shares and
the Company will receive 49,975 Shares for their limited partner interest in the
IDS3  General Partner. Pursuant  to the Contingent  Shares Agreement, certain of
the Shares  received by  the Company  in  the Mergers  for its  limited  partner
interest in each of the General Partners will be remitted to former stockholders
of  the  Management  Company, which  include  Messrs.  Barbo and  Buerk  and the
executive officers of the Company.
 
MANAGEMENT AGREEMENTS
 
    The  Partnerships'  properties  are  managed  by  the  Company  pursuant  to
Management  Services Agreements under which the Company, as compensation for its
management services, receives a  monthly fee of 6%  of gross revenues from  self
storage properties (5% of revenues from office and business parks), plus $75 per
month  per self  storage property  for rendering  advertising services.  For the
years ended December 31, 1993,  1994 and 1995 and  the three months ended  March
31, 1996, the Company (or the Management Company prior to the Management Company
Merger)  received the following amounts in payment for these property management
and advertising fees:  approximately $310,000, $338,000,  $362,000 and  $91,000,
respectively, from IDS1; approximately $224,000, $249,000, $265,000 and $67,000,
respectively,  from  IDS2; and  approximately  $257,000, $408,000,  $448,000 and
$112,000, respectively, from  IDS3. In  addition, the Company  is reimbursed  at
cost by the Partnerships for certain expenses it incurs as property manager.
 
    Pursuant  to an agreement executed in connection with the Consolidation, the
Company paid an affiliate of  IPSC a quarterly fee  of $12,000 for each  quarter
commencing  July  1, 1994  and ending  June  30, 1996  for expenses  incurred in
rendering certain administrative services. In addition, the
 
                                       84
<PAGE>
Company will reimburse the IPSC affiliate for its expenses incurred for  similar
services  provided in connection with the Offers and Mergers. The IPSC affiliate
estimates that such expenses will not exceed $50,000.
 
OWNERSHIP OF COMPANY COMMON STOCK BY AFFILIATES OF THE GENERAL PARTNERS
 
    Charles K. Barbo and Arthur W. Buerk, individual general partners of each of
the General Partners,  are also  stockholders of the  Company. As  of March  31,
1996,  Messrs.  Barbo  and Buerk  beneficially  owned approximately  3%  and 2%,
respectively, of the Company's outstanding Common Stock.
 
CONTINGENT SHARES AGREEMENT
 
    In connection with the Management Company Merger, the Company and the former
shareholders of the  Management Company executed  a Contingent Shares  Agreement
dated  as  of March  24, 1995  (the "Contingent  Shares Agreement")  whereby the
former Management Company shareholders are entitled to receive shares of  Common
Stock  upon the sale or  transfer of, or the  occurrence of certain other events
with respect  to,  the  Company's  interests  in  certain  limited  partnerships
formerly  owned by the Management  Company, including the Partnerships. Assuming
the Share Price is $25.00 and that all the Mergers are consummated, pursuant  to
the  Contingent  Shares Agreement,  Messrs. Barbo  and  Buerk and  the executive
officers of the Company, as former stockholders of the Management Company,  will
receive  approximately  19,025,  11,575  and  4,450  shares,  respectively, upon
consummation of the Mergers.
 
ABSENCE OF INDEPENDENT SOLICITING AGENT; INDEMNIFICATION
 
    SRA,   the    Soliciting   Agent    in    connection   with    this    Proxy
Statement/Prospectus,  is  wholly  owned by  Charles  K. Barbo.  Mr.  Barbo, the
Chairman of the Board, President and Chief Executive Officer of the Company,  is
an  individual general  partner of  each of  the General  Partners and  the sole
stockholder and director of SGPI, the  corporate general partner of each of  the
General Partners.
 
    Because  of federal  and state  securities laws,  underwriters of securities
offered to the public may be expected to take such steps as may be necessary  to
satisfy  themselves that the information contained in the prospectus pursuant to
which the  securities are  offered is  accurate and  complete. These  steps  are
typically  taken by a "lead underwriter"  or "dealer manager" which participates
in the preparation of the prospectus. Because SRA is affiliated with the General
Partners and the Company, the review  and investigation of the Partnerships  and
the   Company   by   SRA   and   the   information   provided   in   this  Proxy
Statement/Prospectus will not have the benefit of, and may not be as  meaningful
as,  a review and investigation by an independent dealer manager. Investors must
rely on the General Partners and the Company regarding the information contained
in this Proxy  Statement/ Prospectus.  In addition,  the Company  has agreed  to
indemnify  SRA against certain liabilities to which SRA may become subject under
the federal and state securities laws.
 
                            FIDUCIARY RESPONSIBILITY
 
DIRECTORS AND OFFICERS OF THE COMPANY
 
    The directors  of  the  Company  are accountable  to  the  Company  and  its
stockholders  as fiduciaries and must  perform their duties in  good faith, in a
manner they  believe  to  be in  the  best  interests of  the  Company  and  its
stockholders  and with such care, including reasonable inquiry, as an ordinarily
prudent person in  a like position  would use under  similar circumstances.  The
Certificate  of Incorporation provides that the directors will not be personally
liable to the Company or to any stockholder  of the Company for the breach of  a
fiduciary responsibility, to the full extent that such limitation or elimination
of  liability is permitted under Delaware  law. The Certificate of Incorporation
and Bylaws provide that the Company will indemnify its directors and officers to
the full  extent  permitted under  Delaware  law.  Pursuant to  the  Bylaws  and
Delaware  law, the Company will indemnify  each director and officer against any
liability  and  related  expenses   (including  attorneys'  fees)  incurred   in
connection  with any proceeding in which he or  she may be involved by reason of
serving in such capacity so
 
                                       85
<PAGE>
long as the director or officer  acted in good faith and  in a manner he or  she
reasonably  believed  to be  in  or not  opposed to  the  best interests  of the
Company, and,  with  respect  to  any criminal  action  or  proceeding,  had  no
reasonable  cause to  believe his  or her conduct  was unlawful.  A director and
officer is also  entitled to  indemnification against expenses  incurred in  any
action  or suit by or in  the right of the Company  to procure a judgment in its
favor by reason of serving in such capacity if he or she acted in good faith and
in a manner reasonably believed to be in or not opposed to the best interests of
the Company, except that no such indemnification will be made if the director or
officer is judged to be  liable to the Company,  unless the applicable court  of
law  determines  that  despite the  adjudication  of liability  the  director or
officer is reasonably entitled to indemnification for such expenses. The  Bylaws
authorize  the Company to advance  funds to a director  or officer for costs and
expenses (including  attorneys' fees)  incurred  in a  suit or  proceeding  upon
receipt  of an undertaking by such director  or officer to repay such amounts if
it is ultimately determined that  he or she is  not entitled to be  indemnified.
Stockholders  may have  more limited  recourse against  such persons  than would
apply absent  these provisions.  To  the extent  that the  foregoing  provisions
concerning  indemnification apply to  actions arising under  the Securities Act,
the Company  has been  advised that,  in  the opinion  of the  Commission,  such
provisions are contrary to public policy and therefore are not enforceable.
 
GENERAL PARTNERS OF THE PARTNERSHIPS
 
    Under  Washington partnership law,  the General Partners  are accountable to
the Partnerships as  fiduciaries and  are required  to exercise  good faith  and
integrity  in all their  dealings in the  Partnerships' affairs. The Partnership
Agreements generally provide that neither the General Partners nor any of  their
affiliates  performing services on behalf of  the Partnerships will be liable to
the Partnerships or any of the Unitholders  for any act or omission by any  such
person  performed in good faith pursuant to the authority granted to such person
by the Partnership Agreements,  or in accordance with  its provisions, and in  a
manner  reasonably believed by such  person to be within  the scope of authority
granted to such person and in  the best interests of the Partnerships,  provided
that  such act or  omission did not  constitute fraud, misconduct,  bad faith or
negligence. As a result, Unitholders might  have a more limited right of  action
in certain circumstances than they would have in the absence of such a provision
in the Partnership Agreements.
 
    The  Partnership Agreements also generally provide that the General Partners
and their  affiliates performing  services  on behalf  of the  Partnerships  are
indemnified  from  losses  incurred  by  them  on  behalf  of  their  respective
Partnership or  in furtherance  of the  Partnership's interests  (except to  the
extent   indemnification  is  prohibited  by  law)  provided  that  such  person
determined in good faith that the course of conduct was in the best interests of
the Partnership  and  provided  further  that the  course  of  conduct  did  not
constitute  fraud,  negligence, bad  faith or  misconduct.  For purposes  of the
foregoing, the affiliates of the General Partners will be indemnified only  when
operating  within the scope of the General Partner's authority and, for IDS2 and
IDS3, when performing services  on behalf of  their respective Partnership.  Any
claim  for indemnification  under the  Partnership Agreements  will be satisfied
only out of the assets of the applicable Partnership and no Unitholder will have
any personal  liability to  satisfy an  indemnification claim  made against  its
Partnership.
 
    Notwithstanding  the  foregoing,  neither  the  above-mentioned  persons nor
certain related parties  are to  be indemnified  by the  Partnerships from  loss
incurred  by such person in connection with any claim involving allegations that
such person violated federal or state securities laws unless (i) there has  been
a  successful  adjudication  on  the  merits  of  each  count  involving alleged
securities law violations as to the person seeking indemnification and the court
approves indemnification of  the litigation  costs, (ii) such  claims have  been
dismissed  with prejudice on the merits by a court of competent jurisdiction and
the court approves indemnification of the  litigation costs or (iii) a court  of
competent  jurisdiction  has approved  a settlement  of  the claims  against the
person seeking indemnification and finds that indemnification of the  settlement
and related costs should be made. In each of the foregoing situations, the court
of  law considering the  request for indemnification  must be advised  as to the
position of the Commission, certain state agencies specified in the  Partnership
Agreement    and   any   other   applicable   regulatory   authority   regarding
indemnification for violations of securities
 
                                       86
<PAGE>
laws. Indemnification may not be  enforceable as to certain liabilities  arising
from  claims under the Securities Act and  state securities laws. In the opinion
of the Commission, indemnification from these liabilities is contrary to  public
policy and is therefore unenforceable.
 
    The  Partnerships may also  advance funds to a  person indemnified under the
Partnership Agreements for legal expenses and  other costs incurred as a  result
of legal action brought against such person only if (i) the legal action relates
to  the  performance of  duties  or services  by such  person  on behalf  of the
Partnership, (ii)  the  legal  action is  initiated  by  a party  other  than  a
Unitholder  and (iii) such person undertakes to  repay the advanced funds to the
Partnership if it is subsequently determined that such person is not entitled to
indemnification  pursuant  to  the  terms  of  the  Partnership  Agreement.  Any
indemnification  required by  the Partnership  Agreements will  be made promptly
following the  fixing  of  the liability  by  a  final judgment  of  any  court,
settlement, contract or otherwise. The Partnerships do not pay for any insurance
covering  liability of the General Partners  or any other indemnified person for
acts or omissions for which indemnification is not permitted by the  Partnership
Agreements,  although the General Partners and  any other indemnified person may
be named as additional insured parties on policies obtained for the benefit of a
Partnership if there is no  additional cost to the  Partnership. As part of  its
assumption of liabilities in the Mergers, the Company will indemnify the General
Partners  and their affiliates to the extent of the indemnity under the terms of
the Partnership Agreements and applicable law.
 
                  BUSINESS AND PROPERTIES OF THE PARTNERSHIPS
 
GENERAL
 
    Each Partnership was  formed for  the purpose of  acquiring, developing  and
operating  self storage centers and office  and business parks. The Partnerships
have completed the  acquisition and  development phase of  their businesses  and
currently  focus  on operating  the  storage centers.  The  principal investment
objectives of the  Partnerships are  to provide their  Unitholders with  regular
quarterly  cash distributions which, for taxable Unitholders, are expected to be
partially tax-sheltered; to obtain long-term appreciation in the value of  their
property;   and  to  preserve  and   protect  their  Unitholders'  capital.  The
Partnerships share executive offices with the Company.
 
    The  following  table   sets  forth  selected   information  regarding   the
capitalization,  investments, leverage and real estate portfolio investments for
each of the Partnerships and their properties.
 
<TABLE>
<CAPTION>
                                                                                                               PERCENT LEVERAGE
                                               INVESTMENT IN    ACCUMULATED                      AMOUNT OF      OF REAL ESTATE
                     DATE     ORIGINAL TOTAL   PROPERTIES AT    DEPRECIATION   NET BOOK VALUE   LEVERAGE AT     APPRAISAL VALUE
                   OFFERING      CAPITAL         MARCH 31,      AT MARCH 31,    AT MARCH 31,     MARCH 31,       AT MARCH 31,
PARTNERSHIP         CLOSED      RAISED (1)       1996 (2)           1996          1996 (3)        1996 (4)         1996 (5)
- -----------------  ---------  --------------  ---------------  --------------  --------------  --------------  -----------------
<S>                <C>        <C>             <C>              <C>             <C>             <C>             <C>
IDS1.............   Mar-89    $   37,052,578  $    36,093,046  $    7,592,287  $   26,770,587  $            0           0.0%
IDS2.............   Mar-90        28,777,448       29,649,739       4,900,913      21,812,025       3,319,503          10.9
IDS3.............   Mar-92        29,803,675       37,480,443       3,577,384      24,357,316      10,384,295          20.4
                              --------------  ---------------  --------------  --------------  --------------        ------
    Total........             $   95,633,701  $   103,223,228  $   16,070,584  $   72,939,928  $   13,703,798          11.3%
                              --------------  ---------------  --------------  --------------  --------------        ------
                              --------------  ---------------  --------------  --------------  --------------        ------
</TABLE>
 
- ------------------------
(1) Total capital represents the gross offering proceeds raised from  investors,
    including General Partner and Unitholder contributions.
 
(2) Amount  represents  the total  investment in  land, buildings,  and personal
    property prior to depreciation.
 
(3) Net book value equals the Partnership's total assets less total  liabilities
    as of March 31, 1996.
 
(4) Amount represents total short- and long-term debt outstanding.
 
(5) The  percentages included  in this  column for  each of  the Partnerships is
    equal to a Partnership's  outstanding debt as of  March 31, 1996 divided  by
    the Appraised Value of that Partnership's real
 
                                       87
<PAGE>
    estate  portfolio.  The  "Total"  was  computed  by  dividing  the aggregate
    outstanding debt of all  of the Partnerships by  the aggregate value of  the
    Partnerships' properties as determined by the Appraisals.
 
    The  following  table sets  forth certain  information  with respect  to the
timing of investments in the Partnerships.
 
<TABLE>
<CAPTION>
                                                                        TIME TO
                                                                     INVEST 90% OF                   ORIGINAL      ORIGINAL
                                              YEAR OF     YEAR OF       AMOUNT         AVERAGE       EXPECTED      EXPECTED
                               NUMBER OF       FIRST        LAST     AVAILABLE FOR    LENGTH OF      HOLDING     DISPOSITION
PARTNERSHIP                   INVESTMENTS    INVESTMENT  INVESTMENT   INVESTMENT    INVESTMENT (1)  PERIOD (2)     TIME (3)
- --------------------------  ---------------  ----------  ----------  -------------  -------------  ------------  ------------
<S>                         <C>              <C>         <C>         <C>            <C>            <C>           <C>
IDS1 (4)..................            12        1988        1990       20 months       7 years      7-9 years     1995-1999
IDS2......................             8        1988        1991       28 months      6.5 years     7-9 years     1995-2000
IDS3......................            17        1991        1994       30 months      3.5 years     5-10 years    1996-2004
</TABLE>
 
- ------------------------
(1) This column is based on the simple  average of the length of time the  first
    property  acquired by the  Partnership has been held  by the Partnership and
    the length of time  the last property acquired  by the Partnership has  been
    held by the Partnership.
 
(2) This  is  the  anticipated holding  period  as stated  in  the Partnership's
    prospectus.
 
(3) The range of the original disposition time frame is based upon the date  the
    first  property was  acquired by the  Partnership plus  the minimum original
    expected holding period and the date  the last property was acquired by  the
    Partnership plus the maximum original expected holding period.
 
(4) Includes  four properties owned by SJP II  in which IDS1 owns a 70% interest
    and the Company owns a 30% interest.
 
EMPLOYEES AND PROPERTY MANAGEMENT
 
    Management  of  the  Partnerships'  facilities  is  conducted  through   the
employees  of the  Company pursuant to  the Management  Services Agreements. See
"Conflicts of Interest -- Management  Agreements." The Company provides  on-site
managers  as  well  as  operation and  district  managers  to  supervise on-site
management. Under  the Management  Services Agreements,  the salary  and  salary
related expenses of on-site employees are borne by the Partnerships.
 
                                       88
<PAGE>
IDS1
 
PROPERTY INFORMATION
 
    IDS1  owns  and  operates eight  self  storage  properties and  holds  a 70%
interest in SJP II, which owns  four self storage properties. The remaining  30%
interest  in  SJP II  is held  by the  Company. These  12 properties,  which are
located in six states, contained approximately 764,000 net rentable square  feet
(including  100%  of the  SJP  II properties)  and  had a  weighted  average net
rentable square foot occupancy  rate of approximately 88%  as of March 31,  1996
and a weighted average annual rent per net rentable square foot of $8.88 for the
quarter ended March 31, 1996. IDS1 was organized on September 29, 1987.
 
    The  following table sets  forth the average occupancy  and average rent per
square foot for IDS1 for  the years ended December 31,  1993, 1994 and 1995  and
the three months ended March 31, 1996.
 
<TABLE>
<CAPTION>
                                                                YEAR ENDED DECEMBER 31,          THREE MONTHS
                                                         -------------------------------------  ENDED MARCH 31,
                                                            1993         1994         1995           1996
                                                         -----------  -----------  -----------  ---------------
<S>                                                      <C>          <C>          <C>          <C>
Average occupancy......................................         90%          90%          90%            88%
Average rent per square foot...........................  $    7.33    $    8.03    $    8.63      $    8.88
</TABLE>
 
    The following table lists selected information regarding the storage centers
for IDS1.
<TABLE>
<CAPTION>
                                                                                                            OCCUPANCY AT
                                                                                                        --------------------
                                                                             NET RENTABLE
                                                                             SQUARE FEET                      DEC. 31,
                                                                    YEAR     AT DEC. 31,                --------------------
PROPERTY NAME                  PROPERTY LOCATION    OWNED SINCE    BUILT         1995        ACREAGE      1993       1994
- ----------------------------  --------------------  -----------  ----------  ------------  -----------  ---------  ---------
<S>                           <C>                   <C>          <C>         <C>           <C>          <C>        <C>
South Military Hwy..........  Virginia Beach, VA          1988      1984          48,000          2.7           *          *
Midlothian Turnpike.........  Richmond, VA                1988      1984          44,000          2.9           *          *
Burke.......................  Fairfax, VA                 1988      1984          32,000          1.7           *          *
Margate.....................  Margate, FL                 1988    1984/86         75,000          4.0          92         92
Walnut......................  Walnut, CA                  1988      1986          96,000          3.6          83         82
Ontario.....................  Ontario, CA                 1988      1984          57,000          2.1           *          *
Morgan Falls................  Dunwoody, GA                1988      1990          76,000          3.7          95         95
Factoria Square.............  Bellevue, WA                1990      1989          70,000          1.9          95         96
Canton **...................  Canton, MI                  1988      1986          58,000          3.3           *          *
Fraser **...................  Fraser, MI                  1988      1985          73,000          5.2           *          *
Livonia **..................  Livonia, MI                 1988      1985          67,000          4.8           *          *
Warren **...................  Warren, MI                  1988      1985          68,000          4.6           *          *
                                                                             ------------         ---
Total.......................                                                     764,000         40.5
                                                                             ------------         ---
                                                                             ------------         ---
 
<CAPTION>
                                          MAR. 31,
                                         -----------
PROPERTY NAME                   1995        1996
- ----------------------------  ---------  -----------
<S>                           <C>        <C>
South Military Hwy..........          *           *
Midlothian Turnpike.........          *           *
Burke.......................          *           *
Margate.....................         89          88
Walnut......................         78          77
Ontario.....................          *           *
Morgan Falls................         93          93
Factoria Square.............         97          98
Canton **...................          *           *
Fraser **...................          *           *
Livonia **..................          *           *
Warren **...................          *           *
Total.......................
</TABLE>
 
- ------------------------------
   * These properties are individually less than 10% of historical cost of total
     properties  of IDS1 and SJP II. The  average occupancy of these projects at
     December 31, 1993, 1994 and 1995, and March 31, 1996 was 86%, 87%, 89%  and
     89%, respectively.
 
  ** Property  owned by SJP II in which IDS1  has a 70% interest and the Company
     has a 30% interest. Net rentable square feet is the total for the property.
 
                                       89
<PAGE>
SELECTED FINANCIAL INFORMATION
 
    The following selected  consolidated financial information  is derived  from
the  historical consolidated  financial statements  of IDS1.  Selected unaudited
consolidated financial data for the three  months ended March 31, 1995 and  1996
include all adjustments (consisting only of normal recurring accruals) that IDS1
considers  necessary for a  fair presentation of  consolidated operating results
for such interim periods.  Results for the interim  periods are not  necessarily
indicative  of results for the full year. The consolidated financial information
set forth below should be read in conjunction with IDS1's consolidated financial
statements,  related  notes   and  other   consolidated  financial   information
incorporated by reference in this Proxy Statement/Prospectus.
 
                    IDS/SHURGARD INCOME GROWTH PARTNERS L.P.
 
<TABLE>
<CAPTION>
                                                                                                   THREE MONTHS ENDED
                                                          YEAR ENDED DECEMBER 31,                      MARCH 31,
                                           -----------------------------------------------------  --------------------
(IN THOUSANDS, EXCEPT PER UNIT DATA)         1991       1992       1993       1994       1995       1995       1996
                                           ---------  ---------  ---------  ---------  ---------  ---------  ---------
<S>                                        <C>        <C>        <C>        <C>        <C>        <C>        <C>
OPERATING DATA:
Rental revenue...........................  $   4,154  $   4,853  $   5,463  $   5,996  $   6,465  $   1,541  $   1,622
Interest and other income................         20         24         29         60        107         22         10
Earnings.................................        867      1,488      1,821      2,224      2,503        535        634
Earnings per Unit (1)....................       5.56       9.54      11.67      14.25      16.04       3.43       4.06
Distributions to Unitholders.............      2,223      2,223      2,246      2,524      2,848        694        718
Distributions per Unit (1)...............      15.00      15.00      15.16      17.03      19.22       4.69       4.84
OTHER DATA:
Funds from operations (2)................  $   2,034  $   2,469  $   2,825  $   3,233  $   3,500  $     791  $     868
</TABLE>
 
<TABLE>
<CAPTION>
                                                            DECEMBER 31,
                                        -----------------------------------------------------    MARCH 31,
                                          1991       1992       1993       1994       1995          1996
                                        ---------  ---------  ---------  ---------  ---------  --------------
<S>                                     <C>        <C>        <C>        <C>        <C>        <C>
BALANCE SHEET DATA:
Total assets..........................  $  32,419  $  32,943  $  32,278  $  31,948  $  29,739    $   29,603
Note payable..........................     --          1,537      1,496      1,451     --            --
Partners' equity......................     29,216     28,365     27,821     27,388     26,892        26,771
</TABLE>
 
- ------------------------------
(1)  Earnings  per Unit  and distributions  per Unit  are based  on earnings and
     distributions, respectively, allocated to  IDS1 Unitholders divided by  the
     number  of IDS1 Units outstanding  during the period (approximately 148,202
     IDS1 Units for all periods shown).
 
(2)  IDS1 defines FFO as  net income before  extraordinary items (determined  in
     accordance  with GAAP), plus depreciation  and amortization related to real
     estate activities, plus or minus certain nonrecurring revenue and expenses.
     FFO is used by many financial analysts in evaluating REITs. FFO should  not
     be  considered as  an alternative to  net income  (determined in accordance
     with GAAP), as an indication of  IDS1's financial performance or cash  from
     operating  activities (determined in accordance with  GAAP) or as a measure
     of liquidity, nor is it necessarily  indicative of sufficient cash flow  to
     fund all of IDS1's needs.
 
                                       90
<PAGE>
MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
OPERATIONS
 
RESULTS OF OPERATIONS - THREE MONTHS ENDED MARCH 31, 1996 AND 1995.
 
    REVENUES.   IDS1's performance continued to improve with earnings up $99,000
or 19% in the first quarter of 1996 compared to the same quarter of 1995. Rental
revenue in turn  increased $81,200 or  5% due to  a 6% increase  in the  average
rental  rate per square foot and  stable occupancies throughout IDS1. The Morgan
Falls, Ontario and Midlothian Turnpike  storage centers contributed the  largest
revenue  gains for the quarter of $23,000, $10,000 and $9,000, respectively. SJP
II, a partnership in which IDS1 owns  a 70% interest, had $33,000 in  additional
rental  revenue compared to last year. The Canton and Warren storage centers had
the  largest  revenue  contributions  for   SJP  II  of  $13,300  and   $12,600,
respectively. Occupancies remained stable at an average of 89% at March 31, 1996
compared to 88% at March 31, 1995.
 
    EXPENSES.   In the first  quarter of 1996, expenses  decreased 4% or $40,000
compared to the same quarter  of 1995. The majority of  this decrease is due  to
the  elimination of  interest expense resulting  from the payoff  of IDS1's bank
note in December  1995. Additionally, depreciation  expense declined as  certain
assets became fully depreciated; this decrease does not affect IDS1's cash flow.
Operating and administrative expenses, however, increased 2% over 1995 primarily
due  to the increased cost in snow removal  at the Warren storage center as well
as an overall increase in advertising expense at all of IDS1's storage centers.
 
RESULTS OF OPERATIONS - YEARS ENDED DECEMBER 31, 1995, 1994 AND 1993.
 
    REVENUES.  IDS1's  performance increased  in 1995 and  1994 as  a result  of
significant  increases in revenue  and earnings. Earnings rose  13% from 1994 to
1995 and 22% from 1993 to 1994. Rental revenue also rose $469,000 in 1995  after
a  $533,000 increase  in 1994.  The 1995  revenue increase  was due  to a slight
increase in average  occupancies and a  7.5% increase in  average rental  rates.
Additionally,  all the  SJP II stores,  in which  IDS1 owns a  70% interest, had
significant revenue gains, with  1995 averaging 13.7%  over 1994. Revenue  gains
from  1993 to 1994  were primarily the  result of stable  occupancies and a 9.5%
increase in  average rental  rates. Average  occupancy has  increased  slightly,
averaging  88% at December 31,  1993 and 1994 to 89%  at December 31, 1995. IDS1
seeks to maximize  revenue by adjusting  rents to match  demand. Store  managers
evaluate their store's rental rates, based on unit demand, unit availability and
competitors'   rental  rates.  IDS1   trains  its  store   managers  in  revenue
optimization and empowers them  to adjust marginal rental  rates based on  their
"on  the ground" analysis of demand  and availability at their particular store.
In addition, the use of month-to-month leases, combined with customer  turnover,
allows  rents  to be  quickly adjusted  to  match current  demand in  a flexible
manner.
 
    EXPENSES.   Operating expenses  increased $110,000  in 1995  and $58,000  in
1994. The majority of the 1995 increase was due to the increased personnel costs
resulting  from additional hours worked by  managers, an increase in landscaping
expense during the  spring and summer  months at the  Canton, Fraser and  Warren
storage  centers, and repairs made to the  air conditioning units at the Margate
storage center.  In 1994,  operating expenses  increased due  to higher  utility
usage  from a  colder than  normal winter in  the South,  additional phone lines
installed for modem communications, and increased repair and maintenance at  the
Livonia and Morgan Falls storage centers due to snow removal and landscaping.
 
    Interest  expense increased $33,000 in 1995  after remaining stable in 1994.
The majority of the change in 1995  reflects the rise in the interest rate  from
7.75% at December 1994 to 9.25% at December 1995.
 
    Real  estate taxes decreased $25,000 in 1995  after an $11,300 drop in 1994.
The 1995 decrease was due to tax refunds received as a result of successful real
estate tax appeals for the Fraser, Margate and Ontario storage centers. The 1994
decrease was largely due to levy decreases in the Michigan districts. IDS1  does
not expect to be able to continue to decrease real estate taxes in the future.
 
                                       91
<PAGE>
    Administrative  expenses rose  $36,000 in  1995 after  a slight  increase in
1994. The 1995 increase is primarily due  to the increase in printing costs  for
IDS1's quarterly and annual reports.
 
LIQUIDITY AND CAPITAL RESOURCES - THREE MONTHS ENDED MARCH 31, 1996 AND 1995.
 
    TRANSACTION  COSTS.  IDS1  continues to investigate  various alternatives to
provide the limited partners with greater liquidity. During the first quarter of
1996, costs  incurred  by IDS1  in  exploring various  alternative  transactions
totaled  approximately  $91,000.  Whether  and when  IDS1  will  reach agreement
regarding the implementation of any of the various alternatives will depend on a
number of factors. There can be no assurance that any agreement will be  reached
or, if reached, that the transactions contemplated thereby will be consummated.
 
    DISTRIBUTIONS  TO PARTNERS.  The average  annual distribution rate was 7.75%
for the three months ended March 31, 1996 and 1995.
 
LIQUIDITY AND CAPITAL RESOURCES - YEARS ENDED DECEMBER 31, 1995, 1994 AND 1993.
 
    CASH FROM OPERATIONS.  Cash from operations increased by $338,800 from  1993
to  1994 and $408,500  from 1994 to  1995, reflecting the  increase in earnings.
Management believes that  cash balances and  cash flow from  operations will  be
adequate to support the future operating needs of IDS1.
 
    INVESTING  ACTIVITIES.   Investments in  storage centers  have been $99,000,
$137,000, and $119,000 during 1995, 1994 and 1993, respectively. The majority of
improvements in 1995 included  building improvements at  the Ontario and  Canton
storage  centers as well as  pavement upgrades at the  Warren and Canton storage
centers. Improvements completed during 1994 were security upgrades at the  South
Military  Highway, Walnut and  Ontario storage centers and  pavement work at the
Canton and Warren storage centers. In  1993, investments were for pavement  work
at  the  Canton  and  Livonia  storage centers  and  security  equipment  at the
Midlothian  Turnpike  storage  center.  Planned  improvements  for  1996   total
approximately  $63,300 and  are expected to  be funded from  operations and cash
reserves.
 
    FINANCING ACTIVITIES.  On December 6, 1995, IDS1 repaid its seven-year  note
payable  to a bank  of $1,418,201 with cash  accumulated from operations. During
1995, 1994 and 1993, IDS1 had made  principal payments on this note of  $33,000,
$45,000, and $41,000, respectively. IDS1 now has no outstanding long-term debt.
 
    DISTRIBUTIONS  TO  PARTNERS.   The  average annual  distribution  rates were
7.69%, 6.81% and 6.06% for 1995, 1994 and 1993, respectively. Distributions  are
expected  to  continue  on a  quarterly  basis  and will  reflect  IDS1's future
operating results and cash position.
 
                                       92
<PAGE>
IDS2
 
PROPERTY INFORMATION
 
    IDS2  owns  and  operates  eight   self  storage  properties.  These   eight
properties,  which are located  in five states,  contained approximately 538,000
net rentable square  feet and had  a weighted average  net rentable square  foot
occupancy  rate of approximately 86% as of March 31, 1996 and a weighted average
annual rent per net rentable  square foot of $8.88  for the quarter ended  March
31, 1996. IDS2 was organized on November 15, 1988.
 
    The  following table sets  forth the average occupancy  and average rent per
square foot for IDS2 for  the years ended December 31,  1993, 1994 and 1995  and
the three months ended March 31, 1996.
 
<TABLE>
<CAPTION>
                                                                YEAR ENDED DECEMBER 31,          THREE MONTHS
                                                         -------------------------------------  ENDED MARCH 31,
                                                            1993         1994         1995           1996
                                                         -----------  -----------  -----------  ---------------
<S>                                                      <C>          <C>          <C>          <C>
Average occupancy......................................         87%          91%          88%            86%
Average rent per square foot...........................  $    7.78    $    8.08    $    8.59      $    8.88
</TABLE>
 
    The following table lists selected information regarding the storage centers
for IDS2.
<TABLE>
<CAPTION>
                                                                                                             OCCUPANCY AT
                                                                                                         --------------------
                                                                              NET RENTABLE
                                                                              SQUARE FEET                      DEC. 31,
                                                                     YEAR     AT DEC. 31,                --------------------
PROPERTY NAME                    PROPERTY LOCATION    OWNED SINCE    BUILT        1995        ACREAGE      1993       1994
- ------------------------------  --------------------  -----------  ---------  ------------  -----------  ---------  ---------
<S>                             <C>                   <C>          <C>        <C>           <C>          <C>        <C>
Orange........................  Orange, CA                  1989     1985          90,000          2.8          91         92
Sterling Heights..............  Sterling Heights, MI        1988     1986         105,000          8.9          95         88
Newport News North............  Newport News, VA            1989     1986          59,000          3.8           *          *
Chesapeake....................  Chesapeake, VA              1989    1986/95        58,000          5.2           *          *
Leesburg......................  Leesburg, VA                1989     1986          28,000          1.6           *          *
T.C. Jester...................  Houston, TX                 1990     1990          64,000          2.8          92         92
Bellefield....................  Bellevue, WA                1990    1978/86        67,000          2.9          92         93
Kennydale.....................  Renton, WA                  1991     1991          67,000          2.8          91         91
                                                                              ------------         ---
Total.........................                                                    538,000         30.8
                                                                              ------------         ---
                                                                              ------------         ---
 
<CAPTION>
                                            MAR. 31,
                                           -----------
PROPERTY NAME                     1995        1996
- ------------------------------  ---------  -----------
<S>                             <C>        <C>
Orange........................         86          86
Sterling Heights..............         80          84
Newport News North............          *           *
Chesapeake....................          *           *
Leesburg......................          *           *
T.C. Jester...................         87          85
Bellefield....................         93          93
Kennydale.....................         87          88
Total.........................
</TABLE>
 
- ------------------------------
   * These properties are individually less than 10% of historical cost of total
     properties  for IDS2. The  average occupancy of  these projects at December
     31, 1993, 1994  and 1995, and  March 31, 1996  was 88%, 87%,  88% and  87%,
     respectively.
 
                                       93
<PAGE>
SELECTED FINANCIAL INFORMATION
 
    The  following selected financial information is derived from the historical
financial statements of IDS2.  Selected unaudited financial  data for the  three
months ended March 31, 1995 and 1996 include all adjustments (consisting only of
normal recurring accruals) that IDS2 considers necessary for a fair presentation
of  operating results for such interim  periods. Results for the interim periods
are not  necessarily indicative  of results  for the  full year.  The  financial
information  set forth below should be read in conjunction with IDS2's financial
statements, related  notes  and  other  financial  information  incorporated  by
reference in this Proxy Statement/Prospectus.
 
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. II
 
<TABLE>
<CAPTION>
                                                                                                   THREE MONTHS ENDED
                                                          YEAR ENDED DECEMBER 31,                      MARCH 31,
                                           -----------------------------------------------------  --------------------
(IN THOUSANDS, EXCEPT PER UNIT DATA)         1991       1992       1993       1994       1995       1995       1996
                                           ---------  ---------  ---------  ---------  ---------  ---------  ---------
<S>                                        <C>        <C>        <C>        <C>        <C>        <C>        <C>
OPERATING DATA:
Rental revenue...........................  $   2,277  $   3,240  $   3,618  $   4,038  $   4,309  $   1,014  $   1,093
Interest and other income................        104          7          4         20         11          2          5
Earnings.................................      1,134        968      1,094      1,340      1,461        295        346
Earnings per Unit (1)....................       9.36       7.99       9.03      11.06      12.06       2.44       2.85
Distributions to Unitholders.............      1,799      1,799      1,799      1,817      1,871        468        468
Distributions per Unit (1)...............      15.62      15.62      15.62      15.78      16.25       4.06       4.06
OTHER DATA:
Funds from operations (2)................  $   1,813  $   1,836  $   1,983  $   2,234  $   2,369  $     502  $     560
</TABLE>
 
<TABLE>
<CAPTION>
                                                                DECEMBER 31,
                                            -----------------------------------------------------   MARCH 31,
                                              1991       1992       1993       1994       1995        1996
                                            ---------  ---------  ---------  ---------  ---------  -----------
<S>                                         <C>        <C>        <C>        <C>        <C>        <C>
BALANCE SHEET DATA:
Total assets..............................  $  26,372  $  26,124  $  26,322  $  25,866  $  25,685   $  25,402
Notes payable.............................      1,240      1,794      3,005      2,938      3,338       3,320
Partners' equity..........................     24,763     23,838     23,039     22,467     21,959      21,812
</TABLE>
 
- ------------------------------
(1)  Earnings  per Unit  and distributions  per Unit  are based  on earnings and
     distributions, respectively, allocated to  IDS2 Unitholders divided by  the
     number  of IDS2 Units outstanding  during the period (approximately 115,110
     IDS2 Units for all periods shown).
 
(2)  IDS2 defines FFO as  net income before  extraordinary items (determined  in
     accordance  with GAAP), plus depreciation  and amortization related to real
     estate activities, plus or minus certain nonrecurring revenue and expenses.
     FFO is used by many financial analysts in evaluating REITs. FFO should  not
     be  considered as  an alternative to  net income  (determined in accordance
     with GAAP), as an indication of  IDS2's financial performance or cash  from
     operating  activities (determined in accordance with  GAAP) or as a measure
     of liquidity, nor is it necessarily  indicative of sufficient cash flow  to
     fund all of IDS2's needs.
 
                                       94
<PAGE>
MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
OPERATIONS
 
RESULTS OF OPERATIONS - THREE MONTHS ENDED MARCH 31, 1996 AND 1995.
 
    REVENUES.   IDS2's performance continued to improve with earnings up $50,400
or 17% over the same quarter of 1995. Rental revenue increased $79,000 or 8%  in
the  first quarter of  1996 compared to  the corresponding quarter  of 1995. The
increase resulted primarily from  a 6% increase in  the average rental rate  per
square  foot as well as the increase  in revenue from storage center expansions.
The Kennydale, Newport News North  and Leesburg storage centers contributed  the
largest  revenue gains  in IDS2 of  $25,800, $15,600  and $12,500, respectively.
Occupancies decreased two percentage points from 89% at March 31, 1995 to 87% at
March 31, 1996.
 
    EXPENSES.   Total expenses  rose 4%  for the  quarter compared  to the  same
quarter  of 1995.  Operating and administrative  expenses increased  6% over the
first quarter of 1995.  The majority of this  increase resulted from  additional
hours worked by the store managers and increased salaries. Interest expense also
rose  7% due to the  additional borrowings on IDS2's  line of credit since March
31, 1995.
 
RESULTS OF OPERATIONS - YEARS ENDED DECEMBER 31, 1995, 1994 AND 1993.
 
    REVENUES.  IDS2's  rental revenue  rose $271,000  and $420,000  in 1995  and
1994,  respectively. These  increases resulted  primarily from  the rise  in the
average rental rate per square foot from $7.78 in 1993 to $8.08 in 1994 to $8.59
in 1995 as well as  storage center expansions. Additionally, earnings  increased
$120,000  in 1995 and $246,000 in 1994.  The average occupancy for all of IDS2's
storage centers  was 87%,  90% and  91% at  December 31,  1995, 1994  and  1993,
respectively. Although the average occupancy for IDS2 decreased three percentage
points  during 1995,  total revenue  increased as  a result  of IDS2  seeking to
maximize revenue by  adjusting rents  to match demand.  Store managers  evaluate
their  store's  rental  rates,  based  on  unit  demand,  unit  availability and
competitors'  rental  rates.   IDS2  trains  its   store  managers  in   revenue
optimization  and empowers them  to adjust marginal rental  rates based on their
"on the ground" analysis of demand  and availability at their particular  store.
In  addition, the use of month-to-month leases, combined with customer turnover,
allows rents  to be  quickly adjusted  to  match current  demand in  a  flexible
manner.
 
    EXPENSES.   Operating  expenses increased $68,000  in 1995  after an $89,000
increase in 1994. Operating  expenses for 1995 rose  primarily due to  increased
hours  worked  by store  managers, higher  postage  and supply  costs, increased
payout of tenant  claims and foreclosure  expenses and the  increase in  utility
expense  at the Chesapeake storage center due to the new expansion. Increases in
1994 were primarily  attributable to repair  and maintenance costs  for the  air
conditioning  unit  at  T.C. Jester  and  higher salary  cost  throughout IDS2's
storage centers.
 
    Real estate taxes decreased each year from 1993 to 1995. The slight decrease
in 1995 was due to a tax refund  received in 1995 as a result of the  successful
real  estate tax appeal  of the Sterling Heights  storage center's 1994 assessed
value. The decrease in real  estate taxes in 1994  was accredited to winning  an
appeal  for Kennydale's 1993  and 1994 assessed  value. The refund  due for 1993
taxes was offset against the taxes due in 1994. IDS2 does not expect to be  able
to continue to decrease real estate taxes in the future.
 
    Additionally,  interest expense rose  $16,000 and $72,000  in 1995 and 1994,
respectively. The increase in  1995 was due to  additional borrowings on  IDS2's
line  of credit to fund  the Chesapeake expansion as well  as the slight rise in
interest rates from 8.125% at December 31, 1994 to 8.5% at December 31, 1995  on
the  commercial bank note totaling  $1,200,000. The increase in  1994 was due to
IDS2 borrowing on its line  of credit to finance  the expansion of Newport  News
North, which was subsequently refinanced.
 
    Administrative  expenses rose  $29,000 in  1995 after  a slight  increase in
1994. The 1995 increase was primarily due to the increase in printing costs  for
IDS2's quarterly and annual reports.
 
                                       95
<PAGE>
LIQUIDITY AND CAPITAL RESOURCES - THREE MONTHS ENDED MARCH 31, 1996 AND 1995.
 
    TRANSACTION  COSTS.  IDS2  continues to investigate  various alternatives to
provide the limited partners with greater liquidity. During the first quarter of
1996, costs  incurred  by IDS2  in  exploring various  alternative  transactions
totaled  approximately  $61,000.  Whether  and when  IDS2  will  reach agreement
regarding the implementation of any of the various alternatives will depend on a
number of factors. There can be no assurance that any agreement will be  reached
or, if reached, that the transactions contemplated thereby will be consummated.
 
    INVESTING ACTIVITIES.  IDS2 invested approximately $475,000 during the first
quarter of 1995 to expand the Chesapeake center.
 
    FINANCING  ACTIVITIES.  During the March 1995 quarter, IDS2 drew $185,000 on
their $1,500,000 line of credit in order to fund the Chesapeake buildout. On May
1,  1995  IDS2  converted  the  $1,500,000   line  of  credit  to  an   $850,000
non-revolving line of credit, maturing May 1, 1997.
 
    DISTRIBUTIONS  TO PARTNERS.   The annualized distribution  rate was 6.5% for
the three months ended March 31, 1996 and 1995.
 
LIQUIDITY AND CAPITAL RESOURCES - YEARS ENDED DECEMBER 31, 1995, 1994 AND 1993.
 
    CASH FROM OPERATIONS.  Cash from operations increased by $460,800 from  1993
to  1994 and $289,500  from 1994 to  1995, reflecting the  increase in earnings.
These fluctuations reflect changes in earnings adjusted by the timing of certain
expense payments and payments due  to affiliates. Management believes that  cash
balances  and cash flow from  operations will be adequate  to support the future
operating needs of IDS2.
 
    INVESTING ACTIVITIES.   During  1994 and  1995 IDS2  invested  approximately
$1,200,000  to expand the  Chesapeake storage center.  This project entailed the
construction of two, one-story buildings adding approximately 26,000 square feet
of storage space, as well  as the addition of 2,400  square feet of RV  parking.
The  new  expansion opened  the beginning  of  April 1995  and is  currently 76%
occupied. The  expenditures during  1994  and 1995  were primarily  funded  from
operating  cash flow and cash reserves; the remaining costs were funded from the
line of  credit.  The  expansion  of  IDS2's  existing  facilities  provides  an
opportunity  to  increase revenue  without a  significant increase  in operating
costs. In 1993 IDS2 completed the expansion  at Newport News North at a cost  of
$763,000.  This expansion added 26,000 square feet to the existing 33,000 square
feet of  storage. The  additional  space includes  both climate  controlled  and
non-climate controlled units.
 
    Additionally,  investments  in  the  remaining  storage  centers  have  been
$69,000, $51,000 and  $47,000 in  1995, 1994  and 1993,  respectively. In  1995,
investments  included  pavement  work  at the  Sterling  Heights  and Bellefield
storage centers as well as security  upgrades at the Orange storage center.  The
majority  of  improvement  in 1994  were  security  upgrades at  the  Orange and
Sterling Heights storage centers. During 1993 improvements included new pavement
at the Bellefield  and Sterling  Heights storage centers  as well  as new  doors
installed  at the  Orange storage  center. Planned  improvements for  1996 total
approximately $91,000 and are expected to be funded from operations of IDS2.
 
    FINANCING  ACTIVITIES.    On  May   1,  1995,  IDS2  obtained  an   $850,000
non-revolving  line of credit with interest rate of prime plus one half percent,
maturing May 1, 1997. During 1995, IDS2  drew $470,000 on the line of credit  in
order  to fund the  Chesapeake expansion. IDS2  intends to pay  off or refinance
this line  of  credit  from  operating  cash  flow  over  the  next  two  years.
Additionally,  in  1994, IDS2  converted its  $1,250,000 line  of credit  into a
seven-year note which will mature in March 2001.
 
    DISTRIBUTIONS TO PARTNERS.  Annualized  distribution rates were 6.5%,  6.31%
and  6.25% for 1995, 1994 and  1993, respectively. Distributions are expected to
continue on a quarterly basis and  will reflect IDS2's future operating  results
and cash position.
 
                                       96
<PAGE>
IDS3
 
PROPERTY INFORMATION
 
    IDS3  owns and operates 16 self  storage properties and one office building.
These 17 properties, which are located in seven states, contained  approximately
1,000,000  net  rentable square  feet and  had a  weighted average  net rentable
square foot occupancy  rate of  approximately 87%  as of  March 31,  1996 and  a
weighted  average annual  rent per  net rentable  square foot  of $7.92  for the
quarter ended March 31, 1996. IDS3 was organized on November 15, 1988.
 
    The following table sets  forth the average occupancy  and average rent  per
square  foot for ISD3 for  the years ended December 31,  1993, 1994 and 1995 and
the three months ended March 31, 1996.
 
<TABLE>
<CAPTION>
                                                                YEAR ENDED DECEMBER 31,          THREE MONTHS
                                                         -------------------------------------  ENDED MARCH 31,
                                                            1993         1994         1995           1996
                                                         -----------  -----------  -----------  ---------------
<S>                                                      <C>          <C>          <C>          <C>
Average occupancy......................................         90%          92%          89%            87%
Average rent per square foot...........................  $    5.79    $    6.72    $    7.45      $    7.92
</TABLE>
 
    The following table lists selected information regarding the storage centers
for IDS3.
<TABLE>
<CAPTION>
                                                                                                             OCCUPANCY AT
                                                                                                         --------------------
                                                                              NET RENTABLE
                                                                              SQUARE FEET                      DEC. 31,
                                                                     YEAR     AT DEC. 31,                --------------------
PROPERTY NAME                    PROPERTY LOCATION    OWNED SINCE    BUILT        1995        ACREAGE      1993       1994
- ------------------------------  --------------------  -----------  ---------  ------------  -----------  ---------  ---------
<S>                             <C>                   <C>          <C>        <C>           <C>          <C>        <C>
Gilbert.......................  Gilbert, AZ                 1991     1985          66,000          4.0           *          *
Delray Beach..................  Delray Beach, FL            1991     1986          77,000          4.5           *          *
Allen Blvd....................  Beaverton, OR               1991    1973/75        42,000          2.6           *          *
Windcrest.....................  San Antonio, TX             1991    1975/93        86,000          6.5           *          *
Dobson Ranch..................  Mesa, AZ                    1992     1978          55,000          4.2           *          *
Norcross......................  Norcross, GA                1992     1984          62,000          9.3           *          *
Stone Mountain................  Stone Mountain, GA          1992     1995          61,000         10.1           *          *
Tucker........................  Tucker, GA                  1992     1987          60,000          4.6           *          *
Forest Park...................  Forest Park, GA             1992     1980          65,000          7.9           *          *
Rochester.....................  Utica, MI                   1992     1989          57,000          4.8           *          *
Castro Valley.................  Castro Valley, CA           1993    1975/88        69,000          2.8          96         95
Newark........................  Newark, CA                  1993     1991          61,000          3.1           *          *
San Leandro...................  San Leandro, CA             1993     1991          59,000          2.7           *          *
Tracy.........................  Tracy, CA                   1993     1986          70,000          3.0           *          *
Sacramento....................  Sacramento, CA              1994     1991          53,000          2.6         N/A          *
San Lorenzo...................  San Lorenzo, CA             1994     1990          54,000          1.9         N/A          *
Castro Valley Office
 Building.....................  Castro Valley, CA           1994     1989           3,000          0.3         N/A          *
                                                                              ------------         ---
Total.........................                                                  1,000,000         74.7
                                                                              ------------         ---
                                                                              ------------         ---
 
<CAPTION>
                                            MAR. 31,
                                           -----------
PROPERTY NAME                     1995        1996
- ------------------------------  ---------  -----------
<S>                             <C>        <C>
Gilbert.......................          *           *
Delray Beach..................          *           *
Allen Blvd....................          *           *
Windcrest.....................          *           *
Dobson Ranch..................          *           *
Norcross......................          *           *
Stone Mountain................          *           *
Tucker........................          *           *
Forest Park...................          *           *
Rochester.....................          *           *
Castro Valley.................         91          93
Newark........................          *           *
San Leandro...................          *           *
Tracy.........................          *           *
Sacramento....................          *           *
San Lorenzo...................          *           *
Castro Valley Office
 Building.....................          *           *
Total.........................
</TABLE>
 
- ------------------------------
   * These properties are individually less than 10% of historical cost of total
     properties for IDS3. The  average occupancy of  these projects at  December
     31,  1993, 1994  and 1995, and  March 31, 1996  was 93%, 92%,  87% and 87%,
     respectively.
 
                                       97
<PAGE>
SELECTED FINANCIAL INFORMATION
 
    The following selected financial information is derived from the  historical
financial  statements of IDS3.  Selected unaudited financial  data for the three
months ended March 31, 1995 and 1996 include all adjustments (consisting only of
normal recurring accruals) that IDS3 considers necessary for a fair presentation
of operating results for such interim  periods. Results for the interim  periods
are  not  necessarily indicative  of results  for the  full year.  The financial
information set forth below should be read in conjunction with IDS3's  financial
statements,  related  notes  and  other  financial  information  incorporated by
reference in this Proxy Statement/Prospectus.
 
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. III
 
<TABLE>
<CAPTION>
                                                                                                   THREE MONTHS ENDED
                                                          YEAR ENDED DECEMBER 31,                      MARCH 31,
                                           -----------------------------------------------------  --------------------
(IN THOUSANDS, EXCEPT PER UNIT DATA)         1991       1992       1993       1994       1995       1995       1996
                                           ---------  ---------  ---------  ---------  ---------  ---------  ---------
<S>                                        <C>        <C>        <C>        <C>        <C>        <C>        <C>
OPERATING DATA:
Rental revenue...........................  $     355  $   2,573  $   4,110  $   6,609  $   7,225  $   1,720  $   1,807
Interest and other income................        584        333        230         57         36          7          9
Earnings.................................        607      1,065      1,427      1,655      1,885        386        532
Earnings per Unit (1)....................       9.76       8.98      11.37      13.19      15.02       3.08       4.24
Distributions to Unitholders.............        685      1,556      1,825      2,124      2,235        559        559
Distributions per Unit (1)...............      11.59      13.80      15.31      17.81      18.75       4.69       4.69
OTHER DATA:
Funds from operations (2)................        672      1,532      2,219      2,441      2,685        655        801
</TABLE>
 
<TABLE>
<CAPTION>
                                                            DECEMBER 31,
                                        -----------------------------------------------------
                                          1991       1992       1993       1994       1995     MARCH 31, 1996
                                        ---------  ---------  ---------  ---------  ---------  --------------
<S>                                     <C>        <C>        <C>        <C>        <C>        <C>
BALANCE SHEET DATA:
Total assets..........................  $  20,320  $  26,271  $  36,726  $  36,930  $  35,636    $   35,164
Notes payable.........................     --         --         10,821     11,620     10,746        10,384
Partners' equity......................     19,957     25,956     25,462     24,882     24,414        24,357
</TABLE>
 
- ------------------------------
(1)  Earnings per Unit  and distributions  per Unit  are based  on earnings  and
     distributions,  respectively, allocated to IDS3  Unitholders divided by the
     number of IDS3 Units outstanding  during the period (approximately  119,215
     IDS3 Units for all periods shown).
 
(2)  IDS3  defines FFO as  net income before  extraordinary items (determined in
     accordance with GAAP), plus depreciation  and amortization related to  real
     estate activities, plus or minus certain nonrecurring revenue and expenses.
     FFO  is used by many financial analysts in evaluating REITs. FFO should not
     be considered as  an alternative  to net income  (determined in  accordance
     with  GAAP), as an indication of  IDS3's financial performance or cash from
     operating activities (determined in accordance  with GAAP) or as a  measure
     of  liquidity, nor is it necessarily  indicative of sufficient cash flow to
     fund all of IDS3's needs.
 
                                       98
<PAGE>
MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
OPERATIONS
 
RESULTS OF OPERATIONS - THREE MONTHS ENDED MARCH 31, 1996 AND 1995.
    REVENUES.  IDS3's performance continued to improve with earnings up $145,000
or 38% over the same quarter of 1995. Rental revenue increased $86,000 or 5%  in
the  first quarter of  1996 compared to  the corresponding quarter  of 1995. The
increase resulted primarily from a 10%  increase in the average rental rate  per
square  foot.  The  Stone  Mountain, Tracy  and  Castro  Valley  storage centers
contributed the largest revenue  gain in IDS3 of  $21,300, $19,500 and  $18,300,
respectively.  During the month of  March 1996 IDS3 lost  its only tenant in the
Castro Valley office  building representing  approximately $5,000  per month  in
rent.  Management is currently making efforts to fill the office space; however,
it has impacted average occupancies at quarter end. Occupancies decreased  eight
percentage points from 89% at March 31, 1995 to 81% at March 31, 1996.
 
    EXPENSES.  Total expenses decreased 4% for the first quarter compared to the
same  quarter of  1995. The  majority of this  decrease was  due to  the drop in
amortization expense  which  does not  affect  IDS3's cash  flow.  Additionally,
interest expense decreased as a result of the final payment on the seller's note
which  originated  with  the  purchase  of  the  Castro  Valley  storage center.
Operating and administrative expenses increased 2% over the same quarter of 1995
due to  additional  hours worked  by  the store  mangers  as well  as  increased
salaries.  Real estate taxes increased 7% over the same quarter of 1995 due to a
refund received in March  1995 for the successful  appeal of San Lorenzo's  1994
real estate taxes.
 
RESULTS OF OPERATIONS - YEARS ENDED DECEMBER 31, 1995, 1994 AND 1993.
 
    From  1993 to 1995,  IDS3's revenue and expenses  increased primarily due to
the acquisition of  new storage centers  and the interest  on the  corresponding
debt.   During  this  period,  IDS3  acquired  the  following  storage  centers:
Sacramento and San Lorenzo (February  1994); Castro Valley office building  (May
1994); Castro Valley, Newark, San Leandro and Tracy (August 1993).
 
    IDS3's  rental revenue and earnings from 1994  to 1995 increased 9% and 14%,
respectively, resulting from  a 10.7% increase  in the average  rental rate  per
square  foot. Rate increases  were partially offset by  a decline in occupancies
from 93% at December 31, 1993 to 90% at December 31, 1994 to 88% at December 31,
1995. Although  the  average occupancy  for  IDS3  has decreased,  it  seeks  to
maximize  revenue  by  adjusting  rents to  match  demand  more  flexibly. Store
managers evaluate  their  store's  rental  rates, based  on  unit  demand,  unit
availability  and competitors' rental  rates. IDS3 trains  its store managers in
revenue optimization and empowers them to adjust marginal rental rates based  on
their  "on the ground"  analysis of demand and  availability at their particular
store. In addition,  the use  of month-to-month leases,  combined with  customer
turnover,  allows rents  to be  quickly adjusted  to match  current demand  in a
flexible manner.
 
    Revenue for the  three storage centers  purchased in 1994  increased 20%  or
$156,000  in 1995 over  their 1994 results,  while comparable operating expenses
increased by 5% or $15,000. These combined to provide a 32% or $141,000 increase
in 1995 earnings  for these centers  compared to their  1994 operating  results.
These   increases  resulted  from  the  additional  two  months  of  operations.
Occupancies for  these  three centers,  which  averaged 91%  during  1994,  rose
slightly to an average of 92% during 1995.
 
    Revenue  and operating  expenses for the  four properties  purchased in 1993
rose 161% or $1.3 million and 145% or $415,000 from 1993 to 1994,  respectively.
These  increases  reflect the  additional seven  months  of operations  in 1994.
Additionally, revenue and expenses  increased 8% or $173,000  and 4% or  $26,000
from  1994 to 1995, respectively. This provided an 11% increase in 1995 earnings
for these centers compared  to 1994. Annual occupancies  for these four  centers
averaged 91%, 90% and 91% at December 31, 1993, 1994 and 1995, respectively.
 
    Storage  centers owned prior to 1993 had  increased revenue of 14% from 1993
to 1994 and 8% from 1994 to  1995. Operating expenses for these storage  centers
increased 8% or $126,000 in 1995 over 1994. The majority of this increase is due
to    additional    hours    worked    by    managers,    higher    repair   and
 
                                       99
<PAGE>
maintenance expenses which included retail  renovations at the Tucker  facility,
and  increased store inventory costs. Additionally, operating expenses increased
3% in 1994 over 1993. Annual occupancies for these storage centers averaged  94%
at December 31, 1993, 89% at December 31, 1994, and 85% December 31, 1995.
 
LIQUIDITY AND CAPITAL RESOURCES - THREE MONTHS ENDED MARCH 31, 1996 AND 1995.
 
    IDS3  continues to investigate  various alternatives to  provide the limited
partners with  greater  liquidity.  During  the first  quarter  of  1996,  costs
incurred   by  IDS3  in  exploring   various  alternative  transactions  totaled
approximately $82,000. Whether and when IDS3 will reach agreement regarding  the
implementation  of any of  the various alternatives  will depend on  a number of
factors. There can be  no assurance that  any agreement will  be reached or,  if
reached, that the transactions contemplated thereby will be consummated.
 
    Capital  improvements for the  first quarter of  1996 totaled $38,600, which
represents the conversion of storage units at the Dobson Ranch storage center.
 
    During the first quarter of 1996, IDS3 borrowed $600,000 on its bank note in
order to make  final payment of  $909,653 on the  seller's note that  originated
with  the purchase of the Castro Valley storage center. During the first quarter
of 1995, IDS3 made payments totaling  $378,900 on the seller's notes  pertaining
to  the Castro Valley and Newark storage centers. These payments were funded out
of operating cash flow.
 
    Annualized distribution rates were  7.50% for the  three months ended  March
31, 1996 and 1995.
 
LIQUIDITY AND CAPITAL RESOURCES - YEARS ENDED DECEMBER 31, 1995, 1994 AND 1993.
 
    CASH  FROM OPERATIONS.  Cash from operations increased by $720,300 from 1993
to 1994 and  $337,200 from 1994  to 1995, reflecting  the increase in  earnings.
Management  believes that  cash balances and  cash flow from  operations will be
adequate to support the future operating needs of IDS3.
 
    INVESTING ACTIVITIES.  In 1993,  IDS3 invested $237,000 in existing  storage
centers,  including office  remodeling at  Norcross, Stone  Mountain, Tucker and
Forest Park  and new  signage at  Rochester. IDS3  also purchased  four  storage
centers  during the third quarter of 1993 at a total cost of $13.3 million. IDS3
acquired a security interest in two  additional properties as part of a  binding
purchase  agreement with  the same seller.  These two centers  were purchased on
February 10, 1994, for $5.7 million.  All six California properties are  subject
to  similar  terms under  the purchase  and  sales agreements.  These agreements
provide IDS3 with a 10% return on funds invested for the first three years.  All
of  these storage centers are located  in northern California, San Francisco Bay
and Sacramento areas and they range in  size from 58,000 to 69,000 net  rentable
square feet. Additionally, in March 1994, IDS3 purchased an office building from
the same seller at a total cost of $500,000.
 
    In   1994,  IDS3  invested  $157,000  in  existing  storage  centers.  These
improvements included  new signage  at Castro  Valley, Newark,  San Leandro  and
Tracy. Security improvements were also made at the Gilbert, Dobson Ranch, Castro
Valley,  Newark and Tracy storage centers. As  part of Stone Mountain and Forest
Park's original acquisitions, IDS3 acquired undeveloped land in Atlanta adjacent
to each storage center. IDS3  has listed both parcels  with a local real  estate
broker for resale.
 
    During  1995, IDS3 invested $147,000  in capital improvements which included
pavement work at the Gilbert, Allen Boulevard and Rochester storage centers,  as
well as a new perimeter fence at the Windcrest storage center. Additionally, the
septic  system  at  the  Delray  Beach  storage  center  was  replaced.  Planned
improvements for 1996 total approximately $188,600 and are expected to be funded
from operations and cash reserves.
 
    FINANCING ACTIVITIES.   During  1993,  IDS3 issued  $10,821,000 of  debt  in
conjunction  with the purchase of  the six storage centers  in the San Francisco
area. This debt  was comprised  of an  $8 million  bank note  and $2,821,000  in
seller  notes.  Seller's  notes  require  quarterly  interest  payments  to  the
 
                                      100
<PAGE>
extent any center's  net operating  income, as  defined, exceeds  10% of  IDS3's
investment  in  the related  center. Annual  payments  are due  under conditions
provided in the note agreement based on each center's performance.
 
    During 1994, IDS3 consolidated  existing outstanding notes payable  totaling
$8  million and borrowed an additional $1.5 million. This new note matures April
1, 2001 and bears an interest rate of 8% until September 1, 1996, at which  time
it reprices and can be fixed for various periods at IDS3's option. Cash proceeds
from  the additional  borrowing under  this note were  used to  make $580,000 in
payments on the  seller's notes  taken in 1993  and fund  the $500,000  purchase
price  of the Castro Valley office building. The terms of this note provide IDS3
the option to borrow  up to an  additional $3 million. It  may be necessary  for
IDS3  to borrow under this provision to meet the future repayment obligations of
the seller's notes to the extent they cannot be funded from operating cash flow.
In 1994, IDS3 made  the final payments  of $651,000 on  the seller's notes  that
originated with the purchase of the Tracy and San Leandro storage centers.
 
    In  1995, IDS3 made a $65,347 payment  on the seller's note which originated
with the purchase of the Castro Valley  storage center as well as final  payment
of  $615,000 on  the seller's  note which  originated with  the purchase  of the
Newark storage center.
 
    DISTRIBUTIONS TO PARTNERS.  Annualized distribution rates were 7.5%, 7.125%,
and 6.125% for 1995, 1994 and 1993, respectively. Distributions are expected  to
continue  on a quarterly basis and  will reflect IDS3's future operating results
and cash position.
 
                                      101
<PAGE>
BENEFICIAL OWNERSHIP
 
    The following  table sets  forth as  of June  30, 1996  certain  information
regarding  beneficial ownership of equity interests  in the Partnerships and the
Common Stock by  the General  Partner of  each of  the Partnerships  and by  the
individual general partners of each of the General Partners. The Partnerships do
not  know of any other person who  beneficially owns directly or indirectly more
than 5% of the interest in any  of the Partnerships. Except as otherwise  noted,
the  Partnerships believe that the beneficial  owners of interests listed below,
based on information furnished by such  owners, have sole voting and  investment
power  with respect to such interests. Except  as otherwise noted, all shares of
Common Stock included in the following table are shares of the Company's Class A
Common Stock.
<TABLE>
<CAPTION>
                                                                                                               SHARES OF
                                                                                                             COMMON STOCK
                                                                                                             BENEFICIALLY
                                          PERCENT OF EQUITY            SHARES OF COMMON   SHARES OF COMMON    OWNED AFTER
                                    INTEREST PRIOR TO THE MERGERS            STOCK           STOCK TO BE      THE MERGERS
                                                                         BENEFICIALLY         ISSUED IN           (1)
                                         ------------------             OWNED PRIOR TO     CONNECTION WITH   -------------
NAME AND ADDRESS                   IDS1         IDS2         IDS3         THE MERGERS      THE MERGERS (1)      NUMBER
- ------------------------------     -----        -----        -----     -----------------  -----------------  -------------
<S>                             <C>          <C>          <C>          <C>                <C>                <C>
Shurgard Associates L.P.                 5%      --           --              --                 80,133           80,133 (2)
1201 Third Ave.
Suite 2200
Seattle, WA 98101
Shurgard Associates L.P. II         --                5 %     --              --                 53,724           53,724 (2)
1201 Third Ave.
Suite 2200
Seattle, WA 98101
Shurgard Associates L.P. III        --           --              7.5 %        --                118,430          118,430 (2)
1201 Third Ave.
Suite 2200
Seattle, WA 98101
Charles K. Barbo                    *            *            *             710,126        (4)        40,553    (6)     750,679
1201 Third Ave.
Suite 2200
Seattle, WA 98101
Arthur W. Buerk                     *            *            *             437,841     (5)        32,679    (7)     470,520
1201 Third Ave.
Seattle, WA 98101
 
<CAPTION>
NAME AND ADDRESS                  PERCENT
- ------------------------------  -----------
<S>                             <C>
Shurgard Associates L.P.            *
1201 Third Ave.
Suite 2200
Seattle, WA 98101
Shurgard Associates L.P. II         *
1201 Third Ave.
Suite 2200
Seattle, WA 98101
Shurgard Associates L.P. III        *
1201 Third Ave.
Suite 2200
Seattle, WA 98101
Charles K. Barbo                       2.8 %
1201 Third Ave.
Suite 2200
Seattle, WA 98101
Arthur W. Buerk                        1.8 %
1201 Third Ave.
Seattle, WA 98101
</TABLE>
 
- ------------------------------
*Less than one percent.
 
(1)  Assumes  the  Share  Price  is  $25.00  and  that  all  three  Partnerships
    participate in the Mergers.
 
(2)  The  shares of  Common  Stock beneficially  owned  by each  of  the General
    Partners after the Mergers will  be distributed to their respective  limited
    and general partners in accordance with the applicable GP Agreement.
 
(3)  Includes 3,747  shares held  for Mr.  Barbo's individual  account under the
    Company's Employee Retirement Savings Plan  and Trust, 4,900 shares held  by
    trusts  of which Mr. Barbo is a trustee, 2,500 shares over which Mr. Barbo's
    wife has voting and investment power  and 6,000 shares issuable on  exercise
    of stock options currently exercisable or exercisable within 60 days.
 
(4)  Includes 78,075 shares of Class B  Common Stock, which are convertible into
    Class A Common Stock at a one-to-one ratio upon repayment of a loan made  in
    connection  with satisfaction of certain general partner capital obligations
    in connection with the Consolidation.
 
(5) Includes 76,529 shares of Class  B Common Stock, which are convertible  into
    Class  A Common Stock at a one-to-one ratio upon repayment of a loan made in
    connection with satisfaction of certain general partner capital  obligations
    in connection with the Consolidation.
 
(6) Represents approximately 7,933, 5,319 and 7,851 shares issuable to Mr. Barbo
    with  respect  to his  interest as  a  general partner  of the  IDS1 General
    Partner,  the  IDS2   General  Partner   and  the   IDS3  General   Partner,
    respectively;  160, 107 and 159 shares issuable  to SGPI, of which Mr. Barbo
    is the  sole shareholder,  as  the corporate  general  partner of  the  IDS1
    General  Partner, the  IDS2 General  Partner and  the IDS3  General Partner,
    respectively; and 4,007, 2,941 and 12,076 shares issuable by the Company  to
    Mr.  Barbo with  respect to the  IDS1 Merger,  the IDS2 Merger  and the IDS3
    Merger, respectively, pursuant to the Contingent Shares Agreement.
 
(7) Represents approximately 7,933, 5,319 and 7,851 shares issuable to Mr. Buerk
    with respect  to his  interest as  a  general partner  of the  IDS1  General
    Partner,   the  IDS2   General  Partner   and  the   IDS3  General  Partner,
    respectively, and 2,438, 1,789 and 7,349  shares issuable by the Company  to
    Mr.  Buerk with  respect to the  IDS1 Merger,  the IDS2 Merger  and the IDS3
    Merger, respectively, pursuant to the Contingent Shares Agreements.
 
                                      102
<PAGE>
                    DISTRIBUTIONS AND MARKET PRICES OF UNITS
 
PARTNERSHIP DISTRIBUTIONS
 
    The following table sets forth the distributions paid per Unit of IDS1, IDS2
and IDS3 in the periods indicated  below. Amounts paid in the indicated  quarter
were  determined based upon Partnership operations during the preceding quarter.
The original cost per Unit was $250 for each of the Partnerships.
<TABLE>
<CAPTION>
                                           1988 (1)     1989 (1)     1990 (1)      1991       1992       1993       1994
                                          -----------  -----------  -----------  ---------  ---------  ---------  ---------
<S>                                       <C>          <C>          <C>          <C>        <C>        <C>        <C>
IDS1
  Quarter 1.............................         N/A    $    2.76    $    3.75   $    3.75  $    3.75  $    3.75  $    4.06
  Quarter 2.............................         N/A         3.75         3.75        3.75       3.75       3.75       4.14
  Quarter 3.............................   $    2.25         3.75         3.75        3.75       3.75       3.75       4.38
  Quarter 4.............................        3.03         3.75         3.75        3.75       3.75       3.91       4.45
IDS2
  Quarter 1.............................         N/A          N/A         1.31        3.91       3.91       3.91       3.91
  Quarter 2.............................         N/A          N/A         4.13        3.91       3.91       3.91       3.91
  Quarter 3.............................         N/A          N/A         3.60        3.91       3.91       3.91       3.91
  Quarter 4.............................         N/A          N/A         3.91        3.91       3.91       3.91       4.06
IDS3
  Quarter 1.............................         N/A          N/A          N/A        3.44       3.75       3.75       4.22
  Quarter 2.............................         N/A          N/A          N/A        3.78       3.79       3.75       4.38
  Quarter 3.............................         N/A          N/A          N/A        3.78       3.87       3.75       4.53
  Quarter 4.............................         N/A          N/A         3.76        3.75       3.75       4.06       4.69
 
<CAPTION>
                                            1995       1996
                                          ---------  ---------
<S>                                       <C>        <C>
IDS1
  Quarter 1.............................  $    4.69  $    4.84
  Quarter 2.............................       4.84     --
  Quarter 3.............................       4.84     --
  Quarter 4.............................       4.84     --
IDS2
  Quarter 1.............................       4.06       4.06
  Quarter 2.............................       4.06     --
  Quarter 3.............................       4.06     --
  Quarter 4.............................       4.06     --
IDS3
  Quarter 1.............................       4.69       4.69
  Quarter 2.............................       4.69     --
  Quarter 3.............................       4.69     --
  Quarter 4.............................       4.69     --
</TABLE>
 
- ------------------------
(1) "N/A" for a particular quarter means that the Partnership had not  commenced
    operations as of the immediately preceding quarter.
 
MARKET PRICES OF UNITS
 
    VOLUME  OF SALES.   The Units of IDS1,  IDS2 and IDS3 are  not listed on any
national securities exchange or quoted in the over the counter market, and there
is no established public trading market for the Units. Secondary sales  activity
for  the  Units has  been limited  and  sporadic. The  General Partner  for each
Partnership  monitors  transfers  of  its  Partnership  Units  (i)  because  the
admission  of the transferee as a  substitute Unitholder requires the consent of
the General Partner under each Partnership Agreement and (ii) in order to  track
compliance  with safe harbor provisions to avoid treatment as a "publicly traded
partnership"  for  tax  purposes.  While  the  General  Partners  receive   some
information  regarding the  prices at which  secondary sale  transactions in the
Units have  been effectuated,  they  do not  receive or  maintain  comprehensive
information  regarding the activities of all  broker/dealers and others known to
facilitate  secondary  sales  of  the  Units.  It  should  be  noted  that  some
transactions may not be reflected on the records of the Partnerships.
 
    The  General Partners estimate, based solely  on the transfer records of the
Partnerships,  that  the  number  of  Units  transferred  in  secondary   market
transactions  (i.e.,  excluding  transactions  believed  to  be  between related
parties, family members or the same beneficial owner) was as follows:
 
                                      IDS1
 
<TABLE>
<CAPTION>
                                                                                 % OF TOTAL
                                                                 NO. OF UNITS       UNITS           NO. OF
PERIOD                                                            TRANSFERRED    OUTSTANDING     TRANSACTIONS
- ---------------------------------------------------------------  -------------  -------------  -----------------
<S>                                                              <C>            <C>            <C>
1992...........................................................          821          .554%               13
1993...........................................................          248          .167                 8
1994...........................................................        2,244         1.514                35
1995...........................................................        1,204          .812                33
Three months ending March 31, 1996.............................          347          .234                11
</TABLE>
 
                                      103
<PAGE>
                                      IDS2
 
<TABLE>
<CAPTION>
                                                                                 % OF TOTAL
                                                                 NO. OF UNITS       UNITS           NO. OF
PERIOD                                                            TRANSFERRED    OUTSTANDING     TRANSACTIONS
- ---------------------------------------------------------------  -------------  -------------  -----------------
<S>                                                              <C>            <C>            <C>
1992...........................................................          178          .155%                6
1993...........................................................           96          .083                 5
1994...........................................................          985          .856                22
1995...........................................................        1,232         1.070                36
Three months ending March 31, 1996.............................          117          .102                 6
</TABLE>
 
                                      IDS3
 
<TABLE>
<CAPTION>
                                                                                 % OF TOTAL
                                                                 NO. OF UNITS       UNITS           NO. OF
PERIOD                                                            TRANSFERRED    OUTSTANDING     TRANSACTIONS
- ---------------------------------------------------------------  -------------  -------------  -----------------
<S>                                                              <C>            <C>            <C>
1992...........................................................       --             --               --
1993...........................................................           84          .070%                4
1994...........................................................          372          .312                10
1995...........................................................          555          .466                16
Three months ending March 31, 1996.............................           54          .045                 3
</TABLE>
 
    SECONDARY MARKET INFORMATION.  Set forth  in the following table is  certain
information  regarding sale transactions in Units of the Partnerships, which was
obtained by  the  Company  and Partnerships  from  Stanger.  Stanger  summarizes
secondary  market prices for  the Units based on  actual transactions during the
reporting periods listed on the tables below. The transactions reflected in  the
tables  represent only some of the sale transactions in the Units. The following
secondary market  firms  provide  price  data to  Stanger:  2nd  Market  Capital
Services;  American  Partnership  Services;  Bigelow  Management,  Inc.; Chicago
Partnership Board; Cuyler & Associates; DCC Securities Corp.; Empire Securities;
EquityLine Properties; Equity Resources  Group; Fox &  Henry, Inc.; Frain  Asset
Management;   MacKenzie-Patterson  Securities;  Murillo  &  Company;  Nationwide
Partnership Marketplace;  New  York Partnership  Exchange;  Pacific  Partnership
Group; Partnership Service Network; Raymond James & Associates; Secondary Income
Funds; Securities Planners, Inc.; SunPoint Securities, Inc.; and The Partnership
Marketing Company.
 
    The information from Stanger set forth below is also reported in The Stanger
Report,  a  monthly  trade  publication. The  following  legend  accompanies the
secondary  market  information   included  in  The   Stanger  Report:   "Limited
partnerships  are designed as illiquid,  long-term investments. Secondary market
prices generally do not reflect the current value of partnership assets, nor are
they indicative of total return since prior cash distributions and tax  benefits
received  by the original  investor are not reflected  in the price. Transaction
prices are not verified by Robert A. Stanger & Company."
 
    Because no assurances can be given  that the prices reflected in the  tables
below  represent the  true value  of the Units,  such information  should not be
relied upon as indicative of the ability of the Unitholders to sell their  Units
in  secondary sale transactions or  as to the prices at  which such Units may be
sold.
 
                                      104
<PAGE>
                       IDS1 SECONDARY MARKET INFORMATION
 
<TABLE>
<CAPTION>
                                                        TRANSACTION PRICE(1)
                                                        --------------------
REPORTING PERIOD                                           LOW       HIGH      NUMBER OF UNITS
- ------------------------------------------------------  ---------  ---------  -----------------
<S>                                                     <C>        <C>        <C>
1992
  Quarter 1 (2).......................................     --         --             --
  Quarter 2...........................................  $   95.63  $  142.86            328
  Quarter 3...........................................     100.00     126.26            161
  Quarter 4...........................................     125.00     125.00             35
1993
  Quarter 1...........................................     119.00     129.00             65
  Quarter 2...........................................     129.00     139.00            136
  Quarter 3...........................................     129.60     150.00             74
  Quarter 4...........................................     152.00     152.00            260
1994
  Quarter 1...........................................     145.00     175.00            954
  Quarter 2...........................................     150.00     170.00            359
  Quarter 3...........................................     160.00     180.00            287
  Quarter 4...........................................     155.00     175.00            512
1995
  Quarter 1...........................................     168.00     190.00            586
  Quarter 2...........................................     175.00     180.25            198
  Quarter 3...........................................     163.75     198.53            257
  Quarter 4...........................................     180.00     200.00            153
1996 (3)
  Quarter 1...........................................     150.00     198.00            413
</TABLE>
 
- ------------------------
(1) The Transaction Price is given on a per Unit basis. The General Partner does
    not  know  whether  the  transaction  prices  shown  are  before  or   after
    commissions.  However, the  secondary-market firms  providing information to
    Stanger are instructed that, if they act as "principals," the reported price
    per Unit  should include  any mark-ups  and  if they  act as  "agents,"  the
    reported price per Unit should include any commissions, unless the firm acts
    as  a  retail  broker.  The  firms are  further  instructed  not  to include
    commissions paid by retail buyers or sellers to their retail brokers.
 
(2) No trade was reported to Stanger during this quarter.
 
(3) Secondary market  information for  the second  quarter of  1996 is  not  yet
    available from Stanger.
 
                                      105
<PAGE>
                       IDS2 SECONDARY MARKET INFORMATION
 
<TABLE>
<CAPTION>
                                                        TRANSACTION PRICE(1)
                                                        --------------------
REPORTING PERIOD                                           LOW       HIGH      NUMBER OF UNITS
- ------------------------------------------------------  ---------  ---------  -----------------
<S>                                                     <C>        <C>        <C>
1992
  Quarter 1...........................................  $  126.00  $  132.00            130
  Quarter 2 (2).......................................     --         --             --
  Quarter 3...........................................     100.00     132.20            114
  Quarter 4...........................................     119.58     130.00             96
1993
  Quarter 1...........................................     134.00     134.00             20
  Quarter 2...........................................     135.00     135.00             30
  Quarter 3 (2).......................................     --         --             --
  Quarter 4...........................................     157.00     157.00             18
1994
  Quarter 1...........................................     154.05     154.05             28
  Quarter 2...........................................     150.00     163.90            434
  Quarter 3...........................................     129.16     168.00            664
  Quarter 4...........................................     150.00     180.00            382
1995
  Quarter 1...........................................     146.00     177.00            440
  Quarter 2...........................................     149.00     176.58            102
  Quarter 3...........................................     150.00     185.97            569
  Quarter 4...........................................     170.00     185.98            266
1996 (3)
  Quarter 1...........................................     162.00     185.00            140
</TABLE>
 
- ------------------------
(1) The Transaction Price is given on a per Unit basis. The General Partner does
    not   know  whether  the  transaction  prices  shown  are  before  or  after
    commissions. However, the  secondary-market firms  providing information  to
    Stanger are instructed that, if they act as "principals," the reported price
    per  Unit  should include  any mark-ups  and  if they  act as  "agents," the
    reported price per Unit should include any commissions, unless the firm acts
    as a  retail  broker.  The  firms are  further  instructed  not  to  include
    commissions paid by retail buyers or sellers to their retail brokers.
 
(2) No trade was reported to Stanger during this quarter.
 
(3) Secondary  market  information for  the second  quarter of  1996 is  not yet
    available from Stanger.
 
                                      106
<PAGE>
                       IDS3 SECONDARY MARKET INFORMATION
 
<TABLE>
<CAPTION>
                                                        TRANSACTION PRICE(1)
                                                        --------------------
REPORTING PERIOD                                           LOW       HIGH      NUMBER OF UNITS
- ------------------------------------------------------  ---------  ---------  -----------------
<S>                                                     <C>        <C>        <C>
1992
  Quarter 1 (2).......................................     --         --             --
  Quarter 2 (2).......................................     --         --             --
  Quarter 3 (2).......................................     --         --             --
  Quarter 4...........................................  $  131.00  $  131.00             20
1993
  Quarter 1 (2).......................................     --         --             --
  Quarter 2...........................................     129.00     167.00             53
  Quarter 3 (2).......................................     --         --             --
  Quarter 4...........................................     120.00     157.90            284
1994
  Quarter 1...........................................     166.00     166.00             60
  Quarter 2...........................................     182.00     182.00             60
  Quarter 3...........................................     166.25     175.00             80
  Quarter 4...........................................     160.00     194.25            140
1995
  Quarter 1...........................................     171.86     174.44             34
  Quarter 2...........................................     175.00     175.00             20
  Quarter 3...........................................     165.00     177.00            253
  Quarter 4...........................................     175.00     187.50            114
1996 (3)
  Quarter 1...........................................     165.00     200.00            294
</TABLE>
 
- ------------------------
(1) The Transaction Price is given on a per Unit basis. The General Partner does
    not  know  whether  the  transaction  prices  shown  are  before  or   after
    commissions.  However, the  secondary-market firms  providing information to
    Stanger are instructed that, if they act as "principals," the reported price
    per Unit  should include  any mark-ups  and  if they  act as  "agents,"  the
    reported price per Unit should include any commissions, unless the firm acts
    as  a  retail  broker.  The  firms are  further  instructed  not  to include
    commissions paid by retail buyers or sellers to their retail brokers.
 
(2) No trade was reported to Stanger during this quarter.
 
(3) Secondary market  information for  the second  quarter of  1996 is  not  yet
    available from Stanger.
 
                                      107
<PAGE>
                     BUSINESS AND PROPERTIES OF THE COMPANY
 
HISTORY OF THE COMPANY
 
    The Company began operations as a REIT through the Consolidation on March 1,
1994 of 17 publicly held real estate limited partnerships that were sponsored by
the  Management Company. In order to create  a fully integrated company and more
closely align  the interests  of management  with stockholders,  the  Management
Company  merged  with the  Company on  March  24, 1995.  In connection  with the
Management Company Merger, the outstanding shares of the Management Company were
converted into 1,266,705 newly issued shares of Common Stock, subject to certain
adjustments. The Management Company  stockholders may receive additional  shares
over the five years following the Management Company Merger as consideration for
certain  partnership interests, including interests  in the Partnerships held by
the Management  Company that  were not  valued  at the  time of  the  Management
Company  Merger.  As a  result  of the  Management  Company Merger,  the Company
internalized the expertise and experience of the Management Company's  personnel
that cover all aspects of the self storage industry.
 
    The  Management Company  was incorporated in  1972 by Charles  K. Barbo, the
Company's Chairman,  President  and  Chief Executive  Officer,  to  sponsor  and
operate real estate investments. From its formation until the Management Company
Merger,  the Management  Company was involved  in the organization  of 20 public
partnerships, which  raised in  the aggregate  approximately $600  million  from
approximately  80,600 investors with the objective of investing in the ownership
and  operation  of  self  storage  properties.  The  majority  of  these  public
partnerships  were  consolidated  into  the Company  in  the  Consolidation. The
Company is an independent, fully integrated real estate operating company,  with
in-house  expertise covering all aspects of the self storage industry, including
real  estate  development,  acquisition  and  disposition,  project  design  and
consulting,  full-service property management capabilities, marketing, personnel
management, legal, accounting and finance.
 
THE PROPERTIES
 
    The Company owned and operated, as  of March 31, 1996, directly and  through
its  subsidiaries and joint ventures, 178  self storage properties located in 19
states and  Europe. In  addition, the  Company  owns two  business parks  and  a
commercial building located in the Seattle metropolitan area. The Company's self
storage  properties are designed to offer  accessible storage space for personal
and business uses. Individuals typically  rent individual units in self  storage
properties  for storage  of personal  belongings such  as furniture, appliances,
motor vehicles, boats  and other  household and  recreational goods.  Businesses
typically  rent  space  for  storage of  business  property  such  as equipment,
seasonal goods, records and fixtures. The Company believes that it is  desirable
to have commercial customers because they tend to rent larger units and stay for
longer  terms,  are  more  reliable  payers  and  are  less  sensitive  to price
increases.  Accordingly,  the  Company   has  marketing  programs  that   target
commercial  users.  The  Company  estimates that  commercial  users  account for
approximately 35% to 40% of its total occupancy.
 
    The  Company's  self  storage  properties  are  divided  into  a  number  of
self-enclosed  rental units that generally  range in size from  25 to 360 square
feet. Many properties have uncovered  storage outside the buildings for  parking
motor  vehicles, boats,  campers and  other similar  items suitable  for outside
storage. Approximately  20%  of the  properties  owned by  the  Company  include
climate-controlled  storage units for which the Company usually charges rents at
substantial premiums.
 
    Customers  of  self  storage   properties  are  generally  responsible   for
delivering  and retrieving their  goods. Generally, customers  can access leased
space directly by automobile  or truck, but some  properties, in particular  the
multistory  buildings, have separate  loading docks and  elevators available for
delivery and retrieval of stored goods. Customers generally have access to their
unit without additional charge during  normal business hours and control  access
to  such space through the use of  padlocks. The Company offers truck rentals at
the majority of its properties. The Company believes it
 
                                      108
<PAGE>
is the largest leasing agent of Ryder trucks in the United States, based on  the
number  of truck  rental locations.  In addition  to truck  rentals, the Company
sells locks, boxes and packing and storage materials at its stores.
 
    The leasing,  maintenance and  operation  of the  Company's stores  are  the
responsibility  of  store  managers.  Property security  is  provided  through a
variety of systems that may include, among others, on site personnel, electronic
devices such as intrusion and fire  alarms, access controls, video and  intercom
surveillance devices, property fencing and lighting.
 
    Although  the Company's stores  range considerably in  size, most properties
consist of one or more single-story buildings that are located on a site of  1.5
to  5 acres.  The smallest  store has  approximately 25,000  net rentable square
feet, while  the largest  store has  approximately 300,000  net rentable  square
feet.  The properties generally  are constructed with  concrete block or tilt-up
concrete panels, with  steel columns or  precast concrete columns  that rest  on
concrete  footings and slabs, and have built-up tar roofs or pitched truss roofs
with shingles or  standing seam metal  roofs. The interior  walls generally  are
constructed with metal studs and partitions or other construction materials that
are  secure but readily  movable. The parking areas  and driveways are generally
paved with asphalt or cement. All  stores have fencing, floodlights, sliding  or
swinging gates and certain additional security devices mentioned above.
 
    In  some cases, multistory buildings able  to bear substantial weight loads,
such as warehouses and newspaper plants,  have been converted into self  storage
properties. In addition, similar multistory buildings for self storage have been
constructed  in dense urban areas where land costs, zoning and other development
considerations make  it impractical  or  undesirable to  construct  single-story
buildings.
 
    Storage  units are  usually rented  on a  month-to-month basis.  The Company
estimates that the average rental stay for a tenant is approximately 1.5  years.
This average is comprised of the rental periods of business tenants, who tend to
stay  in rented units for longer periods (averaging  2 to 3 years), and those of
residential customers, who  tend to  stay in  rented units  for shorter  periods
(averaging  six months to  a year). Rental income  from leased space constitutes
the primary revenue  from such  properties, but additional  revenue is  received
from  incidental services rendered at the properties, such as lock and box sales
and truck rentals. Rental rates vary substantially depending on the size of  the
storage space and the property location and quality of the property.
 
    The  following table  provides information  regarding the  year developed or
acquired (by  the  Company  or  by  one of  the  partnerships  included  in  the
Consolidation,  as the case may be), year built, approximate net rentable square
feet and acreage of each of the self storage properties and business parks owned
by the Company  as of March  31, 1996. The  Company owns additional  undeveloped
properties not reflected in the table.
 
<TABLE>
<CAPTION>
                                                                               APPROXIMATE
                               PROPERTY      PROPERTY     OWNED      YEAR     NET RENTABLE
      PROPERTY NAME            LOCATION        STATE      SINCE      BUILT     SQUARE FEET     ACREAGE
- -------------------------  ----------------  ---------  ---------  ---------  -------------  -----------
<S>                        <C>               <C>        <C>        <C>        <C>            <C>
Chandler                   Chandler             AZ           1986       1986       69,000           4.0
Mesa                       Mesa                 AZ           1987       1985      103,000           4.8
Phoenix                    Phoenix              AZ           1985       1984       77,000           2.7
Phoenix East               Phoenix              AZ           1987       1984       66,000           2.0
Scottsdale                 Scottsdale           AZ           1985    1976/85       47,000           3.0
Scottsdale North           Scottsdale           AZ        1985/87       1985      112,000           4.1
Tempe                      Tempe                AZ           1984       1976       54,000           3.0
Warner (1)                 Mesa                 AZ           1995       1985       62,000           3.1
Colton                     Colton               CA           1985       1984       73,000           3.8
Culver City                Los Angeles          CA           1988       1989       76,000           1.4
Daly City                  Daly City            CA           1995       1989       96,000           5.2
El Cajon                   El Cajon             CA           1986       1977      127,000           6.0
El Cerrito                 Richmond             CA           1986       1987       62,000           1.5
Fontana Sierra             Fontana              CA           1987    1980/85       84,000           3.6
Hayward                    Hayward              CA           1985       1983       48,000           2.8
</TABLE>
 
                                      109
<PAGE>
<TABLE>
<CAPTION>
                                                                               APPROXIMATE
                               PROPERTY      PROPERTY     OWNED      YEAR     NET RENTABLE
      PROPERTY NAME            LOCATION        STATE      SINCE      BUILT     SQUARE FEET     ACREAGE
- -------------------------  ----------------  ---------  ---------  ---------  -------------  -----------
Huntington Beach           Huntington           CA           1988       1986       91,000           3.3
                           Beach
<S>                        <C>               <C>        <C>        <C>        <C>            <C>
Kearney-Balboa             San Diego            CA           1986       1984       94,000           2.3
La Habra                   La Habra             CA           1986    1979/91       97,000           7.1
Mountain View              Mountain View        CA           1987       1986       29,000           0.7
Palo Alto                  Palo Alto            CA           1986       1987       49,000           1.4
S. San Francisco           San Francisco        CA           1987       1985       57,000           2.1
Santa Ana                  Santa Ana            CA           1986    1975/86      168,000           8.1
Solana Beach (3)           Solana Beach         CA           1987       1984       95,000           4.5
Sunnyvale                  Sunnyvale            CA           1986    1974/75      122,000           6.5
Union City                 Hayward              CA           1985       1985       42,000           2.9
Westwood                   Santa Monica         CA           1986       1988       38,000           0.3
Lakewood                   Golden               CO           1986       1985       67,000           2.7
Northglenn                 Northglenn           CO           1987       1979       75,000           5.5
Tamarac                    Denver               CO           1984       1977       25,000           1.9
Thornton                   Denver               CO           1984       1984       41,000           2.4
Windermere                 Littleton            CO           1984    1977/79       83,000           5.3
Military Trail             West Palm Beach      FL           1987       1981      124,000           9.4
Oakland Park               Ft. Lauderdale       FL           1985    1974/78      292,000          13.4
Seminole                   Seminole             FL           1986    1984/85       61,000           2.7
West Palm Beach            West Palm Beach      FL           1987       1975      163,000          11.8
Ansley Park                Atlanta              GA           1995       1991       69,000           1.4
Brookhaven                 Atlanta              GA           1995       1992       66,000           2.0
Decatur                    Atlanta              GA           1995       1992       63,000           2.5
Roswell                    Roswell              GA           1986       1986       57,000           3.8
Alsip                      Alsip                IL           1982       1980       66,000           4.6
Bridgeview                 Bridgeview           IL           1985       1983       75,000           4.1
Dolton                     Calumet City         IL           1982       1979       64,000           3.0
Hillside                   Hillside             IL           1988       1988       65,000           5.3
Lisle                      Lisle                IL           1986    1976/86       52,000           3.4
Lombard                    Lombard              IL           1982       1980       52,000           3.1
Oak Forest                 Orland Park          IL           1995       1991       63,000           3.9
Rolling Meadows            Rolling Meadows      IL           1982       1980       60,000           4.5
Schaumburg                 Schaumburg           IL           1982       1980       71,000           4.3
Willowbrook                Willowbrook          IL           1986    1979/82       44,000           3.3
College Park               Indianapolis         IN           1986       1984       70,000           6.0
Glendale                   Indianapolis         IN           1986       1985       60,000           5.6
Briggs Chaney              Silver Spring        MD           1994       1987       28,000           2.0
Clinton                    Clinton              MD           1986       1985       31,000           2.0
Crofton                    Gambrills            MD           1988       1985       40,000           2.1
Frederick                  Frederick            MD           1994       1987       32,000           1.7
Gaithersburg               Gaithersburg         MD           1994       1986       57,000           5.4
Germantown                 Germantown           MD           1994       1988       45,000           1.9
Laurel                     Laurel               MD           1988       1984       30,000           2.0
Oxon Hill                  Ft. Washington       MD           1994       1987       28,000           1.3
Suitland                   Suitland             MD           1987       1985       44,000           2.7
Ann Arbor                  Ann Arbor            MI           1988       1977       62,000           3.9
Canton (4)                 Canton               MI           1988       1986       58,000           3.3
Fraser (4)                 Fraser               MI           1988       1985       73,000           5.2
Grand Rapids               Grand Rapids         MI           1983       1978       46,000           3.2
Kalamazoo                  Kalamazoo            MI           1980       1980       43,000           3.0
Lansing                    Lansing              MI           1983    1978/79       41,000           2.5
Livonia (4)                Livonia              MI           1988       1985       67,000           4.8
Madison Heights            Madison Heights      MI           1995       1977       66,000           4.1
Plymouth                   Canton               MI           1985       1979       75,000           5.3
                           Township
Southfield                 Southfield           MI           1983       1976       77,000           4.3
Taylor                     Taylor               MI           1995       1980       66,000           4.2
</TABLE>
 
                                      110
<PAGE>
<TABLE>
<CAPTION>
                                                                               APPROXIMATE
                               PROPERTY      PROPERTY     OWNED      YEAR     NET RENTABLE
      PROPERTY NAME            LOCATION        STATE      SINCE      BUILT     SQUARE FEET     ACREAGE
- -------------------------  ----------------  ---------  ---------  ---------  -------------  -----------
Troy East                  Troy                 MI           1981    1975/77       79,000           4.8
<S>                        <C>               <C>        <C>        <C>        <C>            <C>
Troy West                  Troy                 MI           1983       1979       88,000           5.2
Walled Lake                Walled Lake          MI        1985/89       1984       68,000           4.3
Warren (4)                 Warren               MI           1988       1985       68,000           4.6
Bellefontaine              St. Louis            MO           1985       1979       45,000           4.9
Brentwood                  Brentwood            MO           1988       1977       53,000           3.4
Olive Innerbelt            St. Louis            MO           1987    1952/86       94,000           2.5
Capital Blvd               Raleigh              NC           1994       1984       35,000           2.1
Cary                       Cary                 NC           1994       1984       62,000           4.7
Garner                     Garner               NC           1994       1987       28,000           3.1
Glenwood                   Raleigh              NC           1994       1983       31,000           1.9
Morrisville                Morrisville          NC           1994       1988       40,000           3.3
Old Bridge                 Matawan              NJ           1987       1987       78,000           6.1
Northern                   Long Island City     NY           1987       1940       78,000           1.9
Gold                       Brooklyn             NY           1986       1940      108,000           0.4
Utica                      Brooklyn             NY           1986       1964       71,000           1.1
Van Dam                    Long Island City     NY           1986       1925       63,000           0.5
Yonkers                    Yonkers              NY           1986       1928      102,000           1.6
Barbur Boulevard           Portland             OR           1995       1993       67,000           2.8
Beaverton                  Beaverton            OR           1985       1974       26,000           2.0
Denny Road                 Beaverton            OR           1989       1988       65,000           6.2
King City                  Tigard               OR           1987       1986       84,000           4.9
Liberty Road               Salem                OR           1995       1993       54,000           4.4
Oregon City                Portland             OR           1995       1992       57,000           3.2
Portland                   Portland             OR           1988       1988       49,000           2.1
Salem                      Salem                OR           1983    1979/81       67,000           3.8
Airport                    Philadelphia         PA           1986       1985      101,000           6.7
Edgmont                    Philadelphia         PA           1995       1992       64,000           5.5
West Chester (3)           West Chester         PA           1986       1980       87,000           7.0
Franklin (5)               Nashville            TN           1995       1995       55,000           3.3
Hermitage (6)              Nashville            TN           1995       1995       68,000          19.0
Medical Center (7)         Nashville            TN           1994       1995       60,000           2.3
Arlington                  Arlington            TX           1986       1984       57,000           2.7
Bandera Road               San Antonio          TX           1988       1981       76,000           3.6
Bedford                    Bedford              TX           1985       1984       69,000           2.7
Beltline Rd.               Irving               TX           1989    1985/86       89,000           6.3
Blanco Road                San Antonio          TX           1988    1989/91       66,000           3.6
Euless Blvd.               Hurst                TX           1987       1974       68,000           4.7
Federal                    Houston              TX           1988       1988       55,000           3.4
Fredricksburg              San Antonio          TX           1987    1978/82       82,000           4.5
Greenbriar                 Houston              TX           1989       1988       60,000           1.8
Hill Country Village       San Antonio          TX           1985       1982       79,000           4.0
Hillcroft (3)              Houston              TX           1991       1988       59,000           3.4
Imperial Valley            Houston              TX           1988       1987       54,000           3.1
Irving                     Irving               TX           1985    1975/84       78,000           4.2
Kingwood                   Kingwood             TX           1988       1988       54,000           3.3
MacArthur Blvd.            Irving               TX           1986       1984       63,000           7.2
Medical Center             Houston              TX           1989       1989       57,000           2.6
North Austin               Austin               TX           1986       1982       76,000           5.9
Park Cities East           Dallas               TX           1995       1995       56,000           4.3
Parker Road                Plano                TX           1995       1995       46,000           3.5
San Antonio NE             San Antonio          TX           1985       1982       74,000           3.6
South Hwy (6)              Houston              TX           1995       1995       53,000           4.1
Sugarland                  Sugarland            TX           1988       1987       55,000           3.0
Thousand Oaks              San Antonio          TX           1986       1987       53,000           2.9
Universal City (1)         San Antonio          TX           1995       1985       77,000           5.1
Westheimer                 Houston              TX           1986       1977       73,000           3.7
</TABLE>
 
                                      111
<PAGE>
<TABLE>
<CAPTION>
                                                                               APPROXIMATE
                               PROPERTY      PROPERTY     OWNED      YEAR     NET RENTABLE
      PROPERTY NAME            LOCATION        STATE      SINCE      BUILT     SQUARE FEET     ACREAGE
- -------------------------  ----------------  ---------  ---------  ---------  -------------  -----------
Woodlands                  Houston              TX           1988       1988       64,000           3.8
<S>                        <C>               <C>        <C>        <C>        <C>            <C>
Bayside                    Virginia Beach       VA           1988       1984       28,000           1.7
Cedar Road                 Chesapeake           VA           1994       1989       36,000           2.1
Charlottesville            Charlottesville      VA           1994       1984       32,000           2.1
Crater Road                Petersburg           VA           1994       1987       36,000           3.8
Dale City                  Dale City            VA           1994       1986       31,000           1.6
Fairfax                    Fairfax              VA           1986       1980       62,000           5.6
Falls Church               Falls Church         VA           1987       1988       93,000           1.5
Gainesville                Gainesville          VA           1994       1988       31,000           2.0
Herndon                    Herndon              VA           1988       1985       39,000           3.0
Holland Road               Virginia Beach       VA           1994       1985       34,000           3.9
Jefferson Davis Hwy        Richmond             VA           1994       1990       35,000           5.2
Kempsville                 Virginia Beach       VA           1989       1985       33,000           2.0
Laskin Road                Virginia Beach       VA           1994       1984       39,000           2.5
Manassas East              Manassas             VA           1988       1984       35,000           2.0
Manassas West              Manassas             VA           1988       1985       35,000           1.5
Newport News S.            Newport News         VA        1985/92       1985       60,000           3.9
North Richmond             Richmond             VA           1988       1984       37,000           2.6
Princess Anne Road         Virginia Beach       VA           1994       1985       40,000           2.2
Temple Avenue              Petersburg           VA           1994       1989       34,000           4.0
Virginia Beach             Virginia Beach       VA           1989       1985       36,000           2.3
Aurora North               Seattle              WA           1986       1978       58,000           1.6
Bellevue East and West     Bellevue             WA           1984       1975      165,000          10.8
(8)
Bellingham                 Bellingham           WA           1981       1981       73,000           5.7
Burien                     Seattle              WA           1985       1974       92,000           5.3
Capitol Hill (9)           Seattle              WA           1987       1988       76,000           0.7
Downtown Seattle (10)      Seattle              WA           1986       1912       28,000           0.3
East Lynnwood              Lynnwood             WA           1986       1978       80,000           3.8
Edmonds                    Edmonds              WA           1984    1974/75      120,000           6.5
Everett                    Everett              WA           1981       1978       64,000           4.2
Factoria                   Bellevue             WA           1984       1984       57,000           3.8
Federal Way                Federal Way          WA           1984       1975      134,000           5.7
Fife (11)                  Tacoma               WA           1984       1977       64,000           3.9
Highland Hill              Tacoma               WA           1981       1982       60,000           3.9
Interbay                   Seattle              WA           1987       1988       80,000           0.4
Issaquah                   Issaquah             WA           1985       1986       56,000           4.7
Lake City (1)              Seattle              WA           1995       1987       51,000           1.1
North Spokane              Spokane              WA           1984       1976       76,000           4.1
Renton                     Renton               WA           1984    1979/89       80,000           4.5
Sea-Tac                    Seattle              WA           1985       1979       60,000           3.0
Seattle                    Seattle              WA           1983       1979       79,000           4.5
Smokey Point               Arlington            WA           1987    1984/87       34,000           2.2
South Hill                 Seattle              WA           1995       1980       44,000           2.8
South Tacoma               Tacoma               WA           1987       1975       46,000           3.1
Southcenter                Renton               WA           1985       1979       67,000           4.1
Tacoma Interstate (11)     Tacoma               WA       87/88/91    1979/81      128,000          12.2
Totem Lake                 Kirkland             WA           1984       1978       61,000           2.6
Vancouver Mall             Vancouver            WA           1980       1982       46,000           3.3
West Seattle               Seattle              WA           1980       1981       48,000           3.4
Woodinville                Woodinville          WA           1984    1982/84       70,000           3.5
Forest (2)                 Brussels           Belgium        1995       1995       49,000           0.4
Molenbeek (2)              Brussels           Belgium        1995       1995       34,000           0.5
Waterloo (2)               Waterloo           Belgium        1995       1995       86,000           3.5
</TABLE>
 
- ------------------------------
 (1) The Company owns a 59.5% interest in this property.
 
 (2) The Company owns an 85.6% interest in this property.
 
 (3) The  Company  does not  have fee  title,  but has  a long-term  lease, with
     respect to the land on which property is located.
 
                                      112
<PAGE>
 (4) Through its ownership in  SJP II (a joint  venture with IDS1), the  Company
     owns a 30% interest in this property.
 
 (5) The Company owns a 92% interest in this property.
 
 (6) The Company owns a 50% interest in this property.
 
 (7) The Company owns a 67% interest in this property.
 
 (8) Bellevue East and Bellevue West are now operated as one property.
 
 (9) The Company owns a 90% interest in this property.
 
(10) Property is a commercial building.
 
(11) Property is a business park.
 
    The  following table sets  forth information regarding  weighted average net
rentable square foot occupancy and weighted average annual rent per net rentable
square foot for the domestic self  storage properties owned by the Company  (and
its  predecessors) for the years ended December  31, 1993, 1994 and 1995 and the
quarter ended March 31, 1996.
<TABLE>
<CAPTION>
                                                   WEIGHTED AVERAGE OCCUPANCY
                                     ------------------------------------------------------   AVERAGE RENT PER SQUARE FOOT
                                                                                             -------------------------------
                                                  YEAR ENDED
                                                 DECEMBER 31,                THREE MONTHS        YEAR ENDED DECEMBER 31,
                                     -------------------------------------  ENDED MARCH 31,  -------------------------------
STATE                                  1993(1)       1994         1995           1996         1993(1)     1994       1995
- -----------------------------------  -----------     -----        -----     ---------------  ---------  ---------  ---------
<S>                                  <C>          <C>          <C>          <C>              <C>        <C>        <C>
Arizona............................          97%          91%          84%            79%    $    6.26  $    7.50  $    9.15
California.........................          88           86           85             85          8.85       9.28      10.04
Colorado...........................          96           91           88             82          6.30       7.01       7.52
Florida............................          83           85           83             84          7.67       7.70       8.12
Illinois...........................          91           95           95             89          7.47       7.84       8.30
Michigan...........................          87           91           93             90          6.08       6.66       7.38
New York...........................          80           87           92             90         14.34      14.63      15.14
Oregon.............................          89           93           92             92          6.82       7.22       7.77
Texas..............................          79           87           82             77          7.41       7.63       8.13
Virginia...........................          90           89           90             90          9.40       9.94       8.95
Washington.........................          88           88           89             90          7.58       7.83       8.17
Other..............................          89           92           89             87          7.95       8.53       9.48
                                             --           --           --             --
                                                                                             ---------  ---------  ---------
    Total..........................          87%          89%          88%            86%    $    7.84  $    8.25  $    8.84
                                             --           --           --             --
                                             --           --           --             --
                                                                                             ---------  ---------  ---------
                                                                                             ---------  ---------  ---------
 
<CAPTION>
 
                                        THREE
                                       MONTHS
                                     ENDED MARCH
STATE                                 31, 1996
- -----------------------------------  -----------
<S>                                  <C>
Arizona............................   $    9.05
California.........................       10.21
Colorado...........................        7.76
Florida............................        8.72
Illinois...........................        8.50
Michigan...........................        7.73
New York...........................       15.49
Oregon.............................        8.21
Texas..............................        8.33
Virginia...........................        9.14
Washington.........................        7.98
Other..............................       10.05
 
                                     -----------
    Total..........................   $    9.04
 
                                     -----------
                                     -----------
</TABLE>
 
- ------------------------
(1) Calculated as the weighted average of  the original 137 properties owned  by
    the Company.
 
    The  following table sets  forth same store  information regarding aggregate
weighted average net rentable square foot occupancy and weighted average  annual
rent per net rentable square foot for the 137 self storage properties originally
owned  by the Company for the years ended December 31, 1991 through December 31,
1995 and the quarter ended March 31, 1996.
 
<TABLE>
<CAPTION>
                                                                     YEAR ENDED DECEMBER 31,                      THREE MONTHS
                                                 ---------------------------------------------------------------  ENDED MARCH
                                                  1991 (1)     1992 (1)     1993 (1)       1994         1995        31, 1996
                                                 -----------  -----------  -----------  -----------  -----------  ------------
<S>                                              <C>          <C>          <C>          <C>          <C>          <C>
Weighted average occupancy.....................         82%          86%          87%          89%          88%           86%
Weighted average rent per square foot..........  $    7.35    $    7.68    $    7.84    $    8.25    $    8.84     $    9.04
</TABLE>
 
- ------------------------
(1) Calculated as  a simple  average for  the 17  partnerships included  in  the
    Consolidation.
 
                                      113
<PAGE>
                          DESCRIPTION OF CAPITAL STOCK
 
COMMON STOCK AND CLASS B COMMON STOCK
 
    The  Company has  authority to  issue 120,000,000  shares of  Class A Common
Stock, par value $.001 per  share, and 500,000 shares  of Class B Common  Stock,
par  value $.001 per  share (the "Class B  Common Stock"). At  May 31, 1996, the
Company had outstanding 24,046,517 shares of Common Stock and 154,604 shares  of
Class  B Common Stock. The following description  of the Common Stock sets forth
certain general terms and provisions of  the Common Stock. The statements  below
describing  the Common  Stock are  in all respects  subject to  and qualified in
their entirety by reference to the  applicable provisions of the Certificate  of
Incorporation and Bylaws.
 
    TERMS.   Subject to the preferential rights of any other shares or series of
stock, holders of Common  Stock will be entitled  to receive dividends when,  as
and  if  declared by  the  Company's Board  of  Directors out  of  funds legally
available therefor. Payment and declaration of dividends on the Common Stock and
purchases of shares of Common  Stock by the Company  will be subject to  certain
restrictions  if the Company fails to pay dividends on any outstanding Preferred
Stock.
See "-- Preferred Stock." Upon any liquidation, dissolution or winding up of the
Company, holders of Common Stock (together with holders of Class B Common Stock)
will be  entitled to  share equally  and  ratably in  any assets  available  for
distribution  to them, after payment  or provision for payment  of the debts and
other liabilities of the Company and the preferential amounts owing with respect
to any outstanding Preferred Stock.  The Common Stock possesses ordinary  voting
rights  for the election of directors and in respect of other corporate matters,
each share entitling the holder thereof to one vote. Holders of Common Stock  do
not have cumulative voting rights in the election of directors, which means that
holders  of more than  50% of all the  shares of the  Company's Common Stock and
Class B Common  Stock voting for  the election  of directors can  elect all  the
directors if they choose to do so and the holders of the remaining shares cannot
elect  any directors. Holders of  shares of Common Stock  do not have preemptive
rights, which  means they  have no  right to  acquire any  additional shares  of
Common  Stock that may be issued by the Company at a subsequent date. All shares
of Common  Stock now  outstanding are,  and additional  shares of  Common  Stock
issued   pursuant  to  the   Mergers  will  be  when   issued,  fully  paid  and
nonassessable, and  no  shares  of  Common  Stock are  or  will  be  subject  to
preemptive or similar rights.
 
    The  Class B Common Stock  has rights substantially similar  to those of the
Common Stock. Each holder of  Class B Common Stock was  entitled to a loan  from
the  Company  in an  amount necessary  to satisfy  the holder's  general partner
capital obligation to certain partnerships that were acquired by the Company  in
the  Consolidation. Each loan is secured by a pledge of the Class B Common Stock
held by the borrowing stockholder. Upon repayment of a portion of the loan, that
portion of  the  Class B  Common  Stock equal  to  the percentage  of  the  loan
principal  repaid  is  released  from  the  pledge  and  is  convertible,  on  a
share-for-share basis, into shares of Common Stock. Class B Common Stock is  not
publicly traded but is transferable upon its release from the pledge.
 
    RESTRICTIONS  ON OWNERSHIP.  For the Company  to qualify as a REIT under the
Code not more than 50% in value  of its outstanding capital stock may be  owned,
actually or constructively, by five or fewer individuals (defined in the Code to
include  certain entities) during the last half of a taxable year. To assist the
Company in meeting this  requirement, the Company has  taken certain actions  to
limit  the beneficial ownership, actually or  constructively, by a single person
or entity of the Company's  outstanding equity securities. See "--  Restrictions
on Transfers of Capital Stock; Excess Stock."
 
    TRANSFER  AGENT.  The registrar and transfer  agent for the Common Stock and
Class B Common Stock is Gemisys Corporation.
 
    STOCKHOLDER RIGHTS PLAN.  Pursuant to the Rights Agreement dated as of March
17, 1994, between  the Company  and Gemisys  Corporation, as  Rights Agent  (the
"Rights  Agreement"), holders  of shares  of the  Common Stock  and the  Class B
Common Stock have certain  rights to purchase shares  of the Company's Series  A
Junior   Participating   Preferred   Stock  (the   "Junior   Preferred  Shares")
 
                                      114
<PAGE>
exercisable only in certain circumstances (the "Rights"). The Rights, which  are
represented  by certificates for the Common Stock  and the Class B Common Stock,
trade together  with the  Common Stock  and the  Class B  Common Stock  until  a
Distribution Date (as defined below). Each Right, when it becomes exercisable as
described   below,  will   entitle  the   registered  holder   to  purchase  one
one-hundredth of a  Junior Preferred  Share at $65  per one  one-hundredth of  a
Junior Preferred Share (subject to adjustment, the "Purchase Price").
 
    Until  the earlier to occur  of (a) 10 days  following a public announcement
that a  person or  group  of affiliated  or  associated persons  (an  "Acquiring
Person")  has acquired  beneficial ownership of  10% or more  of the outstanding
Common Stock and Class B  Common Stock and (b) 10  business days (or such  later
date as may be determined by action of the Company's Board of Directors prior to
such  time as  any person  or group of  affiliated persons  becomes an Acquiring
Person) following the commencement of, or announcement of an intention to  make,
a  tender offer or exchange offer, the consummation of which would result in the
beneficial ownership by a  person or group  of 10% or  more of such  outstanding
Common  Stock  and  Class  B  Common  Stock  (the  earlier  of  such  dates, the
"Distribution Date"), the Rights will be  evidenced, with respect to any of  the
Common  Stock and the Class B Common  Stock certificates outstanding as of March
25, 1994 (the "Rights  Record Date"), by  such Common Stock  and Class B  Common
Stock  certificate, with  a copy  of a Summary  of Rights  to Purchase Preferred
Shares (the "Summary of Rights") attached thereto.
 
    The Rights Agreement provides, that, until the Distribution Date (or earlier
redemption or expiration of the Rights), the Rights will be transferred with and
only with the Common Stock or Class B Common Stock. Until the Distribution  Date
(or earlier redemption or expiration of the Rights), new Common Stock or Class B
Common  Stock certificates issued after the  Rights Record Date upon transfer or
new issuance of Common  Stock or Class  B Common Stock  will contain a  notation
incorporating the Rights Agreement by reference. Until the Distribution Date (or
earlier  redemption or expiration of the  Rights), the surrender for transfer of
any certificates for Common Stock or Class B Common Stock outstanding as of  the
Rights  Record Date,  even without  such notation  or a  copy of  the Summary of
Rights being attached thereto, will also  constitute the transfer of the  Rights
associated with the Common Stock or the Class B Common Stock represented by such
certificate.  As soon as  practicable following the  Distribution Date, separate
certificates evidencing  the Rights  ("Right Certificates")  will be  mailed  to
holders  of record of  the Common Stock and  the Class B Common  Stock as of the
close of business on the Distribution Date, and such separate Right Certificates
alone will evidence the Rights.
 
    The Rights are not exercisable until the Distribution Date. The Rights  will
expire  on March 17, 2004, unless such date is extended or unless the Rights are
earlier redeemed or exchanged by the Company, in each case as described below.
 
    The Purchase Price  payable and  the number  of Junior  Preferred Shares  or
other securities or property issuable upon exercise of the Rights are subject to
adjustment  from time to  time to prevent dilution  (a) in the  event of a stock
dividend on, or a  subdivision, combination or  reclassification of, the  Junior
Preferred  Shares, (b) upon the grant to  holders of the Junior Preferred Shares
of certain rights  or warrants  to subscribe  for or  purchase Junior  Preferred
Shares at a price, or securities convertible into Junior Preferred Shares with a
conversion  price,  less  than  the  then-current  market  price  of  the Junior
Preferred Shares,  or  (c)  upon  the distribution  to  holders  of  the  Junior
Preferred  Shares  of evidences  of  indebtedness or  assets  (excluding regular
periodic cash dividends paid out of  earnings or retained earnings or  dividends
payable in Junior Preferred Shares) or of subscription rights or warrants (other
than those referred to above).
 
    The  number of outstanding Rights and the  number of one one-hundredths of a
Junior Preferred Share issuable upon exercise  of each Right is also subject  to
adjustment  in the event  of a stock  split of the  Common Stock or  the Class B
Common  Stock   or  a   dividend  on   the   Common  Stock   or  the   Class   B
 
                                      115
<PAGE>
Common  Stock  payable  in  Common  Stock  or  subdivisions,  consolidations  or
combinations of the Common Stock or the  Class B Common Stock occurring, in  any
such case, prior to the Distribution Date.
 
    Junior  Preferred Shares  purchasable upon  exercise of  the Rights  will be
redeemable only in accordance with the redemption provisions discussed under "--
Restrictions on Transfers of Capital Stock; Excess Stock." Each holder of Junior
Preferred Shares will be entitled  to a minimum preferential quarterly  dividend
payment of the greater of $1 per share and a per share dividend of 100 times the
aggregate  dividends declared per share of Common Stock or Class B Common Stock.
In the event  of liquidation,  the holders of  Junior Preferred  Shares will  be
entitled  to a minimum preferential liquidation payment of $100 per share or, if
greater, to an aggregate  per share payment of  100 times the aggregate  payment
made  per share of Common  Stock or Class B  Common Stock. Each Junior Preferred
Share will have 100 votes, voting together with the Common Stock and the Class B
Common Stock.  Finally, in  the  event of  any  merger, consolidation  or  other
transaction  in  which shares  of  Common Stock  and  Class B  Common  Stock are
exchanged, each Junior Preferred Share will be entitled to receive 100 times the
amount received per share of Common Stock and Class B Common Stock. These rights
are protected by customary antidilution provisions.
 
    Because of the nature of the Junior Preferred Shares' dividend,  liquidation
and  voting rights,  the value  of the  one one-hundredth  interest in  a Junior
Preferred Share purchasable upon exercise  of each Right should approximate  the
value of one share of Common Stock.
 
    If  any  person or  group  of affiliated  or  associated persons  becomes an
Acquiring Person, proper provision will be made so that each holder of a  Right,
other  than  Rights  beneficially  owned by  the  Acquiring  Person  (which will
thereafter be void),  will thereafter have  the right to  receive upon  exercise
that  number of shares of  Common Stock or Class B  Common Stock having a market
value, as of the date of exercise, of two times the exercise price of the Right.
If  the  Company  is  acquired  in  a  merger  or  other  business   combination
transaction,  or 50%  or more  of its consolidated  assets or  earning power are
sold, proper  provision  will be  made  so that  each  holder of  a  Right  will
thereafter  have  the  right  to  receive,  upon  the  exercise  thereof  at the
then-current exercise price of the Right, that number of shares of common  stock
of the acquiring company that at the time of such transaction will have a market
value of two times the exercise price of the Right.
 
    At  any time after any person or group becomes an Acquiring Person and prior
to the acquisition by  such person or  group of 50% or  more of the  outstanding
Common  Stock and  Class B  Common Stock, the  Company's Board  of Directors may
exchange the Rights (other than Rights owned  by such person or group that  have
become  void), in whole or in part, at  an exchange ratio of one share of Common
Stock or Class B Common Stock, or one one-hundredth of a Junior Preferred  Share
(or  of a  share of a  class or series  of the Company's  Preferred Stock having
equivalent  rights,  preferences   and  privileges),  per   Right  (subject   to
adjustment).
 
    With  certain  exceptions,  no  adjustment in  the  Purchase  Price  will be
required until cumulative adjustments  require an adjustment of  at least 1%  in
such Purchase Price. No fractional Junior Preferred Shares will be issued (other
than  fractions that  are integral  multiples of  one one-hundredth  of a Junior
Preferred  Share,  which  may,  at  the  Company's  election,  be  evidenced  by
depositary  receipts) and, in lieu  thereof, an adjustment in  cash will be made
based on the market price of the Junior Preferred Shares on the last trading day
prior to the date of exercise.
 
    At any time prior to any person  or group becoming an Acquiring Person,  the
Company's Board of Directors may redeem the Rights in whole, but not in part, at
the  price  of  $.0001  per  Right, with  adjustments  for  stock  splits, stock
dividends or other similar transactions (the "Redemption Price"). The redemption
of the Rights may be  made effective at such time,  on such basis and with  such
conditions  as  the Company's  Board  of Directors  in  its sole  discretion may
establish. Immediately upon any redemption of the Rights, the right to  exercise
the Rights will terminate and the only right of the holders of Rights will be to
receive the Redemption Price.
 
                                      116
<PAGE>
    The  terms of the Rights may be  amended by the Company's Board of Directors
without the consent  of the  holders of the  Rights, including  an amendment  to
lower certain 10% thresholds described above to not less than the greater of (a)
the  sum of .001% and the largest percentage of the outstanding Common Stock and
Class B Common Stock then known to  the Company to be beneficially owned by  any
person  or group of affiliated persons and (b) 9.8%, except that, from and after
such time as any person or group of affiliated or associated persons becomes  an
Acquiring  Person, no such  amendment may adversely affect  the interests of the
holders of the Rights.
 
    Until a Right is exercised, the holder thereof, as such, will have no rights
as a stockholder  of the Company,  including, without limitation,  the right  to
vote or to receive dividends.
 
    The  Rights  have  certain  antitakeover  effects.  The  Rights  will  cause
substantial dilution to a person or  group that attempts to acquire the  Company
without  conditioning the offer on substantially  all the Rights being acquired.
The Rights will  not interfere  with any  merger or  other business  combination
approved  by  the Company's  Board  of Directors  since  the Company's  Board of
Directors may, at its option, at any time prior to any person or group  becoming
an  Acquiring Person,  redeem all, but  not less than  all, the then-outstanding
Rights at the Redemption Price.
 
PREFERRED STOCK
 
    The Company is authorized to issue 40,000,000 shares of Preferred Stock, par
value $.001  per share,  of which  no shares  are outstanding.  The Company  has
designated  2,800,000  shares of  the Preferred  Stock  as the  Junior Preferred
Shares issuable  in connection  with the  Rights Agreement  discussed under  "--
Common Stock and Class B Common Stock -- Stockholder Rights Plan." The following
description  of  the  Preferred  Stock  sets  forth  certain  general  terms and
provisions of the Preferred Stock. The statements below describing the Preferred
Stock are  in  all  respects subject  to  and  qualified in  their  entirety  by
reference  to the applicable provisions of  the Certificate of Incorporation and
Bylaws.
 
    Shares of Preferred Stock  may be issued  from time to time  in one or  more
series as authorized by the Company's Board of Directors. Subject to limitations
prescribed  by  the  Delaware General  Corporation  Law and  the  Certificate of
Incorporation, the Company's Board of Directors is authorized to fix the  number
of   shares  constituting  each  series  of  Preferred  Stock  as  well  as  the
designations and powers,  preferences and relative,  participating, optional  or
other  special rights  and qualifications,  limitations or  restrictions of each
series. The  Board of  Directors or  a committee  thereof is  authorized to  fix
provisions  for each  series of  Preferred Stock  concerning voting, redemption,
dividends, dissolution or  the distribution of  assets, conversion or  exchange,
and other matters fixed by resolution. The Preferred Stock will, when issued, be
fully paid and nonassessable and will have no preemptive rights.
 
RESTRICTIONS ON TRANSFERS OF CAPITAL STOCK; EXCESS STOCK
 
    For the Company to qualify as a REIT under the Code, among other things, not
more  than 50% in value of its  outstanding capital stock may be owned, actually
or constructively, by five or fewer individuals (defined in the Code to  include
certain entities) during the last half of a taxable year, and such capital stock
must  be beneficially owned by 100 or more persons during at least 335 days of a
taxable year of 12 months  or during a proportionate  part of a shorter  taxable
year. To ensure that the Company remains qualified as a REIT, the Certificate of
Incorporation,  subject  to certain  exceptions, provides  that the  Company may
prevent the  transfer  and/or call  for  redemption  of shares  of  the  Company
(whether Common Stock, Class B Common Stock or Preferred Stock) if more than 50%
of the outstanding shares would be owned, actually or constructively, by five or
fewer persons (defined to include individuals, corporations, partnerships, joint
ventures  and  similar  entities)  or  if  one  person  would  own,  actually or
constructively, more than 9.8% of the  total outstanding shares (or such  higher
percentage  as  may  be determined  by  the  Company's Board  of  Directors (the
"Ownership Limit")). In addition, the Company may prevent such transfers  and/or
call  for  redemption  of  such  shares  if  the  Company's  Board  of Directors
determines in good faith that the shares have or may become concentrated to  the
extent  that may prevent  the Company from  qualifying as a  REIT. See "Material
Federal Income  Tax Considerations  -- Taxation  of  the Company  as a  REIT  --
Requirements  for Qualification." Any class or  series of Preferred Stock may be
subject to these restrictions if so stated in the
 
                                      117
<PAGE>
resolutions providing for the  issuance of such  Preferred Stock. Any  corporate
investor  wishing to  acquire or  own more  than 9.8%  of the  total outstanding
shares may petition the  Company's Board of Directors  in writing for  approval.
The  Company's Board will grant such request  unless it determines in good faith
that the acquisition or ownership of such shares would jeopardize the  Company's
qualification  as a  REIT under existing  federal tax laws  and regulations. Any
corporate investor intending to acquire shares in excess of the Ownership  Limit
must  give written notice  to the Company  of the proposed  acquisition no later
than the date on which the transaction occurs and must furnish such opinions  of
counsel, affidavits, undertakings, agreements and information as may be required
by  the  Company's Board  of Directors  to  evaluate or  to protect  against any
adverse effect of  the transfer.  Notwithstanding the  foregoing, the  Company's
Board  of Directors is not  required to grant a  request to adjust the Ownership
Limit if the  Company's Board of  Directors believes, based  on advice of  legal
counsel,  that the granting of  such request would cause  the Company's Board of
Directors to breach its fiduciary duties to the stockholders of the Company.
 
    If, despite the restrictions noted above, any person acquires shares of  the
Company's Common Stock and Class B Common Stock in excess of the Ownership Limit
(applying  certain constructive ownership provisions),  the shares most recently
acquired by such person in excess  of the Ownership Limit will be  automatically
exchanged  for  an  equal number  of  shares  of Excess  Stock.  The  Company is
authorized to issue  160,000,000 shares  of Excess  Stock, par  value $.001  per
share.  Pursuant to the Company's Certificate of Incorporation, shares of Excess
Stock have the  following characteristics: (a)  owners of Excess  Stock are  not
entitled  to exercise voting rights with respect to the Excess Stock; (b) Excess
Stock shall not be  deemed outstanding for purposes  of determining a quorum  at
any  annual or special meeting of stockholders; and (c) Excess Stock will not be
entitled to any  dividends or  other distributions.  Any person  who becomes  an
owner  of  Excess Stock  is obligated  to immediately  give the  Company written
notice of  such fact  and certain  information required  by the  Certificate  of
Incorporation.  Excess Stock is also deemed to have been offered for sale to the
Company or its designee for a period of 120 days from the later of (i) the  date
of  the transfer that created the Excess  Stock if the Company has actual notice
that such transfer  created the  Excess Stock  and (ii)  the date  on which  the
Company's Board of Directors determines in good faith that the transfer creating
the Excess Stock has occurred. The Company has the right during such time period
to  accept  the deemed  offer or,  in  the Board  of Directors'  discretion, the
Company may acquire and sell, or cause the owner to sell, the Excess Stock.  The
price  for the Excess Stock will  be the lesser of (y)  the closing price of the
shares exchanged into Excess Stock on  the national stock exchange on which  the
shares are listed as of the date the Company or its designee acquires the Excess
Stock  or, if  no such price  is available, as  determined in good  faith by the
Company's Board of Directors and  (z) the price per share  paid by the owner  of
the  shares that were exchanged  into Excess Stock or,  if no purchase price was
paid, the  fair market  value  of such  shares on  the  date of  acquisition  as
determined in good faith by the Company's Board of Directors. Upon such transfer
or  sale, the Excess Stock  will automatically convert to  Common Stock with all
voting and  dividend  rights  effective  as of  the  date  of  such  conversion;
provided,  however, that  the owner  will not  be entitled  to receive dividends
payable with respect to Common Stock for the period during which the shares were
Excess Stock.
 
    All certificates of Common Stock and Class B Common Stock, any other  series
of the Company's Common Stock or Class B Common Stock and any class or series of
Preferred  Stock  will bear  a legend  referring  to the  restrictions described
above. All persons who own a  specified percentage (or more) of the  outstanding
capital  stock of the Company must file an affidavit with the Company containing
information regarding their  ownership of  stock as  set forth  in the  Treasury
Regulations.  Under current Treasury Regulations,  the percentage is set between
 .5% and 5%,  depending on  the number  of record  holders of  capital stock.  In
addition,  each stockholder  shall upon  demand be  required to  disclose to the
Company in writing  such information with  respect to the  direct, indirect  and
constructive ownership of shares of capital stock of the Company as the Board of
Directors  deems necessary to comply with  the provisions of the Code applicable
to a  REIT,  to  comply  with  the  requirements  of  any  taxing  authority  or
governmental agency or to determine any such compliance.
 
                                      118
<PAGE>
    This  ownership limitation may have the  effect of precluding acquisition of
control of the Company by a third party unless the Board of Directors determines
that maintenance  of REIT  status is  no longer  in the  best interests  of  the
Company.
 
                       DISSENTERS' RIGHTS OF UNITHOLDERS
 
    The following is a summary of the rights of Unitholders who dissent from the
Mergers.  The summary does  not purport to  be complete and  is qualified in its
entirety  by  reference  to  Section  25.10.900  et  seq.  of  the  WULPA   (the
"Dissenters' Rights Statute"), a copy of which is attached as Appendix E to this
Proxy  Statement/Prospectus). Holders  of Common Stock  will not  be entitled to
dissenters' rights as a result of the  Mergers because they are not entitled  to
vote on the Mergers.
 
    Any  Unitholder contemplating the exercise of dissenters' rights is urged to
review the full text of the Dissenters' Rights Statute. The procedures set forth
in such Statute must be followed exactly or dissenters' rights may be lost.
 
    A  Unitholder  who  properly  follows  the  procedures  for  dissenting  and
demanding  payment  for his  or  her Units  pursuant  to the  Dissenters' Rights
Statute may be entitled to receive in cash the "fair value" of his or her  Units
plus  accrued interest in lieu of  the consideration provided in the Acquisition
Agreement. The "fair value" of a dissenting Unitholder's Units will be the value
of the Units immediately prior to the Effective Time. The "fair value" could  be
more  than, equal to or less than  the value of the consideration the Unitholder
would have received pursuant to the Acquisition Agreement if the Unitholder  had
not  dissented. In  the event the  dissenting Unitholder and  the Company cannot
agree on the "fair value" of the dissenter's Units, "fair value" may  ultimately
be determined by a court in an appraisal proceeding.
 
    Not  less than ten days prior to the approval of the Merger, the Partnership
must send a  written notice to  all Unitholders entitled  to approve the  Merger
that they may be entitled to assert dissenters' rights and include a copy of the
Dissenters' Rights Statute. To properly exercise dissenters' rights with respect
to  the  Merger and  to  be entitled  to  payment under  the  Dissenters' Rights
Statute, a Unitholder must, among other things, not vote in favor of the  Merger
and,  upon receipt  of a dissenters'  notice from the  Partnership (as described
below), timely deliver a demand for payment.  A VOTE AGAINST IS NOT IN ITSELF  A
SUFFICIENT  EXERCISE OF DISSENTERS' RIGHTS. Any Unitholder who wishes to dissent
and who executes and returns the  accompanying proxy must either vote  "against"
or  "abstain" as to his or her Partnership's participation in the Merger. If the
Unitholder returns a  signed ballot  without voting, or  votes in  favor of  the
Merger,  the Unitholder will be deemed to have voted in favor of the Merger, and
the Unitholder  will lose  any dissenters'  rights. Within  ten days  after  the
approval  of the Merger, the Partnership  will send a written dissenters' notice
to each Unitholder who  satisfied the requirements  above, indicating where  the
payment  demand must be sent and informing Unitholders as to the extent transfer
of the Units will be restricted. Such notice will include, among other things, a
form of payment demand and  the date by which  the Partnership must receive  the
payment  demand, which date may not  be less than 30 or  more than 60 days after
the dissenters'  notice is  delivered. Unitholders  who fail  to file  a  timely
written  intent to demand  payment or who vote  in favor of  the approval of the
Acquisition Agreement  and the  transactions contemplated  thereby will  not  be
entitled to receive the dissenters' notice and will be bound by the terms of the
Acquisition Agreement.
 
    Within  30  days after  the later  of the  Effective Time  and the  date the
payment demand is received,  each Partnership will pay  each dissenter who is  a
Unitholder  of that Partnership  and who complied with  the conditions above the
amount that the Partnership estimates to be the fair value of his or her  Units,
plus  accrued interest. The payment must  be accompanied by, among other things,
(i) copies of the Partnership's financial statements for the most recent  fiscal
year, (ii) an explanation of how the Partnership estimated the fair value of the
Units  and how  the accrued  interest was calculated,  (iii) a  statement of the
dissenters' right to demand  payment and (iv) a  copy of the Dissenters'  Rights
Statute.
 
                                      119
<PAGE>
    A  dissenter may  notify the Partnership  in writing of  the dissenter's own
estimate of the fair value of the  dissenter's Units and the amount of  interest
due, and demand payment of the dissenter's estimate, less any payment made, if:
 
        (a)  the dissenter believes that  the amount paid is  less than the fair
    value of  the dissenter's  Units or  that the  interest due  is  incorrectly
    calculated;
 
        (b)  the Partnership fails to make payment within 60 days after the date
    set for demanding payment; or
 
        (c) the Merger is not effected and the Partnership does not release  the
    transfer  restrictions imposed  on Units within  60 days after  the date set
    forth demanding payment.
 
    A dissenter will be deemed to have waived the right to demand payment unless
the dissenter notifies the Partnership of his or her demand in writing within 30
days after the Partnership makes payment for the dissenter's Units.
 
    If a demand for payment remains  unsettled, the Partnership will commence  a
proceeding  in the  Superior Court  of King  County, Washington,  within 60 days
after receiving the payment demand and petition the court to determine the  fair
value  of the Units and  accrued interest. If the  Partnership does not commence
such proceeding within  the 60-day  period, it  shall pay  each dissenter  whose
demand  remains unsettled  the amount  demanded. The  Partnership will  make all
dissenters (whether  or  not  residents  of  Washington)  whose  demands  remain
unsettled parties to the proceeding as in an action against their Units, and all
parties  must be served with a copy of the petition. The Partnership may join as
a party to the proceeding  any Unitholder who claims to  be a dissenter but  who
has  not,  in the  Partnership's opinion,  complied with  the provisions  of the
Dissenters' Rights Statute. If the court determines that such Unitholder has not
complied with the provisions of  the Dissenters' Rights Statute, the  Unitholder
shall  be dismissed as  a party. Each  dissenter made a  party to the proceeding
will be entitled to judgment  for the amount, if any,  by which the court  finds
the  fair value of the dissenter's Units, plus interest, exceeds the amount paid
by the Partnership.
 
                         ESTIMATED TAXABLE GAIN OR LOSS
 
    In order  to  assist  Unitholders  in  estimating  the  federal  income  tax
consequences  of  the  Mergers, the  following  table, prepared  by  the General
Partners, sets  forth  the  estimated gain  or  loss  that may  be  realized  by
Unitholders  receiving Shares  in the Mergers  in exchange for  each Unit. These
estimates assume that the fair  market value of the Shares  is equal to the  Net
Asset Values of the assets acquired in the Mergers. The actual amount and timing
of  gain or  loss recognized by  each Unitholder  will depend upon  a variety of
factors including the actual value of the Shares at the Closing Date for federal
income tax purposes (which may be different than the estimates set forth  below)
and  the adjusted tax basis of the  Partnership's assets as of the Closing Date.
These estimates assume  that the  Unitholder acquired his  or her  Units in  the
original  offering and not through the  secondary market. Purchasers of Units on
the secondary market may recognize additional gain to the extent the fair market
value of the Shares and amount  of cash received as additional consideration  or
in lieu of fractional shares exceeds such Unitholder's adjusted tax basis in his
or  her Units (adjusted  to reflect its  allocable share of  Partnership gain or
loss  recognized   on   the  Mergers).   See   "Material  Federal   Income   Tax
Considerations."
 
<TABLE>
<CAPTION>
                                                            MERGER
                                                         CONSIDERATION    TAX BASIS    ESTIMATED TAXABLE GAIN
PARTNERSHIP                                              PER UNIT (1)    PER UNIT(2)        PER UNIT (3)
- ------------------------------------------------------  ---------------  -----------  -------------------------
<S>                                                     <C>              <C>          <C>
IDS1..................................................     $     257      $     214           $      43
IDS2..................................................           222            220                   2
IDS3..................................................           308            236                  72
</TABLE>
 
                                      120
<PAGE>
- ------------------------
(1)  "Merger Consideration Per Unit" is computed by dividing that portion of the
    Net Asset Value allocable  to the Unitholders by  the number of  outstanding
    Units  in each Partnership  and assumes that  the Share Price  is within the
    Share Price Range.
 
(2) "Tax Basis Per Unit" is computed by dividing the adjusted portion of the tax
    basis of each Partnership's assets  net of the Partnership's liabilities  as
    of  December 31, 1995 that is allocable  to the Unitholders by the number of
    outstanding Units in such  Partnership. The adjusted  tax basis will  differ
    from the above amounts depending upon the timing of the Mergers.
 
(3)  "Estimated Taxable Gain Per Unit" is  computed by subtracting the tax basis
    from the Merger Consideration Per Unit for each Partnership.
 
                   MATERIAL FEDERAL INCOME TAX CONSIDERATIONS
 
GENERAL
 
    The following  discussion summarizes  certain  material federal  income  tax
considerations  that affect  a Unitholder's  exchange of  Units for  Shares in a
Merger and his or her subsequent  ownership and disposition of such Shares.  The
discussion  is general in  nature and is not  tax advice. It  is, of course, not
possible to  discuss  all  aspects of  federal  income  tax law  that  may  have
relevance  with respect to the Mergers  based on the individual circumstances of
particular  Unitholders  in   light  of   their  personal   investment  or   tax
circumstances,  or to certain types of investors (including insurance companies,
financial institutions or broker-dealers,  foreign corporations or  partnerships
and,  except to the limited extent described below, tax-exempt organizations and
persons who  are not  citizens or  residents of  the United  States) subject  to
special  treatment  under the  federal  income tax  laws.  This analysis  is not
intended as a substitute for careful tax planning, and prospective investors are
urged to consult their own tax advisors, attorneys or accountants with  specific
reference  to their  own tax situation  and potential changes  in the applicable
law. No representations are made as to state, local or foreign tax  consequences
to  any Unitholder resulting  from the Mergers and  the subsequent ownership and
disposition of the Shares. ACCORDINGLY, UNITHOLDERS SHOULD CONSULT THEIR OWN TAX
ADVISORS REGARDING THE  SPECIFIC TAX  CONSEQUENCES TO  THEM OF  THE EXCHANGE  OF
UNITS  FOR  SHARES  AND  CASH,  IF  ANY,  AND  THEIR  SUBSEQUENT  OWNERSHIP  AND
DISPOSITION OF SUCH  SHARES, INCLUDING  THE APPLICATION AND  EFFECT OF  FEDERAL,
STATE, LOCAL AND OTHER TAX LAWS AND OF POTENTIAL CHANGES IN APPLICABLE TAX LAWS.
 
OPINION OF COUNSEL
 
    The  Partnerships have obtained  an opinion of Perkins  Coie, counsel to the
Partnerships ("Counsel"), concerning  the likely  outcome on the  merits of  the
material   federal  income  tax  issues.  The  summary  of  federal  income  tax
considerations to the Unitholders set forth in this Proxy Statement/  Prospectus
has  been reviewed by Counsel, and, to  the extent such summary involves matters
of law or legal conclusions, Counsel is of the opinion that such statements  are
correct.  Such  opinion and  the discussion  herein  are based  on the  Code, as
amended, applicable Treasury Regulations  adopted thereunder, reported  judicial
decisions   and  IRS   rulings,  all  as   of  the  date   hereof,  and  certain
representations of the Company and the General Partners and factual  assumptions
related  to the ownership and operation of the Company and the Partnerships, and
assume that  the  actions  described  in  this  Proxy  Statement/Prospectus  are
completed  in  a  timely  fashion.  In the  opinion  of  Counsel,  the following
discussion fairly  summarizes the  federal income  tax considerations  that  are
likely  to  be material  to the  holder of  Units who  exchanges such  Units for
Shares. There can be no assurance, however, that the legal authorities on  which
such   opinion  and  this   discussion  are  based   will  not  change,  perhaps
retroactively,  that  the  Company's  representations  and  factual  assumptions
underlying  this discussion will be accurate or  that there will not be a change
in the  future  in the  circumstances  of the  Company  that would  affect  this
discussion.  Accordingly,  there  can be  no  assurance  that the  IRS  will not
challenge the conclusion  or propriety  of any of  Counsel's opinions.  Although
reasonable arguments
 
                                      121
<PAGE>
can  be made  for the  positions that  the Company  proposes to  take as  to tax
matters as described in this Proxy Statement/Prospectus, the federal income  tax
consequences  of a proposed  investment in the Company  cannot be predicted with
certainty, and there can be no assurance as to how the law will develop, or,  if
various issues are litigated, the outcome of the court decisions.
 
    Specifically,  Counsel has  reached the following  conclusions regarding the
material federal income tax issues under the law as currently in effect: (a) the
Company has been organized in conformity with the requirements for qualification
as a REIT under the Code and its method of operation as described in this  Proxy
Statement/Prospectus  and as represented by the  Company has permitted, and will
continue to permit,  it to continue  to so  qualify for its  prior, current  and
future taxable years; (b) based on the General Partners' representation that the
assets  of the Partnerships are held by  the Partnerships for investment and not
for sale to customers in the ordinary course of a trade or business, the Mergers
will not  result in  recognition  of a  material  amount of  unrelated  business
taxable income by any tax-exempt Unitholder that does not hold its interest in a
Partnership   either  as  a  dealer  under   Code  Section  512(b)(5)(B)  or  as
"debt-financed property" within the meaning of  Code Section 514, and is not  an
organization  described  in  Code Section  501(c)(7)  (social  clubs), 501(c)(9)
(voluntary  employee   beneficiary   associations),   501(c)(17)   (supplemental
unemployment  benefit  trusts)  or 501(c)(20)  (qualified  group  legal services
plans); (c) the Mergers will be taxable events for Unitholders in which gain  or
loss will (subject to the limits described below) be recognized to the extent of
each  Unitholder's allocable share of the difference  between (i) the sum of the
fair market value of the Shares received by a Partnership from the Company,  the
amount  of  any  cash paid  by  the  Company to  the  Partnership  as additional
consideration or in lieu of a fractional Share and the amount of any liabilities
of the Partnership assumed or pertaining  to properties acquired by the  Company
and  (ii) the Partnership's adjusted tax basis in its assets exchanged therefor;
and (d) Unitholders will recognize gain on  receipt of the Shares in the  Merger
to  the extent that the fair  market value of the Shares  and the amount of cash
received as additional consideration  or in lieu of  a fractional Share  exceeds
the Unitholder's adjusted tax basis in his or her Units exchanged therefor.
 
    With  respect to the opinion of Counsel relating to the qualification of the
Company as a REIT, it should be noted that whether the Company will qualify as a
REIT under the Code in  prior, current and future  taxable years will depend  on
whether  the Company met or meets  the various qualification tests imposed under
the Code (discussed below) through actual annual operating results, distribution
levels and diversity  of stock ownership.  The results of  these tests have  not
been and will not be reviewed by Counsel. Accordingly, no assurance can be given
that  the actual results of the  Company's operations for any particular taxable
year have satisfied and will satisfy such requirements. See "-- Taxation of  the
Company as a REIT--Requirements for Qualification" and "-- Failure to Qualify."
 
TAX CONSEQUENCES OF THE MERGERS
 
    TAX  CONSEQUENCES OF ACQUISITION.  In the Mergers, solely for federal income
tax purposes, each Partnership's assets will be treated as being transferred  to
the  Company in  return for Shares  of the  Company and cash  paid as additional
consideration or in lieu  of fractional Shares. Such  transfer will (subject  to
the  limits  described below)  result in  recognition  of gain  or loss  by each
Partnership and, therefore, will  result in recognition of  gain or loss by  the
Unitholders  in each Partnership (other  than certain tax-exempt Unitholders who
had not held  their Units  as a  dealer under  Code Section  512(b)(5)(B) or  as
"debt-financed  property"  within  the meaning  of  Code Section  514).  See "--
Consequences to  Tax-Exempt Unitholders."  The overall  amount of  gain or  loss
recognized  by each  Partnership will  (subject to  the limits  described below)
equal the difference between (a) the sum of the fair market value of the  Shares
received  by the Partnership in the Merger plus  any cash paid by the Company to
the Partnership as additional consideration or in lieu of a fractional Share and
the amount of liabilities of the Partnership assumed or pertaining to properties
acquired by the  Company and  (b) the Partnership's  adjusted tax  basis in  the
assets  exchanged therefor. Counsel can give  no opinion regarding the amount of
gain or loss recognized by  a Partnership because of  the factual nature of  the
determination.  To assist the Unitholders in  estimating the tax cost associated
with the Mergers, the General
 
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Partners have prepared a table estimating the amount of gain or loss that may be
recognized by a Unitholder receiving Shares in the Mergers in exchange for  each
Unit. See "Estimated Taxable Gain Or Loss."
 
    As  of December  31, 1995,  no Partnership has  made an  election under Code
Section 754. Accordingly, the amount of gain or loss recognized by a Partnership
as a  result of  the Mergers  will  be not  be determined  by reference  to  the
purchase  price paid prior to  1996 by any Unitholder for  his or her Units. The
Partnerships may make an election under Code  Section 754 in 1996 to adjust  the
tax  basis  of  their  assets  to reflect  the  amount  paid  by  any Unitholder
purchasing his or her interest in the Partnerships during 1996. Any reduction in
gain or increase in  loss resulting from  this adjustment in  tax basis will  be
allocated  entirely  to such  purchasing  Unitholders. As  described  in greater
detail below, the basis that each Unitholder  will have in Shares received as  a
result  of the Mergers  will equal the  Unitholder's basis in  his or her Units,
adjusted to reflect any gain or loss recognized on the distribution of Shares or
cash to the Unitholder and any gain or loss allocated to him or her from his  or
her Partnership as a result of the Mergers.
 
    ALLOCATION  OF GAIN OR LOSS AMONG  PARTICIPATING UNITHOLDERS.  The amount of
gain or loss recognized by the Partnerships  in the year of the Mergers will  be
allocated  among their  respective Unitholders in  accordance with  the terms of
their respective Partnership Agreements. Pursuant to these terms, in the case of
Partnerships that recognize a gain or loss on the Mergers, each Unitholder  will
be allocated and must report its allocable share of such gain or loss.
 
    CHARACTERIZATION OF GAIN OR LOSS.  In general, gains or losses realized with
respect  to transfers of the assets of  each of the Partnerships will be treated
as realized from the sale  of a Code "Section  1231" asset (i.e., real  property
and  depreciable assets used in  a trade or business and  held for more than one
year). A Unitholder's share  of gains or  losses from the  sale of Section  1231
assets  of a Partnership would be combined with any other Section 1231 gains and
losses recognized by such Unitholder in that year. If the result is a net  loss,
such  loss is characterized  as an ordinary loss.  If the result  is a net gain,
such gain is characterized as a capital gain; provided, however, that such  gain
will   be  treated  as  ordinary  income   to  the  extent  the  Unitholder  has
"non-recaptured" Section  1231  losses.  For  these  purposes,  "non-recaptured"
Section  1231 losses means a Unitholder's  aggregate Section 1231 losses for the
five most  recent prior  years  that have  not  previously been  recaptured.  In
addition,  a Unitholder's  net gain  will be treated  as ordinary  income to the
extent such gain is attributable  to previously allowed depreciation  deductions
subject to recapture under Code Section 1245 or 1250.
 
    Each  Partnership  has incurred  syndication  costs in  connection  with its
initial  offering  of  the  Units.  In  connection  with  a  liquidation  of   a
partnership,  the IRS has  suggested that syndication costs  are deductible by a
partner only to the extent that the amount of cash liquidation proceeds received
by the partner are less  than the adjusted tax basis  of his or her  partnership
interest.  It  is  not  clear, therefore,  whether  Unitholders  will  realize a
deduction in connection with these syndication  expenditures as a result of  the
Merger.  Counsel  is of  the belief,  however,  that because  a Unitholder  of a
Partnership participating in a Merger is treated as having liquidated his or her
interest  in  the  Partnership,  the  Unitholder's  allocable  share  of   these
syndication  costs should  be deductible as  a capital  loss in the  year of the
Merger. This  capital  loss  is  generally  deductible  to  the  extent  of  the
Unitholder's  other  capital  gains  recognized during  the  year  including the
Unitholder's share of Section 1231 gain recognized in the Merger. The  estimates
provided in "Estimated Taxable Gain or Loss" reflect the taxable gain net of the
capital loss realized from the syndication expense.
 
    Any  gain recognized as a result of the  distribution of Shares or cash to a
Unitholder as described  below will  be treated as  capital gain  except to  the
extent  a portion of the gain is attributable to previously allowed depreciation
deductions subject to recapture under Code Section 1245 or 1250.
 
    For purposes of  the passive activity  rules of Code  Section 469, gains  or
losses recognized from transfers of the Partnerships' assets generally should be
treated  as passive activity income or loss. The Code provides that, in general,
a taxpayer who  disposes of his  or her  entire interest in  a passive  activity
during  a taxable year  is entitled to  treat the excess  of passive losses from
such activity
 
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(including such activity's suspended passive losses from prior periods plus  any
loss  recognized on  the disposition) over  that year's passive  income or gains
from all the taxpayer's activities as not being subject to passive activity loss
limitations. For this provision to apply, however, the taxpayer must dispose  of
his  or her entire  interest in the  passive activity to  an unrelated taxpayer.
Because a  Unitholder  who receives  Shares  in  the Company  has  a  continuing
indirect  interest in  the Partnership's activity  following the  Mergers, it is
uncertain whether the  Mergers will result  in a disposition  of a  Unitholder's
entire interest in the passive activity of a Partnership. Dissenting Unitholders
receiving  solely cash, however,  should be treated as  having disposed of their
entire interest in the Partnership and therefore should be able to utilize  this
provision of the Code.
 
    MERGERS  OF  THE  PARTNERSHIPS.   Upon  consummation  of  the  Mergers, each
Partnership will  cease to  exist and  will be  treated for  federal income  tax
purposes  as  distributing  to  its  Unitholders the  Shares  it  is  treated as
receiving in the Merger. The taxable year  of each Partnership will end at  such
time.  Assuming  the Closing  Date  is no  later  than December  31,  1996, each
Unitholder must report, in his or her taxable year that includes the Merger, his
or her  share  of  all  income,  gain,  loss,  deduction  and  credit  for  such
Partnership  for  the period  January 1,  1996  through the  date of  the Merger
(including his or her  allocable share of  the gain or  loss resulting from  the
Merger  described above). Accordingly, an  individual Unitholder would report on
his or her return for 1996 his or her share of all income, gain, loss, deduction
and credit for such Partnership, including any  gain or loss from the Merger.  A
Unitholder  whose taxable year differs from that of the Partnership's could have
a "bunching" of income from the Partnership and the Company because of the short
taxable year of the Partnership. However, a Unitholder whose taxable year is the
calendar year will not experience any "bunching" of income.
 
    DISTRIBUTION OF SHARES.  The distribution by a Partnership of Shares or cash
to a Unitholder will be  taxable to the Unitholder to  the extent that the  fair
market value of the Shares distributed to such Unitholder and the amount of cash
paid  as additional consideration or  in lieu of a  fractional Share exceeds the
adjusted tax basis of such Unitholder's interest in the Partnership  immediately
before  the distribution as adjusted by such Unitholder's allocable share of the
taxable gain or loss  recognized by the Partnership  in the Merger. Because  the
Shares  will be publicly  traded after the  Mergers, they are  treated for these
purposes in the same manner as cash to the extent of their fair market value  as
of  the date of  distribution. Notwithstanding the above,  a Unitholder will not
recognize a taxable loss  on the distribution  of the Shares  to the extent  the
fair  market  value of  the Shares  and the  amount of  cash paid  as additional
consideration or in lieu  of a fractional  Share is less  than the adjusted  tax
basis  of a Unitholder's interest  in the Partnership. Any  gain recognized as a
result of the distribution of Shares or cash to a Unitholder will be treated  as
capital  gain except  to the  extent a  portion of  the gain  is attributable to
previously allowed  depreciation  deductions  subject to  recapture  under  Code
Section 1245 or 1250.
 
    A  Unitholder who  receives Shares in  the Merger  will have a  basis in the
Shares equal  to the  sum of  (a) the  Unitholder's basis  in his  or her  Units
adjusted  by  such  Unitholder's  distributive  share  of  income,  gain,  loss,
deduction and credit for the  final taxable year of  the Partnership as well  as
distributions (including any cash paid as additional consideration or in lieu of
a  fractional  Share)  received  in  such final  taxable  year  (other  than the
distribution of Shares to the  Unitholder) and (b) the  amount of gain, if  any,
recognized  by  the Unitholder  on the  distribution and  receipt of  the Shares
pursuant to the  foregoing. A Unitholder's  holding period for  the Shares  will
begin on the date of the Merger.
 
    TAX CONSEQUENCES TO DISSENTING UNITHOLDERS.  A Unitholder subject to federal
income  tax who  exercises dissenters' rights  will recognize  taxable income or
loss equal to the difference between (a) the sum of the amount of cash  received
plus  the  amount  of the  Unitholder's  liabilities as  determined  pursuant to
Section 752 of the Code and (b) the  adjusted tax basis in his or her Units,  as
adjusted  immediately prior  to the  Merger. Any  gain or  loss recognized  by a
dissenting Unitholder will  be treated  as capital gain  or loss  except to  the
extent a portion of such gain is attributable to previously allowed depreciation
deductions subject to recapture under Code Section 1245 or 1250.
 
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    CONSEQUENCES  TO  TAX-EXEMPT UNITHOLDERS.   Based  on the  General Partners'
representation that the Partnerships'  assets are held  by the Partnerships  for
trade  or business purposes and not for sale to customers in the ordinary course
of a trade  or business, Counsel  is of the  opinion that the  Mergers will  not
result  in recognition of a  material amount of UBTI  by a tax-exempt Unitholder
that does not hold an interest in the Partnerships either as a dealer under Code
Section 512(b)(5)(B) or as "debt-financed  property" within the meaning of  Code
Section  514, and  is not  an organization  described in  Code Section 501(c)(7)
(social  clubs),  501(c)(9)   (voluntary  employee  beneficiary   associations),
501(c)(17)  (supplemental unemployment benefit  trusts) or 501(c)(20) (qualified
group legal services plans) regardless  of whether such Unitholder  participates
or exercises dissenters' rights in connection with the Mergers. The four classes
of  exempt organizations noted in the previous sentence may recognize a material
amount of gain or loss in the Mergers.
 
    TAX CONSEQUENCES TO  THE COMPANY.   The Company will  not recognize gain  or
loss as a result of the Mergers. The basis of the assets received by the Company
from  the Partnerships will equal the fair  market value of the Shares issued by
the Company in the Mergers, plus any cash paid by the Company in the Mergers  as
additional  consideration or in lieu  of fractional Shares or,  on behalf of the
Partnerships, to Unitholders  exercising dissenters'  rights and  the amount  of
Partnership  liabilities assumed  by the Company  in the  Mergers. The Company's
basis in  the  properties  may  differ from  the  Partnerships'  basis  in  such
properties  and the properties will be subject  to longer depreciable lives as a
result of the  Mergers. These  factors could result  in an  overall increase  or
decrease  in  the  depreciation deductions  attributable  to the  assets  of the
Partnerships following the Mergers.
 
TAXATION OF THE COMPANY AS A REIT
 
    GENERAL.  Unitholders participating  in the Mergers will  own shares in  the
Company.  The Company  has made  an election to  be taxed  as a  REIT under Code
Sections 856 through 860,  commencing with its taxable  year ended December  31,
1994.  The  Company  believes  that, commencing  with  its  taxable  year ending
December 31, 1994, it has been organized and has operated in such a manner as to
qualify for taxation as a REIT under  the Code. The Company intends to  continue
to  operate in such a manner, but no assurance can be given that it will operate
in a manner so as to qualify or remain qualified.
 
    These  sections  of  the  Code   are  highly  technical  and  complex.   The
determination  of  various factual  matters and  circumstances are  not entirely
within the control of  the Company and  may affect its ability  to qualify as  a
REIT.  The following summary  sets forth the  material aspects of  the Code that
govern the federal  income tax treatment  of a REIT  and its stockholders.  This
summary  is qualified in  its entirety by the  applicable Code provisions, rules
and  regulations  promulgated  thereunder,   and  administrative  and   judicial
interpretations thereof.
 
    If  the Company qualifies for  taxation as a REIT,  it generally will not be
subject to federal corporate  income taxes on its  net income that is  currently
distributed to stockholders. This treatment substantially eliminates the "double
taxation"  (at the  corporate and stockholder  levels) of  income that generally
results from investment in a regular corporation. The Company, however, will  be
subject to federal income and excise taxes as follows:
 
        (a)  The  Company  will  be  taxed at  regular  corporate  rates  on any
    undistributed REIT  taxable  income,  including  undistributed  net  capital
    gains.
 
        (b)  Under  certain circumstances,  the Company  may  be subject  to the
    "alternative minimum tax" on its items of tax preference.
 
        (c) If the Company has (i) net income from the sale or other disposition
    of "foreclosure property" that  is held primarily for  sale to customers  in
    the  ordinary course  of business  or (ii)  other nonqualifying  income from
    foreclosure property, it  will be subject  to tax at  the highest  corporate
    rate on such income.
 
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<PAGE>
        (d)  If the Company  has net income  from prohibited transactions (which
    are, in  general,  certain sales  or  other dispositions  of  property  held
    primarily  for sale  to customers in  the ordinary course  of business other
    than foreclosure property), such income will be subject to a 100% tax.
 
        (e) If the Company should fail to  satisfy the 75% gross income test  or
    the  95%  gross  income  test  (as  discussed  below),  but  has nonetheless
    maintained its qualification  as a REIT  because certain other  requirements
    have  been met, it will be  subject to a 100% tax  on an amount equal to (i)
    the gross income  attributable to  the greater of  the amount  by which  the
    Company  fails  the 75%  or  gross income  95%  test, multiplied  by  (ii) a
    fraction intended to reflect the Company's profitability.
 
        (f) If the Company should fail  to distribute during each calendar  year
    at  least the sum of (i) 85% of its REIT ordinary income for such year, (ii)
    95% of  its REIT  capital  gain net  income for  such  year, and  (iii)  any
    undistributed  taxable  income  from  prior periods,  the  Company  would be
    subject to a 4% excise tax on the excess of such required distribution  over
    the amounts actually distributed.
 
        (g)  With respect to any asset (a "Built-in Gain Asset") acquired by the
    Company from  a corporation  that is  or  has been  a C  corporation  (i.e.,
    generally,  a corporation  subject to  full corporate-level  tax) in certain
    transactions in which the basis of the  Built-in Gain Asset in the hands  of
    the Company is determined by reference to the basis period (the "Recognition
    Period")  beginning on  the date  on which  such asset  was acquired  by the
    Company, then, to the extent of the "Built-in Gain" (i.e., the excess of (i)
    the fair market value of such  asset over (ii) the Company's adjusted  basis
    in  such asset, determined  as of the beginning  of the Recognition Period),
    such gain  will be  subject to  tax at  the highest  regular corporate  rate
    pursuant  to Treasury  Regulations that have  not yet  been promulgated. The
    results described above  with respect  to the recognition  of built-in  gain
    assume  that the Company will  make or has made  an election pursuant to IRS
    Notice 88-19.
 
    On March 19,  1996, President Clinton  submitted to Congress  a budget  bill
that  includes a  proposal to  require large  C corporations  (defined as  any C
corporation having aggregate  stock value  greater than  $5,000,000) that  after
December  31, 1996  either convert  to REIT status  or are  acquired by existing
REITs in otherwise qualified reorganizations under Code Section 368 to recognize
any Built-in Gain at the time of  the conversion or acquisition. As of the  date
of  this Proxy  Statement/ Prospectus,  no further  legislative action  has been
taken with respect to this proposal.
 
    REQUIREMENTS FOR QUALIFICATION.  The Code  defines a REIT as a  corporation,
trust  or association (i) that is managed  by one or more trustees or directors,
(ii) the beneficial ownership of which  is evidenced by transferable shares,  or
by transferable certificates of beneficial interest, (iii) that would be taxable
as  a domestic corporation, but for Code  Sections 856 through 859, (iv) that is
neither a  financial institution  nor an  insurance company  subject to  certain
provisions  of the Code, (v) the beneficial ownership of which is held by 100 or
more persons, (vi) during the last half  of each taxable year not more than  50%
in value of the outstanding stock of which is owned, directly or constructively,
by  five  or  fewer individuals  (as  defined  in the  Code  to  include certain
entities), and (vii) that meets certain other tests, described below,  regarding
the  nature of its income  and assets. The Code  provides that conditions (i) to
(iv), inclusive, must be met during  the entire taxable year and that  condition
(v)  must be met  during at least  335 days of  a taxable year  of 12 months, or
during a proportionate part of a taxable year of less than 12 months. Conditions
(v) and (vi)  will not apply  until after the  first taxable year  for which  an
election is made to be taxed as a REIT.
 
    The  Company has issued sufficient shares  to allow it to satisfy conditions
(v) and (vi). In addition,  the Company's Certificate of Incorporation  provides
for  restrictions  regarding  the transfer  and  ownership of  its  stock, which
restrictions are intended  to assist the  Company in continuing  to satisfy  the
stock  ownership requirements described  in conditions (v)  and (vi) above. Such
transfer and ownership  restrictions are  described in  "Description of  Capital
Stock -- Restrictions on Transfers of Capital
 
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<PAGE>
Stock; Excess Stock." There can be no assurance, however, that such transfer and
ownership  restrictions will,  in all  cases, prevent  a violation  of the stock
ownership provisions described in conditions (v) and (vi) above.
 
    INCOME TESTS.   In order to  maintain qualification as  a REIT, the  Company
must  satisfy annually three  gross income requirements. First,  at least 75% of
the Company's gross income (excluding gross income from prohibited transactions)
for each taxable year  must be derived directly  or indirectly from  investments
relating  to real property or mortgages  on real property (including "rents from
real property" and, in certain circumstances, interest) or from certain types of
temporary investments.  Second,  at least  95%  of the  Company's  gross  income
(excluding gross income from prohibited transactions) for each taxable year must
be  derived from  such real property  investments, dividends,  interest and gain
from the sale or disposition of stock or securities (or from any combination  of
the  foregoing). Third,  short-term gain from  the sale or  other disposition of
stock or securities, gain from prohibited  transactions and gain on the sale  or
other  disposition of real  property held for  less than four  years (apart from
involuntary conversions and sales of  foreclosure property) must represent  less
than  30% of the Company's gross  income (including gross income from prohibited
transactions) for each taxable year.
 
    Rents  received  by  the  Company  on  the  lease  of  self-service  storage
facilities  will qualify as  "rents from real property"  in satisfying the gross
income requirements for a  REIT described above only  if several conditions  are
met.  First, the amount  of rent must  not be based  in whole or  in part on the
income or  profits  of  any  person. However,  an  amount  received  or  accrued
generally  will not be excluded from the  term "rents from real property" solely
by reason of being  based on a  fixed percentage or  percentages of receipts  or
sales.  Second, the  Code provides  that rents received  from a  tenant will not
qualify as "rents from  real property" in satisfying  the gross income tests  if
the  REIT, or an  owner of 10% or  more of the  REIT, actually or constructively
owns 10% or  more of  such tenant  (a "Related  Party Tenant").  Third, if  rent
attributable  to personal  property, leased in  connection with a  lease of real
property, is greater than 15% of the  total rent received under the lease,  then
the  portion of rent attributable to such  personal property will not qualify as
"rents from real property."  The Company does not  anticipate charging rent  for
any  portion of any property that is based in  whole or in part on the income or
profits of any person,  and the Company does  not anticipate receiving rents  in
excess  of  a de  minimis amount  from Related  Party Tenants.  Furthermore, the
Company does  not lease  personal  property in  connection  with its  rental  of
self-service storage facilities.
 
    Finally,  for rents received  to qualify as "rents  from real property," the
Company generally must not operate or  manage the property or furnish or  render
services  to the  tenants of  such property,  other than  through an independent
contractor from whom the  REIT derives no revenue;  provided, however, that  the
REIT  may directly  perform certain  services that  are "usually  or customarily
rendered" in connection with the rental of space for occupancy only and are  not
otherwise  considered "rendered  to the occupant"  of the  property. The Company
performs or "self-administers" the property management activities for properties
it owns. The Company has obtained a private letter ruling from the IRS providing
that the property management services rendered by the Company will not adversely
affect the  characterization of  the  Company's rents  from real  property.  The
ruling  is based on a description of  those management services performed by the
Company in connection  with its own  properties, including maintenance,  repair,
lease  administration and  accounting, and  security. The  ruling also considers
certain ancillary services  to be  directly performed  by the  Company, such  as
truck rentals and inventory sales. The ruling provides that such services do not
otherwise adversely affect the characterization of the rental income received by
the  Company. Nonetheless, income from truck rentals and certain other ancillary
services do not qualify under these gross income tests ("Nonqualifying Income").
The Company has represented that the services to be rendered by the Company with
respect to the Partnerships' properties  acquired in the Mergers are  consistent
with  those management services  described in the ruling.  In addition, the fees
and consideration  received by  the Company  for performance  of management  and
administrative  services with  respect to properties  that are not  owned by the
Company will  also be  treated as  Nonqualifying Income.  Such income  will  not
qualify
 
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under  either the  75% or  95% gross  income test  and may  adversely affect the
Company's continued  qualification as  a  REIT. The  Company believes  that  the
aggregate  amount of the service income  (and any other Nonqualifying Income) in
any taxable year will  not exceed the limits  on Nonqualifying Income under  the
gross income tests described above.
 
    The  term  "interest"  generally does  not  include any  amount  received or
accrued (directly or indirectly) if the determination of such amount depends  in
whole  or in  part on the  income or profits  of any person.  However, an amount
received or accrued  generally will  not be  excluded from  the term  "interest"
solely by reason of being based on a fixed percentage or percentages of receipts
or sales.
 
    If  the Company fails to satisfy one or both of the 75% and 95% gross income
tests for any taxable year, it may nevertheless qualify as a REIT for such  year
if  it is entitled to relief under  certain provisions of the Code. These relief
provisions will be  generally available if  the Company's failure  to meet  such
tests  was due to reasonable  cause and not due  to willful neglect, the Company
attaches a schedule of the sources of its income to its return and any incorrect
information on the schedule was not due  to fraud with the intent to evade  tax.
It  is not possible, however, to state  whether in all circumstances the Company
would be entitled to the benefit of these relief provisions. As discussed  above
in  "-- General," even if these relief  provisions apply, a tax would be imposed
with respect to the excess net income.
 
    ASSET TESTS.  The Company, at the close of each quarter of its taxable year,
must also satisfy three tests  relating to the nature  of its assets. First,  at
least 75% of the value of the Company's total assets must be represented by real
estate  assets (including (i) its allocable share of the real estate assets held
by partnerships in which  the Company owns  an interest and  (ii) stock or  debt
instruments  held for not  more than one  year purchased with  the proceeds of a
stock offering or long-term  (at least five years)  public debt offering of  the
Company),  cash, cash items and government securities. Second, not more than 25%
of the Company's total assets may be represented by securities other than  those
in  the 75%  asset class. Third,  of the  investments included in  the 25% asset
class, the value of  any one issuer's  securities owned by  the Company may  not
exceed 5% of the value of the Company's total assets and the Company may not own
more than 10% of any one issuer's outstanding voting securities.
 
    The  Company owns interests in several  subsidiary partnerships. In the case
of a REIT that is a partner in a partnership, Treasury Regulations provide  that
the  REIT will  be deemed to  own its proportionate  share of the  assets of the
partnership and will be deemed to be  entitled to the income of the  partnership
attributable  to such share. In addition, the  character of the assets and gross
income of the partnership shall  retain the same character  in the hands of  the
REIT  for purposes  of Code Section  856, including satisfying  the gross income
tests and the asset tests.
 
    The treatment  for partnerships  is conditioned  on the  treatment of  these
entities  as  partnerships  for  federal  income  tax  purposes  (as  opposed to
associations or  publicly traded  partnerships taxable  as corporations).  If  a
partnership  is treated as an association, it would be taxable as a corporation.
Furthermore, if  a  partnership  is publicly  traded,  it  will be  taxed  as  a
corporation  unless at  least 90%  of its gross  income is  derived from certain
qualifying sources  including real  property  rents. In  such situations,  if  a
REIT's  ownership in any partnership taxed as  a corporation exceeded 10% of the
partnership's voting interest or the value  of such interest exceeded 5% of  the
value  of  the  REIT's  assets, the  REIT  would  cease to  qualify  as  a REIT.
Furthermore, in such situations, distributions  from any of the Partnerships  to
the  Company would be treated as dividends,  which are not taken into account in
satisfying the 75% gross income test described above and which could, therefore,
make it more difficult  for the REIT  to qualify for the  taxable year in  which
such  distributions are received. In addition,  in such situations, the interest
in any of the Partnerships  held by the REIT would  not qualify as "real  estate
assets,"  which could make it more difficult for  the REIT to meet the 75% asset
test described above. Finally, in such situations, the REIT would not be able to
deduct its share of  any losses generated by  the Partnerships in computing  its
taxable income. The Company believes that
 
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each  of the partnerships in  which it owns an interest  will be treated for tax
purposes as a partnership (and not as an association taxable as a  corporation).
Nonetheless,  there  can  be no  assurance  that  the IRS  may  not successfully
challenge the tax status of any of these partnerships.
 
    ANNUAL DISTRIBUTION REQUIREMENTS.   The Company,  in order to  qualify as  a
REIT, is required to distribute dividends (other than capital gain dividends) to
the  stockholders in an amount at  least equal to (a) the  sum of (i) 95% of the
Company's REIT taxable  income (computed  without regard to  the dividends  paid
deduction  and  the  Company's net  capital  gain  (as defined  in  Code Section
857(b)(2), the "REIT  Taxable Income")) and  (ii) 95% of  the net income  (after
tax),  if any, from foreclosure property, minus  (b) the sum of certain items of
noncash income. In addition, if the Company disposes of any Built-in Gain  Asset
during  its  Recognition  Period,  the Company  will  be  required,  pursuant to
Treasury Regulations that have not yet been promulgated, to distribute at  least
95%  of the Built-in Gain (after tax),  if any, recognized on the disposition of
such asset. Such distributions must  be paid in the  taxable year to which  they
relate,  or in the following taxable year  if declared before the Company timely
files its tax return for  such year and if paid  on or before the first  regular
dividend payment after such declaration. To the extent that the Company does not
distribute  all of its  net capital gain  or distributes at  least 95%, but less
than 100%, of its REIT  Taxable Income, as adjusted, it  will be subject to  tax
thereon  at regular ordinary  and capital gain corporate  tax rates. The Company
intends  to  make  timely  distributions  sufficient  to  satisfy  these  annual
distribution requirements.
 
    It  is possible that the Company, from time to time, may not have sufficient
cash or  other liquid  assets to  meet the  distribution requirements  described
above  due to timing  differences between (i)  the actual receipt  of income and
actual payment of deductible expenses and (ii) the inclusion of such income  and
deduction  of such expenses in arriving at taxable income of the Company. In the
event that such  timing differences  occur, in  order to  meet the  distribution
requirements,  the Company may  find it necessary to  arrange for short-term, or
possibly long-term, borrowings or to pay dividends in the form of taxable  stock
dividends.
 
    If,  as a result of an adjustment by the IRS, the Company would fail to meet
the above distribution requirements  for a particular year,  the Company may  be
able   to  rectify  such  failure  by   paying  "deficiency  dividends"  to  the
stockholders in a later year, which  may be included in the Company's  deduction
for  dividends paid for the earlier year. Thus, the Company may be able to avoid
being taxed on amounts distributed as deficiency dividends; however, the Company
will be required to pay interest based on the amount of any deduction taken  for
deficiency dividends.
 
    Furthermore,  if the Company should fail  to distribute during each calendar
year at least the sum of (i) 85% of its REIT ordinary income for such year, (ii)
95% of its REIT capital gain income  for such year, and (iii) any  undistributed
taxable  income from prior periods,  the Company will be  subject to a 4% excise
tax on  the excess  of  such required  distribution  over the  amounts  actually
distributed.
 
    FAILURE  TO QUALIFY.  If the Company fails to qualify for taxation as a REIT
in any taxable year, and the relief provisions do not apply, the Company will be
subject to tax (including any applicable alternative minimum tax) on its taxable
income at regular corporate rates. Distributions to the stockholders in any year
in which the Company fails to qualify will not be deductible by the Company  nor
will distributions be required to be made. As a result, the Company's failure to
qualify as a REIT will reduce the cash available for distribution by the Company
to the stockholders. In addition, if the Company fails to qualify as a REIT, all
distributions  to the  stockholders will  be taxable  as ordinary  income to the
extent of current and accumulated earnings and profits, and, subject to  certain
limitations  of  the  Code,  corporate  distributees  may  be  eligible  for the
dividends received deduction. Unless entitled to relief under specific statutory
provisions, the Company will  also be disqualified from  taxation as a REIT  for
the  four taxable years following the  year during which qualification was lost.
It is not possible to  state whether in all  circumstances the Company would  be
entitled to such statutory relief.
 
    TAXATION  OF TAXABLE STOCKHOLDERS.   As long  as the Company  qualifies as a
REIT, distributions made to the Company's taxable stockholders out of current or
accumulated earnings and profits (and
 
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not designated as capital gain dividends) will be taken into account by them  as
ordinary  income and will  not be eligible for  the dividends received deduction
for corporations. Distributions  that are designated  as capital gain  dividends
will  be taxed as long-term  capital gain (to the extent  they do not exceed the
Company's actual net capital  gain for the taxable  year) without regard to  the
period  for  which  the  stockholder has  held  its  shares.  However, corporate
stockholders may  be  required  to treat  up  to  20% of  certain  capital  gain
dividends as ordinary income. Distributions in excess of current and accumulated
earnings  and profits will  not be taxable  to a stockholder  to the extent that
they do not exceed  the adjusted basis of  the stockholder's shares, but  rather
will  reduce  the  adjusted  basis  of such  shares.  To  the  extent  that such
distributions exceed the adjusted basis of  a stockholder's shares they will  be
included  in income as long-term capital gain (or short-term capital gain if the
shares have been held for  one year or less) assuming  the shares are a  capital
asset in the hands of the stockholder. In addition, any dividend declared by the
Company in October, November or December of any year payable to a stockholder of
record  on a specified date in  any such month shall be  treated as both paid by
the Company  and  received by  the  stockholder on  December  31 of  such  year;
provided,  however, that  the dividend  is actually  paid by  the Company during
January of the following  calendar year. Stockholders may  not include in  their
individual  income tax returns any net operating losses or capital losses of the
Company.
 
    Distributions paid to stockholders  will constitute portfolio income  (i.e.,
income  from dividends that is not derived in  the ordinary course of a trade or
business) for purposes  of Code  Section 469  and not  passive activity  income.
Accordingly, such income will not be subject to reduction by losses from passive
activities  (e.g., any interest in a trade  or business held by a stockholder in
which the stockholder does not  materially participate) of stockholders who  are
subject  to the  passive activity  loss rules.  However, income  attributable to
distributions may be  offset by  investment expense deductions,  subject to  the
limitation  that  individual investors  may  only deduct  miscellaneous itemized
deductions (including investment expense) to  the extent such deductions  exceed
2% of the investor's adjusted gross income.
 
    Gain  or loss recognized by a stockholder  who is not a dealer in securities
on the sale of shares that have been held for more than one year will  generally
be  taxable as  long-term capital  gain or  loss. Furthermore,  if a stockholder
sells shares  that were  held for  six months  or less  (after applying  certain
holding  period rules) and with respect to which a capital gain distribution was
received, any loss on the sale up to the amount of the capital gain distribution
will be treated as long-term capital loss.
 
    TAXATION OF  TAX-EXEMPT  STOCKHOLDERS.    The IRS  has  ruled  that  amounts
distributed  as  dividends  by a  qualified  REIT  do not  constitute  UBTI when
received by  a  tax-exempt  entity.  Based  on  that  ruling,  provided  that  a
tax-exempt  stockholder (except certain tax-exempt stockholders described below)
has not held  its shares of  Common Stock or  Units it exchanged  for Shares  as
"debt-financed property" within the meaning of the Code and the shares of Common
Stock  are not otherwise  used in an  unrelated trade or  business, the dividend
income from the Company will not be UBTI to a tax-exempt stockholder. Similarly,
income from the sale of shares of  Common Stock will not constitute UBTI  unless
such  tax-exempt stockholder  has held  such shares  as "debt-financed property"
within the  meaning of  Code  Section 514  or is  a  dealer under  Code  Section
512(b)(5)(B).
 
    For  tax-exempt  stockholders  that  are  social  clubs,  voluntary employee
benefit associations,  supplemental unemployment  benefit trusts  and  qualified
group  legal  services  plans exempt  from  federal income  taxation  under Code
Section 501(c)(7), (c)(9),  (c)(17) and  (c)(20), respectively,  income from  an
investment  in the Company will constitute  UBTI unless the organization is able
to properly deduct amounts set aside  or placed in reserve for certain  purposes
so  as to  offset the income  generated by  its investment in  the Company. Such
prospective investors should  consult their  own tax  advisors concerning  these
"set aside" and reserve requirements.
 
    Notwithstanding  the above,  however, a portion  of the dividends  paid by a
"pension held  REIT" shall  be treated  as  UBTI as  to any  trust that  (i)  is
described in Code Section 401(a), (ii) is tax-exempt
 
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under  Code  Section 501(a)  and (iii)  holds more  than 10%  (by value)  of the
interests in  the REIT.  Tax-exempt pension  funds that  are described  in  Code
Section 401(a) are referred to below as "qualified trusts."
 
    A REIT is a "pension held REIT" if (i) it would not have qualified as a REIT
but  for  the fact  that Code  Section  856(h)(3) provides  that stock  owned by
qualified trusts shall be  treated, for the purposes  of the "not closely  held"
requirement,  as owned  by the  beneficiaries of the  trust (rather  than by the
trust itself), and (ii) either (a) at least one such qualified trust holds  more
than  25%  (by value)  of the  interests in  the REIT  or (b)  one or  more such
qualified trusts, each of which owns more  than 10% (by value) of the  interests
in  the REIT, hold in the aggregate more than 50% (by value) of the interests in
the REIT. The Company believes that it has not been, and will not be immediately
following the Closing  Date, a  "pension held REIT"  within the  meaning of  the
Code.
 
    TAXATION OF FOREIGN STOCKHOLDERS.  The rules governing U.S. income, gift and
estate taxation of foreign entities and individuals who are neither citizens nor
residents of the United States are complex. They depend not only on U.S. federal
and  state income, gift and estate tax  principles, but also on the treaties, if
any, between the  United States  and the  country of  the nonresident  investor.
Accordingly,  no  attempt will  be made  in  this Proxy  Statement/Prospectus to
provide more than a brief summary of certain rules relating to the Mergers.  All
foreign Unitholders should consult their own tax advisors as to the treatment of
the  Mergers and the ownership of Shares  and the operation of the Company under
the tax laws applicable to them.
 
    The  Foreign  Investment  in  Real  Property  Tax  Act  of  1980  ("FIRPTA")
introduced  special rules applicable to foreign investors in U.S. real property.
FIRPTA generally subjects  foreign investors  to U.S. taxation  at regular  U.S.
rates  on the gain from the sale by such foreign investors of U.S. real property
interests ("USRPIs"), which include (i) U.S.  real estate and (ii) interests  in
certain  entities (including partnerships) holding U.S. real estate. FIRPTA also
imposes withholding on such sales.
 
    Code Section  702(b) determines  the  character of  an  item included  in  a
partner's  distributive share of gain  realized by a partnership  as if the item
were realized directly from the source from  which the item was realized by  the
partnership.  Therefore, if a partnership sells  a USRPI, FIRPTA should apply as
if the foreign partner had  sold the USRPI directly.  The Company, based on  the
advice   of  Counsel,  believes  that  substantially   all  the  assets  in  the
Partnerships consist of USRPIs. Accordingly, each foreign Unitholder should take
into account  its  distributive  share of  any  gain  or loss  recognized  by  a
Partnership  on its disposition of the USRPIs in the Mergers, and, consequently,
the foreign Unitholder should be subject  to tax upon its distributive share  of
any such gain.
 
    Under  FIRPTA, a domestic partnership  must withhold tax at  the rate of 35%
with respect  to the  partnership's gain  recognized on  the disposition  of  an
USRPI,  to  the extent  such  gain is  allocable  to a  foreign  partner. FIRPTA
withholding, however, is superseded to the extent the withholding rules of  Code
Section  1446 apply. Code  Section 1446 requires partnerships  to withhold, at a
39.6% rate  with respect  to noncorporate  foreign partners  and 35%  rate  with
respect to corporate foreign partners, on "effectively connected taxable income"
allocable to foreign partners. Withholding arises under Code Section 1446 from a
foreign partner's distributive share of the income from a disposition of a USRPI
since  FIRPTA characterizes  gain as  effectively connected  income. Any amounts
withheld in respect of a foreign partner are treated as a credit against the tax
liability of each such foreign partner  for the partner's taxable year in  which
the  partner  is subject  to U.S.  tax on  the income  to which  the withholding
relates. Withheld amounts are treated as a  distribution on the last day of  the
partnership taxable year for which the withheld amount was paid (or, if earlier,
on the last day on which the partner owned an interest in the partnership).
 
    To  satisfy the above withholding obligation  with respect to the Mergers, a
Partnership may retain and place in  an escrow account, or similar  arrangement,
the  shares or cash to be received by  a foreign Unitholder, pending a sale of a
portion of the shares sufficient  to satisfy the withholding or,  alternatively,
the  receipt of an amount of cash  from the Unitholder sufficient to satisfy the
withholding.
 
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    BACKUP WITHHOLDING.  The Company will report to the stockholders and the IRS
the amount of dividends paid  during each calendar year,  and the amount of  tax
withheld,  if any.  Under the  backup withholding  rules, a  stockholder will be
subject to  backup withholding  equal to  31% of  the dividend  paid unless  the
stockholder (i) is a corporation or comes within certain other exempt categories
and,  when  required,  demonstrates  this  fact  or  (ii)  provides  a  taxpayer
identification number,  certifies  as  to  no  loss  of  exemption  from  backup
withholding  and otherwise complies  with applicable requirements  of the backup
withholding rules. A  stockholder that  does not  provide the  Company with  its
correct  taxpayer identification number may also be subject to penalties imposed
by the IRS. Any amount paid as backup withholding will be creditable against the
stockholder's income tax liability. In addition, the Company may be required  to
withhold  a portion of  capital gain distributions made  to any stockholders who
fail to certify their nonforeign status to the Company.
 
    STATE AND  LOCAL TAXES  AND  WITHHOLDING.   Unitholders  may be  subject  to
taxation  by state or  local jurisdictions, including those  states in which the
Partnerships in which they are a partner own real property or transact business,
on their allocable share of income  or loss of such Partnerships, including  any
gain  or  loss arising  from  the Mergers.  In  addition, certain  states impose
withholding  obligations   on   the   Partnerships  in   connection   with   the
above-described taxes. To satisfy this withholding obligation, a Partnership may
retain  and place in an  escrow account, or similar  arrangement, the shares and
cash, if any, to be received by a Unitholder, pending a sale of a portion of the
shares sufficient to satisfy the  withholding or, alternatively, the receipt  of
an amount of cash from the Unitholder sufficient to satisfy the withholding. The
Company  and its  stockholders will  be subject  to state  or local  taxation in
various state  or local  jurisdictions,  including those  in  which it  or  they
transact  business  or  reside.  The  state  and  local  tax  treatment  of  the
Unitholders, the Partnerships, the Company and its stockholders may not  conform
to   the  federal   income  tax  consequences   discussed  above.  Consequently,
Unitholders should consult their own tax advisors regarding the effect of  state
and local tax laws on the Mergers and on an investment in the Company.
 
                                 LEGAL MATTERS
 
    Latham  & Watkins,  Costa Mesa, California  has delivered an  opinion to the
effect that, upon the consummation of  the Mergers, the Shares offered  pursuant
to  this  Proxy  Statement/Prospectus will  be  validly issued,  fully  paid and
nonassessable. Perkins Coie, Seattle, Washington has delivered an opinion to the
effect that the  discussion under "Material  Federal Income Tax  Considerations"
fairly  summarizes the federal  income tax considerations that  are likely to be
material to a Unitholder whose Units are exchanged for Shares in a Merger.
 
                                    EXPERTS
 
    The  financial   statements  incorporated   by  reference   in  this   Proxy
Statement/Prospectus  from  the Company's  Annual Report  on  Form 10-K  for the
fiscal year  ended  December  31,  1995 and  the  financial  statements  of  the
Partnerships  for  the years  ended December  31, 1995,  1994 and  1993 included
herein have been  audited by  Deloitte &  Touche LLP,  independent auditors,  as
stated  in their reports which are incorporated herein by reference with respect
to the Company and  included herein with respect  to the Partnerships, and  have
been so incorporated or included in reliance upon the reports of such firm given
upon their authority as experts in accounting and auditing.
 
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                               GLOSSARY OF TERMS
 
    Certain  capitalized terms used in  this Proxy Statement/Prospectus have the
following meanings unless the context otherwise requires:
 
    "ACQUISITION AGREEMENT" means the Acquisition Agreement dated as of July  1,
1996 by and among the Company and the Partnerships.
 
    "ADDITIONAL CONSIDERATION" means the additional cash consideration which may
be paid by the Company if the Share Price is less than $21.50, calculated as the
difference  between the actual Share Price  and $21.50, multiplied by the number
of Shares to be issued in the applicable Merger.
 
    "ALEX. BROWN" means Alex. Brown  & Sons Incorporated, the financial  advisor
to the Special Committee.
 
    "ALEX.  BROWN OPINION" means the  opinion rendered by Alex.  Brown as to the
fairness to the Company,  from a financial point  of view, of the  consideration
payable by the Company in the Offers and the Mergers.
 
    "ALLOCATED  TRANSACTION EXPENSES" means 50% of the Shared Expenses allocated
among the Partnerships pro rata based upon their relative Net Asset Value.
 
    "APPRAISALS" means the  Summary Portfolio  Appraisal Report  dated June  26,
1996 relating to the Partnerships' real estate portfolios.
 
    "APPRAISED  VALUE" means the appraised fair market values of the real estate
assets of each Partnership as of December 31, 1995 set forth in the Appraisals.
 
    "BYLAWS" means the Bylaws of the Company, as amended.
 
    "CERTIFICATE OF INCORPORATION" means the Certificate of Incorporation of the
Company, as amended and restated.
 
    "CLASS B  COMMON STOCK"  means Class  B Common  Stock, par  value $.001  per
share, of the Company.
 
    "CLOSING  DATE" means the day on which  the closing of the applicable Merger
occurs.
 
    "CLOSING NET ASSET VALUE" with respect to each Partnership means (i) the sum
of (a)  the Appraised  Value,  (b) the  cost incurred  to  the Closing  Date  of
buildouts and unit conversions, if any, that were not reflected in the Appraised
Value,  and  (c) the  book  values of  the  non-real estate  assets,  except for
amortizable assets, of the Partnership as of the Closing Date of the  applicable
Merger, less (ii) the sum of (x) the Partnership's liabilities as of the Closing
Date,  (y)  the estimated  costs remaining  to be  incurred, if  any, as  of the
Closing Date to complete the buildouts  and unit conversions that were  included
in  the Appraised  Value and (z)  the Partnership's Individual  Expenses and pro
rata share of Shared Expenses.
 
    "CODE" means the Internal Revenue Code of 1986, as amended.
 
    "COMMISSION" means the Securities and Exchange Commission.
 
    "COMMON STOCK" means Class A Common Stock, par value $.001 per share, of the
Company, together with certain associated preferred stock purchase rights.
 
    "COMPANY" means Shurgard Storage Centers, Inc., a Delaware corporation.
 
    "CONSOLIDATION" means the consolidation on March 1, 1994 of 17 publicly held
real estate limited partnerships that were sponsored by the Management Company.
 
    "CONTINGENT SHARES AGREEMENT"  means the  agreement, dated  March 24,  1995,
between  the Company and the former shareholders of the Management Company, made
in connection with the Management Company Merger, whereby the former  Management
Company shareholders are entitled
 
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to  receive  shares  of  Common Stock  upon  the  sale or  transfer  of,  or the
occurrence of certain other events with  respect to, the Company's interests  in
certain limited partnerships formerly owned by the Management Company, including
the Partnerships.
 
    "DISSENTERS' RIGHTS STATUTE" means Section 25.10.900 et seq. of the WULPA.
 
    "DISSOLUTION"  means a dissolution  of a Partnership  in accordance with its
Partnership Agreement.
 
    "EFFECTIVE TIME" means, with respect to each Partnership, the effective time
of the applicable Merger.
 
    "EVEREST" means Everest Storage Investors, LLC.
 
    "EVEREST TENDER OFFER" means  a tender offer for  Units of the  Partnerships
commenced by Everest on February 28, 1996.
 
    "EVEREST  TENDERED UNITS" means  the 1,816.5 IDS1  Units, 1,913.5 IDS2 Units
and 1,582.5 IDS3 Units acquired by Everest through the Everest Tender Offer.
 
    "EVEREST UNITS" means the  total of 1,824.5 ISD1  Units, 2,038.3 IDS2  Units
and 1,602.5 IDS3 Units acquired by PS from Everest.
 
    "EXCESS  STOCK" means any Common Stock transferred in violation of the Board
of Directors of the Company stopping transfer and/or redeeming shares of  Common
Stock  under certain conditions  specified in the  Certificate of Incorporation.
Such Excess Stock has no voting or  distribution rights and the Company has  the
power to purchase or direct its sale.
 
    "EXCHANGE ACT" means the Securities Exchange Act of 1934, as amended.
 
    "FFO" or "FUNDS FROM OPERATIONS" means net income before extraordinary items
(determined  in accordance with GAAP, plus depreciation and amortization related
to real  estate  activities, plus  or  minus certain  nonrecurring  revenue  and
expenses.
 
    "GAAP" means generally accepted accounting principles.
 
    "GENERAL  PARTNER  UNDERTAKING"  means  an  agreement  between  the  General
Partners and the Company pursuant to  which the General Partners agreed to  make
the  recommendations to Unitholders contained in this Proxy Statement/Prospectus
and agreed not to  withdraw such recommendations except  in accordance with  the
discharge of their fiduciary duties and as otherwise required by law.
 
    "GENERAL  PARTNER"  means, with  respect to  each  of the  Partnerships, the
entity serving as the general partner of that Partnership.
 
    "GP AGREEMENTS" means the  Agreement of Limited Partnership  of each of  the
General Partners.
 
    "GP   INTERESTS"  means  the  General  Partner   interest  of  each  of  the
Partnerships.
 
    "IDS1" means IDS/Shurgard Income Growth Partners L.P., a Washington  limited
partnership.
 
    "IDS1  GENERAL PARTNER" means Shurgard Associates L.P., a Washington limited
partnership and the general partner of IDS1.
 
    "IDS1 MERGER" means the merger of IDS1 with and into the Company.
 
    "IDS1 OFFER" means a cash  tender offer by the Company  for up to 65,000  of
the outstanding IDS1 Units at $257 net per IDS1 Unit.
 
    "IDS1  SPECIAL MEETING"  means the  special meeting  of holders  of the IDS1
Units to be held on           , 1996, at 10:00  a.m., local time, at 1201  Third
Avenue, Suite 2200, Seattle, Washington.
 
    "IDS1 UNITHOLDERS" means the holders of IDS1 Units.
 
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    "IDS1 UNITS" means units of limited partnership interest in IDS1.
 
    "IDS2"  means  IDS/Shurgard Income  Growth  Partners L.P.  II,  a Washington
limited partnership.
 
    "IDS2 GENERAL  PARTNER"  means Shurgard  Associates  L.P. II,  a  Washington
limited partnership and the general partner of IDS2.
 
    "IDS2 MERGER" means the merger of IDS2 with and into the Company.
 
    "IDS2  OFFER" means a cash  tender offer by the Company  for up to 49,000 of
the outstanding IDS2 Units at $222 net per IDS2 Unit.
 
    "IDS2 SPECIAL MEETING"  means the  special meeting  of holders  of the  IDS2
Units  to be held on           , 1996, at 10:00  a.m., local time, at 1201 Third
Avenue, Suite 2200, Seattle, Washington.
 
    "IDS2 UNITHOLDERS" means the holders of IDS2 Units.
 
    "IDS2 UNITS" means units of limited partnership interest in IDS2.
 
    "IDS3" means  IDS/Shurgard Income  Growth Partners  L.P. III,  a  Washington
limited partnership.
 
    "IDS3  GENERAL  PARTNER" means  Shurgard Associates  L.P. III,  a Washington
limited partnership and the general partner of IDS3.
 
    "IDS3 MERGER" means the merger of IDS3 with and into the Company.
 
    "IDS3 OFFER" means a cash  tender offer by the Company  for up to 52,000  of
the outstanding IDS3 Units at $308 net per IDS3 Unit.
 
    "IDS3  SPECIAL MEETING"  means the  special meeting  of holders  of the IDS3
Units to be held on           , 1996, at 10:00  a.m., local time, at 1201  Third
Avenue, Suite 2200, Seattle, Washington.
 
    "IDS3 UNITHOLDERS" means the holders of IDS3 Units.
 
    "IDS3 UNITS" means units of limited partnership interest in IDS3.
 
    "INDIVIDUAL  EXPENSES" means  expenses, including  legal fees  and expenses,
fees and expenses of investment bankers and other financial advisors, the  costs
of  the  Appraisals and  transfer  fees payable  by  the Company  for  the Units
acquired through the Offers. Individual Expenses incurred by the Company will be
paid by the Company  and Individual Expenses incurred  by a Partnership will  be
paid by the Partnership.
 
    "IPSC"  means IDS Partnership Services  Corporation, a Minnesota corporation
and a limited partner of each of the General Partners.
 
    "IRS" means the Internal Revenue Service.
 
    "MANAGEMENT COMPANY" means Shurgard Incorporated, which was merged with  and
into the Company on March 24, 1995.
 
    "MANAGEMENT  COMPANY MERGER" means the merger of the Management Company with
and into the Company on March 24, 1995.
 
    "MANAGEMENT SERVICES AGREEMENTS"  means the  Management Services  Agreements
between each of the Partnerships and the Company.
 
    "MERGER CONSIDERATION" means the Shares to be issued and the cash to be paid
in lieu of fractional shares of Common Stock and as Additional Consideration, if
any, in the applicable Merger.
 
    "MERGERS"  means the  merger of the  Partnerships with and  into the Company
pursuant to the Acquisition Agreement.
 
    "NASDAQ" means the Nasdaq National Market.
 
                                      135
<PAGE>
    "NET ASSET VALUE" with respect to each Partnership means (i) the sum of  (a)
the  Appraised Value  and (b)  the book  values of  the non-real  estate assets,
except for amortizable  assets, of the  Partnership as of  March 31, 1996,  less
(ii)  the sum of (x) the Partnership's liabilities as of March 31, 1996, (y) the
estimated cost  remaining  to be  incurred  as of  March  31, 1996  to  complete
in-progress  buildouts and unit conversions (the value of which were included in
the Appraised Value) and (z) the estimated  costs of the Offers and the  Mergers
that  would be borne  by the Partnership pursuant  to the Acquisition Agreement,
assuming the applicable Merger is consummated.
 
    "NONQUALIFYING INCOME" means income from  ancillary services which does  not
qualify under gross income tests for a REIT.
 
    "NYSE" means the New York Stock Exchange, Inc.
 
    "OFFERS"  means  the  IDS1  Offer,  the  IDS2  Offer  and  the  IDS3  Offer,
collectively.
 
    "PARTICIPATING  PARTNERSHIP"  means  each   Partnership  as  to  which   the
conditions to closing have been satisfied or waived.
 
    "PARTNERSHIP  AGREEMENT"  means  the  applicable  Partnership's  Amended and
Restated Agreement of Limited Partnership.
 
    "PARTNERSHIPS" means IDS1, IDS2 and IDS3, collectively.
 
    "PS" means Public Storage, Inc.
 
    "REGISTRATION STATEMENT" means the Registration Statement on Form S-4  filed
by  the Company with the Commission under the Securities Act with respect to the
shares to be issued upon consummation of the Mergers.
 
    "REIT" means a real estate investment trust.
 
    "REIT TAXABLE  INCOME" means  taxable income  of the  REIT computed  without
regard  to the dividends  paid deduction and  the Company's net  capital gain as
defined in Code Section 857(b)(2).
 
    "SECURITIES ACT" means the Securities Act of 1933, as amended.
 
    "SGPI" means Shurgard General Partner, Inc.
 
    "SHARE PRICE"  means the  average of  the per  share closing  prices of  the
Common  Stock on the NYSE  during the 20 consecutive  trading days ending on the
fifth trading day prior to the Vote Date.
 
    "SHARE PRICE RANGE" means the price  range between the lower limit  ($22.25)
and the upper limit ($27.75) of the Share Price.
 
    "SHARED  EXPENSES" means those expenses,  excluding the Individual Expenses,
that will be shared by the Company and the Partnerships.
 
    "SHARES" means the  shares of Common  Stock issuable by  the Company in  the
Mergers.
 
    "SJP  II" means Shurgard  Joint Partners II,  a joint venture  in which IDS1
holds a 70% interest and the Company holds a 30% interest.
 
    "SPECIAL COMMITTEE"  means a  special committee  of the  Company's board  of
directors consisting of two independent directors, Donald W. Lusk and Wendell J.
Smith.
 
    "SPECIAL  MEETINGS" means the meeting of Unitholders to be held  on        ,
            , 1996, at 10:00 a.m., local time, at 1201 Third Avenue, Suite 2200,
Seattle, Washington.
 
    "SRA" means Shurgard Realty Advisors, Inc.
 
    "SSCI" means Shurgard Storage Centers, Inc., a Delaware corporation.
 
    "STANGER" means Robert A. Stanger & Co., Inc., the financial advisor to each
of the Partnerships.
 
                                      136
<PAGE>
    "STANGER FAIRNESS  OPINION" means  the written  opinion dated  July 1,  1996
rendered by Stanger as to the fairness to Unitholders, from a financial point of
view, of the Merger Consideration.
 
    "TENDERED UNITS" means the Units of a Partnership that were purchased by the
Company in the applicable Offer.
 
    "UBTI"  means unrelated business  taxable income as  defined in Code Section
512.
 
    "UNITHOLDERS"  means,   collectively,  the   IDS1  Unitholders,   the   IDS2
Unitholders and the IDS3 Unitholders.
 
    "UNITHOLDERS'   PREFERENCE"  means   a  cumulative   amount  of  Partnership
distributions equal to their collective capital contributions plus a  cumulative
noncompounded  return  of  9% per  annum  on capital  contributions  received by
Unitholders of a Partnership.
 
    "UNITS" means units of limited partnership interest in the Partnerships.
 
    "VOTE DATE" means  the date the  General Partner of  a Partnership  actually
calls for the vote to approve the applicable Merger.
 
    "WULPA" means the Washington Uniform Limited Partnership Act.
 
                                      137
<PAGE>
                         INDEX TO FINANCIAL STATEMENTS
 
<TABLE>
<S>                                                                                    <C>
IDS/SHURGARD INCOME GROWTH PARTNERS L.P.
    Independent Auditors' Report.....................................................        F-2
    Consolidated Balance Sheets......................................................        F-3
    Consolidated Statements of Earnings..............................................        F-4
    Consolidated Statements of Partners' Equity (Deficit)............................        F-5
    Consoldiated Statements of Cash Flows............................................        F-6
    Notes to Consolidated Financial Statements.......................................        F-7
IDS/SHURGARD INCOME GROWTH PARTNERS L.P. II
    Independent Auditors' Report.....................................................        F-9
    Balance Sheets...................................................................       F-10
    Statements of Earnings...........................................................       F-11
    Statements of Partners' Equity (Deficit).........................................       F-12
    Statements of Cash Flows.........................................................       F-13
    Notes to Financial Statements....................................................       F-14
IDS/SHURGARD INCOME GROWTH PARTNERS L.P. III
    Independent Auditors' Report.....................................................       F-17
    Balance Sheets...................................................................       F-18
    Statements of Earnings...........................................................       F-19
    Statements of Partners' Equity (Deficit).........................................       F-20
    Statements of Cash Flows.........................................................       F-21
    Notes to Financial Statements....................................................       F-22
</TABLE>
 
                                      F-1
<PAGE>
                    IDS/SHURGARD INCOME GROWTH PARTNERS L.P.
                          INDEPENDENT AUDITORS' REPORT
 
General Partner and Limited Partners
IDS/Shurgard Income Growth Partners L.P.
Seattle, Washington
 
    We have audited the accompanying consolidated balance sheets of IDS/Shurgard
Income Growth Partners L.P. and subsidiary as of December 31, 1995 and 1994, and
the related consolidated statements of earnings, partners' equity (deficit), and
cash  flows for each of  the three years in the  period ended December 31, 1995.
These  financial  statements  are   the  responsibility  of  the   Partnership's
management.  Our  responsibility is  to express  an  opinion on  these financial
statements based on our audits.
 
    We conducted  our  audits in  accordance  with generally  accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence  supporting
the  amounts and disclosures in the financial statements. An audit also includes
assessing the  accounting  principles used  and  significant estimates  made  by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
    In our opinion,  such consolidated financial  statements present fairly,  in
all  material  respects, the  financial position  of IDS/Shurgard  Income Growth
Partners L.P. and subsidiary as of December  31, 1995 and 1994, and the  results
of  their operations  and their cash  flows for each  of the three  years in the
period ended December 31, 1995 in conformity with generally accepted  accounting
principles.
 
Deloitte & Touche LLP
Seattle, Washington
March 1, 1996
 
                                      F-2
<PAGE>
                    IDS/SHURGARD INCOME GROWTH PARTNERS L.P.
                          CONSOLIDATED BALANCE SHEETS
 
<TABLE>
<CAPTION>
                                                                                            DECEMBER 31,
                                                                                   ------------------------------
                                                                                        1995            1994
                                                                   MARCH 31, 1996  --------------  --------------
                                                                   --------------
                                                                    (UNAUDITED)
<S>                                                                <C>             <C>             <C>
ASSETS:
  Cash and cash equivalents......................................  $      702,060  $      668,672  $    1,877,311
  Storage centers, net...........................................      28,500,759      28,760,097      29,770,641
  Other assets...................................................         386,226         294,954         280,497
  Amortizable assets, less accumulated amortization of
   $1,155,366, $1,154,322 and $1,150,148.........................          13,913          14,957          19,131
                                                                   --------------  --------------  --------------
      Total Assets...............................................  $   29,602,958  $   29,738,680  $   31,947,580
                                                                   --------------  --------------  --------------
                                                                   --------------  --------------  --------------
 
LIABILITIES AND PARTNERS' EQUITY (DEFICIT):
  Liabilities:
    Accounts payable.............................................          36,644         105,669          59,496
    Other accrued expenses.......................................         115,680          44,953          40,790
    Due to affiliates............................................          39,694          39,082          40,208
    Unearned rent and tenant deposits............................         168,288         174,935         172,231
    Note payable.................................................              --              --       1,451,399
                                                                   --------------  --------------  --------------
      Total Liabilities..........................................         360,306         364,639       1,764,124
 
  Minority interest in joint partnership.........................       2,472,065       2,481,862       2,795,612
 
  Partners' equity (deficit):
    Limited partners.............................................      27,070,728      27,186,240      27,657,121
    General partner..............................................        (300,141)       (294,061)       (269,277)
                                                                   --------------  --------------  --------------
      Total Partners' Equity.....................................      26,770,587      26,892,179      27,387,844
                                                                   --------------  --------------  --------------
      Total Liabilities and Partners' Equity.....................  $   29,602,958  $   29,738,680  $   31,947,580
                                                                   --------------  --------------  --------------
                                                                   --------------  --------------  --------------
</TABLE>
 
See notes to consolidated financial statements.
 
                                      F-3
<PAGE>
                    IDS/SHURGARD INCOME GROWTH PARTNERS L.P.
                      CONSOLIDATED STATEMENTS OF EARNINGS
 
<TABLE>
<CAPTION>
                                             THREE MONTHS ENDED
                                                 MARCH 31,                      YEAR ENDED DECEMBER 31,
                                        ----------------------------  -------------------------------------------
                                            1996           1995           1995           1994           1993
                                        -------------  -------------  -------------  -------------  -------------
                                                (UNAUDITED)
<S>                                     <C>            <C>            <C>            <C>            <C>
REVENUE:
  Rental..............................  $   1,622,101  $   1,540,861  $   6,465,170  $   5,995,824  $   5,462,738
  Interest income.....................         10,257         22,022        107,234         60,204         28,570
                                        -------------  -------------  -------------  -------------  -------------
    Total Revenue.....................      1,632,358      1,562,883      6,572,404      6,056,028      5,491,308
 
EXPENSES:
  Operating...........................        394,413        379,324      1,493,285      1,383,594      1,325,571
  Property management fees............         97,345         92,396        387,904        359,655        327,766
  Depreciation and amortization.......        260,382        285,866      1,113,748      1,126,049      1,119,109
  Real estate taxes...................        126,550        119,936        465,662        490,913        502,219
  Interest............................                        33,091        130,022         96,731         94,915
  Administrative......................         54,421         62,597        215,529        179,596        172,236
                                        -------------  -------------  -------------  -------------  -------------
    Total Expenses....................        933,111        973,210      3,806,150      3,636,538      3,541,816
 
Minority interest in joint partnership
 earnings.............................        (65,203)       (54,828)      (263,750)      (195,781)      (128,767)
                                        -------------  -------------  -------------  -------------  -------------
 
EARNINGS..............................  $     634,044  $     534,845  $   2,502,504  $   2,223,709  $   1,820,725
                                        -------------  -------------  -------------  -------------  -------------
                                        -------------  -------------  -------------  -------------  -------------
 
EARNINGS PER UNIT OF LIMITED
 PARTNERSHIP INTEREST.................  $        4.06  $        3.43  $       16.04  $       14.25  $       11.67
                                        -------------  -------------  -------------  -------------  -------------
                                        -------------  -------------  -------------  -------------  -------------
 
DISTRIBUTIONS PER UNIT OF LIMITED
 PARTNERSHIP INTEREST.................  $        4.84  $        4.69  $       19.22  $       17.03  $       15.16
                                        -------------  -------------  -------------  -------------  -------------
                                        -------------  -------------  -------------  -------------  -------------
</TABLE>
 
See notes to consolidated financial statements.
 
                                      F-4
<PAGE>
                    IDS/SHURGARD INCOME GROWTH PARTNERS L.P.
             CONSOLIDATED STATEMENTS OF PARTNERS' EQUITY (DEFICIT)
 
<TABLE>
<CAPTION>
                                                                     LIMITED
                                                                    PARTNERS      GENERAL PARTNER      TOTAL
                                                                 ---------------  ---------------  --------------
<S>                                                              <C>              <C>              <C>
Balance, January 1, 1993.......................................   $  28,585,167    $    (220,433)  $   28,364,734
Distributions..................................................      (2,246,190)        (118,219)      (2,364,409)
Earnings.......................................................       1,729,689           91,036        1,820,725
                                                                 ---------------  ---------------  --------------
 
Balance, December 31, 1993.....................................      28,068,666         (247,616)      27,821,050
Distributions..................................................      (2,524,069)        (132,846)      (2,656,915)
Earnings.......................................................       2,112,524          111,185        2,223,709
                                                                 ---------------  ---------------  --------------
 
Balance, December 31, 1994.....................................      27,657,121         (269,277)      27,387,844
Distributions..................................................      (2,848,260)        (149,909)      (2,998,169)
Earnings.......................................................       2,377,379          125,125        2,502,504
                                                                 ---------------  ---------------  --------------
 
Balance, December 31, 1995.....................................      27,186,240         (294,061)      26,892,179
Distributions (unaudited)......................................        (717,854)         (37,782)        (755,636)
Earnings (unaudited)...........................................         602,342           31,702          634,044
                                                                 ---------------  ---------------  --------------
Balance, March 31, 1996 (unaudited)............................   $  27,070,728    $    (300,141)  $   26,770,587
                                                                 ---------------  ---------------  --------------
                                                                 ---------------  ---------------  --------------
</TABLE>
 
See notes to consolidated financial statements.
 
                                      F-5
<PAGE>
                    IDS/SHURGARD INCOME GROWTH PARTNERS L.P.
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
 
<TABLE>
<CAPTION>
                                                   THREE MONTHS ENDED MARCH
                                                              31,                        YEAR ENDED DECEMBER 31,
                                                  ---------------------------  -------------------------------------------
                                                      1996          1995           1995           1994           1993
                                                  ------------  -------------  -------------  -------------  -------------
                                                          (UNAUDITED)
<S>                                               <C>           <C>            <C>            <C>            <C>
OPERATING ACTIVITIES:
  Earnings......................................  $    634,044  $     534,845  $   2,502,504  $   2,223,709  $   1,820,725
    Adjustments to reconcile earnings to net
     cash provided by operating activities:
    Minority interest in joint partnership
     earnings...................................        65,203         54,828        263,750        195,781        128,767
    Depreciation and amortization...............       260,382        285,866      1,113,748      1,126,049      1,119,109
    Changes in operating accounts:
      Other assets..............................       (91,272)        15,856        (14,457)       (62,984)        85,209
      Accounts payable..........................       (69,025)       (41,310)        46,173         14,142         (3,626)
      Other accrued expenses....................        70,727         55,502          4,163         (5,805)        10,837
      Due to affiliates.........................           612            725         (1,126)        12,689         (4,786)
  Unearned rent and tenant deposits.............        (6,647)         9,314          2,704          5,395         13,947
                                                  ------------  -------------  -------------  -------------  -------------
Net cash provided by operating activities.......       864,024        915,626      3,917,459      3,508,976      3,170,182
                                                  ------------  -------------  -------------  -------------  -------------
INVESTING ACTIVITIES:
  Proceeds from grant of easements..............                                                                     7,599
  Improvements to storage centers...............            --             --        (99,030)      (136,846)      (118,994)
                                                  ------------  -------------  -------------  -------------  -------------
    Net cash used in investing activities.......            --             --        (99,030)      (136,846)      (111,395)
                                                  ------------  -------------  -------------  -------------  -------------
FINANCING ACTIVITIES:
  Payments on note payable......................                       (6,085)    (1,451,399)       (44,587)       (41,096)
  Distributions to partners.....................      (755,636)      (731,261)    (2,998,169)    (2,656,915)    (2,364,409)
  Distributions to minority partners in joint
   partnership..................................       (75,000)      (160,500)      (577,500)       (75,000)      (225,000)
                                                  ------------  -------------  -------------  -------------  -------------
    Net cash used in financing activities.......      (830,636)      (897,846)    (5,027,068)    (2,776,502)    (2,630,505)
                                                  ------------  -------------  -------------  -------------  -------------
Increase (decrease) in cash and cash
 equivalents....................................        33,388         17,780     (1,208,639)       595,628        428,282
Cash and cash equivalents at beginning of
 year...........................................       668,672      1,877,311      1,877,311      1,281,683        853,401
                                                  ------------  -------------  -------------  -------------  -------------
Cash and cash equivalents at end of year........  $    702,060  $   1,895,091  $     668,672  $   1,877,311  $   1,281,683
                                                  ------------  -------------  -------------  -------------  -------------
                                                  ------------  -------------  -------------  -------------  -------------
SUPPLEMENTAL DISCLOSURES OF CASH FLOW
 INFORMATION:
  Cash paid during year for interest............  $         --  $      33,091  $     130,022  $      96,731  $      94,915
                                                  ------------  -------------  -------------  -------------  -------------
                                                  ------------  -------------  -------------  -------------  -------------
</TABLE>
 
See notes to consolidated financial statements.
 
                                      F-6
<PAGE>
                    IDS/SHURGARD INCOME GROWTH PARTNERS L.P.
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
NOTE A -- SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
    GENERAL:   IDS/Shurgard Income Growth  Partners L.P. (the "Partnership") was
organized under the laws of  the State of Washington  on September 29, 1987,  to
serve  as a vehicle for investments in and ownership of a professionally managed
real estate  portfolio  consisting  of self  storage  properties  which  provide
month-to-month  leases  for  business  and personal  use.  The  Partnership will
terminate December 31, 2030, unless terminated  at an earlier date. The  general
partner is Shurgard Associates L.P., a Washington limited partnership.
 
    As of March 31, 1996, there were approximately 5,750 limited partners in the
Partnership.  There  were  approximately 148,202  units  of  limited partnership
interest outstanding at a contribution of $250 per unit.
 
    CONSOLIDATED FINANCIAL STATEMENTS:   In 1988,  the Partnership and  Shurgard
Income  Properties -- Fund 18 ("Shurgard 18"), an affiliated partnership, formed
a joint venture,  Shurgard Joint Partners  II ("SJP II"),  which purchased  four
self   storage  facilities   located  in  Detroit,   Michigan.  The  Partnership
contributed 70%  of  the funds  needed  for the  organization  of SJP  II,  with
Shurgard 18 contributing the remaining 30%.
 
    On March 1, 1994, Shurgard 18 was merged into Shurgard Storage Centers, Inc.
("SSCI")   as  part  of  the  consolidation  of  17  Shurgard-sponsored  limited
partnerships. As a result of the merger, SSCI succeeded to all of Shurgard  18's
interest  in SJP II, and  assumed its obligations as  a partner. The Partnership
consented to SSCI's admission as a successor partner in SJP II. SSCI granted  to
the  Partnership the right  to sell its  interest in SJP  II at any  time in the
future to either  SSCI or,  at SSCI's request,  to any  wholly owned  subsidiary
thereof, at a price mutually agreeable to the parties or, if no mutual agreement
could be reached, at a price determined through an appraisal process.
 
    The  Partnership and  SSCI receive  cash distributions  from SJP  II and are
allocated all income, gain,  loss and credit in  proportion to their  respective
capital contributions to SJP II.
 
    The   consolidated  financial   statements  include  the   accounts  of  the
Partnership and SJP II. All material interpartnership transactions and  balances
have  been eliminated. The minority partner's interests in the joint partnership
are shown separately on the accompanying consolidated financial statements.
 
    The  preparation  of  financial  statements  in  conformity  with  generally
accepted  accounting  principles  requires  management  to  make  estimates  and
assumptions that affect the reported amounts of revenue and expenses during  the
reporting period. Actual results can differ from those estimates.
 
    The  consolidated interim financial  statements included in  this report are
unaudited. In the opinion  of the Partnership, all  adjustments necessary for  a
fair  presentation  of  such  financial  statements  have  been  included.  Such
adjustments consisted only of  normal recurring items.  Interim results are  not
necessarily indicative of results for a full year.
 
    CASH EQUIVALENTS:  Cash equivalents consist of money market instruments with
original maturities of 90 days or less.
 
    STORAGE  CENTERS:  Storage centers, including land, buildings and equipment,
are recorded at cost. Depreciation on  buildings and equipment is recorded on  a
straight-line  basis over their estimated useful lives which range from three to
thirty years.
 
    AMORTIZABLE  ASSETS:    Amortizable  assets,  which  consist  primarily   of
noncompete  covenants and loan  costs, are amortized  over their expected useful
lives of two to five years.
 
    RENTAL REVENUE:    Rental revenue  is  recognized as  earned  under  accrual
accounting principles.
 
                                      F-7
<PAGE>
                    IDS/SHURGARD INCOME GROWTH PARTNERS L.P.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
    TAXES  ON INCOME:   The consolidated  financial statements do  not reflect a
provision for federal income taxes because such taxes, including a proportionate
interest in any SJP II taxes, are the responsibility of the individual partners.
 
    LITIGATION:  The Partnership has a  policy of accruing for probable  losses,
which,  if any, could be material to the future financial position or results of
operations. As of March 31, 1996, there are currently no known probable  losses;
therefore, no such accruals have been made.
 
    EARNINGS  PER UNIT  OF LIMITED PARTNERSHIP  INTEREST:  Earnings  per unit of
limited partnership  interest is  based  on earnings  allocated to  the  limited
partners  divided by the number of  limited partnership units outstanding during
the year (148,202 units for each of the three years ended December 31, 1995  and
the three months ended March 31, 1995 and 1996).
 
    DISTRIBUTIONS  PER UNIT OF LIMITED  PARTNERSHIP INTEREST:  Distributions per
unit of limited partnership interest is based on the total amount distributed to
limited partners divided by the number of limited partnership units  outstanding
during  the year (148,202 units  for each of the  three years ended December 31,
1995 and the three months ended March 31, 1995 and 1996).
 
    VALUATION OF LONG LIVED ASSETS:   The Partnership, using its best  estimates
based on reasonable and supportable assumptions and projections, reviews storage
centers   and  other  assets  for  impairment  whenever  events  or  changes  in
circumstances have indicated that the carrying  amounts of its assets might  not
be recoverable. Impaired assets are reported at the lower of cost or fair value.
At March 31, 1996, no assets had been written down.
 
    RECLASSIFICATION:  Certain items in the 1993 and 1994 consolidated financial
statements have been reclassified to conform with the current year presentation.
 
NOTE B -- STORAGE CENTERS
 
    Storage centers consist of the following:
 
<TABLE>
<CAPTION>
                                                                        DECEMBER 31,
                                                               ------------------------------
                                                                    1995            1994
                                               MARCH 31, 1996  --------------  --------------
                                               --------------
                                                (UNAUDITED)
<S>                                            <C>             <C>             <C>
Land.........................................  $    6,429,852  $    6,429,852  $    6,429,852
Buildings....................................      28,463,189      28,463,189      28,390,139
Equipment....................................       1,200,005       1,200,005       1,174,025
                                               --------------  --------------  --------------
                                                   36,093,046      36,093,046      35,994,016
Less accumulated depreciation................      (7,592,287)     (7,332,949)     (6,223,375)
                                               --------------  --------------  --------------
                                               $   28,500,759  $   28,760,097  $   29,770,641
                                               --------------  --------------  --------------
                                               --------------  --------------  --------------
</TABLE>
 
NOTE C -- NOTE PAYABLE
 
    At  December 31, 1994, the  Partnership held a seven-year  note payable to a
commercial bank bearing interest  at 7.75% per annum.  On December 6, 1995,  the
Partnership repaid the balance of this note.
 
NOTE D -- TRANSACTIONS WITH AFFILIATES
 
    In  connection  with the  management  of both  the  storage centers  and the
Partnership, the Partnership has paid  or accrued a monthly property  management
fee  equal to 6% of  the properties' gross revenue to  SSCI, an affiliate of the
general partner.  On March  24, 1995,  Shurgard Incorporated  merged with  SSCI.
Prior to the merger date such fees were paid to Shurgard Incorporated.
 
                                      F-8
<PAGE>
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. II
                          INDEPENDENT AUDITORS' REPORT
 
General Partner and Limited Partners
IDS/Shurgard Income Growth Partners L.P. II
Seattle, Washington
 
    We  have  audited the  accompanying  balance sheets  of  IDS/Shurgard Income
Growth Partners  L.P. II  as of  December 31,  1995 and  1994, and  the  related
statements  of earnings, partners' equity (deficit),  and cash flows for each of
the three  years  in  the  period  ended  December  31,  1995.  These  financial
statements   are  the  responsibility  of   the  Partnership's  management.  Our
responsibility is to express an opinion  on these financial statements based  on
our audits.
 
    We  conducted  our audits  in  accordance with  generally  accepted auditing
standards. Those standards require that we plan and perform the audit to  obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also  includes
assessing  the  accounting principles  used  and significant  estimates  made by
management, as well as evaluating the overall financial statement  presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
    In  our opinion, such  financial statements present  fairly, in all material
respects, the financial position of the Partnership as of December 31, 1995  and
1994, and the results of its operations and its cash flows for each of the three
years  in  the  period ended  December  31,  1995 in  conformity  with generally
accepted accounting principles.
 
Deloitte & Touche LLP
 
Seattle, Washington
March 1, 1996
 
                                      F-9
<PAGE>
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. II
 
                                 BALANCE SHEETS
 
<TABLE>
<CAPTION>
                                                                                            DECEMBER 31,
                                                                                   ------------------------------
                                                                                        1995            1994
                                                                   MARCH 31, 1996  --------------  --------------
                                                                   --------------
                                                                    (UNAUDITED)
<S>                                                                <C>             <C>             <C>
ASSETS:
  Cash and cash equivalents......................................   $    367,914   $      455,167  $      384,867
  Storage centers, net...........................................     24,748,826       24,965,503      25,126,512
  Other assets...................................................        193,561          155,712         174,768
  Amortizable assets, less accumulated amortization of $368,442,
   $350,718 and $279,821.........................................         91,253          108,977         179,874
                                                                   --------------  --------------  --------------
      Total Assets...............................................   $ 25,401,554   $   25,685,359  $   25,866,021
                                                                   --------------  --------------  --------------
                                                                   --------------  --------------  --------------
 
LIABILITIES AND PARTNERS' EQUITY (DEFICIT):
  Liabilities:
    Accounts payable and other accrued expenses..................   $    270,026   $      256,049  $      169,033
    Construction payable.........................................                                         173,572
    Unearned rent and tenant deposits............................                         132,881         118,132
    Line of credit...............................................        470,000          470,000
    Notes payable................................................      2,849,503        2,867,661       2,938,331
                                                                   --------------  --------------  --------------
      Total Liabilities..........................................      3,589,529        3,726,591       3,399,068
  Partners' equity (deficit):
    Limited partners.............................................     22,001,034       22,140,440      22,623,217
    General partner..............................................       (189,009)        (181,672)       (156,264)
                                                                   --------------  --------------  --------------
      Total Partners' Equity.....................................     21,812,025       21,958,768  $   22,466,953
                                                                   --------------  --------------  --------------
      Total Liabilities and Partners' Equity.....................   $ 25,401,554   $   25,685,359  $   25,866,021
                                                                   --------------  --------------  --------------
                                                                   --------------  --------------  --------------
</TABLE>
 
See notes to financial statements.
 
                                      F-10
<PAGE>
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. II
 
                             STATEMENTS OF EARNINGS
 
<TABLE>
<CAPTION>
                                        THREE MONTHS ENDED MARCH 31,
                                                                                YEAR ENDED DECEMBER 31,
                                        ----------------------------  -------------------------------------------
                                            1996           1995           1995           1994           1993
                                        -------------  -------------  -------------  -------------  -------------
                                                (UNAUDITED)
<S>                                     <C>            <C>            <C>            <C>            <C>
REVENUE:
  Rental..............................  $   1,092,790  $   1,013,765  $   4,308,603  $   4,037,720  $   3,617,849
  Interest Income.....................          5,234          2,041         11,044         19,765          3,549
                                        -------------  -------------  -------------  -------------  -------------
    Total Revenue.....................      1,098,024      1,015,806      4,319,647      4,057,485      3,621,398
EXPENSES:
  Operating...........................        249,832        230,097        943,532        875,926        786,459
  Property management fees............         65,568         60,791        258,253        242,259        217,121
  Depreciation........................        216,677        209,318        848,364        832,554        814,883
  Real estate taxes...................         89,667         92,368        324,450        327,337        337,741
  Interest............................         69,817         65,103        254,026        237,962        166,036
  Amortization........................         17,724         17,725         70,897         70,835         78,580
  Administrative......................         43,236         45,305        159,326        130,467        126,103
                                        -------------  -------------  -------------  -------------  -------------
    Total Expenses....................        752,521        720,707      2,858,848      2,717,340      2,526,923
EARNINGS..............................  $     345,503  $     295,099  $   1,460,799  $   1,340,145  $   1,094,475
                                        -------------  -------------  -------------  -------------  -------------
                                        -------------  -------------  -------------  -------------  -------------
EARNINGS PER UNIT OF LIMITED
 PARTNERSHIP INTEREST.................  $        2.85  $        2.44  $       12.06  $       11.06  $        9.03
                                        -------------  -------------  -------------  -------------  -------------
                                        -------------  -------------  -------------  -------------  -------------
DISTRIBUTIONS PER UNIT OF LIMITED
 PARTNERSHIP INTEREST.................  $        4.06  $        4.06  $       16.25  $       15.78  $       15.62
                                        -------------  -------------  -------------  -------------  -------------
                                        -------------  -------------  -------------  -------------  -------------
</TABLE>
 
See notes to financial statements.
 
                                      F-11
<PAGE>
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. II
 
                    STATEMENTS OF PARTNERS' EQUITY (DEFICIT)
 
<TABLE>
<CAPTION>
                                                                        LIMITED        GENERAL
                                                                        PARTNERS       PARTNER         TOTAL
                                                                     --------------  ------------  --------------
<S>                                                                  <C>             <C>           <C>
Balance, January 1, 1993...........................................  $   23,925,497  $    (87,721) $   23,837,776
Distributions......................................................      (1,798,591)      (94,664)     (1,893,255)
Earnings...........................................................       1,039,751        54,724       1,094,475
                                                                     --------------  ------------  --------------
 
Balance, December 31, 1993.........................................      23,166,657      (127,661)     23,038,996
Distributions......................................................      (1,816,578)      (95,610)     (1,912,188)
Earnings...........................................................       1,273,138        67,007       1,340,145
                                                                     --------------  ------------  --------------
 
Balance, December 31, 1994.........................................      22,623,217      (156,264)     22,466,953
Distributions......................................................      (1,870,536)      (98,448)     (1,968,984)
Earnings...........................................................       1,387,759        73,040       1,460,799
                                                                     --------------  ------------  --------------
 
Balance, December 31, 1995.........................................      22,140,440      (181,672)     21,958,768
Distributions (unaudited)..........................................        (467,634)      (24,612)       (492,246)
Earnings (unaudited)...............................................         328,228        17,275         345,503
                                                                     --------------  ------------  --------------
 
Balance, March 31, 1996 (unaudited)................................  $   22,001,034  $   (189,009) $   21,812,025
                                                                     --------------  ------------  --------------
                                                                     --------------  ------------  --------------
</TABLE>
 
See notes to financial statements.
 
                                      F-12
<PAGE>
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. II
 
                            STATEMENTS OF CASH FLOWS
 
<TABLE>
<CAPTION>
                                                 THREE MONTHS ENDED MARCH
                                                           31,                         YEAR ENDED DECEMBER 31,
                                                --------------------------  ----------------------------------------------
                                                    1996          1995           1995            1994            1993
                                                ------------  ------------  --------------  --------------  --------------
                                                       (UNAUDITED)
<S>                                             <C>           <C>           <C>             <C>             <C>
OPERATING ACTIVITIES:
  Earnings....................................  $    345,503  $    295,099  $    1,460,799  $    1,340,145  $    1,094,475
  Adjustments to reconcile earnings to net
   cash provided by operating activities:
    Depreciation and amortization.............       234,401       227,043         919,261         903,389         893,463
    Changes in operating accounts:
      Other assets............................       (37,849)       17,474          19,056         (41,692)        (22,696)
      Accounts payable and other accrued
       expenses...............................      (119,524)       12,185          87,016          (1,861)       (212,815)
      Unearned rent and tenant deposits.......           620         6,696          14,749          11,414          (1,796)
                                                ------------  ------------  --------------  --------------  --------------
  Net cash provided by operating activities...       423,151       558,497       2,500,881       2,211,395       1,750,631
INVESTING ACTIVITIES:
  Construction of and improvements to storage
   centers....................................       --           (497,809)       (860,927)       (430,410)       (809,619)
                                                ------------  ------------  --------------  --------------  --------------
FINANCING ACTIVITIES:
  Proceeds from (payments on) line of
   credit.....................................                     185,000         470,000      (1,250,000)      1,250,000
  Payment of loan costs.......................                                                     (38,021)         (2,671)
  Payment on notes payable....................       (18,158)      (16,318)        (70,670)        (66,982)        (38,555)
  Proceeds from notes payable.................                                                   1,250,000
  Distributions to partners...................      (492,246)     (492,246)     (1,968,984)     (1,912,188)     (1,893,255)
                                                ------------  ------------  --------------  --------------  --------------
  Net cash used in financing activities.......      (510,404)     (323,564)     (1,569,654)     (2,017,191)       (684,481)
                                                ------------  ------------  --------------  --------------  --------------
(Decrease) increase in cash and cash
 equivalents..................................       (87,253)     (262,876)         70,300        (236,206)        256,531
Cash and cash equivalents at beginning of
 year.........................................       455,167       384,867         384,867         621,073         364,542
                                                ------------  ------------  --------------  --------------  --------------
Cash and cash equivalents at end of year......  $    367,914  $    121,991  $      455,167  $      384,867  $      621,073
                                                ------------  ------------  --------------  --------------  --------------
                                                ------------  ------------  --------------  --------------  --------------
SUPPLEMENTAL DISCLOSURE OF CASH FLOW
 INFORMATION:
  Cash paid during year for interest..........  $     69,817  $     65,103  $      254,026  $      237,962  $      166,036
                                                ------------  ------------  --------------  --------------  --------------
                                                ------------  ------------  --------------  --------------  --------------
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING
 ACTIVITIES:
  Liabilities incurred in connection with the
   improvement and construction of storage
   centers....................................  $    --       $    --       $     --        $      173,572  $     --
                                                ------------  ------------  --------------  --------------  --------------
                                                ------------  ------------  --------------  --------------  --------------
</TABLE>
 
See notes to financial statements.
 
                                      F-13
<PAGE>
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. II
                         NOTES TO FINANCIAL STATEMENTS
 
NOTE A -- SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
    GENERAL:   IDS/Shurgard Income  Growth Partners L.P.  II (the "Partnership")
was organized under the laws of the State of Washington on November 15, 1988, to
serve as a vehicle for investments in and ownership of a professionally  managed
real  estate  portfolio  consisting  of self  storage  properties  which provide
month-to-month leases  for  business  and personal  use.  The  Partnership  will
terminate  December 31, 2030, unless terminated  at an earlier date. The general
partner is Shurgard Associates L.P. II, a Washington limited partnership.
 
    As of March 31, 1996, there were approximately 4,200 limited partners in the
Partnership. There  were  approximately  115,100 units  of  limited  partnership
interest outstanding at a contribution of $250 per unit.
 
    The  preparation  of  financial  statements  in  conformity  with  generally
accepted  accounting  principles  requires  management  to  make  estimates  and
assumptions  that affect the reported amounts of revenue and expenses during the
reporting period. Actual results can differ from those estimates.
 
    The interim financial statements included  in this report are unaudited.  In
the opinion of the Company, all adjustments necessary for a fair presentation of
such financial statements have been included. Such adjustments consisted only of
normal  recurring  items.  Interim  results are  not  necessarily  indicative of
results for a full year.
 
    CASH EQUIVALENTS:  Cash equivalents consist of money market instruments with
original maturities of 90 days or less.
 
    STORAGE CENTERS:  Storage centers, including land, buildings and  equipment,
are  recorded at cost. Depreciation on buildings  and equipment is recorded on a
straight-line basis over their estimated useful lives which range from three  to
thirty years.
 
    AMORTIZABLE  ASSETS:    Amortizable  assets, consisting  of  loan  costs and
non-compete covenants, are amortized over  their expected useful lives of  three
to eight years.
 
    RENTAL  REVENUE:    Rental revenue  is  recognized as  earned  under accrual
accounting principles.
 
    TAXES ON INCOME:   The financial statements do  not reflect a provision  for
Federal income taxes because such taxes are the responsibility of the individual
partners.
 
    LITIGATION:   The Partnership has a  policy of accruing for probable losses,
which if any, could be material to  the future financial position or results  of
operations.  As of March 31, 1996, there are currently no known probable losses,
therefore, no such accruals have been made.
 
    EARNINGS PER UNIT  OF LIMITED PARTNERSHIP  INTEREST:  Earnings  per unit  of
limited  partnership  interest is  based on  earnings  allocated to  the limited
partners divided by the number  of limited partnership units outstanding  during
the  year (115,110 units for each of the three years ended December 31, 1995 and
three months ended March 31, 1996 and 1995).
 
    DISTRIBUTIONS PER UNIT OF LIMITED  PARTNERSHIP INTEREST:  Distributions  per
unit of limited partnership interest is based on the total amount distributed to
limited  partners divided by the number of limited partnership units outstanding
during the year (115,110 units  for each of the  three years ended December  31,
1995 and three months ended March 31, 1996 and 1995).
 
    VALUATION  OF LONG LIVED ASSETS:   The Partnership, using its best estimates
based on reasonable and supportable assumptions and projections, reviews storage
centers  and  other  assets  for  impairment  whenever  events  or  changes   in
circumstances  have indicated that the carrying  amounts of its assets might not
be recoverable. Impaired assets are reported at the lower of cost or fair value.
At March 31, 1996, no assets had been written down.
 
                                      F-14
<PAGE>
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. II
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
NOTE B -- STORAGE CENTERS
 
    Storage centers consist of the following:
 
<TABLE>
<CAPTION>
                                                                        DECEMBER 31,
                                                               ------------------------------
                                                                    1995            1994
                                               MARCH 31, 1996  --------------  --------------
                                               --------------
                                                (UNAUDITED)
<S>                                            <C>             <C>             <C>
Land.........................................  $    6,014,514  $    6,014,514  $    5,848,181
Building.....................................      22,762,245      22,762,245      22,381,990
Equipment....................................         872,980         872,980         732,213
                                               --------------  --------------  --------------
                                                   29,649,739      29,649,739      28,962,384
Less accumulated depreciation................      (4,900,913)     (4,684,236)     (3,835,872)
                                               --------------  --------------  --------------
                                               $   24,748,826  $   24,965,503  $   25,126,512
                                               --------------  --------------  --------------
                                               --------------  --------------  --------------
</TABLE>
 
    Construction in progress was $625,437 at  December 31, 1994 and is  included
in buildings.
 
NOTE C -- TRANSACTIONS WITH AFFILIATES
 
    In  connection  with the  management  of both  the  storage centers  and the
Partnership,  the  Partnership   has  paid  or   accrued  management   expenses,
reimbursements  and  a  monthly  property  management fee  equal  to  6%  of the
properties gross revenue to Shurgard Storage Centers, Inc., an affiliate of  the
general  partner. On March  24, 1995 Shurgard  Incorporated merged with Shurgard
Storage Centers, Inc. Prior to the merger  date such fees were paid to  Shurgard
Incorporated.
 
<TABLE>
<CAPTION>
                                                               YEAR ENDED DECEMBER 31,
                                                        -------------------------------------
                                                           1995         1994         1993
                                            MARCH 31,   -----------  -----------  -----------
                                              1996
                                           -----------
                                           (UNAUDITED)
<S>                                        <C>          <C>          <C>          <C>
Partnership management expenses and
 reimbursement at cost...................   $  13,300   $    54,700  $    64,800  $    83,700
Property management fees.................      65,568       258,253      242,259      217,121
</TABLE>
 
NOTE D -- NOTES PAYABLE
 
<TABLE>
<CAPTION>
                                                                          DECEMBER 31,
                                                                  ----------------------------
                                                                      1995           1994
                                                     MARCH 31,    -------------  -------------
                                                       1996
                                                   -------------
                                                    (UNAUDITED)
<S>                                                <C>            <C>            <C>
Note payable to a commercial bank. Secured by
 real estate and payable in monthly installments
 of $15,056, including principal and interest at
 8%, due October 1999. The note reprices in
 September 1997 and can be fixed for various
 periods at the Partnership's option.............  $   1,656,457  $   1,668,337  $   1,713,603
Note payable to a commercial bank. Secured by
 real estate and payable in monthly installments
 of $10,837, including principal and interest at
 8.25%, due March 2001. The note reprices in
 September 1996 and can be fixed for various
 periods at the Partnership's option.............      1,193,046      1,199,324      1,224,728
                                                   -------------  -------------  -------------
                                                   $   2,849,503  $   2,867,661  $   2,938,331
                                                   -------------  -------------  -------------
                                                   -------------  -------------  -------------
</TABLE>
 
                                      F-15
<PAGE>
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. II
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
    Based on the borrowing rates currently available to the Partnership for bank
loans  with similar terms  and average maturities,  the fair value  of the fixed
rate long-term debt which matures October,  1999 is estimated to be  $1,765,000.
The  note maturing March 2001 reprices  to market every six months, accordingly,
the recorded value approximates fair value.
 
    The approximate maturities of principal on these notes payable over the next
five years are as follows:
 
<TABLE>
<S>                                    <C>
1996.................................               $    78,207
1997.................................                    84,856
1998.................................                    92,071
1999.................................                    99,899
2000.................................                   108,395
thereafter...........................                 2,404,233
                                                    -----------
                                                    $ 2,867,661
                                                    -----------
                                                    -----------
</TABLE>
 
    On May 1, 1995, the Partnership  obtained an $850,000 non-revolving line  of
credit  with interest rate  of prime plus  one half percent  (9% at December 31,
1995), maturing May 1, 1997. During  the year, the Partnership drew $470,000  on
the line of credit in order to fund the Chesapeake expansion.
 
NOTE E -- LEASE
 
    The  Partnership leases  retail space at  the Kennydale storage  center to a
single tenant under a noncancellable  operating lease which expires October  31,
2003.  The  lease is  renewable at  current  market rates  at that  time. Future
minimum lease receipts are as follows:
 
<TABLE>
<S>                                    <C>
1996.................................               $   131,818
1997.................................                   136,948
1998.................................                   137,938
1999.................................                   126,084
2000.................................                   126,084
2001 to 2003.........................                   378,252
                                                    -----------
                                                    $ 1,037,124
                                                    -----------
                                                    -----------
</TABLE>
 
                                      F-16
<PAGE>
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. III
 
                          INDEPENDENT AUDITORS' REPORT
 
General Partner and Limited Partners
IDS/Shurgard Income Growth Partners L.P. III
Seattle, Washington
 
We  have audited the  accompanying balance sheets  of IDS/Shurgard Income Growth
Partners L.P. III as of December 31,  1995 and 1994, and the related  statements
of  earnings, partners equity  (deficit), and cash  flows for each  of the three
years in the period ended December 31, 1995. These financial statements are  the
responsibility of the Partnership's management. Our responsibility is to express
an opinion on these financial statements based on our audits.
 
    We  conducted  our audits  in  accordance with  generally  accepted auditing
standards. Those standards require that we plan and perform the audit to  obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also  includes
assessing  the  accounting principles  used  and significant  estimates  made by
management, as well as evaluating the overall financial statement  presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
    In  our opinion, such  financial statements present  fairly, in all material
respects, the financial position of the Partnership as of December 31, 1995  and
1994  and the results of its operations and its cash flows for each of the three
years in  the  period ended  December  31,  1995 in  conformity  with  generally
accepted accounting principles.
 
Deloitte & Touche LLP
Seattle, Washington
March 1, 1996
 
                                      F-17
<PAGE>
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. III
                                 BALANCE SHEETS
 
<TABLE>
<CAPTION>
                                                                                            DECEMBER 31,
                                                                                   ------------------------------
                                                                                        1995            1994
                                                                   MARCH 31, 1996  --------------  --------------
                                                                   --------------
                                                                    (UNAUDITED)
<S>                                                                <C>             <C>             <C>
ASSETS:
  Cash and cash equivalents......................................  $      395,166  $      673,130  $      602,285
  Storage centers, net...........................................      33,903,059      34,146,500      35,121,146
  Other assets...................................................         358,552         250,621         258,242
  Amortizable assets, less accumulated amortization of
   $1,190,330, $1,131,762 and $749,074...........................         305,533         364,101         746,789
  Land held for resale...........................................         201,835         201,835         201,835
                                                                   --------------  --------------  --------------
    Total Assets.................................................  $   35,164,145  $   35,636,187  $   36,930,297
                                                                   --------------  --------------  --------------
                                                                   --------------  --------------  --------------
LIABILITIES AND PARTNERS' EQUITY (DEFICIT):
  Liabilities:
  Accounts payable and other accrued expenses....................  $      422,533  $      476,306         428,900
  Notes payable..................................................      10,384,296      10,745,854      11,619,725
                                                                   --------------  --------------  --------------
    Total Liabilities............................................      10,806,829      11,222,160      12,048,625
  Partners' equity (deficit):
    Limited partners.............................................      24,464,765      24,518,638      24,962,899
    General partner..............................................        (107,449)       (104,611)        (81,227)
                                                                   --------------  --------------  --------------
      Total Partners' Equity.....................................      24,357,316      24,414,027      24,881,672
                                                                   --------------  --------------  --------------
      Total Liabilities and Partners' Equity.....................  $   35,164,145  $   35,636,187  $   36,930,297
                                                                   --------------  --------------  --------------
                                                                   --------------  --------------  --------------
</TABLE>
 
See notes to financial statements.
 
                                      F-18
<PAGE>
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. III
 
                             STATEMENTS OF EARNINGS
 
<TABLE>
<CAPTION>
                                             THREE MONTHS ENDED
                                                  MARCH 31                      YEAR ENDED DECEMBER 31,
                                        ----------------------------  -------------------------------------------
                                            1996           1995           1995           1994           1993
                                        -------------  -------------  -------------  -------------  -------------
                                                (UNAUDITED)
<S>                                     <C>            <C>            <C>            <C>            <C>
REVENUE:
  Rental..............................  $   1,806,553  $   1,720,373  $   7,224,762  $   6,608,932  $   4,109,845
  Interest and other income...........          9,343          6,928         36,378         56,948        230,099
                                        -------------  -------------  -------------  -------------  -------------
    Total Revenue.....................      1,815,896      1,727,301      7,261,140      6,665,880      4,339,944
EXPENSES:
  Operating...........................        460,398        440,234      1,799,970      1,625,933      1,183,446
  Property management fees............        108,093        103,223        433,316        393,684        246,650
  Depreciation........................        282,034        280,622      1,122,039      1,052,532        661,921
  Real estate taxes...................        134,821        126,333        506,460        504,422        361,790
  Interest............................        194,032        214,039        960,964        820,083        122,691
  Amortization........................         58,568        118,821        382,688        465,348        211,138
  Administrative......................         46,430         57,760        170,424        148,544        125,635
                                        -------------  -------------  -------------  -------------  -------------
    Total Expenses....................      1,284,376      1,341,032      5,375,861      5,010,546      2,913,271
EARNINGS..............................  $     531,520  $     386,269  $   1,885,279  $   1,655,334  $   1,426,673
                                        -------------  -------------  -------------  -------------  -------------
                                        -------------  -------------  -------------  -------------  -------------
EARNINGS PER UNIT OF LIMITED
 PARTNERSHIP INTEREST.................  $        4.24  $        3.08  $       15.02  $       13.19  $       11.37
                                        -------------  -------------  -------------  -------------  -------------
                                        -------------  -------------  -------------  -------------  -------------
DISTRIBUTIONS PER UNIT OF LIMITED
 PARTNERSHIP INTEREST.................  $        4.69  $        4.69  $       18.75  $       17.81  $       15.31
                                        -------------  -------------  -------------  -------------  -------------
                                        -------------  -------------  -------------  -------------  -------------
</TABLE>
 
See notes to financial statements.
 
                                      F-19
<PAGE>
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. III
 
                    STATEMENTS OF PARTNERS' EQUITY (DEFICIT)
 
<TABLE>
<CAPTION>
                                                                     LIMITED
                                                                    PARTNERS      GENERAL PARTNER      TOTAL
                                                                 ---------------  ---------------  --------------
<S>                                                              <C>              <C>              <C>
Balance, January 1, 1993.......................................   $  25,983,981    $     (27,488)  $   25,956,493
Distributions..................................................      (1,825,475)         (96,077)      (1,921,552)
Earnings.......................................................       1,355,338           71,335        1,426,673
                                                                 ---------------  ---------------  --------------
 
Balance, December 31, 1993.....................................      25,513,844          (52,230)      25,461,614
Distributions..................................................      (2,123,512)        (111,764)      (2,235,276)
Earnings.......................................................       1,572,567           82,767        1,655,334
                                                                 ---------------  ---------------  --------------
 
Balance, December 31, 1994.....................................      24,962,899          (81,227)      24,881,672
Distributions..................................................      (2,235,276)        (117,648)      (2,352,924)
Earnings.......................................................       1,791,015           94,264        1,885,279
                                                                 ---------------  ---------------  --------------
 
Balance, December 31, 1995.....................................      24,518,638         (104,611)      24,414,027
Distributions (unaudited)......................................        (558,819)         (29,412)        (588,231)
Earnings (unaudited)...........................................         504,944           26,576          531,520
                                                                 ---------------  ---------------  --------------
 
Balance, March 31, 1996 (unaudited)............................   $  24,464,763    $    (107,447)  $   24,357,316
                                                                 ---------------  ---------------  --------------
                                                                 ---------------  ---------------  --------------
</TABLE>
 
See notes to financial statements.
 
                                      F-20
<PAGE>
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. III
 
                            STATEMENTS OF CASH FLOWS
 
<TABLE>
<CAPTION>
                                                 THREE MONTHS ENDED MARCH
                                                            31,                        YEAR ENDED DECEMBER 31,
                                                ---------------------------  -------------------------------------------
                                                    1996          1995           1995           1994           1993
                                                ------------  -------------  -------------  -------------  -------------
                                                        (UNAUDITED)
<S>                                             <C>           <C>            <C>            <C>            <C>
OPERATING ACTIVITIES:
  Earnings....................................  $    531,520  $     386,269  $   1,885,279  $   1,655,334  $   1,426,673
    Adjustments to reconcile earnings to net
     cash provided by operating activities:
      Depreciation and amortization...........       340,602        399,443      1,504,727      1,517,880        873,059
      Changes in operating accounts:
        Other assets..........................      (107,931)        (4,414)         7,621        (50,866)       (41,318)
        Accounts payable and other accrued
         expenses.............................       (53,773)       (42,628)        47,406        (14,540)       129,143
                                                ------------  -------------  -------------  -------------  -------------
    Net cash provided by operating
     activities...............................       710,418        738,670      3,445,033      3,107,808      2,387,557
                                                ------------  -------------  -------------  -------------  -------------
 
INVESTING ACTIVITIES:
  Purchase of and improvements to storage
   centers....................................       (38,593)        (7,659)      (147,393)      (588,910)   (15,476,979)
  Consideration for amortizable assets........                                                   (286,950)      (670,804)
                                                ------------  -------------  -------------  -------------  -------------
    Net cash used in investing activities.....       (38,593)        (7,659)      (147,393)      (875,860)   (16,147,783)
                                                ------------  -------------  -------------  -------------  -------------
 
FINANCING ACTIVITIES:
  Proceeds from notes payable.................       600,000                                    9,500,000      8,865,000
  Payments on notes payable...................      (961,558)      (429,333)      (873,871)    (9,375,275)      (865,000)
  Payments of loan costs......................                                                   (242,226)      (127,846)
  Distributions to partners...................      (588,231)      (588,231)    (2,352,924)    (2,235,276)    (1,921,552)
                                                ------------  -------------  -------------  -------------  -------------
    Net cash (used in) provided by financing
     activities...............................      (949,789)    (1,017,564)    (3,226,795)    (2,352,777)     5,950,602
                                                ------------  -------------  -------------  -------------  -------------
 
  (Decrease) increase in cash and cash
   equivalents................................      (277,964)      (286,553)        70,845       (120,829)    (7,809,624)
  Cash and cash equivalents at beginning of
   year.......................................       673,130        602,285        602,285        723,114      8,532,738
                                                ------------  -------------  -------------  -------------  -------------
  Cash and cash equivalents at end of year....  $    395,166  $     315,732  $     673,130  $     602,285  $     723,114
                                                ------------  -------------  -------------  -------------  -------------
                                                ------------  -------------  -------------  -------------  -------------
 
SUPPLEMENTAL DISCLOSURE OF CASH FLOW
 INFORMATION:
  Cash paid during year for interest..........  $    194,032  $     214,039  $     940,442  $     776,498  $     113,247
                                                ------------  -------------  -------------  -------------  -------------
                                                ------------  -------------  -------------  -------------  -------------
 
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING
 ACTIVITIES:
  Liabilities incurred in connection with the
   purchase of storage centers................  $    --       $    --        $    --        $     674,000  $   2,821,000
                                                ------------  -------------  -------------  -------------  -------------
                                                ------------  -------------  -------------  -------------  -------------
</TABLE>
 
See notes to financial statements.
 
                                      F-21
<PAGE>
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. III
 
                         NOTES TO FINANCIAL STATEMENTS
 
NOTE A -- SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
    GENERAL:   IDS/Shurgard Income Growth  Partners L.P. III (the "Partnership")
was organized under the laws of the State of Washington on November 15, 1988, to
serve as a vehicle for investments in and ownership of a professionally  managed
real  estate  portfolio  consisting  of self  storage  properties  which provide
month-to-month leases  for  business  and personal  use.  The  Partnership  will
terminate  December 31, 2030, unless terminated  at an earlier date. The general
partner is Shurgard Associates L.P. III, a Washington limited partnership.
 
    As of March 31, 1996, there were approximately 4,100 limited partners in the
Partnership. There  were  approximately  119,215 units  of  limited  partnership
interest outstanding at a contribution of $250 per unit.
 
    The  preparation  of  financial  statements  in  conformity  with  generally
accepted  accounting  principles  requires  management  to  make  estimates  and
assumptions  that affect the reported amounts of revenue and expenses during the
reporting period. Actual results can differ from those estimates.
 
    The interim financial statements included  in this report are unaudited.  In
the   opinion  of  the  Partnership,  all   adjustments  necessary  for  a  fair
presentation of such financial statements  have been included. Such  adjustments
consisted  only of normal  recurring items. Interim  results are not necessarily
indicative of results for a full year.
 
    CASH EQUIVALENTS:  Cash equivalents consist of money market instruments with
original maturities of 90 days or less.
 
    STORAGE CENTERS:  Storage centers,  including land, buildings and  equipment
are  recorded at cost. Depreciation on buildings  and equipment is recorded on a
straight-line basis over their estimated useful lives which range from three  to
thirty years.
 
    AMORTIZABLE ASSETS:  Amortizable assets, consisting primarily of non-compete
covenants  and loan costs, are amortized over their expected useful lives of two
to eight years.
 
    RENTAL REVENUE:    Rental revenue  is  recognized as  earned  under  accrual
accounting principles.
 
    TAXES  ON INCOME:  The  financial statements do not  reflect a provision for
Federal income taxes because such taxes are the responsibility of the individual
partners.
 
    LITIGATION:  The Partnership has a  policy of accruing for probable  losses,
which  if any, could be material to  the future financial position or results of
operations. As of March 31, 1996, there are currently no known probable  losses,
therefore, no such accruals have been made.
 
    EARNINGS  PER UNIT  OF LIMITED PARTNERSHIP  INTEREST:  Earnings  per unit of
limited partnership  interest is  based  on earnings  allocated to  the  limited
partners  divided by the number of  limited partnership units outstanding during
the year (119,215 units for each of the three years ended December 31, 1995  and
the three months ended March 31, 1996 and 1995).
 
    DISTRIBUTIONS  PER UNIT OF LIMITED  PARTNERSHIP INTEREST:  Distributions per
unit of limited partnership interest is based on the total amount distributed to
limited partners divided by the number of limited partnership units  outstanding
during  the year (119,215 units  for each of the  three years ended December 31,
1995 and the three months ended March 31, 1996 and 1995).
 
    VALUATION OF LONG LIVED ASSETS:   The Partnership, using its best  estimates
based on reasonable and supportable assumptions and projections, reviews storage
centers   and  other  assets  for  impairment  whenever  events  or  changes  in
circumstances have indicated that the carrying  amounts of its assets might  not
be recoverable. Impaired assets are reported at the lower of cost or fair value.
Assets  to be disposed  of are reported at  the lower of  cost or net realizable
value. At March 31, 1996, no assets had been written down.
 
                                      F-22
<PAGE>
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. III
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
NOTE B -- STORAGE CENTERS
    Storage centers consist of the following:
 
<TABLE>
<CAPTION>
                                                                                  DECEMBER 31,
                                                                         ------------------------------
                                                                              1995            1994
                                                         MARCH 31, 1996  --------------  --------------
                                                         --------------
                                                          (UNAUDITED)
<S>                                                      <C>             <C>             <C>
Land...................................................  $    7,503,081  $    7,503,081  $    7,515,406
Buildings..............................................      29,277,560      29,238,967      29,110,884
Equipment..............................................         699,802         699,802         668,167
                                                         --------------  --------------  --------------
                                                             37,480,443      37,441,850      37,294,457
Less accumulated depreciation..........................      (3,577,384)     (3,295,350)     (2,173,311)
                                                         --------------  --------------  --------------
                                                         $   33,903,059  $   34,146,500  $   35,121,146
                                                         --------------  --------------  --------------
                                                         --------------  --------------  --------------
</TABLE>
 
NOTE C -- NOTES PAYABLE
 
<TABLE>
<CAPTION>
                                                                                  DECEMBER 31,
                                                                         ------------------------------
                                                                              1995            1994
                                                         MARCH 31, 1996  --------------  --------------
                                                         --------------
                                                          (UNAUDITED)
<S>                                                      <C>             <C>             <C>
Notes payable to sellers...............................  $      674,000  $    1,583,653  $    2,264,000
Note payable to bank...................................       9,710,296       9,162,201       9,355,725
                                                         --------------  --------------  --------------
                                                         $   10,384,296  $   10,745,854  $   11,619,725
                                                         --------------  --------------  --------------
                                                         --------------  --------------  --------------
</TABLE>
 
    On March 31,  1994, the Partnership  consolidated outstanding notes  payable
totaling  $8 million and borrowed  an additional $1.5 million.  The new terms of
this note provide the Partnership the option to borrow an additional $3 million.
This note is secured by real estate  and bears interest at 8%. The note  matures
April 1, 2001 and requires monthly payments of principal and interest based on a
twenty-year  amortization.  The  note  reprices  to  market  every  six  months,
accordingly, the recorded value approximates fair value.
 
    Notes to sellers,  which mature December  31, 1996, are  secured by  certain
storage  centers of the Partnership. The  recorded value of these seller's notes
approximates fair value. Annual payments of principal are due 90 days after year
end under  conditions provided  in the  note agreement  based on  each  center's
performance.  Quarterly  interest  is payable  to  the extent  any  center's net
operating income, as defined, exceeds 10% of the Partnership's investment in the
related center. In  1994 and 1995,  the Partnership made  principal payments  of
$651,000  and $680,347 respectively,  on these notes. On  February 29, 1996, the
Partnership borrowed  $600,000 on  its bank  note to  partially fund  the  final
payment  of $909,653 on the  seller's note that originated  with the purchase of
the Castro Valley storage center and  to replenish cash reserves. Maturities  of
notes payable include this final payment made February 29, 1996.
 
    Maturities of notes payable at December 31, 1995, are as follows:
 
<TABLE>
<S>                                                             <C>
1996..........................................................  $ 1,798,135
1997..........................................................      233,730
1998..........................................................      254,705
1999..........................................................      277,563
2000..........................................................      302,472
Thereafter....................................................    7,879,249
                                                                -----------
                                                                $10,745,854
                                                                -----------
                                                                -----------
</TABLE>
 
                                      F-23
<PAGE>
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. III
 
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
 
NOTE D -- ACQUISITION
    During  the years ended December 31, 1993 and 1994, the Partnership acquired
existing storage  centers from  unaffiliated  parties. These  acquisitions  were
funded  through  a combination  of bank  notes, seller  notes and  cash. Certain
information about these acquisitions is as follows:
 
<TABLE>
<CAPTION>
                                              PROPERTY            ACQUISITION
             FACILITY                         LOCATION               PRICE              DATE
- -----------------------------------  ---------------------------  -----------  -----------------------
<S>                                  <C>                          <C>          <C>
Castro Valley (1)                    Castro Valley, CA              5,000,000  August, 1993
Newark (1)                           Newark, CA                     3,340,000  August, 1993
San Leandro (1)                      San Leandro, CA                2,671,000  August, 1993
Tracy (1)                            Tracy, CA                      2,250,000  August, 1993
Sacramento (1)                       Sacramento, CA                 2,834,000  February, 1994
San Lorenzo (1)                      San Lorenzo, CA                2,905,000  February, 1994
Castro Valley Office Bldg. (2)       Castro Valley, CA                500,000  May, 1994
</TABLE>
 
- ------------------------
(1) These purchases were funded with cash,  an $8 million bank note, and  $3.495
    million in seller notes.
 
(2) This purchase was funded with cash.
 
    The  transactions  were  accounted  for as  purchases,  and  the  results of
operations for each  of the  storage centers from  their respective  acquisition
date  have  been  included  in the  financial  statements.  The  general partner
estimates that if  these properties  had been acquired  on January  1, 1994  and
1993,  the pro forma combined results of operations for the year would have been
as follows:
 
<TABLE>
<CAPTION>
                                                                                1994           1993
                                                                            -------------  -------------
                                                                                    (UNAUDITED)
<S>                                                                         <C>            <C>
Total revenue.............................................................  $   6,773,234  $   6,237,005
Earnings..................................................................  $   1,613,010  $   1,331,884
Earnings per unit of limited partnership interest.........................  $       12.85  $       10.61
</TABLE>
 
    These pro  forma  operating results  include  the Partnership's  results  of
operations,  less increased depreciation and amortization on storage centers and
other assets, respectively, and increased interest expense on the bank loans.
 
    The pro forma information does not  purport to be indicative of the  results
that  actually  would have  been obtained  if the  combined operations  had been
conducted for the full  year and is  not intended to be  a projection of  future
results.
 
NOTE E -- TRANSACTIONS WITH AFFILIATES
    In  connection with the management of  the centers, the Partnership has paid
or accrued a monthly property management fee equal to 6% of the properties gross
revenue to Shurgard Storage Centers, Inc., an affiliate of the general  partner.
On  March 24, 1995  Shurgard Incorporated merged  with Shurgard Storage Centers,
Inc. Prior to the merger date such fees were paid to Shurgard Incorporated.
 
                                      F-24
<PAGE>
                                                                      APPENDIX A
 
                             ACQUISITION AGREEMENT
 
                                  BY AND AMONG
 
                   IDS/SHURGARD INCOME GROWTH PARTNERS L.P.,
 
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. II
 
                                      AND
 
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. III
 
                         (TOGETHER, THE "PARTNERSHIPS")
 
                                      AND
 
                         SHURGARD STORAGE CENTERS, INC.
 
                                (THE "COMPANY")
 
                                  JULY 1, 1996
 
                                      A-i
<PAGE>
                                    CONTENTS
 
<TABLE>
<C>        <S>                                                                            <C>
ARTICLE I.  THE OFFERS..................................................................          1
      1.1  The Offers...................................................................          1
      1.2  Conditions to Commencement of the Offers.....................................          1
      1.3  Actions and Agreements of the Partnerships and the Company...................          2
      1.4  Offer Documents..............................................................          2
      1.5  General Partner Recommendation...............................................          3
 
                                                                                                  3
ARTICLE II.  THE MERGER.................................................................
      2.1  The Merger...................................................................          3
      2.2  Effective Time of the Merger.................................................          3
      2.3  Certificate of Incorporation of the Surviving Corporation....................          3
      2.4  Bylaws of the Surviving Corporation..........................................          4
      2.5  Board of Directors and Officers of the Surviving Corporation.................          4
 
                                                                                                  4
ARTICLE III.  CONVERSION OF PARTNERSHIP INTERESTS IN THE MERGER.......................
      3.1  Merger Consideration.........................................................          4
      3.2  Certain Definitions..........................................................          4
      3.3  Distribution of Merger Consideration.........................................          5
      3.4  No Fractional Shares.........................................................          5
      3.5  Dissenting Units.............................................................          5
      3.6  Issuance of Certificates for REIT Shares.....................................          6
      3.7  Transfer of Units............................................................          6
 
                                                                                                  6
ARTICLE IV.  REPRESENTATIONS AND WARRANTIES.............................................
      4.1  Representations and Warranties of the Partnerships...........................          6
      4.2  Representations and Warranties of the Company................................          9
 
                                                                                                 11
ARTICLE V.  COVENANTS AND AGREEMENTS....................................................
      5.1  Ordinary Course; No Acquisitions or Dispositions.............................         11
      5.2  Distributions................................................................         11
      5.3  Amendment of Governing Documents.............................................         12
      5.4  Exclusivity..................................................................         12
      5.5  Other Actions................................................................         12
      5.6  Advise of Changes............................................................         13
      5.7  Meetings of Limited Partner..................................................         13
      5.8  Registration and Listing of REIT Shares......................................         13
      5.9  S-4 Registration Statement and Proxy Statement/Prospectus....................         13
      5.10 Consents and Approvals.......................................................         13
      5.11 Limitation on Number of REIT Shares Issued...................................         14
 
                                                                                                 14
ARTICLE VI.  CLOSING....................................................................
      6.1  Closing Date.................................................................         14
      6.2  Additional Closings..........................................................         14
      6.3  Further Acts.................................................................         14
 
                                                                                                 14
ARTICLE VII.  CONDITIONS................................................................
      7.1  Conditions to Each Party's Obligations.......................................         14
      7.2  Conditions to the Obligations of the Company.................................         15
      7.3  Conditions to the Obligations of the Partnerships............................         15
 
                                                                                                 16
ARTICLE VIII.  TERMINATION AND WAIVER...................................................
      8.1  Termination..................................................................         16
      8.2  Effect of Termination........................................................         17
      8.3  Fees and Expenses............................................................         17
      8.4  Extension; Waiver............................................................         19
</TABLE>
 
                                      A-ii
<PAGE>
<TABLE>
<C>        <S>                                                                            <C>
      8.5  No Survival of Representations and Warranties................................         19
 
                                                                                                 19
ARTICLE IX.  MISCELLANEOUS..............................................................
      9.1  Assignment of Contract.......................................................         19
      9.2  Risk of Loss.................................................................         19
      9.3  Entire Agreement; Modifications..............................................         19
      9.4  Notices......................................................................         19
      9.5  Interpretation...............................................................         20
      9.6  Captions.....................................................................         20
      9.7  Multiple Counterparts........................................................         20
      9.8  Binding Effect...............................................................         20
      9.9  Attorneys' Fees..............................................................         20
      9.10 No Waiver; Severability......................................................         21
      9.11 No Joint and Several Liability...............................................         21
      9.12 Applicable Law...............................................................         21
</TABLE>
 
Exhibit A  General Partner Undertaking
Exhibit B  Opinion of Counsel to the Partnerships
Exhibit C  Opinion of Special Counsel to the Company
 
                                     A-iii
<PAGE>
                                    GLOSSARY
 
    The  following is a list of the defined terms used in this Agreement and the
Sections in which such terms are defined:
 
<TABLE>
<CAPTION>
                     TERM                                          SECTION
<S>                                             <C>
Additional Consideration                        Section 3.2(c)
Agreement                                       Preamble
Alternative Transaction                         Section 8.3(c)
Appraised Value                                 Section 3.2(a)
Appraiser                                       Section 3.2(a)
Assets                                          Recital A
Balance Sheet                                   Section 4.1(i)
Closing                                         Section 6.1
Closing Date                                    Section 6.1
Closing Net Asset Value                         Section 5.2
Commission                                      Section 1.4
Company                                         Preamble
Company SEC Documents                           Section 4.2(f)
Constituent Entities                            Section 2.1
DGCL                                            Section 2.1
Dissenting Units                                Section 3.5
Dissolution                                     Section 3.1(a)
Effective Time                                  Section 2.2
Exchange Act                                    Section 1.1
Exchange Agent                                  Section 3.3
Exchange Fund                                   Section 3.3
General Partner                                 Recital B
General Partner Recommendation                  Section 1.5
General Partner Undertaking                     Recital C
Governmental Regulations                        Section 4.1(l)
GP Interest                                     Section 3.1(b)
Hazardous Materials                             Section 4.1(l)
IDS1                                            Preamble
IDS2                                            Preamble
IDS3                                            Preamble
Individual Transaction Expenses                 Section 8.3(a)
LP Units                                        Section 1.1
Merger                                          Section 2.1
Merger Consideration                            Section 3.1
Net Asset Value                                 Section 3.2(a)
NYSE                                            Section 3.2(b)
Offer                                           Section 1.1
Offer Documents                                 Section 1.4
Offer Price                                     Section 1.1
Participating Partnership                       Section 2.1
Partnership                                     Preamble
Partnership Agreement                           Section 4.1(a)
Partnership Financial Statements                Section 4.1(e)
Partnership SEC Documents                       Section 4.1(d)
Property                                        Recital A
Proxy Statement/Prospectus                      Section 5.9
REIT Share Price                                Section 3.2(b)
REIT Share Price Range                          Section 3.2(b)
</TABLE>
 
                                      A-iv
<PAGE>
<TABLE>
<CAPTION>
                     TERM                                          SECTION
REIT Shares                                     Section 3.1(a)
<S>                                             <C>
S-4 Registration Statement                      Section 4.1(f)
Schedules                                       Section 1.4
Schedules 13E-3                                 Section 1.4
Schedules 14D-1                                 Section 1.4
Schedules 14D-9                                 Section 1.4
Securities Act                                  Section 4.1(d)
Shared Transaction Expenses                     Section 8.3(a)
Special Committee                               Section 1.2
Standstill                                      Section 1.3(d)
Surviving Corporation                           Section 2.1
Terminating Breach                              Section 8.1(f)
Third Party                                     Section 8.3(c)
WULPA                                           Section 2.1
</TABLE>
 
                                      A-v
<PAGE>
                             ACQUISITION AGREEMENT
 
    This ACQUISITION AGREEMENT (this "Agreement") is entered into as of July  1,
1996  by IDS/ Shurgard Income Growth Partners L.P. ("IDS1"), IDS/Shurgard Income
Growth Partners L.P. II  ("IDS2") and IDS/Shurgard  Income Growth Partners  L.P.
III   ("IDS3"),  each   a  Washington   limited  partnership   (individually,  a
"Partnership" and together, the  "Partnerships"), and Shurgard Storage  Centers,
Inc., a Delaware corporation (the "Company").
 
                                    RECITALS
 
    A.    The Partnerships  are the  owners  of certain  self storage  and other
properties (which  properties,  including  any buildings,  structures  or  other
improvements  situated thereon  are herein  referred to  as the  "Property") and
related personal  property and  other assets  (together with  the Property,  the
"Assets").
 
    B.    Shurgard Associates  L.P., Shurgard  Associates  L.P. II  and Shurgard
Associates L.P.  III  (each, a  "General  Partner" and  together,  the  "General
Partners")  and the Board of Directors of the  Company believe that it is in the
best interests  of the  Partnerships and  the Company,  respectively, and  their
respective  limited partners and stockholders to  enter into and consummate this
Agreement.
 
    C.  Concurrently with the execution of this Agreement, the General  Partners
and  the Company are  entering into a  General Partner Undertaking,  dated as of
July 1, 1996 (the "General Partner Undertaking"), in the form attached hereto as
Exhibit A.
 
                                   AGREEMENTS
 
    NOW, THEREFORE, in consideration of the mutual representations,  warranties,
covenants and agreements set forth herein, the parties hereto agree as follows:
 
ARTICLE I.  THE OFFERS
 
    1.1  THE OFFERS
 
    As  soon as  practicable after the  date hereof, the  Company shall commence
(within the meaning of Rule 14d-2(a) of the Securities Exchange Act of 1934,  as
amended  (the "Exchange Act")), a tender offer for up to 65,000 units of limited
partner interests (the "LP Units") of IDS1,  49,000 LP Units of IDS2 and  52,000
LP  Units of IDS3  (each, an "Offer" and  together the "Offers"),  at a net cash
price per LP Unit  equal to the  Net Asset Value (as  defined in Section  3.2(a)
hereof)  of the applicable Partnership that would be allocated to one LP Unit if
the Partnership's Net  Asset Value  were distributed  in a  dissolution of  such
Partnership  in accordance with its Partnership Agreement (as defined in Section
4.1(a) hereof). The parties hereto acknowledge  that the Net Asset Value per  LP
Unit  is equal  to $257,  $222 and  $308 for  IDS1, IDS2  and IDS3, respectively
(each, the "Offer Price" and together  the "Offer Prices"). The Company may  not
change  the form of consideration, reduce the  Offer Price or amend any material
term of an Offer in a manner adverse to the interests of the limited partners of
the applicable  Partnership without  the prior  written consent  of the  General
Partner  of  such Partnership.  The Company  agrees to  use its  reasonable best
efforts to consummate the Offers as soon as legally permissible and, subject  to
the terms and conditions of the Offers, to accept for payment and pay for all LP
Units  tendered pursuant to the Offers  promptly following the expiration of the
Offers.
 
    1.2  CONDITIONS TO COMMENCEMENT OF THE OFFERS
 
    The commencement of the Offers is conditioned upon:
 
    (a) the receipt by the  Special Committee of the  Board of Directors of  the
Company appointed to review the transactions contemplated by this Agreement (the
"Special  Committee") of an opinion  from Alex. Brown &  Sons Incorporated as to
the fairness  to the  Company, from  a financial  point of  view, of  the  Offer
Prices;
 
                                      A-1
<PAGE>
    (b)  the receipt by  each of the  Partnerships of an  opinion from Robert A.
Stanger &  Co.,  Inc., as  to  the fairness  to  the limited  partners  of  such
Partnership, from a financial point of view, of the applicable Offer Price; and
 
    (c)  the General Partners  shall have executed and  delivered to the Company
the General  Partner  Undertaking and  shall  have performed  their  obligations
thereunder  that are  capable of  being performed  prior to  commencement of the
Offers.
 
    1.3  ACTIONS AND AGREEMENTS OF THE PARTNERSHIPS AND THE COMPANY
 
    (a) The Partnerships hereby consent to the making of the Offers.
 
    (b) The Partnerships shall promptly cause  to be furnished to the Company  a
list  containing the  names and addresses  of all record  holders and beneficial
owners known to them of LP Units as of a recent date, and shall promptly furnish
the Company with such  additional information and such  other assistance as  the
Company or its agents may reasonably request in connection with the Offers.
 
    (c)  The Partnerships and the Company will take such actions as are required
under the  applicable  Partnership Agreement  to  effect the  admission  of  the
Company  as a limited  partner of the  Partnership with respect  to all LP Units
acquired by it pursuant to the applicable Offer in accordance with the terms  of
the Partnership Agreement.
 
    (d)  The  Company agrees  that if  it  is admitted  as a  substitute limited
partner in a Partnership and except as otherwise contemplated by this Agreement,
it will not,  directly or  indirectly, without the  prior written  consent of  a
majority  of the general partners of the General Partner of that Partnership (i)
acquire any additional LP Units of that Partnership, (ii) propose any merger  or
other  business  combination involving  that Partnership,  or (iii)  propose any
other transaction  pursuant to  which it  would control  or acquire  any of  the
assets   of  that  Partnership   (this  agreement  being   referred  to  as  the
"Standstill").
 
    1.4  OFFER DOCUMENTS
 
    On the date of commencement of the  Offers, (a) the Company shall file  with
the  Securities and Exchange  Commission (the "Commission")  with respect to the
Offers, (i) a Tender Offer Statement on  Schedule 14D-1 with respect to each  of
the  Partnerships  (together with  any  supplements or  amendments  thereto, the
"Schedules 14D-1") and (ii) jointly with  each of the Partnerships (if  required
by  the Exchange Act), a Transaction  Statement on Schedule 13E-3 (together with
any supplements  or amendments  thereto,  the "Schedules  13E-3") and  (b)  each
Partnership  shall  file  with  the  Commission  with  respect  to  the  Offer a
Solicitation/Recommendation Statement  on  Schedule  14D-9  (together  with  any
supplements  or amendments thereto, the  "Schedules 14D-9"; the Schedules 14D-1,
the Schedules 13E-3 and the Schedules 14D-9 are referred to collectively as  the
"Schedules")  and, jointly with  the Company (if required  by the Exchange Act),
shall file  with the  Commission the  applicable Schedule  13E-3. The  Schedules
14D-1  and the Schedules  13E-3 will contain  (including as an  exhibit) or will
incorporate by reference an offer to  purchase (or portions thereof) and a  form
of  the  related  letter  of transmittal  (which  documents,  together  with any
supplements or  amendments  thereto  and  any other  documents  filed  with  the
Commission  or disseminated to  holders of LP  Units by the  Company pursuant to
which  the  Offers  are  made,  are  referred  to  collectively  as  the  "Offer
Documents").
 
    The  Partnerships and the Company shall  cooperate with each other and shall
supply each other with any assistance that the other shall reasonably request in
preparing and  filing  the  Schedules  and  distributing  the  Offer  Documents,
including, without limitation, supplying each other with any and all information
that  is required to be  furnished in the Schedules.  The Company may include in
the Offer Documents any  information with respect to  the Partnerships that  the
Company  shall reasonably determine  is required under the  Exchange Act and the
rules promulgated thereunder to  be included in the  Offer Documents, with  such
qualifications   and   disclaimers   as  are   reasonably   acceptable   to  the
 
                                      A-2
<PAGE>
applicable Partnership. The Company represents and warrants to the Partnerships,
and  each  Partnership  represents  and  warrants  to  the  Company,  that   the
information  provided by it, and to be provided  by it for use in the Schedules,
shall not, on the date the Schedules  are filed with the Commission, and on  the
date  the Offer Documents  are first published,  sent or given  to holders of LP
Units, as the case may  be, contain any untrue statement  of a material fact  or
omit  to state any material  fact required to be  stated therein or necessary in
order to make the statements therein, in light of the circumstances under  which
they   were  made,  not  misleading.  The  Company  shall  promptly  notify  the
Partnerships of, and shall promptly correct, and the Partnerships shall promptly
notify the Company of, and shall  promptly correct, any information provided  by
it  for use in the Schedules that shall  have become untrue or misleading in any
material respect and shall take all steps necessary to cause the Schedules as so
corrected to be  filed with  the Commission and  disseminated to  holders of  LP
Units,  in each  case to  the extent  required by  applicable federal securities
laws.
 
    1.5  GENERAL PARTNER RECOMMENDATION
 
    The Offer  Documents, the  Schedules  14D-9 and  the Schedules  13E-3  shall
contain,  to the extent  applicable, at all  times from the  commencement of the
Offers through the consummation of the Offers the recommendation of the  General
Partner  set  forth  in Section  1.2  of  the General  Partner  Undertaking (the
"General Partner Recommendation"), unless the  General Partner has withdrawn  or
changed  such recommendation  in accordance with  the exercise  of its fiduciary
duties or as otherwise required by law.
 
ARTICLE II.  THE MERGER
 
    2.1  THE MERGER
 
    Upon the terms and subject to  the conditions hereof, at the Effective  Time
(as  defined in Section 2.2 hereof), each Partnership as to which the conditions
to closing set forth in Article VII hereof have been met (each such Partnership,
a "Participating Partnership") shall be merged (the "Merger") with and into  the
Company  in accordance  with the applicable  provisions of  the Delaware General
Corporation Law (the "DGCL") and the Washington Uniform Limited Partnership  Act
(the  "WULPA"). When the Merger has been effected the Participating Partnerships
and the  Company  (together,  the  "Constituent  Entities")  will  be  a  single
corporation;  the separate existence  of each of  the Participating Partnerships
will cease; the Company, as the corporation surviving the Merger (the "Surviving
Corporation"), will continue its corporate existence under the DGCL; all  Assets
and  every other interest of or belonging to or due to each of the Participating
Partnerships will be  deemed to be  transferred to and  vested in the  Surviving
Corporation  without further  act or  deed; the  title to  the Property,  or any
interest therein, vested in any of  the Constituent Entities will not revert  or
be  in any way impaired  by reason of the  Merger; and the Surviving Corporation
will  thenceforth  be  responsible  and  liable  for  all  the  liabilities  and
obligations of each of the Constituent Entities.
 
    2.2  EFFECTIVE TIME OF THE MERGER
 
    The  Merger will  become effective when  a properly  executed Certificate of
Merger is duly filed with the Secretary  of State of Delaware and the  Secretary
of  State of Washington, which filing will  be made as soon as practicable after
the closing of  the transactions  contemplated by this  Agreement in  accordance
with  Section 6.1 hereof. When used in this Agreement, the term "Effective Time"
means the date and time on which such Certificate is so filed.
 
    2.3  CERTIFICATE OF INCORPORATION OF THE SURVIVING CORPORATION
 
    At the Effective Time,  and without any  further action on  the part of  the
Constituent  Entities,  the Certificate  of  Incorporation of  the  Company will
continue in effect and will be the Certificate of Incorporation of the Surviving
Corporation and thereafter may  be amended in accordance  with its terms and  as
provided by law.
 
                                      A-3
<PAGE>
    2.4  BYLAWS OF THE SURVIVING CORPORATION
 
    At  the Effective Time,  and without any  further action on  the part of the
Constituent Entities, the Bylaws of the Company will continue in effect  without
amendment and will be the Bylaws of the Surviving Corporation and thereafter may
be  amended or repealed  in accordance with  their terms and  the Certificate of
Incorporation of the Surviving Corporation and as provided by law.
 
    2.5  BOARD OF DIRECTORS AND OFFICERS OF THE SURVIVING CORPORATION
 
    At the Effective Time, the persons serving as directors of the Company  will
be  the directors of the  Surviving Corporation, each of  such directors to hold
office, subject to the applicable provisions of the Certificate of Incorporation
and Bylaws of  the Surviving Corporation,  until the expiration  of the  current
term  for which they  are serving as  a director and  until their successors are
duly elected or appointed and qualified. The officers of the Company immediately
prior to the Effective  Time will be the  officers of the Surviving  Corporation
until their respective successors are duly elected or appointed and qualified.
 
ARTICLE III.  CONVERSION OF PARTNERSHIP INTERESTS IN THE MERGER
 
    3.1  MERGER CONSIDERATION
 
    At the Effective Time, and subject to Sections 3.4 and 3.5 hereof, by virtue
of  the Merger and without any further action by the limited partners or General
Partners of the Participating Partnerships,
 
    (a) each LP Unit (other than LP Units  owned by the Company) of each of  the
Participating  Partnerships will be converted into the right to receive (i) that
number of shares of  Class A Common  Stock of the Company,  par value $.001  per
share  (the "REIT Shares"), derived by dividing  the Net Asset Value (as defined
in Section 3.2(a) hereof) of the applicable Participating Partnership that would
be allocated  to  one  LP  Unit  if such  Partnership's  Net  Asset  Value  were
distributed  in  a  dissolution  of  such  Partnership  in  accordance  with its
Partnership Agreement, taking into account  all outstanding LP Units,  including
those  owned  by the  Company (a  "Dissolution"),  by the  REIT Share  Price (as
defined in Section 3.2(b) hereof) and (ii) if any is payable, the amount of  the
Additional  Consideration (as  defined in Section  3.2(c) hereof)  that would be
allocated to one LP Unit if  the Additional Consideration were distributed in  a
Dissolution;
 
    (b)  the  General  Partner  interest  (the "GP  Interest")  of  each  of the
Participating Partnerships will be converted into the right to receive (i)  that
number  of REIT Shares derived by dividing the Net Asset Value of the applicable
Participating Partnership that  would be allocated  to the GP  Interest if  such
Partnership's Net Asset Value was distributed in a Dissolution by the REIT Share
Price  and (ii) if  any is payable,  the amount of  the Additional Consideration
that would be allocated to the GP Interest if the Additional Consideration  were
distributed in a Dissolution; and
 
    (c) the LP Units owned by the Company shall be canceled.
 
(The  REIT Shares issuable  pursuant to the  Merger, together with  cash paid in
lieu of  fractional  REIT Shares  as  provided in  Section  3.4 hereof  and  any
Additional Consideration, if any, that is payable, are referred to herein as the
"Merger  Consideration.") If,  prior to the  Effective Time,  the Company should
split or combine the REIT  Shares, or pay a stock  dividend, the number of  REIT
Shares  issuable in  the Merger will  be appropriately adjusted  to reflect such
action.
 
    3.2  CERTAIN DEFINITIONS
 
    (a) As used herein,  "Net Asset Value"  means, with respect  to each of  the
Partnerships,  (i) the sum of  (A) the appraised fair  market values of the real
estate assets  of the  Partnership as  of December  31, 1995  set forth  in  the
Portfolio Appraisal Reports dated June 26, 1996 (the "Appraised Value") prepared
by  Robert  A. Stanger  &  Co., Inc.  (the  "Appraiser"), which  Appraised Value
reflected the value of in-progress unit  conversions and buildouts, and (B)  the
book values of the non-real estate assets, except for amortizable assets, of the
Partnership  as of March 31,  1996, less (ii) the  sum of (X) such Partnership's
liabilities as  of  March 31,  1996,  (Y) the  estimated  cost remaining  to  be
incurred
 
                                      A-4
<PAGE>
as of March 31, 1996 to complete in-progress unit conversions and buildouts, the
value  of which was included in the  Appraised Value and (Z) the estimated costs
of the Offer and the Merger that would be borne by the Partnership in accordance
with Article VIII hereof, assuming the Merger is consummated.
 
    (b) As used herein, "REIT  Share Price" means, with  respect to each of  the
Partnerships,  the average of the per share closing prices on the New York Stock
Exchange, Inc. (the  "NYSE") of REIT  Shares during the  20 consecutive  trading
days  ending on the fifth trading day prior to the day of the meeting of limited
partners of the  applicable Partnership  on which the  General Partner  actually
calls  for  the  vote  of  the  limited  partners  to  approve  of  the  Merger.
Notwithstanding the foregoing, in the event the REIT Share Price exceeds $27.75,
then for purposes of calculating the number of REIT Shares to be issued pursuant
to Section 3.1 hereof the REIT Share Price shall be deemed to equal $27.75; and,
in the event  the REIT Share  Price is less  than $22.25, then  for purposes  of
calculating  the number of REIT Shares to be issued pursuant to this Section 3.2
the REIT Share Price shall be deemed  to equal $22.25 (the range of prices  from
the upper to the lower limit on the REIT Share Price is referred to as the "REIT
Share  Price Range"). The parties hereto acknowledge  that in the event the REIT
Share Price exceeds $28.50, the Company may terminate this Agreement as provided
in Section 8.1(e)(iv) hereof, and in the event the REIT Share Price is less than
$21.50, the  Partnership may  terminate this  Agreement as  provided in  Section
8.1(h) hereof unless the Company agrees to pay the Additional Consideration.
 
    (c)  As used herein, "Additional Consideration"  means, with respect to each
of the Partnerships,  that amount of  cash equal to  the difference between  the
REIT  Share Price calculated  without regard to  the REIT Share  Price Range and
$21.50, multiplied by the number of REIT Shares issuable pursuant to the Merger.
 
    3.3  DISTRIBUTION OF MERGER CONSIDERATION
 
    Prior to  the Effective  Time, the  Company shall  deposit (or  cause to  be
deposited)  with Gemisys Corporation, as  exchange agent (the "Exchange Agent"),
for the  benefit  of  the General  Partners  and  the limited  partners  of  the
Participating  Partnerships for exchange in accordance  with this Article III, a
number of REIT Shares and that amount of cash as is sufficient to pay the Merger
Consideration (such REIT Shares  and cash being hereinafter  referred to as  the
"Exchange  Fund"). The REIT Shares into which LP Units and GP Interests shall be
converted in the Merger  shall be deemed  to have been  issued at the  Effective
Time.
 
    3.4  NO FRACTIONAL SHARES
 
    No  fractional REIT Shares will be issued  in the Merger. In the event that,
as a result of the  conversion of LP Units or  GP Interests into REIT Shares,  a
limited  partner or General  Partner, as the  case may be,  would be entitled to
receive a fractional REIT Share, a cash  adjustment will be paid in lieu of  any
fractional  REIT Share that would otherwise be  issuable, and the amount of such
cash adjustment shall equal the product  of such fractional amount and the  REIT
Share  Price. The determination under  this Section 3.4 as  to whether a limited
partner would otherwise be entitled to  receive a fractional REIT Share will  be
based  on the  aggregate number of  LP Units  such limited partner  holds in the
applicable Partnership, not on a per LP Unit basis.
 
    3.5  DISSENTING UNITS
 
    Notwithstanding anything in this Agreement to the contrary, LP Units held by
a limited partner  who has  properly exercised dissenters'  rights with  respect
thereto ("Dissenting Units") in accordance with Section 25.10.900 ET SEQ. of the
WULPA  will not be converted into the right to receive the Merger Consideration,
but the holder thereof will instead be  entitled to receive payment of the  fair
value of such LP Units in accordance with the provisions of the WULPA unless and
until  such holder fails  to perfect or  has effectively withdrawn  or lost such
holder's rights to receive fair value  under the WULPA. If, after the  Effective
Time,  any holder of Dissenting  Units withdraws or loses  (through a failure to
perfect or otherwise) such holder's right to receive fair value with respect  to
the Dissenting Units, such Dissenting Units will automatically be converted into
the right to receive the Merger
 
                                      A-5
<PAGE>
Consideration  pursuant to Section  3.1 hereof. The  Partnerships shall give the
Company prompt notice of any  demands received by them  for the receipt of  fair
value  for LP Units and, prior to the  Effective Time, the Company will have the
right to participate in  all negotiations and proceedings  with respect to  such
demands.  Prior to the Effective Time, the Partnerships may not, except with the
Company's prior written consent, make any payment with respect to, or settle  or
offer to settle, any such demands.
 
    3.6  ISSUANCE OF CERTIFICATES FOR REIT SHARES
 
    As  soon as  practicable after the  Effective Time, the  Exchange Agent will
advise the beneficial owners of LP  Units of a Participating Partnership of  the
effectiveness  of the  Merger and  will distribute  the Merger  Consideration in
accordance with  instructions  given by  such  beneficial owners.  None  of  the
Company,  the Partnerships, the Surviving Corporation, the Exchange Agent or any
other person shall be liable  to any former holder of  LP Units or GP  Interests
for  any amount properly  delivered to a public  official pursuant to applicable
abandoned property, escheat or similar laws.
 
    Any  portion  of  the  Exchange  Fund  (including  the  proceeds  from   any
investments  thereof and any  REIT Shares) that remains  unclaimed by the former
partners of the Participating Partnerships  six months after the Effective  Time
shall  be  delivered to  the Surviving  Corporation. Any  former partner  of the
Participating Partnerships who  has not theretofore  complied with this  Article
III  shall thereafter look only to the  Surviving Corporation for payment of the
applicable Merger Consideration and  unpaid dividends and distributions  payable
with respect thereto, in each case without any interest thereon.
 
    3.7  TRANSFER OF UNITS
 
    There  will  be no  further registration  of  transfers of  LP Units  on the
Partnerships' records after the commencement of the Offers and until the Closing
(as defined in Section 6.1 hereof) or termination of this Agreement, except  for
the  transfer of LP  Units to the  Company pursuant to  the Offers and custodial
transfers, intrafamily  transfers,  including  transfers  to  trusts,  transfers
pursuant  to divorce decrees and transfers  relating to deaths or settlements of
estates.
 
ARTICLE IV.  REPRESENTATIONS AND WARRANTIES
 
    4.1  REPRESENTATIONS AND WARRANTIES OF THE PARTNERSHIPS
 
    For the purposes of inducing the Company to enter into this Agreement and to
consummate the  Merger,  each  of  the  Partnerships  severally  represents  and
warrants to the Company as follows with respect to itself and its Assets:
 
    (a)   ORGANIZATION.  The Partnership is a limited partnership duly organized
and validly existing under the laws of the state of Washington. The  Partnership
has  provided  the Company  with a  true and  complete copy  of its  Amended and
Restated Agreement  of  Limited  Partnership  and  all  amendments  thereto  (as
amended, the "Partnership Agreement"). The Partnership has no direct or indirect
equitable or beneficial ownership interest in any other entity, except as may be
disclosed in the Partnership SEC Documents (as defined hereof).
 
    (b)   POWER AND AUTHORITY.  The Partnership (i) has the authority to conduct
its business as currently conducted and  to own and operate the properties  that
it  now owns and operates, (ii) is qualified to do business in all jurisdictions
in which such  qualification is  necessary, except where  the failure  to be  so
qualified would not have a material adverse effect on the Partnership, and (iii)
has  all requisite power, authority and legal right to enter into this Agreement
and to consummate the  Merger. The execution and  delivery of this Agreement  by
the  Partnership and, subject to  the approval of this  Agreement by the limited
partners of the Partnership, the consummation  by the Partnership of the  Merger
have been duly authorized by all necessary partnership action on the part of the
Partnership,  and this Agreement is a legal, valid and binding obligation of the
Partnership, enforceable against the Partnership in accordance with its terms.
 
                                      A-6
<PAGE>
    (c)   NO VIOLATIONS.   Except  to the  extent that  lender consents  may  be
required  from mortgagees having liens against  the Property and except for such
other consents as have been obtained or  will be obtained prior to the  Closing,
and  assuming  approval  of  this  Agreement  by  the  limited  partners  of the
Partnership, the  execution and  delivery  of this  Agreement  do not,  and  the
consummation  of the Merger and compliance  with the provisions hereof will not,
result in any breach or violation of any (i) agreement to which the  Partnership
is  a party  or by  which it  or any of  its Assets  may be  bound, (ii) permit,
license or other governmental authorization applicable to the Partnership or its
Assets, or (iii)  judgment, order,  law, rule  or regulation  applicable to  the
Partnership  or its Assets, other  than any such items  that in the aggregate do
not have a material adverse effect  on the Partnership's ability to perform  its
obligations  under this Agreement or a  material adverse effect on the financial
condition of the Partnership.
 
    (d)  SEC  DOCUMENTS.   The Partnership has  furnished and  will continue  to
furnish  the Company  with a  true and complete  copy of  each report, schedule,
registration statement and definitive proxy  statement filed by the  Partnership
with the Commission since January 1, 1994 (the "Partnership SEC Documents"). The
Partnership  SEC  Documents furnished  to the  Company  as of  the date  of this
Agreement are  all the  documents  (other than  preliminary material)  that  the
Partnership has been required to file with the Commission since such date. As of
their respective dates, the Partnership SEC Documents complied as to form in all
material  respects  with the  requirements  of the  Securities  Act of  1933, as
amended (the "Securities  Act"), and the  Exchange Act, as  applicable, and  the
applicable  rules and regulations of the  Commission thereunder, and none of the
Partnership SEC Documents contained any untrue  statement of a material fact  or
omitted  to state a material fact required  to be stated therein or necessary in
order to make the statements therein, in light of the circumstances under  which
they were made, not misleading.
 
    (e)   FINANCIAL  STATEMENTS.   The financial  statements of  the Partnership
included  in  the   Partnership  SEC  Documents   (the  "Partnership   Financial
Statements")  complied, as of the date of the applicable document, as to form in
all material  respects with  applicable  accounting requirements  and  published
rules and regulations of the Commission with respect thereto, have been prepared
in  accordance with generally accepted accounting principles, applied on a basis
consistent with prior periods (except  as otherwise noted therein), and  present
fairly the financial position and results of operations of the Partnership as of
their  respective dates and  for the periods presented  therein (subject, in the
case of unaudited interim financial statements, to normal year-end adjustments).
 
    (f)   FULL  DISCLOSURE;  NO  MISSTATEMENTS.    The  representations  of  the
Partnership contained in this Agreement do not contain any untrue statement of a
material  fact  or  omit  to  state any  material  fact  necessary  to  make the
statements made herein not misleading, and  none of the information supplied  or
to  be  supplied by  the Partnership  for  inclusion in  the Offer  Documents or
registration statement on Form S-4 provided for in Section 5.9 hereof (the  "S-4
Registration  Statement")  or  the  Proxy  Statement/Prospectus  (as  defined in
Section 5.9 hereof) contains any untrue statement of a material fact or omits to
state any material fact required to be  stated therein or necessary in order  to
make  the statements therein, in light of the circumstances under which they are
made, not misleading. If at any time  prior to the termination of the Offer  or,
with    respect   to   the    S-4   Registration   Statement    or   the   Proxy
Statement/Prospectus, prior  to the  Closing  Date (as  defined in  Section  6.1
hereof),  any event relating to the Partnership should occur that is required to
be described  in an  amendment of  or  supplement to  the Offer  Documents,  S-4
Registration  Statement  or  the  Proxy  Statement/Prospectus,  the  Partnership
promptly shall inform the Company and assist in the preparation, filing and,  if
necessary, dissemination of such amendment or supplement.
 
    (g)   NO DEFAULTS.   The Partnership is  not in default  or violation of any
term, condition or  provision of  any agreement to  which the  Partnership is  a
party  or by which  it or any of  its Assets may be  bound that would materially
interfere with  the Partnership's  participation  in the  Merger or  that  would
result  in  a  material liability  not  reflected in  the  Partnership Financial
Statements.
 
                                      A-7
<PAGE>
    (h)  ABSENCE OF LITIGATION.  There is no suit, action or proceeding  pending
or,  to  the Partnership's  knowledge, threatened  against the  Partnership that
might materially  adversely affect  the Partnership's  ability to  perform  this
Agreement or to consummate the transactions contemplated hereby.
 
    (i)   NO MATERIAL  ADVERSE CHANGES.   Except as disclosed  in writing to the
Special Committee concurrently with the execution of this Agreement, there  have
been no material adverse changes in the business, operations, properties, assets
or  condition, financial or otherwise, of the Partnership from that set forth in
the Partnership's Annual  Report on Form  10-K for the  year ended December  31,
1995, as supplemented by the Partnership's Quarterly Report on Form 10-Q for the
quarter ended March 31, 1996, both as filed with the Commission.
 
    (j)   TITLE TO ASSETS.  The Partnership has good and marketable title to the
assets reflected in the most recent balance sheet (the "Balance Sheet") included
in the Partnership Financial Statements and reflected in its Net Asset Value and
will hold good and marketable title to  such assets, and any assets acquired  by
the  Partnership prior to the  Effective Time, except for  assets disposed of in
the ordinary  course  of  business (which  assets  do  not include  any  of  the
Property)  and except as  the failure of  the Partnership to  have such good and
marketable title is  not, in  the aggregate,  material to  the Partnership.  The
assets  reflected on the Balance Sheet include the Property. Except as otherwise
disclosed in the Balance Sheet or related notes accompanying it, all the  assets
referred  to in the preceding  sentence are owned free and  clear of any and all
material adverse claims,  security interests, charges  or other encumbrances  or
restrictions  of every nature,  except liens for  current taxes not  yet due and
payable or  landlords' liens  as provided  for  in the  relevant leases,  or  by
applicable law.
 
    (k)    LIABILITIES OF  THE  PARTNERSHIP.   The  Partnership has  no material
liabilities, contingent or otherwise, except  to the extent reflected,  reserved
against  or  provided for  in the  Balance  Sheet, and  except for  any material
liabilities disclosed in writing to the Special Committee concurrently with  the
execution  of this Agreement or any other obligations incurred after the date of
the Balance  Sheet  in  the  ordinary course  of  business,  which  subsequently
incurred  obligations are  of an  amount and  nature as  to be  capable of being
discharged from the operations of  the Partnership without requiring  additional
equity or borrowing.
 
    (l)  PROPERTY.
 
        (i)   Materially complete and correct legal descriptions of the Property
    have been delivered to the Company  concurrently with the execution of  this
    Agreement.
 
        (ii)   All information provided by the Partnership to the Appraiser with
    respect to the Property for use in preparing the appraisals of the  Property
    was true and correct in all material respects as of the date given.
 
        (iii)    Except  as  disclosed  in  writing  to  the  Special  Committee
    concurrently with the execution of this Agreement, to the best knowledge  of
    those  representatives and agents  of the Partnership  to whom notice should
    have been given, there is no material violation of any law, ordinance, rule,
    requirement, resolution, policy statement or regulation (including,  without
    limitation,  those relating to land use, subdivision, zoning, environmental,
    occupational health and safety, water, and  building and fire codes) of  any
    governmental authority (collectively, "Governmental Regulations") applicable
    to the construction, alteration, rehabilitation, maintenance, use, operation
    or  sale  of any  of the  Property,  which violation  would have  a material
    adverse effect  on the  use of  the Property.  The Partnership  has  neither
    received  notice nor has  knowledge that any  governmental authority, or any
    employee or agent thereof, considers the operations, use or ownership of any
    of the  Property  to violate  or  have violated  in  a material  manner  any
    Governmental Regulations, or that any investigation has been commenced or is
    contemplated regarding such possible violation.
 
        (iv)   To the best knowledge of  those representatives and agents of the
    Partnership to  whom notice  should  have been  given, the  Partnership  has
    neither  received  notice nor  has knowledge  of  any plan  or study  of any
    governmental authority that  would materially  adversely affect  the use  of
 
                                      A-8
<PAGE>
    the  Property for  its intended uses,  or result in  any public improvements
    that will  result  in any  material  charge  being levied  against,  or  any
    material lien assessed upon, all or any portion of such Property.
 
        (v)     Except  as  disclosed  in   writing  to  the  Special  Committee
    concurrently with the execution of this Agreement, to the best knowledge  of
    those  representatives and agents  of the Partnership  to whom notice should
    have been given, there are no delinquent taxes, assessments, charges, debts,
    liabilities, claims or  obligations arising from  the construction,  design,
    development,  ownership, maintenance or operation  of, or otherwise relating
    to, the  Property,  which matters  could  give  rise to  any  mechanics'  or
    materialmen's or other statutory or common-law lien against such Property or
    any  party  thereof that,  individually or  in the  aggregate, would  have a
    material adverse effect on the value of the Property, taken as a whole.
 
        (vi)    Except  as  disclosed  in  writing  to  the  Special   Committee
    concurrently  with the execution of this Agreement, to the best knowledge of
    those representatives and agents  of the Partnership  to whom notice  should
    have  been given or who, by virtue of his or her position, could be expected
    to have knowledge of any of the following matters, (A) none of the Property,
    which for  purposes of  this paragraph  shall include,  without  limitation,
    subsurface soil and ground water, contains any substance, including, without
    limitation, any asbestos, formaldehyde, radioactive substance, hydrocarbons,
    industrial  solvents, flammables, explosives and  any hazardous substance or
    toxic material (collectively, "Hazardous  Materials"), that could  presently
    or  at any time  in the future  cause a material  detriment to or materially
    impair the value or beneficial use of the Property or constitute or cause  a
    health,  safety or environmental hazard on or relating to the Property or to
    any person who  may enter onto  the Property or  require remediation at  the
    behest  of any  governmental agency,  which health,  safety or environmental
    hazard  or  remediation  could  have  a  material  adverse  effect  on   the
    Partnership;  (B) there are  no environmental conditions  relating to any of
    the Property  giving rise  to material  liability, and  the Property  is  in
    compliance  in all material respects with existing applicable federal, state
    and local environmental laws  and regulations; and  (C) the Partnership  has
    not  received notice that the ownership, operation, use and condition of any
    of the  Property  is  in violation  of  any  federal, state  or  local  law,
    ordinance   or  regulation  pertaining   to  industrial  hygiene,  Hazardous
    Materials  or  environmental  protection.  To  the  best  knowledge  of  the
    Partnership,  there is  no proceeding  or action  pending or,  to its actual
    knowledge, threatened by  any person  or governmental  agency regarding  the
    environmental condition of any of the Property.
 
        (vii)   The Partnership has not entered  into any contracts for the sale
    of all or any portion of the Property.
 
    (m)  TAXES.   The Partnership  has filed  all federal, state  and local  tax
returns  that it is required  to file, has provided  to its limited partners all
required Forms K-1 and such other tax forms as may be required by federal, state
or local authorities, and has no outstanding material liability for any federal,
state or local taxes or interest or penalties thereon, whether disputed or  not,
except  taxes  disputed  or not  yet  payable  that have  been  provided  for in
accordance with generally  accepted accounting principles  and are disclosed  in
the   Partnership  Financial  Statements;  the   Partnership  is  taxable  as  a
partnership (and not as an association taxable as a corporation) for federal and
applicable state income tax purposes.
 
    4.2  REPRESENTATIONS AND WARRANTIES OF THE COMPANY
 
    For the purposes  of inducing each  of the Partnerships  to enter into  this
Agreement  and to consummate the Merger,  the Company represents and warrants to
each Partnership as follows:
 
    (a)  ORGANIZATION;  POWER AND  AUTHORITY.   The Company  is duly  organized,
validly  existing and in good standing under  the laws of the state of Delaware.
The Company (i) has the authority to conduct its business as currently conducted
and to own and  operate the properties  that it now owns  and operates, (ii)  is
qualified  to do  business in all  jurisdictions in which  such qualification is
necessary,
 
                                      A-9
<PAGE>
except where the failure to  be so qualified would  not have a material  adverse
effect  on the Company, and  (iii) has all requisite  power, authority and legal
right to enter into this Agreement  and to consummate the Merger. The  execution
and  delivery  of this  Agreement by  the  Company and  the consummation  by the
Company of  the Merger  have been  duly authorized  by all  necessary  corporate
action  on the  part of the  Company, and this  Agreement is a  legal, valid and
binding obligation of the Company, enforceable against the Company in accordance
with its terms.
 
    (b)  CONSENTS.  Except as expressly contemplated by this Agreement, no other
action is required to be taken by the Company to permit the execution,  delivery
and  performance  of  this  Agreement,  all  other  documents  and  certificates
expressly contemplated hereby, and the Merger, and no consent or approval of any
third party  or governmental  authority is  or was  required or  appropriate  in
connection   with  the  execution  of  this  Agreement,  or  to  consummate  the
transactions expressly contemplated hereunder, except such as have been obtained
or will be obtained prior to the Closing.
 
    (c)  NO VIOLATIONS.   The execution and delivery  of this Agreement do  not,
and  the consummation  of the Merger  and compliance with  the provisions hereof
will not, result  in any breach  or violation of  any (i) agreement  (including,
without  limitation,  the organizational  documents under  which the  Company is
organized) to  which the  Company  is a  party or  by  which it  or any  of  its
properties   may  be   bound,  (ii)   permit,  license   or  other  governmental
authorization applicable to the  Company or its  properties, or (iii)  judgment,
order,  law, rule or regulation  applicable to the Company,  other than any such
items that  in the  aggregate  do not  have a  material  adverse effect  on  the
Company's  ability to perform its obligations under this Agreement or a material
adverse effect on the value of the Merger Consideration.
 
    (d)  CAPITALIZATION.  The authorized  capital stock of the Company  consists
of  (i) 120,000,000 REIT  Shares, (ii) 500,000  shares of Class  B Common Stock,
$.001 par value per share, (iii)  160,000,000 shares of Excess Stock, $.001  par
value  per share, and (iv) 80,000,000 shares of Preferred Stock, $.001 par value
per share.  All outstanding  REIT Shares  are duly  authorized, validly  issued,
fully  paid and nonassessable, and  no class of capital  stock of the Company is
entitled to  preemptive or  cumulative  voting rights.  As  of March  31,  1996,
23,046,517  REIT Shares, 154,605  shares of Class  B Common Stock,  no shares of
Excess Stock, and no shares of Preferred Stock were issued and outstanding.
 
    (e)  AUTHORIZATION OF REIT SHARES.  Prior to the Effective Time, the Company
will have taken all necessary  action to permit it to  issue the number of  REIT
Shares  required to be issued  pursuant to Article III  hereof. Such REIT Shares
will, when  issued  pursuant to  this  Agreement, be  duly  authorized,  validly
issued,  fully paid  and nonassessable, and  no stockholder of  the Company will
have any preemptive right  of subscription or purchase  in respect thereof.  The
REIT  Shares will, when  issued pursuant to this  Agreement, be registered under
the Securities  Act and  the Exchange  Act, will  be registered  or exempt  from
registration  under all applicable state securities  laws and will be listed for
quotation on the NYSE.
 
    (f)  SEC DOCUMENTS.  The Company has furnished and will continue to  furnish
the  Partnerships  with  a true  and  complete  copy of  each  report, schedule,
registration statement and definitive proxy statement filed by the Company  with
the  Commission since January 1, 1994 (the "Company SEC Documents"). The Company
SEC Documents furnished to the Partnerships as of the date of this Agreement are
all the documents (other  than preliminary material) that  the Company has  been
required  to file with  the Commission since  such date. As  of their respective
dates, the Company SEC  Documents complied as to  form in all material  respects
with the requirements of the Securities Act and the Exchange Act, as applicable,
and  the applicable rules and regulations of the Commission thereunder, and none
of the Company SEC Documents contained  any untrue statement of a material  fact
or  omitted to state a material fact  required to be stated therein or necessary
in order to  make the statements  therein, in light  of the circumstances  under
which they were made, not misleading.
 
    (g)  FINANCIAL STATEMENTS.  The financial statements of the Company included
in  the  Company  SEC Documents  complied,  as  of the  date  of  the applicable
document, as  to  form  in  all material  respects  with  applicable  accounting
requirements  and  published  rules  and  regulations  of  the  Commission  with
 
                                      A-10
<PAGE>
respect thereto,  have  been  prepared in  accordance  with  generally  accepted
accounting  principles, applied on a basis consistent with prior periods (except
as otherwise  noted therein),  and  present fairly  the financial  position  and
results  of operations of the  Company as of their  respective dates and for the
periods presented therein (subject, in  the case of unaudited interim  financial
statements, to normal year-end adjustments).
 
    (h)   FULL DISCLOSURE; NO MISSTATEMENTS.  The representations of the Company
contained in this Agreement  do not contain any  untrue statement of a  material
fact  or omit  to state a  material fact  necessary to make  the statements made
herein not misleading, and none of the information supplied or to be supplied by
the Company for inclusion or incorporation by reference in the S-4  Registration
Statement, the Offer Documents or the Proxy Statement/Prospectus relating to the
Company  contains any untrue statement of a  material fact or omits to state any
material fact required to be  stated therein or necessary  in order to make  the
statements therein, in light of the circumstances under which they are made, not
misleading.  If  at any  time prior  to the  termination of  the Offer  or, with
respect to the S-4 Registration Statement or the Proxy Statement/Prospectus, the
Closing Date, any event relating to the Company should occur that is required to
be described in  an amendment of  or supplement  to the Offer  Documents or  the
Proxy  Statement/Prospectus, the Company promptly  shall inform the Partnerships
and prepare, file and, if necessary, disseminate such amendment or supplement.
 
    (i)  ABSENCE OF LITIGATION.  There is no suit, action or proceeding  pending
or,  to  the  Company's knowledge,  threatened  against the  Company  that might
materially adversely affect the Company's  ability to perform this Agreement  or
to consummate the transactions contemplated hereby.
 
    (j)   NO  MATERIAL ADVERSE  CHANGES.   There have  been no  material adverse
changes in the business, operations, properties, assets or condition,  financial
or  otherwise, of the Company from that set forth in the Company's Annual Report
on Form  10-K for  the year  ended December  31, 1995,  as supplemented  by  the
Company's  Quarterly Report on Form  10-Q for the quarter  ended March 31, 1996,
both as filed with the Commission.
 
ARTICLE V.  COVENANTS AND AGREEMENTS
 
    During the period from the date  of this Agreement and continuing until  the
Closing  Date or the termination of this  Agreement, the Company and each of the
Partnerships agree to act in accordance with the following covenants:
 
    5.1  ORDINARY COURSE; NO ACQUISITIONS OR DISPOSITIONS
 
    Except as provided in  Section 5.2 hereof, each  Partnership shall carry  on
its  business  in  the  ordinary  course in  substantially  the  same  manner as
heretofore conducted and use all reasonable  efforts to (a) preserve intact  its
present  business, organization and goodwill, (b) maintain all permits, licenses
and  authorizations  required   by  applicable  laws,   and  (c)  preserve   its
relationships with customers, suppliers, lenders, lessors, governmental entities
and  others having business or regulatory dealings with it. No Partnership shall
acquire or agree to acquire by any manner any business or business  organization
or division thereof or otherwise acquire or agree to acquire any assets that are
material,  individually or  in the  aggregate, to  such Partnership,  other than
high-quality, short-term investments made in the ordinary course of business. No
Partnership shall sell, lease or otherwise  dispose of, or agree to sell,  lease
or  otherwise dispose of,  any of its  Assets, except in  the ordinary course of
business and consistent with past practice, and except as required by law.  Each
Partnership  shall promptly notify the Company of any event or occurrence not in
the ordinary course of business  or that may have  a material adverse effect  on
such Partnership's financial condition.
 
    5.2  DISTRIBUTIONS
 
    Each  Partnership  shall  use  its  best  efforts  to  manage  its business,
including, but not limited to, suspending cash distributions to its partners  if
the  General Partner deems it  advisable to do so,  such that such Partnership's
Closing Net  Asset Value  (as defined  in Section  5.2 hereof)  will equal  such
Partnership's   Net  Asset  Value.  Immediately   prior  to  the  Closing,  each
Partnership will declare a cash
 
                                      A-11
<PAGE>
distribution payable to those who are  partners of the Partnership at such  time
in  an aggregate amount equal to the amount, if any, by which such Partnership's
Closing Net  Asset Value  exceeds its  Net Asset  Value. As  soon as  reasonably
practicable  following the Closing,  the Company, as  the Surviving Corporation,
will take all  actions necessary to  transfer the amount  necessary to pay  such
distribution to Gemisys Corporation, the transfer and distribution agent for the
Partnership,  for distribution in  accordance with the  terms of the Partnership
Agreement.
 
    As used herein, "Closing Net Asset Value" means, with respect to each of the
Partnerships, (i) the sum of  (a) the Appraised Value  (b) the cost incurred  to
the  Closing  Date of  buildouts and  unit  conversions, if  any, that  were not
reflected in the Appraised Value and (c) the book values of the non-real  estate
assets,  except for  amortizable assets,  of the  Partnership as  of the Closing
Date, less (ii) the sum of (x) such Partnership's liabilities as of the  Closing
Date, (y) the estimated cost remaining to be incurred, if any, as of the Closing
Date  to complete the buildouts  and unit conversions that  were included in the
Appraised Value, and (z) such Partnership's Individual Transaction Expenses  and
pro  rata share  of Shared  Transaction Expenses (as  such terms  are defined in
Section 8.3(a) hereof).
 
    5.3  AMENDMENT OF GOVERNING DOCUMENTS
 
    The IDS2 and  IDS3 Partnerships shall  take all actions  necessary to  amend
their  respective  Partnership Agreements  to  add the  following  subsection to
Section 13.3(c) of those  agreements, it being understood  that the approval  of
such  amendment by  limited partners will  be a  part of their  approval of this
Agreement and the transactions contemplated hereby:
 
       (iii) Notwithstanding any  provision of this  Agreement, the  Partnership
       may  merge with and  into Shurgard Storage  Centers, Inc. (the "Company")
       pursuant to, and consummate all  other transactions contemplated by,  the
       terms  of  the  Acquisition Agreement  dated  July 1,  1996,  between the
       Company, the  Partnership,  IDS/Shurgard  Income  Growth  Partners  L.P.,
       IDS/Shurgard  Income  Growth  Partners L.P.  II  and  IDS/Shurgard Income
       Growth Partners L.P. III.
 
    Except as provided above, no Partnership shall amend or propose to amend any
of  its  organizational   documents,  including  its   Certificate  of   Limited
Partnership  or Partnership Agreement, without the  prior written consent of the
Company.
 
    5.4  EXCLUSIVITY
 
    No Partnership will, nor will it permit its partners (including any  general
or  limited partner  of its  General Partner),  agents or  other representatives
(including, without limitation,  any investment banker,  attorney or  accountant
retained  by it) to, directly or  indirectly, initiate, solicit or encourage or,
except as  required  by law,  including  fiduciary  duties required  by  law  as
determined  by  the General  Partner  in good  faith,  engage in  discussions or
negotiations with or provide any information to any entity or group (other  than
the Company or an affiliate of the Company) concerning any acquisition proposal,
tender  offer,  exchange offer,  merger,  consolidation, sale  of  a substantial
amount of assets, or  sale of securities or  equity interests, or in  connection
with   a  liquidation,   dissolution  or  similar   transaction  involving  such
Partnership. Each Partnership will  notify the Company  immediately if any  such
inquiries  or proposals are received by, any such information is requested from,
or any such negotiations or discussions are sought to be initiated or  continued
with,  the Partnership,  and will  keep the Company  informed of  the status and
terms of any such proposals and any such negotiations or discussions.
 
    5.5  OTHER ACTIONS
 
    The Partnerships and the Company shall not  take or omit to take any  action
that  would  result  in  any  of  the  representations  and  warranties  of  the
Partnerships or the Company, respectively, made in or pursuant to this Agreement
becoming untrue or  incomplete, in any  of the covenants  and agreements of  the
Partnerships  or the  Company, respectively,  being breached,  or in  any of the
conditions to the Closing not being satisfied.
 
                                      A-12
<PAGE>
    5.6  ADVISE OF CHANGES
 
    Each Partnership  promptly shall  advise  the Company  in writing,  and  the
Company  promptly shall  advise the  Partnerships in  writing, of  any change or
event that  has  made,  or could  be  reasonably  expected to  make,  untrue  or
inaccurate  any representation or warranty made by  such party in or pursuant to
this Agreement or  that has  prevented or may  prevent the  performance by  such
party of any covenant or agreement made in or pursuant to this Agreement.
 
    5.7  MEETINGS OF LIMITED PARTNER
 
    Each   Partnership  will  take  all  action  necessary  in  accordance  with
applicable law and its Partnership Agreement to convene a meeting of its limited
partners as promptly as practicable to  consider and vote upon approval of  this
Agreement and the consummation of the Merger.
 
    5.8  REGISTRATION AND LISTING OF REIT SHARES
 
    The  Company will use its best efforts to register the REIT Shares under the
Securities Act and to cause the REIT Shares to be listed for trading on the NYSE
upon official notice of issuance.
 
    5.9  S-4 REGISTRATION STATEMENT AND PROXY STATEMENT/PROSPECTUS
 
    The Company and  the Partnerships will  promptly prepare and  file with  the
Commission  a preliminary proxy statement/prospectus in connection with the vote
of the limited partners  of the Partnerships on  the approval of this  Agreement
and  the  consummation  of  the  transactions  contemplated  hereby  (such proxy
statement/prospectus,  together  with  any  amendments  thereof  or  supplements
thereto,  in each case in the form or forms to be mailed to the limited partners
of the Partnerships, being called herein the "Proxy Statement/Prospectus").  The
Company  will, as promptly as practicable,  prepare and file with the Commission
the S-4 Registration  Statement, containing the  Proxy Statement/Prospectus,  in
connection  with the registration under the Securities Act of the REIT Shares to
be issued in the Merger.  The Company and the  Partnerships will each use  their
best  efforts to have  the S-4 Registration Statement  declared effective by the
Commission as  promptly as  practicable, and  also will  take any  other  action
required  to be taken  under federal or  state securities laws,  and each of the
Partnerships will use its best  efforts to cause the Proxy  Statement/Prospectus
to  be mailed to  the record and beneficial  owners of LP  Units at the earliest
practicable date.  The Company  agrees that  (a) if  at any  time prior  to  the
Effective  Time  any event  with respect  to  the Company  should occur  that is
required to be  described in  an amendment  of, or  a supplement  to, the  Proxy
Statement/  Prospectus or the S-4 Registration Statement, such event shall be so
described, and such  amendment or supplement  shall be promptly  filed with  the
Commission  and, as required by law, the Partnership will cause the amendment or
supplement to be disseminated  to the record and  beneficial owners of LP  Units
and  (b) the S-4 Registration Statement  and the Proxy Statement/Prospectus will
(with respect to the Company)  comply as to form  in all material respects  with
the requirements of the federal securities laws. Each of the Partnerships agrees
that  (i) if at any time  prior to the Effective Time  any event with respect to
the Partnership should occur  that is required to  be described in an  amendment
of,  or a supplement to, the  Proxy Statement/Prospectus or the S-4 Registration
Statement, such event shall  be so described, and  such amendment or  supplement
shall   be  promptly  filed  with  the  Commission  and,  as  required  by  law,
disseminated to the record and beneficial owners of LP Units and (ii) the  Proxy
Statement/Prospectus will (with respect to the Partnership) comply as to form in
all  material respects with the requirements of the federal securities laws. The
Proxy  Statement/Prospectus  shall  include   the  recommendation  and   consent
described in Section 2.1 of the General Partner Undertaking.
 
    5.10  CONSENTS AND APPROVALS
 
    The  Company and the  Partnerships shall each use  all reasonable efforts to
take, or cause to  be taken, all  actions and to  do, or cause  to be done,  all
other  things necessary, proper or advisable to consummate and make effective as
promptly as  practicable the  transactions contemplated  by this  Agreement,  to
obtain   in  a  timely  manner   all  necessary  consents,  waivers,  approvals,
authorizations and orders and to  make all necessary registrations and  filings,
and  otherwise to satisfy or  cause to be satisfied  all conditions precedent to
its obligations under this Agreement.
 
                                      A-13
<PAGE>
    5.11  LIMITATION ON NUMBER OF REIT SHARES ISSUED
 
    Notwithstanding any other provision of this Agreement, in the event that the
payment  of Merger Consideration in  the Merger would result  in the issuance by
the Company  of  more  than  20%  of  the  total  number  of  REIT  Shares  then
outstanding,  then the Company may elect to pay cash in lieu of such REIT Shares
in excess of 20% of the total  number of REIT Shares then outstanding (with  the
cash amount to be paid in lieu of such REIT Shares to be based on the REIT Share
Price),  and such cash  in lieu of  REIT Shares shall,  to the extent reasonably
practicable, be allocated  proportionately to all  partners in the  Partnerships
receiving Merger Consideration.
 
ARTICLE VI.  CLOSING
 
    6.1  CLOSING DATE
 
    The  consummation of  the transactions  contemplated hereby  (the "Closing")
shall be held within  five business days  of the satisfaction  or waiver of  the
conditions to closing set forth in Article VII hereof. The Closing shall be held
at  the  offices  of  Perkins  Coie, 1201  Third  Avenue,  40th  Floor, Seattle,
Washington, or at  such other  place as  may be agreed  upon in  writing by  the
Participating Partnerships and the Company. The date and hour of the Closing are
referred to as the "Closing Date." At the Closing each of the parties shall take
all  such action and  deliver all such  documents, instruments, certificates and
other items as may  be required under  this Agreement or  otherwise in order  to
perform  or fulfill all covenants,  conditions and agreements on  its part to be
performed or  fulfilled  on or  prior  to the  Closing  Date and  to  cause  all
conditions  precedent to the other parties'  obligations under this Agreement to
be satisfied in full.
 
    6.2  ADDITIONAL CLOSINGS
 
    Notwithstanding any other  provision of  this Agreement,  if the  conditions
precedent  to Closing  set forth  in Article VII  hereof have  been satisfied or
waived with  respect  to  the  Closing  of this  Agreement  as  to  one  or  two
Participating  Partnerships, this Agreement  may be closed  with respect to such
Participating Partnership(s)  and,  in the  event  the conditions  precedent  to
Closing  set forth  in Article VII  hereof are subsequently  satisfied or waived
with respect to  any additional  Participating Partnership(s), there  may be  an
additional   Closing   or   Closings   with   respect   to   such  Participating
Partnership(s). All references herein to the Closing and the Closing Date  shall
mean  the original Closing or such additional Closing(s), as applicable, and all
references herein to Effective Time shall mean the Effective Time of the  Merger
of  the  applicable  Participating  Partnership;  provided,  however,  that  the
determination of the amount of  Shared Transaction Expenses pursuant to  Section
8.3  hereof shall be made prior to the  initial Closing and shall not be further
adjusted at any subsequent Closing.
 
    6.3  FURTHER ACTS
 
    If at any  time after  the Closing  Date any further  action by  any of  the
parties to this Agreement is necessary or desirable to carry out the purposes of
this Agreement and/or to vest in the Company full title to all Assets and rights
of  the Participating Partnerships, such party  shall take all such necessary or
desirable action or use its best efforts to cause such action to be taken.
 
ARTICLE VII.  CONDITIONS
 
    The respective obligations of  the parties hereto  to consummate the  Merger
pursuant  to the  terms of  this Agreement  are subject  to satisfaction  of the
following conditions precedent  on or prior  to the Closing  Date. In the  event
that  one or  more of  these conditions  are not  satisfied on  or prior  to the
Closing Date, the party  or parties whose obligations  hereunder are subject  to
the  satisfaction of such condition or  conditions may either elect to terminate
this Agreement or waive the satisfaction of such condition. The consummation  of
the Merger as to any Partnership is not conditioned upon the consummation of the
Merger as to any other Partnership.
 
    7.1  CONDITIONS TO EACH PARTY'S OBLIGATIONS
 
    The  respective  obligations of  each party  to  consummate the  Mergers are
subject to the  fulfillment on or  prior to  the Closing Date  of the  following
conditions:
 
                                      A-14
<PAGE>
    (a)   APPROVAL OF LIMITED PARTNERS.   This Agreement and the consummation of
the Merger shall have been  duly approved by the  requisite vote of the  limited
partners  of the Partnership in accordance with the applicable provisions of its
Partnership Agreement and the WULPA.
 
    (b)  ABSENCE OF  INJUNCTIONS.  No injunctions  relating to the  transactions
contemplated  by this Agreement or  any of the parties  hereto that would have a
material adverse effect on  the Company or  on the business  or Property of  the
Partnerships,   taken  as  a  whole  or  individually,  or  that  would  prevent
consummation of the Merger, shall have been issued and remain outstanding.
 
    (c)   EFFECTIVENESS OF  S-4 REGISTRATION  STATEMENT.   The S-4  Registration
Statement  shall  have  been  declared effective  by  the  Commission  under the
Securities  Act.  No  stop  order  suspending  the  effectiveness  of  the   S-4
Registration  Statement  shall  have  been  issued  by  the  Commission  and  no
proceeding for that purpose  and no similar proceeding  in respect of the  Proxy
Statement/Prospectus shall have been initiated or threatened by the Commission.
 
    (d)   LISTING OF REIT SHARES.  The  REIT Shares issuable in the Merger shall
have been authorized for listing on the NYSE upon official notice of issuance.
 
    7.2  CONDITIONS TO THE OBLIGATIONS OF THE COMPANY
 
    The  obligation  of  the  Company  to  consummate  the  Merger  as  to  each
Partnership  shall be subject to the fulfillment on or prior to the Closing Date
of the following conditions, unless waived in writing by the Company:
 
    (a)  FAIRNESS  OPINION.   The Company shall  have received  an opinion  from
Alex.  Brown  & Sons  Incorporated as  to the  fairness to  the Company,  from a
financial point of view, of the Offer Prices and the Merger Consideration.
 
    (b)  CLOSING NET ASSET VALUE.  The Company shall have received a certificate
from the General Partner dated the Closing Date certifying that the Closing  Net
Asset  Value of  each Partnership  is no less  than its  Net Asset  Value of the
Partnership.
 
    (c)  ABSENCE OF ADVERSE  CHANGE.  Subsequent to  the date hereof, there  has
not  been any material adverse change in the Partnership's ability to consummate
the Merger, or in the Partnership's business, operations, properties, assets  or
condition, financial or otherwise.
 
    (d)  REPRESENTATIONS AND WARRANTIES TRUE AS OF BOTH PRESENT DATE AND CLOSING
DATE.   The representations  and warranties of  the Partnership contained herein
shall be true in all material respects as  of the date of this Agreement and  on
the Closing Date.
 
    (e)   COMPLIANCE  WITH COVENANTS.   The Partnership shall  have performed or
complied with in all material respects all obligations, agreements and covenants
contained in this Agreement to be performed and complied with by it on or  prior
to the Closing Date.
 
    (f)   THIRD-PARTY CONSENTS.  All necessary consents and approvals from third
parties to the transfers,  conveyances and transactions  set forth herein  shall
have been obtained.
 
    (g)   OPINION.  The  Company shall have received  an opinion from counsel to
the Partnership in the form attached hereto as Exhibit B.
 
    (h)  ACCOUNTANT'S LETTER.   The Special Committee  shall have received  from
Deloitte  &  Touche LLP  a letter,  in  form and  substance satisfactory  to the
Special Committee, acting in good faith, applying certain agreed-upon procedures
to designated information contained  in the S-4  Registration Statement and  the
Offer Documents.
 
    7.3  CONDITIONS TO THE OBLIGATIONS OF THE PARTNERSHIPS
 
    The  obligation  of each  of the  Partnerships to  consummate the  Merger is
subject to the  fulfillment on or  prior to  the Closing Date  of the  following
conditions, unless waived in writing by the applicable Partnership:
 
                                      A-15
<PAGE>
    (a)   FAIRNESS OPINION.   The Partnership shall  have received opinions from
Robert A. Stanger & Co., Inc. as to the fairness to the limited partners of  the
Partnership,  from a financial point of view,  of the Offer Price and the Merger
Consideration.
 
    (b)  ABSENCE OF ADVERSE  CHANGE.  Subsequent to  the date hereof, there  has
not  been any material adverse change in the Company's ability to pay the Merger
Consideration, or in the Company's  business, operations, properties, assets  or
condition, financial or otherwise.
 
    (c)  REPRESENTATIONS AND WARRANTIES TRUE AS OF BOTH PRESENT DATE AND CLOSING
DATE.   The representations and warranties of the Company contained herein shall
be true in all  material respects as of  the date of this  Agreement and on  the
Closing Date.
 
    (d)    COMPLIANCE  WITH COVENANTS.    The  Company shall  have  performed or
complied with in all material respects all obligations, agreements and covenants
contained in this Agreement to be performed and complied with by it on or  prior
to the Closing Date.
 
    (e)   THIRD-PARTY CONSENTS.  All necessary consents and approvals from third
parties to the transfers,  conveyances and transactions  set forth herein  shall
have been obtained.
 
    (f)   OPINION.  The Partnership shall  have received an opinion from special
counsel to the Company in the form attached hereto as Exhibit C.
 
ARTICLE VIII.  TERMINATION AND WAIVER
 
    8.1  TERMINATION
 
    With respect to  any Partnership, this  Agreement may be  terminated at  any
time  prior  to  the Effective  Time,  notwithstanding approval  thereof  by the
limited partners of such Partnership:
 
    (a) by  mutual consent  duly authorized  by the  Board of  Directors of  the
Company and the General Partner of the Partnership; or
 
    (b)  by either  the Company or  the Partnership  if the Merger  has not been
consummated by March 31, 1997, or such later date as mutually agreed upon by the
parties; provided, however,  that the  right to terminate  this Agreement  under
this Section 8.1(b) shall not be available to any party whose failure to fulfill
any  obligation under this  Agreement has been  the cause of  or resulted in the
failure of such Merger to occur on or before such date; or
 
    (c) by  either  the Company  or  the Partnership  if  a court  of  competent
jurisdiction  or governmental, regulatory or administrative agency or commission
shall have issued  a nonappealable final  order, decree or  ruling or taken  any
other  action  having  the  effect  of  permanently  restraining,  enjoining  or
otherwise prohibiting  the  Merger  between the  Company  and  the  Partnership;
provided, however, that the right to terminate this Agreement under this Section
8.1(c)  shall  not be  available  to any  party who  has  not complied  with its
obligations under Sections 5.9 and 5.10 hereof and such noncompliance materially
contributed to the issuance of any such order, decree or ruling or the taking of
such action; or
 
    (d) by either the Company  or the Partnership if  the requisite vote of  the
limited  partners of the Partnership  shall not have been  obtained by March 31,
1997; or
 
    (e) by  the Company  if (i)  the General  Partner of  the Partnership  shall
withdraw  or  change  its approval  of  this  Agreement or  the  General Partner
Recommendation in a manner determined by the Company in good faith to be adverse
to the Company or shall have resolved to  do so; or (ii) the General Partner  of
the  Partnership,  shall  have  recommended  to  the  limited  partners  of  the
Partnership an Alternative Transaction (as defined in Section 8.3(c) hereof); or
(iii) any person (other than the Company  or an affiliate of the Company)  shall
have acquired voting rights to, or the right to acquire voting rights to, or any
"group"  (as such term is  defined in Section 14(d) of  the Exchange Act and the
rules and regulations promulgated thereunder)  shall have been formed which  has
voting rights to, or
 
                                      A-16
<PAGE>
the  right to acquire voting  rights to, 20% or  more of the then-outstanding LP
Units of such Partnership; or (iv) if the REIT Share Price, without taking  into
account the application of the REIT Share Price Range, exceeds $28.50; or
 
    (f)  by the Company or the Partnership if (i) any representation or warranty
of the Partnership  or the Company,  respectively, set forth  in this  Agreement
shall  be materially untrue when made or  shall become materially untrue or (ii)
upon a breach of any covenant or agreement on the part of the Partnership or the
Company, respectively, set forth in this Agreement, such that the conditions set
forth in Section  7.2(e) or  7.3(d) hereof,  as the case  may be,  would not  be
satisfied  (either (i)  or (ii) above  being a  "Terminating Breach"); provided,
however, that if such Terminating Breach is  curable prior to March 31, 1997  by
the  Company or the Partnership, as the case may be, through the exercise of its
reasonable best efforts and for  so long as the  Company or the Partnership,  as
the case may be, continues to exercise such reasonable best efforts, neither the
Partnership  nor the Company,  respectively, may terminate  this Agreement under
this Section 8.1(f); or
 
    (g) by  the Partnership  or the  Company if  the Partnership  enters into  a
definitive agreement accepting an Alternative Transaction; or
 
    (h)  by the Partnership if the REIT Share Price, without taking into account
the application  of the  REIT Share  Price Range,  is less  the $21.50  and  the
Company  has not agreed  to pay the Additional  Consideration in accordance with
Section 2.2 of the General Partner Undertaking.
 
    The right of any party hereto  to terminate this Agreement pursuant to  this
Section  8.1 shall remain operative  and in full force  and effect regardless of
any investigation  made  by  or  on  behalf of  any  party  hereto,  any  person
controlling  any  such party  or any  of  their respective  officers, directors,
partners or  stockholders, whether  prior  to or  after  the execution  of  this
Agreement.
 
    8.2  EFFECT OF TERMINATION
 
    In  the event of  termination of this  Agreement as provided  in Section 8.1
hereof, this Agreement  shall become  void and there  shall be  no liability  or
obligation  on  the  part of  any  party  hereto or  its  respective affiliates,
partners, officers, directors or stockholders  except (a) for the provisions  of
Section  1.3(d) (if, and only if, an  Offer has been consummated and the Company
has been  admitted as  a  limited partner  of  the applicable  Partnership  with
respect  to the LP Units  purchased in the Offer)  and Section 8.3 hereof, which
provisions shall  survive the  termination of  this Agreement,  and (b)  to  the
extent  that such termination results from the  willful breach of a party hereto
of any of its  representations, warranties, covenants or  agreements made in  or
pursuant to this Agreement.
 
    8.3  FEES AND EXPENSES
 
    (a)  The  costs and  expenses that  have been  and will  be incurred  by the
Partnerships and the Company in connection with the preparation and  negotiation
of this Agreement, the making of the Offers and the solicitation of the approval
of  the limited partners of each of the Partnerships to the Merger, except those
costs and expenses identified below as "Individual Transaction Expenses" will be
shared by the Partnerships and the Company (the "Shared Transaction  Expenses").
The Shared Transaction Expenses include, without limitation, accounting fees and
expenses,  filing, printing  and mailing costs  of the Offer  Documents, the S-4
Registration Statement,  the  Proxy Statement/Prospectus  and  other  soliciting
materials, proxy solicitation fees, depositary fees and closing costs. Except as
otherwise  provided in this Section 8.3, the Shared Transaction Expenses will be
shared by the Company  and the Partnerships  as follows: (a)  50% of the  Shared
Transaction  Expenses will  be borne by  the Company  and (b) 50%  of the Shared
Transaction Expenses  will be  borne by  the Partnerships,  with the  amount  of
Shared  Transaction Expenses to be borne by  the Partnerships to be allocated to
each Partnership pro  rata based on  its relative Net  Asset Value.  "Individual
Transaction  Expenses" consist  of (i)  legal fees  and expenses;  (ii) fees and
expenses of investment bankers and other  financial advisors; (iii) the cost  of
the  Partnerships' real estate  portfolio appraisals and  (iv) the transfer fees
payable by the Company for the LP Units acquired through the Offers.  Individual
Transaction
 
                                      A-17
<PAGE>
Expenses  that  are  incurred by  the  Company  will be  borne  by  the Company.
Individual Transaction Expenses that  are incurred by  the Partnerships will  be
allocated  to each Partnership pro rata based on the relative Net Asset Value of
each Partnership.
 
    The Partnerships and  the Company  agree to  contribute their  share of  the
Shared  Transaction  Expenses  to  the  party  that  has  incurred  such  Shared
Transaction Expenses as they  are incurred if requested  by the Other Party.  In
the  event that the  amount of such  Shared Transaction Expenses  is not finally
determined prior to the Closing, the  parties hereto will agree on a  reasonable
estimate  of  the final  amount of  such Shared  Transaction Expenses,  and such
estimated amount, together with the amount of expenses already incurred, will be
the total Shared  Transaction Expenses.  The Company shall  pay to  each of  the
Partnerships,  or each  of the  Partnerships shall pay  to the  Company or shall
accrue to the extent not already accrued as of the Closing Date, as the case may
be, its allocated portion of Shared  Transaction Expenses that have not  already
been  paid, in full satisfaction  of its obligations under  this Section 8.3. No
adjustments will be made following the Closing if the total amount of the Shared
Transaction Expenses estimated  by the parties  hereto prior to  the Closing  is
different from the amount actually incurred.
 
    (b)  Except for IDS1,  as to whom  this Section 8.3(b)  is not applicable, a
Partnership  shall  pay  the  Company  a   pro  rata  portion  (based  on   such
Partnership's   relative  Net  Asset  Value,   taking  into  account  all  three
Partnerships) of  the Shared  Transaction  Expenses and  Individual  Transaction
Expenses that would otherwise be borne by the Company pursuant to Section 8.3(a)
hereof, upon the first to occur of any of the following events:
 
        (i)  the termination of this Agreement by the Company or the Partnership
    pursuant to Section 8.1(d)  hereof or the termination  of this Agreement  by
    the  Company pursuant to Section 8.1(f) hereof and, in either such case, the
    Partnership has furnished  information to,  or entered  into discussions  or
    negotiations  with,  any person  or entity  with  respect to  an Alternative
    Transaction and  the  General Partner  Recommendation  shall not  have  been
    reaffirmed  to the limited  partners of the  Partnership by the  date of the
    meeting of limited partners and remain effective on that date; or
 
        (ii) the  termination  of this  Agreement  by the  Company  pursuant  to
    Section 8.1(e)(i), (ii), or (iii) hereof; or
 
        (iii)  the  termination  of this  Agreement  by the  Partnership  or the
    Company pursuant to Section 8.1(g) hereof.
 
    (c) "Alternative Transaction"  means any (i)  transaction pursuant to  which
any  person or group of  persons other than the Company  or any affiliate of the
Company (a  "Third  Party") acquires  or  would acquire  more  than 25%  of  the
outstanding  LP  Units  of  the Partnership,  whether  from  the  Partnership or
pursuant to a tender offer or exchange offer or otherwise, (ii) merger or  other
business combination involving the Partnership pursuant to which any Third Party
acquires  more  than 25%  of  the LP  Units or  other  equity securities  of the
Partnership or  the entity  surviving such  merger or  business combination,  or
(iii)  any other transaction pursuant to which any Third Party acquires or would
acquire control of the assets of the Partnership having a fair market value  (as
determined  by the General  Partner of the  Partnership in good  faith) equal to
more than 25%  of the fair  market value of  all the assets  of the  Partnership
immediately prior to such transaction.
 
    (d)  In the event of the termination of this Agreement by the Company or the
Partnership pursuant  to Section  8.1(d) hereof  following the  vote of  limited
partners  of the Partnership and if  Section 8.3(b)(i) hereof is not applicable,
then the Partnership shall bear a percentage of the Shared Merger Expenses  that
the  Partnership would  otherwise have borne  pursuant to  Section 8.3(a) hereof
equal to the  percentage of outstanding  LP Units of  the Partnership that  were
voted  in  favor  of  the Merger.  Any  Shared  Merger Expenses  not  paid  by a
Partnership pursuant to  this paragraph shall  be paid by  the Company (and  not
paid by the other Partnerships).
 
                                      A-18
<PAGE>
    8.4  EXTENSION; WAIVER
 
    At  any time  prior to the  Closing, the  parties hereto may,  to the extent
legally allowed,  (a)  extend  the  time  for the  performance  of  any  of  the
obligations   or  other  acts  of  the  other  parties  hereto,  (b)  waive  any
inaccuracies in the representations and  warranties of the other parties  hereto
contained  herein or made in connection  herewith, and (c) waive compliance with
any of  the  agreements  of  the other  parties  hereto  contained  herein.  Any
agreement on the part of a party hereto to any such extension or waiver shall be
valid  only if set  forth in an instrument  in writing signed  on behalf of such
party.
 
    8.5  NO SURVIVAL OF REPRESENTATIONS AND WARRANTIES
 
    None of the representations and  warranties in this Agreement shall  survive
the Closing Date.
 
ARTICLE IX.  MISCELLANEOUS
 
    9.1  ASSIGNMENT OF CONTRACT
 
    The  Company  may not  assign its  rights under  this Agreement  without the
consent of the applicable Partnership. None of the Partnerships may assign their
rights under this Agreement.
 
    9.2  RISK OF LOSS
 
    (a) Risk of loss or damage to the Assets by condemnation, eminent domain  or
similar proceedings (or deed in lieu thereof), or by fire or any other casualty,
from  the date  hereof through  the Effective  Time will  be on  the Partnership
owning such Assets and thereafter will be on the Company.
 
    (b) In the event of  loss or damage to the  Assets that occurs prior to  the
Effective Time, if the Partnership elects not to or is unable to effect a timely
cure of such loss or damage prior to Closing, the monetary value of such loss or
damage  shall  be reflected  on  the Closing  Balance Sheet  and  if, as  of the
Effective Time,  the reduction  in  the Partnership's  Closing Net  Asset  Value
resulting  from such loss or damage is not offset by an increase in other Assets
of the Partnership (including  insurance proceeds payable  with respect to  such
loss  or  damage or  condemnation awards  received) to  the extent  necessary to
satisfy the condition to Closing set forth in Section 7.2(b) hereof, the Company
may, at its option, elect to terminate this Agreement as to such Partnership, or
the Company may elect  to extend the  term of this  Agreement and resolicit  the
limited partners of such Partnership with respect to participation in the Merger
with  the  Net Asset  Value of  the  Partnership suffering  such loss  or damage
adjusted to reflect such loss or damage.
 
    9.3  ENTIRE AGREEMENT; MODIFICATIONS
 
    This Agreement, together with the General Partner Undertaking, embodies  and
constitutes  the entire  understanding between the  parties with  respect to the
transactions contemplated herein, and  all prior or contemporaneous  agreements,
understandings, representations and statements, oral or written, are merged into
this  Agreement. Neither this Agreement, the General Partner Undertaking nor any
provision hereof  or thereof  may be  waived, modified,  amended, discharged  or
terminated  except by an instrument in writing signed by the party against which
the  enforcement  of   such  waiver,  modification,   amendment,  discharge   or
termination is sought, and then only to the extent set forth in such instrument.
 
    9.4  NOTICES
 
    All  notices, demands  or other  writings in  this Agreement  provided to be
given or made or sent, or  which may be given or  made or sent, by either  party
hereto  to the other may  be given personally or  may be delivered by depositing
the same in the U.S. mail, certified, return receipt requested, postage  prepaid
or  by delivering the same to an  air courier service, postage prepaid, properly
addressed and sent  to the address  of such party  as set forth  below, or  such
other address as either party may from
 
                                      A-19
<PAGE>
time  to time  designate by written  notice to  the other. Notice  given by mail
shall be considered effective  upon the expiration of  five business days  after
deposit.  Notice given in any  other manner shall be  effective only if and when
received by the addressee.
 
<TABLE>
<S>                                             <C>
To the Company:                                 Shurgard Storage Centers, Inc.
                                                Attn: Harrell Beck
                                                1201 Third Avenue, Suite 2200
                                                Seattle, Washington 98101
 
with a copy to:                                 Latham & Watkins
                                                Attn: Scott R. Haber
                                                505 Montgomery Street, 19th Floor
                                                San Francisco, California 94111
 
To the Partnerships:                            Shurgard Associates L.P.
                                                Shurgard Associates L.P. II
                                                Shurgard Associates L.P. III
                                                Attn: Charles K. Barbo
                                                1201 Third Avenue, Suite 2200
                                                Seattle, Washington 98101
 
with a copy to:                                 Perkins Coie
                                                Attn: Linda A. Schoemaker
                                                1201 Third Avenue, 40th Floor
                                                Seattle, Washington 98101-3099
</TABLE>
 
    9.5  INTERPRETATION
 
    Words of any gender used  in this Agreement shall  be held and construed  to
include  any  other gender,  and words  of a  singular number  shall be  held to
include the plural and vice versa, unless the context requires otherwise.
 
    9.6  CAPTIONS
 
    The captions used in this Agreement  are for convenience only and shall  not
be deemed to construe or to limit the meaning of the language of this Agreement.
 
    9.7  MULTIPLE COUNTERPARTS
 
    This  Agreement may be executed in  any number of identical counterparts. If
so executed, each  of such  counterparts is  to be  deemed an  original for  all
purposes, and all such counterparts shall collectively constitute one agreement,
but  in making proof of  this Agreement it shall not  be necessary to produce or
account for more than one such counterpart.
 
    9.8  BINDING EFFECT
 
    Subject to the restrictions on  assignment contained in Section 9.1  hereof,
this  Agreement shall be  binding upon and  inure to the  benefit of the parties
hereto  and  their  respective  heirs,  legal  representatives,  successors  and
assigns.
 
    9.9  ATTORNEYS' FEES
 
    Subject  to the requirements of Section 9.11 hereof, should any party hereto
employ an attorney or attorneys  to enforce any of  the provisions hereof or  to
protect  its interest in any manner arising  under this Agreement, or to recover
damages for the breach hereof, the nonprevailing party or parties in any  action
pursued in courts of competent jurisdiction (the finality of which action is not
legally  contested)  agrees  to  pay  to the  prevailing  party  or  parties all
reasonable costs, damages and expenses,  including attorneys' fees, expended  or
incurred  in connection therewith; provided, however, that if more than one item
is disputed and the final  decision is against each party  as to one or more  of
the  disputed  items, then  such costs,  expenses and  attorneys' fees  shall be
apportioned in accordance with the monetary values of the items decided  against
each party.
 
                                      A-20
<PAGE>
    9.10  NO WAIVER; SEVERABILITY
 
    The failure of any party hereto to enforce at any time any of the provisions
of  this Agreement  shall in  no way  be construed  to be  a waiver  of any such
provision, and shall in no way affect the validity of this Agreement or any part
hereof or the  right of  any party  thereafter to  enforce each  and every  such
provision.  No waiver  of any  breach of this  Agreement shall  be held  to be a
waiver of any other or subsequent breach. If any provision of this Agreement, or
the application thereof to any person or circumstances shall, for any reason and
to any extent, be invalid or unenforceable, but the extent of the invalidity  or
unenforceability  does not destroy the basis  of the bargain between the parties
as contained herein, the remainder of this Agreement and the application of such
provision to other persons  or circumstances shall not  be affected thereby  but
rather shall be enforced to the greatest extent permitted by law.
 
    9.11  NO JOINT AND SEVERAL LIABILITY
 
    If  one of the Partnerships  defaults under, or is in  breach of, any of its
representations, warranties  or  covenants  contained in  this  Agreement,  such
Partnership  shall be  accountable to  the Company and  shall be  liable for the
damages caused by  such default or  breach as provided  in this Agreement.  Each
Partnership  hereunder  has  undertaken  obligations  and  made representations,
warranties, disclosures and covenants herein and in and pursuant to the exhibits
hereto solely  with respect  to itself  and the  Property owned  by it.  Nothing
contained  herein, however, is intended to  make any of the Partnerships jointly
and severally liable for the default or breach by any of the other Partnerships,
and with  respect to  any  such default  and breach  such  shall be  solely  the
obligation  and responsibility of the Partnership responsible for the default or
breach.
 
    9.12  APPLICABLE LAW
 
    This Agreement shall  be governed by  and construed in  accordance with  the
laws of the state of Washington.
 
                                      A-21
<PAGE>
    IN  WITNESS WHEREOF, this Agreement has been executed by each of the parties
as of the date first set forth above.
 
                                          COMPANY:
 
                                          SHURGARD STORAGE CENTERS, INC.
 
                                          By /s/_HARRELL BECK___________________
                                             Harrell Beck, Chief Financial
                                             Officer
 
                                          PARTNERSHIPS:
 
                                          IDS/SHURGARD INCOME GROWTH PARTNERS
                                          L.P.
 
                                          By Shurgard Associates L.P.
                                          Its General Partner
 
                                          By /s/_CHARLES K. BARBO_______________
                                             Charles K. Barbo,
                                             General Partner
 
                                            /s/_ARTHUR W. BUERK_________________
                                            Arthur W. Buerk,
                                          General Partner
 
                                          Shurgard General Partner, Inc.
 
                                          By /s/_CHARLES K. BARBO_______________
                                             Charles K. Barbo, President
 
                                      A-22
<PAGE>
                                          IDS/SHURGARD INCOME GROWTH PARTNERS
                                          L.P. II
 
                                          By Shurgard Associates L.P. II
                                          Its General Partner
 
                                          By /s/_CHARLES K. BARBO_______________
                                             Charles K. Barbo,
                                             General Partner
 
                                            /s/_ARTHUR W. BUERK_________________
                                            Arthur W. Buerk,
                                            General Partner
 
                                          Shurgard General Partner, Inc.
 
                                          By /s/_CHARLES K. BARBO_______________
                                             Charles K. Barbo, President
 
                                          IDS/SHURGARD INCOME GROWTH PARTNERS
                                          L.P. III
 
                                          By Shurgard Associates L.P. III
                                          Its General Partner
 
                                          By /s/_CHARLES K. BARBO_______________
                                             Charles K. Barbo,
                                             General Partner
 
                                            /s/_ARTHUR W. BUERK_________________
                                            Arthur W. Buerk,
                                            General Partner
 
                                          Shurgard General Partner, Inc.
 
                                          By /s/_CHARLES K. BARBO_______________
                                             Charles K. Barbo, President
 
                                      A-23
<PAGE>
                       EXHIBIT A TO ACQUISITION AGREEMENT
                          GENERAL PARTNER UNDERTAKING
 
    This GENERAL PARTNER UNDERTAKING  (this "Agreement") is  entered into as  of
July  1,  1996  by Shurgard  Associates  L.P.  ("GP1"), the  general  partner of
IDS/Shurgard Income Growth Partners L.P.  ("IDS1"), Shurgard Associates L.P.  II
("GP2"),  the general  partner of  IDS/Shurgard Income  Growth Partners  L.P. II
("IDS2"), and  Shurgard Associates  L.P.  III ("GP3"),  the general  partner  of
IDS/Shurgard  Income  Growth Partners  L.P. III  ("IDS3"), and  Shurgard Storage
Centers, Inc., a  Delaware corporation  (the "Company").  GP1, GP2  and GP3  are
individually  referred to herein as a  "General Partner" and collectively as the
"General Partners." IDS1, IDS2 and IDS3 are individually referred to herein as a
"Partnership" and collectively as the "Partnerships."
 
                                    RECITALS
 
    A.  Concurrently with the execution of this Agreement, the Partnerships  and
the Company are entering into an Acquisition Agreement, dated as of July 1, 1996
(the "Acquisition Agreement"), pursuant to which (i) the Company will commence a
tender offer to purchase up to a specified percentage of the limited partnership
units  of each of the Partnerships (each,  an "Offer" and together the "Offers")
and (ii)  the  Partnerships  will merge  with  and  into the  Company  upon  the
satisfaction  or waiver of the conditions  to closing contained therein (each, a
"Merger" and together, the "Mergers").
 
    B.  The General  Partners believe that  it is in the  best interests of  the
Partnerships  and their limited partners for  the Partnerships to enter into and
consummate  the  Acquisition  Agreement  and  the  General  Partners  intend  to
recommend  to  the  limited partners  of  the  Partnerships that  they  vote for
approval of the Acquisition Agreement.
 
    C.   Capitalized terms  used but  not  defined in  this Agreement  have  the
meanings assigned to such terms in the Acquisition Agreement.
 
                                   AGREEMENTS
 
    NOW,  THEREFORE, in consideration of the mutual representations, warranties,
covenants and agreements set forth herein, the parties hereto agree as follows:
 
ARTICLE I.  THE OFFERS
 
    1.1  CONSENT TO OFFERS
 
    The General Partners hereby consent to the making of the Offers.
 
    1.2  GENERAL PARTNER FAIRNESS DETERMINATION AND RECOMMENDATION
 
    With respect to each Offer, the  Offer Documents and the Schedules 14D-9  or
the  Schedules 13E-3 shall contain, to  the extent applicable, (a) the statement
by the General Partner that the terms of  the Offers and the Merger are fair  to
limited  partners and (b) the recommendation by the General Partner that holders
of LP Units who desire immediate liquidity tender their LP Units pursuant to the
Offer and  that  all  other holders  of  LP  Units retain  their  LP  Units  and
participate in the Merger.
 
    1.3  ADMISSION OF COMPANY AS SUBSTITUTE LIMITED PARTNER
 
    Each  of the General  Partners agrees to  take such actions  as are required
under the  applicable  Partnership Agreement  to  effect the  admission  of  the
Company  as a limited  partner of the  Partnership with respect  to all LP Units
acquired by  it pursuant  to  the Offer  in accordance  with  the terms  of  the
Partnership Agreement.
 
ARTICLE II.  THE MERGERS
 
    2.1  MEETINGS OF LIMITED PARTNERS; RECOMMENDATION OF GENERAL PARTNERS
 
    Each  General  Partner will  take all  action  necessary in  accordance with
applicable law and its Partnership's Partnership Agreement to convene a  meeting
of its limited partners as promptly as
 
                                     A(A-1)
<PAGE>
practicable  to consider and vote upon approval of the Acquisition Agreement and
consummation of the transactions contemplated thereby. Except as may be required
for the discharge of their fiduciary duties or as otherwise required by law, (a)
the General Partner shall recommend that  the limited partners vote in favor  of
approval  of  the Acquisition  Agreement  and consummation  of  the transactions
contemplated thereby and shall solicit the vote of the limited partners of  such
Partnership  in favor of  such approval and  take all other  action necessary or
advisable to secure the vote of such limited partners in favor of such  approval
and  (b)  IDS  Partnership Services  Corporation  ("IPSC") will  consent  to the
transactions contemplated by the Acquisition Agreement.
 
    2.2  WITHDRAWAL OF RECOMMENDATION IF REIT SHARE PRICE IS LESS THAN $21.50
 
    It is understood that the General  Partner of each Partnership may elect  to
withdraw  or change  its recommendation that  limited partners vote  in favor of
this Agreement if  the REIT Share  Price calculated without  regard to the  REIT
Share  Price Range in  respect of the  meeting (the "Meeting")  at which limited
partners are expected to vote on the Merger is less than $21.50. Before it  does
so,  however, the  General Partner  shall notify  the Company  of its  intent to
withdraw its recommendation not  later than the end  of the second business  day
following  the day the REIT  Share Price is determined,  and the General Partner
shall postpone or adjourn the meeting for such period or periods of time, not to
exceed ten business  days, as the  Company may reasonably  request. The  General
Partner  shall not withdraw its recommendation if  the Company agrees to pay the
Additional Consideration at least  two business days prior  to the date of  such
postponed or adjourned meeting.
 
ARTICLE III.  OTHER AGREEMENTS
 
    3.1  STANDSTILL
 
    The Company agrees that if it is admitted as a substitute limited partner in
a  Partnership and except  as otherwise contemplated by  this Agreement, it will
not, directly or indirectly, without the prior written consent of a majority  of
the  general partners of the General Partner of that Partnership (a) acquire any
additional LP  Units  of that  Partnership,  (b)  propose any  merger  or  other
business  combination  involving  that  Partnership, or  (c)  propose  any other
transaction pursuant to which it would control  or acquire any of the assets  of
that Partnership.
 
    3.2  EXCLUSIVITY
 
    Until  the termination  of the Acquisition  Agreement or the  Closing of the
Merger, no General Partner will, nor will it permit its partners (including  any
general or limited partner), agents or other representatives (including, without
limitation,  any investment banker,  attorney or accountant  retained by it) to,
directly or indirectly, initiate, solicit or encourage or, except as required by
law, including fiduciary  duties required by  law as determined  by the  General
Partner in good faith, engage in discussions or negotiations with or provide any
information  to any entity or  group (other than the  Company or an affiliate of
the Company) concerning any acquisition proposal, tender offer, exchange  offer,
merger,  consolidation,  sale of  a  substantial amount  of  assets, or  sale of
securities or equity interests, or in connection with a liquidation, dissolution
or similar transaction  involving such  Partnership. Each  General Partner  will
notify  the Company immediately if any  such inquiries or proposals are received
by, any  such  information  is  requested from,  or  any  such  negotiations  or
discussions  are sought to be initiated  or continued with, the Partnership, and
will keep the Company informed of the status and terms of any such proposals and
any such negotiations or discussions.
 
    3.3  INDEMNIFICATION
 
    From and  after the  Effective Time,  the Company  will indemnify  and  hold
harmless the General Partner of each of the Partnerships, that shall have merged
with  and into  the Company  pursuant to  a Merger  and its  general and limited
partners to the same extent that such persons are entitled to be indemnified  by
the Partnership under its Partnership Agreement.
 
                                     A(A-2)
<PAGE>
ARTICLE IV.  MISCELLANEOUS
 
    4.1  NOTICES
 
    All  notices, demands  or other  writings in  this Agreement  provided to be
given or made or sent, or  which may be given or  made or sent, by either  party
hereto  to the other may  be given personally or  may be delivered by depositing
the same in the U.S. mail, certified, return receipt requested, postage  prepaid
or  by delivering the same to an  air courier service, postage prepaid, properly
addressed and sent  to the address  of such party  as set forth  below, or  such
other  address as either party may from time to time designate by written notice
to the  other. Notice  given by  mail  shall be  considered effective  upon  the
expiration of five business days after deposit. Notice given in any other manner
shall be effective only if and when received by the addressee.
 
<TABLE>
<S>                                             <C>
To the Company:                                 Shurgard Storage Centers, Inc.
                                                Attn: Harrell Beck
                                                1201 Third Avenue, Suite 2200
                                                Seattle, Washington 98101
 
with a copy to:                                 Latham & Watkins
                                                Attn: Scott R. Haber
                                                505 Montgomery Street, 19th Floor
                                                San Francisco, California 94111
 
To the General Partners:                        Shurgard Associates L.P.
                                                Shurgard Associates L.P. II
                                                Shurgard Associates L.P. III
                                                Attn: Charles K. Barbo
                                                1201 Third Avenue, Suite 2200
                                                Seattle, Washington 98101
 
with a copy to:                                 Perkins Coie
                                                Attn: Linda A. Schoemaker
                                                1201 Third Avenue, 40th Floor
                                                Seattle, Washington 98101-3099
</TABLE>
 
    4.2  INTERPRETATION
 
    Words  of any gender used  in this Agreement shall  be held and construed to
include any  other gender,  and words  of a  singular number  shall be  held  to
include the plural and vice versa, unless the context requires otherwise.
 
    4.3  CAPTIONS
 
    The  captions used in this Agreement are  for convenience only and shall not
be deemed to construe or to limit the meaning of the language of this Agreement.
 
    4.4  MULTIPLE COUNTERPARTS
 
    This Agreement may be executed in  any number of identical counterparts.  If
so  executed, each  of such  counterparts is  to be  deemed an  original for all
purposes, and all such counterparts shall collectively constitute one agreement,
but in making proof of  this Agreement it shall not  be necessary to produce  or
account for more than one such counterpart.
 
    4.5  APPLICABLE LAW
 
    This  Agreement shall  be governed by  and construed in  accordance with the
laws of the state of Washington.
 
                                     A(A-3)
<PAGE>
    IN WITNESS WHEREOF, this Agreement has been executed by each of the  parties
as of the date first set forth above.
 
                                          COMPANY:
 
                                          SHURGARD STORAGE CENTERS, INC.
 
                                          By /s/_HARRELL BECK___________________
                                             Harrell Beck, Chief Financial
                                             Officer
 
                                          GENERAL PARTNERS:
 
                                          Shurgard Associates L.P.
 
                                          By /s/_CHARLES K. BARBO_______________
                                             Charles K. Barbo,
                                             General Partner
 
                                            /s/_ARTHUR W. BUERK_________________
                                            Arthur W. Buerk,
                                          General Partner
 
                                          Shurgard General Partner, Inc.
 
                                          By /s/_CHARLES K. BARBO_______________
                                             Charles K. Barbo, President
 
                                     A(A-4)
<PAGE>
                                          Shurgard Associates L.P. II
 
                                          By /s/_CHARLES K. BARBO_______________
                                             Charles K. Barbo,
                                             General Partner
 
                                            /s/_ARTHUR W. BUERK_________________
                                            Arthur W. Buerk,
                                            General Partner
 
                                          Shurgard General Partner, Inc.
 
                                          By /s/_CHARLES K. BARBO_______________
                                             Charles K. Barbo, President
 
                                          Shurgard Associates L.P. III
 
                                          By /s/_CHARLES K. BARBO_______________
                                             Charles K. Barbo,
                                             General Partner
 
                                            /s/_ARTHUR W. BUERK_________________
                                            Arthur W. Buerk,
                                            General Partner
 
                                          Shurgard General Partner, Inc.
 
                                          By /s/_CHARLES K. BARBO_______________
                                             Charles K. Barbo, President
 
                                     A(A-5)
<PAGE>
                                                                      APPENDIX B
 
                       SUMMARY PORTFOLIO APPRAISAL REPORT
 
                    IDS/SHURGARD INCOME GROWTH PARTNERS L.P.
 
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. II
 
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. III
 
                                      B-1
<PAGE>
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                                                              PAGE
                                                                                                            ---------
<S>                                                                                                         <C>
Letter of Transmittal.....................................................................................        B-3
Identification of Subject Portfolios......................................................................        B-5
Property Ownership and History............................................................................        B-5
Purpose of Appraisals.....................................................................................        B-5
Function of Appraisals....................................................................................        B-5
Scope of Appraisals.......................................................................................        B-5
Date of Valuation.........................................................................................        B-6
Value Definition..........................................................................................        B-6
Valuation Methodology.....................................................................................        B-7
  Site Inspections and Data Gathering.....................................................................        B-8
  Income and Expense Analysis.............................................................................        B-8
  Income Approach Analysis................................................................................        B-9
  Sales Comparison Analysis...............................................................................       B-10
  Sales Comparison Approach and Income Approach Reconciliation............................................       B-10
Portfolio Value Conclusions...............................................................................       B-11
Portfolio Summary--IDS/Shurgard Income Growth Partners L.P................................................       B-12
Portfolio Summary--IDS/Shurgard Income Growth Partners L.P. II............................................       B-13
Portfolio Summary--IDS/Shurgard Income Growth Partners L.P. III...........................................       B-14
Assumptions and Limiting Conditions.......................................................................       B-16
</TABLE>
 
                                      B-2
<PAGE>
- --------------------------------------------------------------------------------
                                                               1129 Broad Street
                                                       Shrewsbury, NJ 07702-4314
ROBERT A. STANGER & CO., INC.
                                                                  (908) 389-3600
                                                             FAX: (908) 389-1751
 FINANCIAL AND MANAGEMENT CONSULTANTS
                                                                  (908) 544-0779
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                                 June 26, 1996
 
IDS/Shurgard Income Growth Partners L.P.
IDS/Shurgard Income Growth Partners L.P. II
IDS/Shurgard Income Growth Partners L.P. III
1201 Third Avenue, Suite 2200
Seattle, Washington 98101
 
Gentlemen:
 
    IDS/Shurgard   Income  Growth  Partners  L.P.,  IDS/Shurgard  Income  Growth
Partners L.P.  II,  and  IDS/Shurgard  Income  Growth  Partners  L.P.  III  (the
"Partnerships")  have  engaged  Robert A.  Stanger  & Co.,  Inc.  ("Stanger") to
estimate the  market value  of the  portfolios of  self-storage facilities  (the
"Portfolios")  owned by each Partnership.  Such appraisals reflect the estimated
market value  of the  fee simple  interests or,  where appropriate,  leased  fee
interests  in each Portfolio as of December 31, 1995, assuming each Portfolio to
be free and  clear of any  existing debt or  other encumbrances (the  "Portfolio
Valuations").
 
    This  summary  appraisal report  is prepared  in accordance  with agreements
between Robert A. Stanger & Co., Inc.  and each of the Partnerships dated  March
8,  1996. In accordance with the agreements, Stanger has been engaged to perform
the appraisals  on  a limited  scope  basis  in conformity  with  the  departure
provisions  of the Uniform Standards of  Professional Appraisal Practice and the
standards of the Appraisal Institute as  they relate to limited scope  appraisal
reports.  We have relied upon the  Income Approach and Sales Comparison Approach
to value  and  have  been engaged  to  deliver  to the  Partnerships  a  summary
appraisal  report that is not  designed to meet the  requirements of Title XI of
the Financial  Institutions  Reform,  Recovery,  and  Enforcement  Act  of  1989
("FIRREA").
 
    Each Portfolio Valuation is based in part upon information supplied to us by
the  Partnerships  and  the property  manager,  including, but  not  limited to:
descriptions of the subject properties  (the "Properties"), unit mix,  operating
statements  of the  Properties, property  tax bills,  expense details, occupancy
reports, rent rolls and other supporting data. We have also received information
from interviews of property and Partnership management personnel. We have relied
upon such information and have assumed that the information provided is accurate
and complete. We have not attempted to independently verify such information.
 
    We are advised by the Partnerships that the purpose of the appraisals is  to
estimate  the  value  of  the  fee  interests  in  each  Portfolio  under market
conditions as of the appraisal date,  and that the Portfolio Valuations will  be
used solely in connection with a proposed tender offer for Partnership interests
and  merger of  each Partnership with  Shurgard Storage  Centers, Inc. ("SSCI").
Stanger understands that the Portfolio Valuations will be reviewed and  utilized
by  the  Partnerships in  connection with  the  above transactions,  and Stanger
agrees to the use of  the Portfolio Valuations for  this purpose subject to  the
terms and conditions of the agreements related thereto. For these purposes, this
summary  appraisal report was  prepared stating our opinion  as to the aggregate
fair market value of each  Partnership's interests in the respective  Portfolios
as of December 31, 1995. Portions of this
 
                                      B-3
<PAGE>
report  may be summarized and referenced in  a proxy statement or other offering
materials relating  to the  transactions, subject  to prior  review by  Stanger.
However,  the  attached  summary  appraisal report  should  be  reviewed  in its
entirety and is  subject to  the assumptions and  limiting conditions  contained
herein.  Background information  and analysis  upon which  value conclusions are
based has been retained in our files.
 
    Our review was undertaken solely for the purpose of providing an opinion  of
market  value, and we make  no representation as to  the adequacy of such review
for any other purpose. Our opinion is expressed with respect to the total market
value of each of  the Portfolios. Neither Stanger  nor the undersigned have  any
present   or  contemplated  future  financial   or  ownership  interest  in  the
Properties, the Partnerships or SSCI.
 
    The Portfolio Valuations  have been  prepared on  a limited  scope basis  in
conformity   with  the  departure   provisions  of  the   Uniform  Standards  of
Professional Appraisal Practice of the  Appraisal Institute, in accordance  with
agreements  between Robert  A. Stanger  & Co.,  Inc. and  the Partnerships dated
March 8, 1996. Pursuant to those agreements, Stanger has relied upon the  Income
Approach  and Sales  Comparison Approach  to value and  did not  employ the Cost
Approach.
 
    The appraisals are only an  estimate of the market  value of the fee  simple
interests  or, where appropriate, leasehold interests  in each of the Portfolios
as of  the  date of  valuation  and  should not  be  relied upon  as  being  the
equivalent  of the price  that would necessarily  be received in  the event of a
sale or  other disposition  of the  Portfolios. Changes  in corporate  financing
rates  or changes in real estate property  markets may result in higher or lower
values of real property. The use of other valuation methodologies might  produce
a  higher or lower value. Our opinion is subject to the assumptions and limiting
conditions set  forth  herein.  We  have used  methods  and  assumptions  deemed
appropriate in our professional judgment; however, future events may demonstrate
that  the  assumptions  were  incorrect  or  that  other,  different  methods or
assumptions may have been more appropriate.
 
    This summary appraisal report provides our value conclusion with respect  to
the  Portfolios, definitions of value,  discussions of the valuation methodology
employed, assumptions, and  limiting conditions.  The attached  exhibits are  an
integral part of this report.
 
    Based  upon the review described  herein, it is our  opinion that the market
value of  the  fee  simple  interests or,  where  appropriate,  the  leased  fee
interests in each Portfolio as of December 31, 1995 is as follows:
 
<TABLE>
<S>                                                                           <C>
IDS/Shurgard Income Growth Partners L.P.
 Forty Million, Three Hundred and Seventy Thousand Dollars ($40,370,000)
IDS/Shurgard Income Growth Partners L.P. II
 Thirty Million, Five Hundred and Twenty Thousand Dollars ($30,520,000)
IDS/Shurgard Income Growth Partners L.P. III
 Fifty Million, Eight Hundred and Ninety Thousand Dollars ($50,890,000)
</TABLE>
 
                                          Sincerely,
 
                                          Robert A. Stanger & Co., Inc.
                                          Shrewsbury, New Jersey
 
                                      B-4
<PAGE>
                      IDENTIFICATION OF SUBJECT PORTFOLIOS
 
    The  subjects of  this summary appraisal  report are the  portfolios of real
properties (the "Portfolios") in which IDS/Shurgard Income Growth Partners L.P.,
IDS/Shurgard Income  Growth Partners  L.P. II,  and IDS/Shurgard  Income  Growth
Partners L.P. III own interests.
 
    The  Portfolio of IDS/Shurgard  Income Growth Partners  L.P. is comprised of
twelve self-storage properties,  aggregating approximately  684,000 square  feet
(as adjusted for certain joint venture interests), located in six states.
 
    The Portfolio of IDS/Shurgard Income Growth Partners L.P. II is comprised of
eight  self-storage properties,  aggregating approximately  534,000 square feet,
located in five states.
 
    The Portfolio of IDS/Shurgard Income  Growth Partners L.P. III is  comprised
of   sixteen  self-storage  properties  and   one  office  property  aggregating
approximately 1,004,000  square  feet,  located  in  seven  states.  (A  summary
description of each Portfolio is provided elsewhere in this report.)
 
                         PROPERTY OWNERSHIP AND HISTORY
 
    All the properties in the IDS/Shurgard Income Growth Partners L.P. Portfolio
are  owned by IDS/ Shurgard  Income Growth Partners L.P.,  with the exception of
four properties located  in Michigan (the  "JV Properties") which  are owned  by
Shurgard Joint Partners II, a joint venture in which IDS/ Shurgard Income Growth
Partners  L.P. owns a 70% interest. The IDS/Shurgard Income Growth Partners L.P.
Properties were purchased by  the Partnership and/or  the Joint Venture  between
1988 and 1990.
 
    All  the  properties  in the  IDS/Shurgard  Income Growth  Partners  L.P. II
Portfolio are owned  by IDS/Shurgard  Income Growth  Partners L.P.  II and  were
purchased by the Partnership between 1988 and 1991.
 
    All  the  properties in  the IDS/Shurgard  Income  Growth Partners  L.P. III
Portfolio are owned  by IDS/Shurgard Income  Growth Partners L.P.  III and  were
purchased  by  the Partnership  between  1991 and  1994.  Information concerning
properties purchased within the past three years has been reviewed and  retained
in our files.
 
                             PURPOSE OF APPRAISALS
 
    The  purpose of the  appraisals is to  estimate the market  value of the fee
simple interests or, where appropriate,  leased fee interests in the  Portfolios
under market conditions as of December 31, 1995.
 
                             FUNCTION OF APPRAISALS
 
    The  function of the appraisals  is to provide a  current estimate of market
value of the fee simple interests or, where appropriate, leased fee interests in
the Portfolios for use solely by the Partnerships in connection with a  proposed
tender  offer for interests  in the Partnerships and  merger of the Partnerships
with Shurgard Storage Centers, Inc. No representation is made as to the adequacy
of this appraisal for any other purpose.
 
                              SCOPE OF APPRAISALS
 
    The Portfolio Valuations  have been  prepared on  a limited  scope basis  in
conformity   with  the  departure   provisions  of  the   Uniform  Standards  of
Professional Appraisal Practice of the  Appraisal Institute, in accordance  with
agreements  between Robert  A. Stanger  & Co.,  Inc. and  the Partnerships dated
March 8, 1996. Pursuant to those agreements, Stanger has relied upon the  Income
Approach  and Sales  Comparison Approach  to value and  did not  employ the Cost
Approach (as described below).
 
    In estimating the value of  a property, appraisers typically consider  three
approaches  to value: the  Cost Approach, the Sales  Comparison Approach and the
Income Approach. The type and age of a
 
                                      B-5
<PAGE>
property, market conditions  and the  quantity and  quality of  data affect  the
applicability  of each  approach in  a specific  appraisal situation.  The value
estimated by the Cost Approach incorporates  separate estimates of the value  of
the  unimproved  site  under its  highest  and best  use  and the  value  of the
improvements, less observed  accrued depreciation resulting  from physical  wear
and  tear and functional and/or economic  obsolescence. The Market Data or Sales
Comparison Approach involves a comparative analysis of the subject property with
other similar properties that have sold  recently or that are currently  offered
for sale in the market. The Income Approach involves an economic analysis of the
property based on its potential to provide future net annual income.
 
    Pursuant  to  the terms  of our  engagement,  the Portfolio  Valuations were
performed using  the Income  Approach  and Sales  Comparison Approach.  Since  a
primary  buyer group for the type of property appraised herein is investors, the
Income Approach and Sales Comparison Approach were deemed appropriate  valuation
methodologies. Further, given the primary criteria used by buyers of the type of
property  appraised herein, the Cost Approach  was considered less reliable than
either of the Income Approach or Sales Comparison Approach.
 
    Changes in corporate financing  rates generally or  in real estate  property
markets  may result in higher or lower values of real property. The use of other
valuation methodologies might produce  a higher or lower  value. Our opinion  is
subject to the assumptions and limiting conditions set forth herein.
 
    Departures  -- Uniform Standards of Professional Practice -- With respect to
the limited appraisals,  the departure  provisions of the  Uniform Standards  of
Professional  Appraisal Practice permit departures  from the specific guidelines
of Standard 1. In this report the following departures were taken:
 
<TABLE>
<C>                    <S>
 Standard Rule 1-4 (b) Details relating to comparable sales and rental data and
                       reconciliations of value for each property are not
                       specifically described or set forth in this report but have
                       been retained in our files.
</TABLE>
 
                               DATE OF VALUATION
 
    The date of valuation for the Portfolios is December 31, 1995.
 
                                VALUE DEFINITION
 
    Market value, as used in this report and defined by the Appraisal Institute,
is the most probable price as of a specified date, in cash, in terms  equivalent
to  cash, or in other precisely revealed terms, for which the specified property
rights should sell after reasonable exposure  in a competitive market under  all
conditions  requisite to  a fair  sale, with  the buyer  and seller  each acting
prudently, knowledgeably and  for self-interest,  and assuming  that neither  is
under undue duress.
 
    Implicit  in this definition is the consummation of a sale as of a specified
date and the passing of title from seller to buyer under conditions whereby:
 
    (a) buyer and seller are typically motivated;
 
    (b) both parties  are well  informed or  well advised,  and each  acts in  a
       manner he considers in his own best interest;
 
    (c) a reasonable time is allowed for exposure in the open market;
 
    (d)  payment  is made  in  terms of  cash  in U.S.  dollars  or in  terms of
       financial arrangements comparable thereto; and
 
    (e) the  price represents  the normal  consideration for  the property  sold
       unaffected  by special or creative financing or sales concessions granted
       by anyone associated with the sale.
 
(Source: THE APPRAISAL OF REAL ESTATE, Tenth Edition.)
 
                                      B-6
<PAGE>
    The property rights appraised in this report consist of fee simple interests
or, where appropriate, leased  fee interests. Due  to the generally  short-term,
month  to month tenancies in self-storage  facilities, a fee simple interest was
deemed appropriate  for  such facilities.  Fee  simple interest  is  defined  as
absolute  ownership unencumbered by any other interest or estate subject only to
the limitations of eminent domain, escheat, police power and taxation.
 
    Leased fee interest is defined as  an ownership interest held by a  landlord
with  the right to  use and occupancy  conveyed by lease  to others, and usually
consists of the  right to  receive rent  and the  right to  repossession at  the
termination of the lease.
 
    In  the case  of the  JV Properties, the  property rights  appraised are fee
simple interests and the values reported  herein reflect a pro-rata interest  of
IDS/Shurgard  Income Growth Partners L.P. in  such fee simple value based solely
on its 70% interest in the joint venture.
 
    The appraisals include the value of land, land improvements such as  paving,
fencing,  on-site sewer and  water lines, and  the buildings as  of December 31,
1995. The appraisals do  not include supplies,  materials on hand,  inventories,
furniture,  equipment or other personal property, company records, or current or
intangible  assets  that  may  exist.  The  appraisals  pertain  only  to  items
considered as real estate.
 
                             VALUATION METHODOLOGY
 
    Pursuant to the terms of this engagement, Stanger has estimated the value of
the fee simple interests or, where appropriate, the leased fee interests in each
Portfolio's  Properties  based  on  the  Income  Approach  and  Sales Comparison
Approach to  valuation. (Appraisers  typically  use up  to three  approaches  in
valuing  real property:  the Cost Approach,  the Income Approach,  and the Sales
Comparison Approach. The type and age  of a property, market conditions and  the
quantity  and quality  of data  affect the applicability  of each  approach in a
specific appraisal situation.)
 
    The Income Approach is based on the assumption that the value of a  property
or  portfolio  of properties  is dependent  upon  the property's  or portfolio's
ability to produce income. The  Income Approach estimates a property's  capacity
to  produce income through an analysis  of the rental market, operating expenses
and net operating income.  Net income may then  be processed into value  through
either  (or a combination  of) two methods:  direct capitalization or discounted
cash flow  analysis.  In these  Portfolio  Valuations, a  direct  capitalization
analysis  and a discounted cash flow ("DCF")  analysis are used to determine the
value of the fee simple interests or, where appropriate, leased fee interests in
each Portfolio Property. The indicated  value by the Income Approach  represents
the  amount an investor  may pay for  the expectation of  receiving the net cash
flow from the Portfolio  Properties and proceeds from  the ultimate sale of  the
Portfolio Properties.
 
    The direct capitalization analysis is based upon the estimated net operating
income  of each Portfolio Property  capitalized at an appropriate capitalization
rate based upon  property characteristics  and competitive  position and  market
conditions as of the date of the appraisal.
 
    In  applying  the DCF  analysis, Stanger  utilized  pro forma  statements of
operations for each Portfolio Property including revenues and expenses projected
over a ten-year period. Each Portfolio Property is assumed to be sold at the end
of the ten-year holding period. The  reversion value of each Portfolio  Property
which  can be realized  upon sale at the  end of the  ten-year holding period is
estimated based on capitalization of the estimated net income of the property in
the year of sale, utilizing a capitalization rate deemed appropriate in light of
the age,  anticipated  functional  and  economic  obsolescence  and  competitive
position  of  the property  at  the time  of sale.  Net  proceeds to  owners are
determined by deducting appropriate  costs of sale.  The discount rate  selected
for  the DCF analysis is based upon  estimated target rates of return for buyers
of self-storage properties. Total estimated  value for the Portfolio  Properties
is  arrived at by summing  the discounted present value  of the cash flow stream
from operations and net proceeds from sale for each property.
 
                                      B-7
<PAGE>
    The Sales Comparison Approach utilizes indices of value derived from  actual
or  proposed  sales  of  comparable  properties to  estimate  the  value  of the
Portfolio Property. Price  per square  foot --  a unit  of comparison  typically
analyzed  for  self-storage facilities  -- was  utilized  in applying  the Sales
Comparison Approach to the Portfolio Properties.
 
    The following  describes more  fully  the steps  involved in  the  valuation
methodology utilized.
 
SITE INSPECTIONS AND DATA GATHERING
 
    In conducting the Portfolio Valuations, representatives of Stanger performed
a site inspection of each Portfolio Property during March 1996. In the course of
these  site visits,  the physical  facilities of  each property  were inspected,
current rental and occupancy information for the property was obtained,  current
market   rental  rates  for  competing  properties  were  investigated,  primary
competing properties were visited, information on the local market was gathered,
and the  on-site manager  or assistant  manager was  interviewed concerning  the
property  and other factors. Information gathered during the site inspection was
supplemented  by  a  review   of  published  information  concerning   economic,
demographic and real estate trends in local or regional and national markets.
 
    In  conducting  the appraisals,  Stanger  also interviewed  and  relied upon
Partnership and property management personnel to obtain information relating  to
the  condition  of each  property, including  any deferred  maintenance, capital
budgets, known environmental  conditions, status  of on-going  or newly  planned
property  additions, reconfigurations, improvements, and other factors affecting
the physical condition of the property improvements.
 
    In addition, Stanger  interviewed district and/or  regional managers of  the
Portfolio  Properties,  SSCI  management  personnel  and  Partnership management
personnel. Such  interviews included  discussions of  competitive conditions  in
local  markets,  area  economic  and development  trends  affecting  the subject
properties,  historical  and  budgeted  operating  revenues  and  expenses   and
occupancies.  Stanger  also reviewed  historical  operating statements  and 1996
operating budgets for  each Portfolio  Property, and reviewed  surveys of  local
self-storage markets conducted by property management personnel.
 
    To  define the occupancy, rental  rate and expense escalators  to be used in
developing operating projections, Stanger reviewed the acquisition criteria  and
projection parameters in use in the marketplace by major self-storage investors,
owners  and operators. In addition, Stanger reviewed other published information
concerning acquisition criteria in  use by property investors  at or around  the
valuation date. Further, Stanger interviewed various sources in local markets to
identify recent sales of self-storage properties and to derive certain valuation
indicators.  Sources for  transaction data  included local  appraisers, property
owners, real estate brokers, tax assessors, and real estate research firms.
 
    In addition, Stanger reviewed the  acquisition criteria and parameters  used
by  self-storage real  estate investors. Such  review included a  search of real
estate data sources  and publications concerning  real estate buyer's  criteria,
and   direct  telephonic  interviews  with  major  national  investors,  owners,
managers,  brokers  and  appraisers  of  self-storage  property  portfolios   to
investigate the interaction of such factors as required rates of return, initial
capitalization rate requirements, and property type or geographical preferences.
 
    Stanger  also compiled  data on  actual transactions  involving self-storage
properties from  which  acquisition  criteria  and  parameters  were  extracted.
Stanger  reviewed publicly available information on acquisitions of self-storage
properties by certain publicly owned real estate companies and contacted various
industry sources for relevant data.
 
INCOME AND EXPENSE ANALYSIS
 
    During the  course  of  the  site  inspections,  competing  properties  were
identified  and data on  local market rental rates  and occupancy were obtained.
Such data  was compared  to national  averages for  self-storage properties  and
posted  rental  rates, the  rent  roll and  occupancy  reports for  each subject
 
                                      B-8
<PAGE>
property, as  available.  Historical and  budgeted  effective gross  income  and
income  from ancillary sources  was also reviewed for  each subject property. In
addition, discussions  were conducted  with  relevant Partnership  and  property
management  personnel  concerning  property and  market  trends  and competitive
conditions. After  assessing  the  above  factors,  an  effective  gross  income
estimate  was  prepared for  each property  based  upon the  unit configuration,
market rental rates, market occupancy rate and estimates of ancillary income.
 
    Historical and budgeted data on expenses were obtained from each Partnership
for each  property.  In addition,  property  tax  bills were  obtained  and  tax
assessments   were  confirmed  with  local  municipalities.  Expenses  for  each
individual property were  estimated based on  historical and budgeted  operating
expenses, discussions with management and certain industry expense guidelines.
 
    Estimated  expenses  were  then  deducted  from  estimated  income  for each
property to arrive at each properties' estimated net operating income.  Expenses
relating solely to investor reporting and accounting were excluded.
 
    During  the course  of the  site inspections,  any deferred  maintenance was
observed.  Historical  and  budgeted  capital  expenditures  were  reviewed  and
discussed  with management, and appropriate capital expenditures were considered
in the analysis.
 
INCOME APPROACH ANALYSIS
 
    Stanger then employed  both direct capitalization  and discounted cash  flow
analysis   to  estimate  the  value  of   the  subject  properties.  The  direct
capitalization rate  used  was  based  on  current  acquisition  criteria  among
self-storage  investors  and  reflected in  specific  sales  transactions. Where
appropriate, the  capitalization  rate  used  for  an  individual  property  was
adjusted  to reflect valuation  factors unique to the  property, such as overall
quality, recent  buildouts,  and  other unique  valuation  facts  affecting  the
individual  properties.  Where  deferred  maintenance  or  extraordinary capital
expenditures were required the capitalized value was adjusted accordingly.
 
        - DIRECT CAPITALIZATION ANALYSIS -- Based upon the net  operating
          income  estimated in accordance with  the analyses of effective
          gross income and expenses described above, an estimate of value
          was derived  for each  Portfolio Property  by capitalizing  the
          estimated   net  operating  income  at  a  rate  determined  in
          accordance with surveys of  buyers of self-storage  properties,
          as  confirmed by a review of comparable sales transactions, and
          deemed appropriate given the characteristics of each  property.
          Capitalization  rates ranging from 9.25% to 10.25% were applied
          to  the  projected  net  operating  income  from  each  of  the
          Portfolio  Properties which were considered to be at stabilized
          occupancy  during   the  twelve-month   period  following   the
          valuation date.
 
        - DISCOUNTED  CASH FLOW  ANALYSIS -- In  applying discounted cash
          flow analysis,  projections of  cash flows  from each  property
          (assuming no indebtedness thereon) for a ten-year period ending
          December  31, 2005 were developed.  The base year projection of
          net operating income  was prepared consistent  with the  direct
          capitalization  analysis based  upon the  analysis of effective
          gross income and expenses  described above. Income and  expense
          escalators  used in  developing the  projections were  based on
          projection parameters  in  use  as of  the  Valuation  Date  by
          property  investors,  market factors,  historical  and budgeted
          financial results  for  each  property,  and  inflation  rates.
          Income  escalators generally ranged from  3% to 3.5%. In highly
          competitive markets or where a property's operations were below
          stabilized levels, income  escalators were  adjusted as  deemed
          appropriate  or  until  stabilized  operations  were  achieved.
          Effective expense  escalators  generally ranged  from  2.7%  to
          3.5%.
 
    To  determine  the  residual value  for  each  property at  the  end  of the
projection period, the estimated  net operating income of  the property for  the
twelve months ending December 2006 was
 
                                      B-9
<PAGE>
capitalized   at  a   rate  deemed   appropriate  for   the  property.  Terminal
capitalization rates generally ranged  from 10.0% to 10.75%  and for the  office
property  was 11.0%. The residual value was  discounted to a present value after
deducting appropriate sales expenses using the same discount rate applied to the
stream of annual  cash flows. The  discount rate employed  was based on  current
acquisition   criteria   among  self-storage   investors,  commercial/industrial
property investors' target rates of return,  and the historical spread in  rates
of  return between  real estate and  other investments.  Discount rates utilized
ranged from 12.0% to 12.5%.
 
    The results  of each  analysis (direct  capitalization and  discounted  cash
flow)  then  were  correlated  to  arrive  at  a  final  income  approach  value
determination.
 
SALES COMPARISON ANALYSIS
 
    In the course of performing the Portfolio Valuations, Stanger compiled  data
on  actual transactions  involving properties similar  in type  to the Portfolio
Properties. To gather such  data, Stanger interviewed  various sources in  local
markets  to identify recent sales  of self-storage or office/storage properties,
reviewed  publicly  available  information   on  acquisitions  of   self-storage
properties by certain publicly owned real estate companies, reviewed information
provided by management, and contacted various industry sources for data.
 
    For each Portfolio Property, the data was grouped into local and/or regional
transactions.  Where  local  transactions  sample  sizes  were  small  or dated,
regional and/or national data was relied upon.
 
    Utilizing such data,  an index  of value was  derived based  upon price  per
square  foot. The index of value was applied to each property to estimate value.
Price per square foot as estimated by reference to comparable sales transactions
was multiplied by  the rentable  square footage of  each property  to derive  an
estimated range of value.
 
    In  addition,  Stanger  conducted  a  statistical  analysis  of self-storage
property transaction data  to determine  value indicators  reflective of  recent
market  conditions. Due to  the relatively low number  of recent transactions in
any specific local or regional market from which to extract reliable statistical
indicators, Stanger  utilized  a  sample  of  recent  national  transactions.  A
regression  analysis  was performed  to determine  the relationship  between the
price per square foot paid in  recent transactions and the net operating  income
of  the property acquired. Based on this analysis, a probable range of value per
square foot was derived for each  property. The resulting indicated values  were
reconciled.
 
    In  the  case of  the Stone  Mountain  and Forest  Park properties  owned by
IDS/Shurgard  Income   Growth  Partners   L.P.  III,   the  valuation   included
consideration  of the  value of excess  land parcels currently  held for resale.
Such values were  determined utilizing  the sales comparison  approach based  on
analysis  of transactions  involving land  parcels in  the local  market of each
property.
 
SALES COMPARISON APPROACH AND INCOME APPROACH RECONCILIATION
 
    The estimated  values  resulting from  the  Sales Comparison  Approach  were
reconciled  with the values estimated resulting from the Income Approach (direct
capitalization and discounted cash flow  analyses) for each Portfolio  Property,
and the resulting values were summed to determine the estimated value of each of
the Portfolios.
 
    The  Income  Approach  reflects  the quality,  durability  and  risk  of the
estimated income stream. Properties such as the subject Portfolio Properties are
typically purchased and sold based upon their income characteristics. The Income
Approach was given primary consideration based upon the income producing  nature
of  the Portfolio Properties and their appeal to investors. The Sales Comparison
Approach was given secondary consideration.
 
    Where necessary, Stanger  adjusted the value  conclusion for each  Portfolio
Property  to reflect any deferred maintenance items, excess land associated with
the Property, and joint venture interests, if any.
 
                                      B-10
<PAGE>
                          PORTFOLIO VALUE CONCLUSIONS
 
    Based upon the review as described above, it is our opinion that the  market
value  of  the  fee  simple  interests or,  where  appropriate,  the  leased fee
interests in each Portfolio as of December 31, 1995 is as follows:
 
                    IDS/SHURGARD INCOME GROWTH PARTNERS L.P.
           FORTY MILLION, THREE HUNDRED AND SEVENTY THOUSAND DOLLARS
                                  $40,370,000
 
                            ------------------------
 
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. II
 
            THIRTY MILLION, FIVE HUNDRED AND TWENTY THOUSAND DOLLARS
 
                                  $30,520,000
 
                            ------------------------
 
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. III
 
            FIFTY MILLION, EIGHT HUNDRED AND NINETY THOUSAND DOLLARS
 
                                  $50,890,000
 
                            ------------------------
 
                                      B-11
<PAGE>
                               PORTFOLIO SUMMARY
                    IDS/SHURGARD INCOME GROWTH PARTNERS L.P.
                               DECEMBER 31, 1995
 
<TABLE>
<CAPTION>
                                                                                        RENTABLE
                                                                                         SQUARE
  NUMBER                    PROPERTY ADDRESS                           TYPE             FOOTAGE
- -----------  -----------------------------------------------  ----------------------  ------------
<C>          <S>                                              <C>                     <C>
       1-1   Shurgard of Ontario                                   Self-Storage          56,900
             2249 South Grove Ave., Ontario, CA
       1-2   Shurgard of Walnut                                    Self-Storage          95,500
             21035 East Washington St., Walnut, CA
       1-3   Shurgard of Margate                                   Self-Storage          75,300
             5150 West Copans Road, Margate, FL
       1-4   Shurgard Morgan Falls                                 Self-Storage          75,700
             7760 Roswell Road, Dunwoody, GA
       1-5   Shurgard of Burke                                     Self-Storage          31,900
             5609 Guinea Road, Fairfax, VA
       1-6   Shurgard of Midlothian Turnpike                       Self-Storage          43,500
             10110 Midlothian Turnpike,
             Richmond, VA
       1-7   Shurgard of S. Military Hwy                           Self-Storage          48,300
             788 South Military Hwy.,
             Virginia Beach, VA
       1-8   Shurgard of Factoria Square                           Self-Storage          70,200
             4041 124th Avenue SE., Bellevue, WA
     JP2-1   Shurgard of Canton                                    Self-Storage          40,800(1)
             2101 Haggerty Road, Canton, MI
     JP2-2   Shurgard of Fraser                                    Self-Storage          50,900(1)
             32775 Groesbeck Road, Fraser, MI
     JP2-3   Shurgard of Livonia                                   Self-Storage          47,000(1)
             30300 Plymouth Road, Livonia, MI
     JP2-4   Shurgard of Warren                                    Self-Storage          47,700(1)
             2498 10 Mile Road, Warren, MI
</TABLE>
 
- ------------------------
(1) Rentable square footage of the property reflects the Partnership's 70%
    interest in the joint venture which owns the Property.
 
                                      B-12
<PAGE>
                               PORTFOLIO SUMMARY
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. II
                               DECEMBER 31, 1995
 
<TABLE>
<CAPTION>
                                                                                        RENTABLE
                                                                                         SQUARE
  NUMBER                    PROPERTY ADDRESS                           TYPE              FOOTAGE
- -----------  -----------------------------------------------  ----------------------  -------------
<C>          <S>                                              <C>                     <C>
       2-1   Shurgard of Orange                                    Self-Storage           89,600
             623 West Collins Ave., Orange, CA
       2-2   Shurgard of Sterling Heights                          Self-Storage          103,800
             36260 Van Dyke Ave.,
             Sterling Heights, MI
       2-3   Shurgard of T.C. Jester                               Self-Storage           64,000
             2100 North Loop West, Houston, TX
       2-4   Shurgard of Newport News North                        Self-Storage           59,100
             13142 N. Jefferson Ave.,
             Newport News, VA
       2-5   Shurgard of Chesapeake                                Self-Storage           58,400
             940 Professional Place, Chesapeake, VA
       2-6   Shurgard of Leesburg                                  Self-Storage           27,600
             11 Lawson Road SE., Leesburg, VA
       2-7   Shurgard of Kennydale                             Self-Storage/Retail        66,500
             1755 NE 48th Street, Renton, WA
       2-8   Shurgard of Bellefield                                Self-Storage           65,100
             1111 118th Avenue SE., Bellevue, WA
</TABLE>
 
                                      B-13
<PAGE>
                               PORTFOLIO SUMMARY
                  IDS/SHURGARD INCOME GROWTH PARTNERS L.P. III
                               DECEMBER 31, 1995
 
<TABLE>
<CAPTION>
                                                                                        RENTABLE
                                                                                         SQUARE
  NUMBER                    PROPERTY ADDRESS                           TYPE             FOOTAGE
- -----------  -----------------------------------------------  ----------------------  ------------
<C>          <S>                                              <C>                     <C>
       3-1   Shurgard of Gilbert                                   Self-Storage          65,800
             405 North Gilbert, Gilbert, AZ
       3-2   Shurgard of Dobson Ranch                              Self-Storage          58,500
             2640 South Alma School Road,
             Mesa, AZ
       3-3   Shurgard of Castro Valley                             Self-Storage          69,300
             21655 & 21082 Redwood Road,
             Castro Valley, CA
       3-4   Castro Valley Office Building                            Office              3,100
             21663 Redwood Road,
             Castro Valley, CA
       3-5   Shurgard of Newark                                    Self-Storage          61,500
             37444 Cedar Boulevard, Newark, CA
       3-6   Shurgard of Sacramento                                Self-Storage          53,100
             8959 Pocket Road, Sacramento, CA
       3-7   Shurgard of San Leandro                               Self-Storage          58,500
             2011 Marina Boulevard,
             San Leandro, CA
       3-8   Shurgard of San Lorenzo                               Self-Storage          54,100
             16025 Ashland Avenue,
             San Lorenzo, CA
       3-9   Shurgard of Delray Beach                              Self-Storage          77,300
             6000 West Atlantic Avenue,
             Delray Beach, FL
      3-10   Shurgard of Norcross                                  Self-Storage          61,800
             5010 Jimmy Carter Boulevard, Norcross, GA
      3-11   Shurgard of Stone Mountain                            Self-Storage          61,200(1)
             840 Hambrick Road,
             Stone Mountain, GA
      3-12   Shurgard of Tucker                                Self-Storage/Office       60,000
             2660 Mountain Industrial Boulevard, Tucker, GA
      3-13   Shurgard of Forest Park                               Self-Storage          65,200(2)
             5979 Old Dixie Road, Forest Park, GA
      3-14   Shurgard of Rochester/Utica                           Self-Storage          56,600
             2100 West Utica Road, Utica, MI
      3-15   Shurgard of Allen Boulevard                           Self-Storage          42,500
             11160 SW Allen Boulevard,
             Beaverton, OR
</TABLE>
 
                                      B-14
<PAGE>
<TABLE>
<CAPTION>
                                                                                        RENTABLE
                                                                                         SQUARE
  NUMBER                    PROPERTY ADDRESS                           TYPE             FOOTAGE
- -----------  -----------------------------------------------  ----------------------  ------------
      3-16   Shurgard of Windcrest                                 Self-Storage          86,200
             10652 Interstate Hwy 35 N,
             San Antonio, TX
<C>          <S>                                              <C>                     <C>
      3-17   Shurgard of Tracy                                     Self-Storage          69,600
             400 West Larch Road, Tracy, CA
</TABLE>
 
- ------------------------
(1) Stone Mountain Property includes approximately 1.5 acres of excess land held
    for resale.
 
(2) Forest Park Property includes approximately  1.99 acres of excess land  held
    for resale.
 
                                      B-15
<PAGE>
                      ASSUMPTIONS AND LIMITING CONDITIONS
 
    This  summary appraisal  report is subject  to the  assumptions and limiting
conditions as set forth below.
 
    1.  No responsibility is assumed for matters of a legal nature affecting the
Portfolio Properties or the titles thereto. Titles to the properties are assumed
to be good and marketable and the  properties are assumed free and clear of  all
liens unless otherwise stated.
 
    2.   The Portfolio Valuations assume (a) responsible ownership and competent
management of the properties; (b) there  are no hidden or unapparent  conditions
of the properties' subsoil or structures that render the properties more or less
valuable  (no responsibility is assumed for such conditions or for arranging for
engineering studies that may be required to discover them); (c) full  compliance
with  all applicable federal,  state and local  zoning, access and environmental
regulations and laws, unless noncompliance is stated, defined and considered  in
the  Appraisal; and  (d) all  required licenses,  certificates of  occupancy and
other governmental consents have been or can be obtained and renewed for any use
on which the value estimates contained in the Portfolio Valuations are based.
 
    3.  The Appraiser shall not be required to give testimony or appear in court
because of  having  made the  appraisal  with  reference to  the  portfolios  in
question, unless arrangements have been previously made therefore.
 
    4.   The information contained in the Portfolio Valuations or upon which the
Portfolio Valuations are  based has been  provided by or  gathered from  sources
assumed  to be reliable and accurate. Some of such information has been provided
by the owner of the properties. The  Appraiser shall not be responsible for  the
accuracy  or  completeness of  such  information, including  the  correctness of
estimates,  opinions,  dimensions,  exhibits  and  other  factual  matters.  The
Portfolio  Valuations and the opinion of value stated therein are as of the date
stated in  the  Portfolio  Valuations.  Changes since  that  date  in  property,
external and market factors can significantly affect portfolio value.
 
    5.   Disclosure of the  contents of the appraisal  report is governed by the
Bylaws and Regulations of the professional appraisal organization with which the
Appraiser is affiliated.
 
    6.  Neither all, nor any part of the content of the report, or copy  thereof
(including  conclusions  as  to  the portfolios'  values,  the  identity  of the
Appraiser, professional designations,  reference to  any professional  appraisal
organizations,  or the firm with which the Appraiser is connected) shall be used
for any  purpose  by anyone  other  than the  client  specified in  the  report,
including,  but not limited  to, the mortgagee or  its successors and assignees,
mortgage insurers, consultants, professional appraisal organizations, any  state
or   federally  approved  financial  institution,   any  department,  agency  or
instrumentality without the previous written consent of the Appraiser; nor shall
it be conveyed by  anyone to the public  through advertising, public  relations,
news  sales or  other media,  without the  written consent  and approval  of the
Appraiser.
 
    7.  On  all appraisals subject  to completion, repairs  or alterations,  the
appraisal  report and  value conclusions are  contingent upon  completion of the
improvements in a workmanlike manner.
 
    8.  The physical condition of  the improvements considered by the  Portfolio
Valuations   are  based  on   visual  inspection  by   the  Appraiser  or  other
representatives of Stanger and on representations by the owner. Stanger  assumes
no  responsibility for the soundness of  structural members or for the condition
of mechanical equipment,  plumbing or electrical  components. The Appraiser  has
made no surveys of the Portfolio Properties.
 
    9.   The  projections of  income and  expenses and  the valuation parameters
utilized are not  predictions of the  future. Rather, they  are the  Appraiser's
best estimate of current market thinking relating to future income and expenses.
The  Appraiser makes no warranty or  representations that these projections will
materialize. The real estate market  is constantly fluctuating and changing.  It
is not the Appraiser's task to predict or in any way warrant the conditions of a
future  real estate market;  the Appraiser can only  reflect what the investment
community, as of the date of the Appraisal,
 
                                      B-16
<PAGE>
                ASSUMPTIONS AND LIMITING CONDITIONS (CONTINUED)
envisions for the future in terms of rental rates, expenses, supply and  demand.
We  have used  methods and  assumptions deemed  appropriate in  our professional
judgment; however,  future  events may  demonstrate  that the  assumptions  were
incorrect  or that  other different  methods or  assumptions may  have been more
appropriate.
 
    10. The  Portfolio  Valuations represent  a  normal consideration  for  each
Portfolio's Properties based on a cash purchase and unaffected by special terms,
services, fees, costs, or credits incurred in the transaction.
 
    11.  Unless  otherwise  stated in  the  report, the  existence  of hazardous
materials, which may or may not be present on the Portfolio Properties, was  not
disclosed  to the Appraiser by the owner.  The Appraiser has no knowledge of the
existence of such  materials on  or in  the Portfolio  Properties. However,  the
Appraiser is not qualified to detect such substances. The presence of substances
such  as  asbestos,  ureaformaldehyde  foam  insulation,  oil  spills,  or other
potentially hazardous  materials may  affect the  value of  the Portfolios.  The
Portfolio Value estimates are predicated on the assumption that there is no such
material  on or in the Portfolio Properties that would cause a loss of value. No
responsibility  is  assumed  for  such  conditions,  or  for  any  expertise  or
engineering  knowledge required to discover them.  The client is urged to retain
an expert in this field, if desired.
 
    12. For purposes of this report, it is assumed that each Portfolio  Property
is  free  of  any  negative  impact with  regard  to  the  Environmental Cleanup
Responsibility Act (ECRA) or any other environmental problems or with respect to
non-compliance with the Americans with Disabilities Act (ADA). No  investigation
has  been made by the  Appraiser with respect to  any potential environmental or
ADA problems. Environmental and ADA compliance studies are not within the  scope
of this report.
 
    13.  Pursuant to  the Engagement  Agreements, the  Portfolio Valuations have
been prepared  on  a  limited scope  basis  using  a summary  report  format  in
conformity   with  the  departure   provisions  of  the   Uniform  Standards  of
Professional Appraisal  Practice and  the  Standards of  Professional  Appraisal
Practice  of the Appraisal  Institute, relying on the  income approach and sales
comparison approach to value.  Further, the engagements call  for delivery of  a
summary  appraisal report  in which  the content has  been limited  to that data
presented herein. As such, the summary appraisal report is not designed to  meet
the  requirements  of Title  XI of  the  Federal Financial  Institutions Reform,
Recovery  and   Enforcement  Act   of  1989.   Therefore,  federally   regulated
institutions should not rely on this report for financing purposes.
 
    14.  The Portfolio Valuations reported herein may not reflect the premium or
discount a potential buyer may assign to an assembled portfolio of properties or
to  a  group  of  properties  in  a  particular  local  market  which   provides
opportunities  for enhanced market presence  and penetration. In addition, where
properties are owned  jointly with  other entities affiliated  with the  general
partner, minority interest discounts were not applied.
 
    15.  The appraisals are solely  for the purpose of  providing our opinion of
the value of the Portfolios, and we make no representation as to the adequacy of
such reviews for any  other purpose. The owner  has directed that the  Portfolio
Properties be valued assuming the properties are free and clear of any debt. The
use of other valuation methodologies might produce a higher or lower value.
 
    16.  In addition to  these general assumptions  and limiting conditions, any
assumptions or conditions applicable to  specific properties have been  retained
in our files.
 
                                      B-17
<PAGE>
                                                                      APPENDIX C
 
- --------------------------------------------------------------------------------
                                                               1129 Broad Street
                                                       Shrewsbury, NJ 07702-4314
ROBERT A. STANGER & CO., INC.
                                                                  (908) 389-3600
                                                             FAX: (908) 389-1751
 FINANCIAL AND MANAGEMENT CONSULTANTS
                                                                  (908) 544-0779
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
IDS/Shurgard Income Growth Partners L.P.
IDS/Shurgard Income Growth Partners L.P. II
IDS/Shurgard Income Growth Partners L.P. III
1201 Third Avenue, Suite 2200
Seattle, Washington 98101
 
Gentlemen:
 
    We  have  been  advised  that  IDS/Shurgard  Income  Growth  Partners  L.P.,
IDS/Shurgard Income  Growth Partners  L.P. II,  and IDS/Shurgard  Income  Growth
Partners  L.P.  III  (collectively,  the  "Partnerships")  are  contemplating  a
transaction (the "Merger")  in which  one or more  of the  Partnerships will  be
merged  with and  into Shurgard Storage  Centers, Inc.  ("SSCI"), an affiliated,
publicly traded  real  estate  investment  trust,  pursuant  to  an  acquisition
agreement  (the "Acquisition Agreement")  between the Partnerships  and SSCI. In
the Merger, the limited  partners of the  Partnerships (the "Limited  Partners")
will  be  asked to  approve the  Merger with  SSCI pursuant  to which  they will
receive as consideration newly issued shares of SSCI Class A Common Stock (  the
"Shares")  and, in  the case  of fractional shares,  cash. We  have been further
advised that the Consideration to be received  in the Merger by the partners  of
each  Partnership will be  that number of  Shares and cash  such that the market
value of  the Shares  and cash  will be  equal to  $40,066,700 for  IDS/Shurgard
Income Growth Partners L.P., $26,861,846 for IDS/Shurgard Income Growth Partners
L.P. II, and $39,649,643 for IDS/Shurgard Income Growth Partners L.P. III, which
amounts  represent the estimated net asset value of each Partnership as of March
31, 1996 (collectively, the "Consideration"). To the extent a Partnership's  net
asset  value as of  the closing date of  the Merger exceeds  the net asset value
indicated above, the Partnership will distribute  such excess amount in cash  to
the  partners of such Partnership as soon  as practicable after the closing date
of the Merger. For the purposes of determining the number of Shares to be issued
to each Partnership in the Merger, we have been advised that the market value of
the Shares (the "Share Value")  will be based on  the average per share  closing
prices  on  the  New  York  Stock  Exchange  of  the  Shares  during  the twenty
consecutive trading days ending on the fifth trading day prior to the day of the
meeting of  limited partners  of the  applicable Partnership  on which  day  the
general  partner of such Partnership actually calls  for the vote of the Limited
Partners to approve the Merger, subject  to the condition that such Share  Value
falls within the range of $22.25 to $27.75 per Share (the "Share Value Range").
 
    The  general  partners of  the Partnerships  have  requested that  Robert A.
Stanger & Co., Inc. ("Stanger")  provide its opinion as  to the fairness to  the
Limited  Partners of each  Partnership, from a  financial point of  view, of the
Consideration to be received in the Merger by each respective Partnership.
 
    In the course of  our review to  render this opinion,  we have, among  other
things:
 
    - Reviewed  a draft of (i) the Acquisition Agreement, (ii) Offer to Purchase
      for each Partnership related  to a tender offer  by SSCI for interests  in
      each  Partnership, and (iii) the Proxy Statement/Prospectus related to the
      Merger, which drafts management of the Partnerships has indicated to be in
      substantially the  form  intended  to  be finalized  and  filed  with  the
      Securities and Exchange Commission (the "SEC");
 
                                      C-1
<PAGE>
    - Reviewed the Partnerships' and SSCI's annual reports filed with the SEC on
      Form  10-K for the fiscal  years ending December 31,  1993, 1994 and 1995,
      and quarterly  reports filed  with the  SEC on  Form 10-Q  for the  period
      ending March 31, 1996;
 
    - Reviewed  the SSCI pro forma financial  statements and pro forma schedules
      prepared by the Partnerships' management and SSCI's management;
 
    - Performed appraisals  of  the  portfolios  of  properties  owned  by  each
      Partnership  as of December 31, 1995 (the "Portfolio Valuations") pursuant
      to a  separate  engagement agreement  to  perform such  services  for  the
      Partnerships;
 
    - Reviewed   information  regarding  purchases  and  sales  of  self-storage
      properties by SSCI or  any affiliated entities  during the prior  12-month
      period  and other  information available relating  to acquisition criteria
      for self-storage properties;
 
    - Reviewed  internal  financial  analyses  and  forecasts  prepared  by  the
      Partnerships  of the current net liquidation value of each Partnership and
      projections of going-concern values for each Partnership, which were based
      in part on the Portfolio Valuations;
 
    - Discussed with members of senior  management of the Partnerships and  SSCI
      conditions  in self-storage property markets, conditions in the market for
      sales/acquisitions  of   properties  similar   to  those   owned  by   the
      Partnerships,  current and  projected operations and  performance, and the
      financial condition and future  prospects of the  properties owned by  the
      Partnerships, the Partnerships and SSCI;
 
    - Reviewed  historical market prices, trading  volume and dividends for SSCI
      Common Stock; and
 
    - Conducted other  studies, analyses,  inquiries  and investigations  as  we
      deemed appropriate.
 
    In rendering this fairness opinion, we have relied upon and assumed, without
independent verification, the accuracy and completeness in all material respects
of  all financial and other information contained  in each Offer to Purchase and
the Proxy Statement/Prospectus or that  was furnished or otherwise  communicated
to  us  by the  Partnerships  and SSCI.  We  have not  performed  an independent
appraisal of the non-real estate assets and liabilities of the Partnerships, and
we have relied upon the balance  sheet value determinations and the  adjustments
thereto  made by the general  partners to determine the  net asset value of each
Partnership. We have also relied on  the assurance of the Partnerships and  SSCI
that  the allocation  of the Consideration  within each  Partnership between the
general partner and Limited  Partners is consistent with  the provisions of  the
Partnership  Agreements; that  any pro forma  financial statements, projections,
budgets, estimates of environmental liability, or value estimates or adjustments
contained in  the  Offers to  Purchase  and the  Proxy  Statement/Prospectus  or
otherwise  provided or  communicated to  us, were  reasonably prepared  on bases
consistent with  actual historical  experience and  reflect the  best  currently
available  estimates and  good faith  judgments; that  no material  changes have
occurred in the appraised  value of the properties  or the information  reviewed
between  the  date  of  the  Portfolio  Valuations  or  the  date  of  the other
information provided and the date of this letter; and that the Partnerships  and
SSCI  are not aware of any information or facts that would cause the information
supplied to us to be incomplete or misleading in any material respect.
 
    We have not been requested to, and therefore did not: (i) select the  method
of   determining  the  Consideration  offered  in  the  Merger;  (ii)  make  any
recommendation to  the Limited  Partners  of the  Partnerships with  respect  to
whether  to approve or reject  the Merger, or whether  to select the cash tender
offer made by SSCI  or the Shares  offered in the Merger;  or (iii) express  any
opinion  as to the business  decision to effect the  Merger, alternatives to the
Merger, tax factors resulting from the Merger, the fairness of the Consideration
to be received in  the Merger at  a Share Value  outside of the  low end of  the
Share  Value Range,  the allocation of  expenses associated with  the Merger and
related tender offers between and among the Partnerships and SSCI, or any  terms
of  the Merger other than  the Consideration. Our opinion  is based on business,
economic, real estate and securities markets, and
 
                                      C-2
<PAGE>
other conditions as of the date of our analysis and addresses the Merger in  the
context  of  information  available  as  of the  date  of  our  analysis. Events
occurring after  that  date  may  materially  affect  the  assumptions  used  in
preparing the opinion.
 
    Based  upon and subject to the foregoing, and in reliance thereon, it is our
opinion that as of the date of  this letter the Consideration to be received  in
the  Merger by  the Limited  Partners is  fair to  the Limited  Partners of each
respective Partnership from a financial point of view.
 
    The preparation  of a  fairness opinion  is  a complex  process and  is  not
necessarily  susceptible  to partial  analysis or  summary description.  We have
advised each of the Partnerships that our entire analysis must be considered  as
a  whole and that selecting portions of  our analysis and the factors considered
by us, without considering  all analyses and facts,  could create an  incomplete
view of the evaluation process underlying this opinion.
 
Yours truly,
Robert A. Stanger & Co., Inc.
Shrewsbury, NJ
July 1, 1996
 
                                      C-3
<PAGE>
                                                                      APPENDIX D
 
                                     [LOGO]
                                  July 1, 1996
 
Special Committee of the Board of Directors
  of Shurgard Storage Centers, Inc.
c/o Latham & Watkins
650 Town Center Drive, 20th Floor
Costa Mesa, California 92626-1925
 
Dear Sirs:
 
    We  understand that Shurgard  Storage Centers, Inc.  (the "Company") and IDS
Shurgard Income  Growth  Partners L.P.  ("IDS  I"), IDS/Shurgard  Income  Growth
Partners  L.P. II ("IDS II")  and IDS/ Shurgard Income  Growth Partners L.P. III
("IDS III"; each of IDS I, IDS II and IDS III may be referred to separately as a
"Partnership" or collectively  as the  "Partnerships") intend to  enter into  an
Acquisition  Agreement  (the "Agreement")  pursuant  to which  the  Company will
commence a cash tender offer  for (i) up to 65,000  of the outstanding units  of
limited  partnership of  IDS I, (ii)  up to  49,000 of the  outstanding units of
limited partnership of IDS II, and (iii)  up to 52,000 of the outstanding  units
of  limited partnership  of IDS  III (collectively,  the "Tender  Offers"). Upon
completion of the Tender Offers and if certain conditions have been satisfied or
waived, including the receipt  of requisite approval by  the holders of  limited
partnership  units of each Partnership, each Partnership will be merged with and
into the  Company  (the  "Mergers")  and the  general  and  limited  partnership
interests  in each  of the  Partnerships will be  converted into  that number of
shares of Class A Common Stock, par  value $.001 per share ("Common Stock"),  of
the  Company obtained  by dividing (i)  the Net  Asset Value (as  defined in the
Agreement) of the respective Partnerships allocable to such interests by (ii)  a
20  trading day average of the per share  closing prices for the Common Stock on
the New York  Stock Exchange (subject  to a  minimum and maximum  of $22.25  and
$27.75, respectively). You have requested our opinion, as investment bankers, as
to the fairness, from a financial point of view, of the consideration to be paid
in connection with the Tender Offers and the Mergers.
 
    Alex.  Brown & Sons Incorporated ("Alex. Brown"), as a customary part of its
investment banking business, is engaged in the valuation of businesses and their
securities   in   connection   with   mergers   and   acquisitions,   negotiated
underwritings, private placements and valuations for estate, corporate and other
purposes.  We have acted  as financial advisor  to the Special  Committee of the
Board of Directors in connection with the Tender Offers and the Mergers and have
received a fee for our services. We have also acted as a managing underwriter of
a past offering of the Common Stock and advised a special committee of the Board
of Directors of  the Company  regarding its merger  with Shurgard  Incorporated.
Alex.  Brown regularly publishes research reports  regarding the real estate and
real estate investment  trust industries  and the businesses  and securities  of
publicly  owned companies  in those  industries. In  the ordinary  course of our
business, we may  actively trade the  Common Stock  of the Company  for our  own
account  and for the account of our  customers and, accordingly, may at any time
hold a long or short position in the Company's Common Stock.
 
    In connection with our  opinion, we have reviewed  drafts of the  Agreement,
the  Offer to Purchase and the Registration Statement of the Company on Form S-4
(the "Registration  Statement")  with  respect  to the  Tender  Offers  and  the
Mergers,    as   well   as   certain    publicly   available   information   and
 
                                      D-1
<PAGE>
certain internal financial and other information furnished to us by the  Company
and  the Partnerships. We have also held  discussions with members of the senior
management of the Company  and a general partner  of each Partnership's  general
partner   regarding  the  business   and  prospects  of   the  Company  and  the
Partnerships. In addition, we have (i)  reviewed the reported price and  trading
activity  for the Common Stock and each Partnership's limited partnership units,
(ii) compared certain financial  and stock market  information for certain  real
estate  companies  whose  securities  are publicly  traded,  (iii)  reviewed the
financial terms  of  certain  recent acquisitions  in  the  public  self-storage
industry  and (iv) performed such other studies and analyses and considered such
other factors as we deemed appropriate.
 
    In conducting our review and in rendering our opinion, we have assumed  that
the definitive Agreement, Offer to Purchase and Registration Statement will not,
when  executed or filed, as the case may be, differ in any material respect from
the drafts thereof which  we have reviewed. We  have not independently  verified
the  information described above  and for purposes of  this opinion have assumed
the accuracy, completeness  and fairness  thereof. With  respect to  information
relating  to the prospects of the Company  and the Partnerships, we have assumed
that such  information  reflects  the best  currently  available  estimates  and
judgments  of the Company's management  and of a general  partner of each of the
Partnership's general partner as to  the likely future financial performance  of
the  Company and the Partnerships. In addition,  we have not made or obtained an
independent evaluation  of  the  assets  of  the  Company,  the  assets  of  the
Partnerships  or  reviewed environmental  issues  relating to  the  Company, the
Partnerships, the Tender Offers or the Mergers. Our opinion is based on  market,
economic  and other conditions as they exist and can be evaluated as of the date
of this letter.
 
    Based upon and  subject to the  foregoing, it is  our opinion as  investment
bankers that, as of the date of this letter, the consideration to be paid by the
Company  in each of the Tender Offers and  the Mergers is fair, from a financial
point of view, to the Company.
 
                                          Very truly yours,
 
                                          Alex. Brown & Sons Incorporated
 
                                      D-2
<PAGE>
                                   APPENDIX E
                   WASHINGTON UNIFORM LIMITED PARTNERSHIP ACT
                         (RCW TITLE 25.10, ARTICLE 14)
                               DISSENTERS' RIGHTS
 
25.10.900  DEFINITIONS.
 
    As used in this article:
 
    (1)  "Limited partnership" means  the domestic limited  partnership in which
the dissenter holds  or held a  partnership interest, or  the surviving  limited
partnership  or  corporation by  merger, whether  foreign  or domestic,  of that
limited partnership.
 
    (2) "Dissenter" means a partner  who is entitled to  dissent from a plan  of
merger  and who  exercises that right  when and  in the manner  required by this
article.
 
    (3) "Fair value," with respect to a dissenter's partnership interest,  means
the value of the partnership interest immediately before the effectuation of the
merger   to  which  the   dissenter  objects,  excluding   any  appreciation  or
depreciation  in  anticipation   of  the  merger   unless  exclusion  would   be
inequitable.
 
    (4)  "Interest" means interest  from the effective date  of the merger until
the date  of  payment,  at  the  average rate  currently  paid  by  the  limited
partnership  on its principal bank loans or, if none, at a rate that is fair and
equitable under all the circumstances.
 
25.10.905  PARTNER -- DISSENT -- PAYMENT OF FAIR VALUE.
 
    (1) Except as  provided in  RCW 25.10.915 or  25.10.925(2), a  partner of  a
domestic limited partnership is entitled to dissent from, and obtain payment of,
the   fair  value  of  the  partner's  partnership  interest  in  the  event  of
consummation of a plan of merger to which the limited partnership is a party  as
permitted by RCW 25.10.800 or 25.10.840.
 
    (2)  A  partner entitled  to dissent  and obtain  payment for  the partner's
partnership interest under this  article may not  challenge the merger  creating
the  partner's entitlement unless the merger fails to comply with the procedural
requirements imposed by this title, Title 23B RCW, the partnership agreement, or
is fraudulent with respect to the partner or the limited partnership.
 
    (3) The right of a dissenting partner to obtain payment of the fair value of
the partner's partnership interest  shall terminate upon  the occurrence of  any
one of the following events:
 
        (a) The proposed merger is abandoned or rescinded;
 
        (b)  A court having  jurisdiction permanently enjoins  or sets aside the
    merger; or
 
        (c) The  partner's demand  for  payment is  withdrawn with  the  written
    consent of the limited partnership.
 
25.10.910  DISSENTERS' RIGHTS -- NOTICE -- TIMING.
 
    (1)  Not less than ten days  prior to the approval of  a plan of merger, the
limited partnership must send a written notice to all partners who are  entitled
to  vote on or  approve the plan of  merger that they may  be entitled to assert
dissenters' rights under  this article. Such  notice shall be  accompanied by  a
copy of this article.
 
    (2)  The  limited  partnership  shall notify  in  writing  all  partners not
entitled to vote on or  approve the plan of merger  that the plan of merger  was
approved, and send them the dissenters' notice as required by RCW 25.10.920.
 
                                      E-1
<PAGE>
25.10.915  PARTNER -- DISSENT -- VOTING RESTRICTION.
 
    A  partner who is entitled to vote on  or approve the plan of merger and who
wishes to assert dissenters'  rights must not  vote in favor  of or approve  the
plan  of merger. A partner who does not satisfy the requirements of this section
is not entitled to payment for the partner's interest under this article.
 
25.10.920  PARTNERS -- DISSENTERS' NOTICE -- REQUIREMENTS.
 
    (1) If the plan of merger is approved, the limited partnership shall deliver
a written dissenters' notice to all  partners who satisfied the requirements  of
RCW 25.10.915.
 
    (2) The dissenters' notice required by RCW 25.10.910(2) or by subsection (1)
of  this section must be sent within ten  days after the approval of the plan of
merger, and must:
 
        (a) State where the payment demand must be sent;
 
        (b) Inform holders of the partnership interest as to the extent transfer
    of the partnership interest will be restricted as permitted by RCW 25.10.930
    after the payment demand is received;
 
        (c) Supply a form for demanding payment;
 
        (d) Set a date by which the limited partnership must receive the payment
    demand, which date may  not be fewer  than thirty nor  more than sixty  days
    after the date the notice under this section is delivered; and
 
        (e) Be accompanied by a copy of this article.
 
25.10.925  PARTNER -- PAYMENT DEMAND -- ENTITLEMENT.
 
    (1)  A partner  who demands  payment retains all  other rights  of a partner
until the proposed merger becomes effective.
 
    (2) A partner sent a dissenters' notice  who does not demand payment by  the
date  set in the dissenters' notice is not entitled to payment for the partner's
partnership interest under this article.
 
25.10.930  PARTNERSHIP INTERESTS -- TRANSFER RESTRICTIONS.
 
    The limited partnership may restrict  the transfer of partnership  interests
from the date the demand for their payment is received until the proposed merger
becomes effective or the restriction is released under this article.
 
25.10.935  PAYMENT OF FAIR VALUE -- REQUIREMENTS FOR COMPLIANCE.
 
    (1)  Within thirty days of the later of the date the proposed merger becomes
effective, or the payment demand is received, the limited partnership shall  pay
each   dissenter  who  complied  with  RCW  25.10.925  the  amount  the  limited
partnership estimates to  be the fair  value of the  partnership interest,  plus
accrued interest.
 
    (2) The payment must be accompanied by:
 
        (a)  Copies of the financial statements  for the most recent fiscal year
    maintained as required by RCW 25.10.050;
 
        (b) An explanation  of how  the limited partnership  estimated the  fair
    value of the partnership interest;
 
        (c) An explanation of how the accrued interest was calculated;
 
        (d) A statement of the dissenter's right to demand payment; and
 
        (e) A copy of this article.
 
                                      E-2
<PAGE>
25.10.940  MERGER -- NOT EFFECTIVE WITHIN SIXTY DAYS -- TRANSFER RESTRICTIONS.
 
    (1) If the proposed merger does not become effective within sixty days after
the  date set for  demanding payment, the limited  partnership shall release any
transfer restrictions imposed as permitted by RCW 25.10.930.
 
    (2) If, after releasing transfer  restrictions, the proposed merger  becomes
effective,  the  limited  partnership  must send  a  new  dissenters'  notice as
provided in  RCW  25.10.910(2)  and  25.10.920 and  repeat  the  payment  demand
procedure.
 
25.10.945  DISSENTER'S ESTIMATE OF FAIR VALUE -- NOTICE.
 
    (1)  A  dissenter  may notify  the  limited  partnership in  writing  of the
dissenter's own  estimate  of the  fair  value of  the  dissenter's  partnership
interest  and  amount of  interest due,  and demand  payment of  the dissenter's
estimate, less any payment under RCW 25.10.935, if:
 
        (a) The dissenter believes  that the amount paid  is less than the  fair
    value  of the dissenter's  partnership interest or that  the interest due is
    incorrectly calculated;
 
        (b) The  limited partnership  fails to  make payment  within sixty  days
    after the date set for demanding payment; or,
 
        (c)  The limited partnership,  having failed to  effectuate the proposed
    merger, does not  release the transfer  restrictions imposed on  partnership
    interests as permitted by RCW 25.10.930 within sixty days after the date set
    for demanding payment.
 
    (2) A dissenter waives the right to demand payment under this section unless
the  dissenter notifies  the limited  partnership of  the dissenter's  demand in
writing under  subsection (1)  of  this section  within  thirty days  after  the
limited partnership made payment for the dissenter's partnership interest.
 
25.10.950  UNSETTLED DEMAND FOR PAYMENT -- PROCEEDING -- PARTIES -- APPRAISERS.
 
    (1)  If  a demand  for payment  under RCW  25.10.945 remains  unsettled, the
limited  partnership  shall  commence  a  proceeding  within  sixty  days  after
receiving  the payment demand and petition the court to determine the fair value
of the partnership  interest and  accrued interest. If  the limited  partnership
does  not commence the proceeding within the sixty-day period, it shall pay each
dissenter whose demand remains unsettled the amount demanded.
 
    (2) The limited partnership  shall commence the  proceeding in the  superior
court.  If the limited  partnership is a domestic  limited partnership, it shall
commence the proceeding in the county where its office is maintained as required
by RCW 25.10.040(1). If  the limited partnership is  a domestic corporation,  it
shall  commence  the proceeding  in the  county where  its principal  office, as
defined in RCW  23B.01.400(17), is located,  or if  none is in  this state,  its
registered  office under RCW 23B.05.010. If the limited partnership is a foreign
limited partnership or corporation without a registered office in this state, it
shall commence the proceeding in  the county in this  state where the office  of
the  domestic limited partnership maintained pursuant to RCW 25.10.040(1) merged
with the foreign limited partnership or foreign corporation was located.
 
    (3) The  limited  partnership shall  make  all dissenters  (whether  or  not
residents  of  this  state)  whose  demands  remain  unsettled  parties  to  the
proceeding as in an action against  their partnership interests and all  parties
must  be  served with  a copy  of the  petition. Nonresidents  may be  served by
registered or certified mail or by publication as provided by law.
 
    (4) The  limited partnership  may join  as  a party  to the  proceeding  any
partner  who claims to  be a dissenter  but who has  not, in the  opinion of the
limited partnership, complied with the provisions of this chapter. If the  court
determines  that  such partner  has  not complied  with  the provisions  of this
article, the partner shall be dismissed as a party.
 
                                      E-3
<PAGE>
    (5) The jurisdiction of  the court in which  the proceeding is commenced  is
plenary  and exclusive. The court may appoint  one or more persons as appraisers
to receive evidence and recommend decisions  on the question of fair value.  The
appraisers  have the  powers described  in the order  appointing them  or in any
amendment to it.  The dissenters are  entitled to the  same discovery rights  as
parties in other civil proceedings.
 
    (6)  Each dissenter made a  party to the proceeding  is entitled to judgment
for the  amount,  if any,  by  which  the court  finds  the fair  value  of  the
dissenter's  partnership interest, plus interest, exceeds the amount paid by the
limited partnership.
 
25.10.955  UNSETTLED DEMAND FOR PAYMENT -- COSTS -- FEES AND EXPENSES OF
COUNSEL.
 
    (1) The court in a proceeding commenced under RCW 25.10.950 shall  determine
all  costs of the proceeding, including the reasonable compensation and expenses
of appraisers appointed by the court.  The court shall assess the costs  against
the  limited partnership, except that the court may assess the costs against all
or some of the dissenters, in amounts  the court finds equitable, to the  extent
the  court finds the  dissenters acted arbitrarily, vexatiously,  or not in good
faith in demanding payment.
 
    (2) The court may also assess the  fees and expenses of counsel and  experts
for the respective parties, in amounts the court finds equitable:
 
        (a)  Against  the  limited  partnership  and  in  favor  of  any  or all
    dissenters if the court finds the limited partnership did not  substantially
    comply with the requirements of this article; or
 
        (b)  Against either the limited partnership  or a dissenter, in favor of
    any other party, if the court finds that the party against whom the fees and
    expenses are assessed acted arbitrarily,  vexatiously, or not in good  faith
    with respect to the rights provided by this article.
 
        (3)  If the court finds  that the services of  counsel for any dissenter
    were of substantial benefit to other dissenters similarly situated, and that
    the fees  for those  services should  not be  assessed against  the  limited
    partnership, the court may award to these counsel reasonable fees to be paid
    out of the amounts awarded the dissenters who were benefited.
 
                                      E-4
<PAGE>
                                    PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 20.  INDEMNIFICATION OF DIRECTORS AND OFFICERS
 
    Article  13 of the  Registrant's Certificate of  Incorporation provides that
directors of  the  Registrant shall  not  be liable  to  the Registrant  or  its
stockholders  for monetary damages for their conduct as directors to the fullest
extent permitted by the Delaware General Corporation Law ("Delaware Law") as  it
existed  at the time the Certificate of Incorporation was adopted, and as it may
thereafter be amended. Any amendment to or repeal of Article 13 shall apply only
to acts or omissions of directors occurring after such amendment or repeal.
 
    The Registrant's Bylaws provide that the Registrant shall indemnify and hold
harmless its  directors  and officers  to  the fullest  extent  permitted  under
Delaware  Law or  by any other  applicable law against  all litigation expenses,
judgments, fines  and  settlement  amounts incurred  in  connection  with  their
service  or status as directors and  officers. Such indemnification also extends
to liabilities arising from actions taken by directors or officers when  serving
at  the request of the  Registrant as a director,  officer, employee or agent of
another  corporation  or  of  a  partnership,  joint  venture,  trust  or  other
enterprise.
 
    Section  145  of  Delaware  Law,  as currently  in  effect,  sets  forth the
indemnification rights of directors and officers of Delaware corporations. Under
such provision, a director or officer of a corporation (i) shall be  indemnified
by  the corporation  for all expenses  of litigation or  other legal proceedings
when he or she is successful on the merits or otherwise, (ii) may be indemnified
by the  corporation for  the  expenses, judgments,  fines  and amounts  paid  in
settlement  of such litigation (other than a derivative suit), even if he or she
is not successful  on the merits,  if he  or she acted  in good faith  and in  a
manner  he  or she  reasonably believed  to be  in  or not  opposed to  the best
interests of the corporation (and, in the case of a criminal proceeding, had  no
reason to believe his or her conduct was unlawful), and (iii) may be indemnified
by  the  corporation  for  the  expenses  of a  derivative  suit  (a  suit  by a
stockholder alleging a breach by a director or an officer of a duty owed to  the
corporation),  even if he or she  is not successful on the  merits, if he or she
acted in good faith and in  a manner he or she  reasonably believed to be in  or
not  opposed to  the best  interests of the  corporation, provided  that no such
indemnification may be made in accordance with this clause (iii) if the director
or officer is  adjudged liable  to the  corporation, unless  a court  determines
that,  despite such adjudication but in view of all the circumstances, he or she
is fairly  and reasonably  entitled  to indemnification  of such  expenses.  The
indemnification  described in  clauses (ii) and  (iii) above shall  be made only
upon a determination by (A) a  majority of a quorum of disinterested  directors,
(B)  independent legal  counsel in a  written opinion, or  (C) the stockholders,
that indemnification is proper  because the applicable  standard of conduct  has
been met.
 
    The  effect of the indemnification provisions  contained in the Bylaws is to
require  the  Registrant   to  indemnify  its   directors  and  officers   under
circumstances where such indemnification would otherwise be discretionary and to
extend  to the Registrant's directors and  officers the benefits of Delaware Law
dealing with director and officer indemnification, as well as any future changes
that might occur under Delaware Law in this area.
 
    The Bylaws state that the indemnification rights granted thereunder are  not
exclusive  of any other indemnification rights  to which the director or officer
may otherwise be entitled. As permitted  by Section 145(g) of Delaware Law,  the
Bylaws  also  authorize  the  Registrant  to  purchase  directors  and  officers
insurance for the benefit of its directors and officers, irrespective of whether
the Registrant has the power to  indemnify such persons under Delaware Law.  The
Registrant currently maintains such insurance as allowed by these provisions.
 
                                      II-1
<PAGE>
ITEM 21.  EXHIBITS
 
<TABLE>
<CAPTION>
  EXHIBIT
    NO.                                                  DESCRIPTION
- -----------  ----------------------------------------------------------------------------------------------------
<C>          <S>
       2.1   Acquisition  Agreement dated July 1, 1996, by and among Shurgard Storage Centers, Inc., IDS/Shurgard
              Income Growth Partners L.P.,  IDS/Shurgard Income Growth Partners  L.P. II and IDS/Shurgard  Income
              Growth  Partners L.P. III (incorporated by reference  to the Registrant's Schedule 14D-1 filed with
              the Commission on July 2, 1996)
 
       5.1   Opinion of Latham & Watkins regarding legality of shares*
 
       8.1   Opinion of Perkins Coie regarding tax matters*
 
      23.1   Consent of Latham & Watkins (contained in Exhibit 5.1)*
 
      23.2   Consent of Perkins Coie (contained in Exhibit 8.1)*
 
      23.3   Consent of Robert A. Stanger & Co., Inc. (Appraisal and Fairness Opinion)
 
      23.4   Consent of Alex. Brown & Sons Incorporated
 
      23.5   Consent of Deloitte & Touche
 
      24.1   Power of Attorney (contained on signature page)
 
      99.1   Form of proxy card for IDS/Shurgard Income Growth Partners L.P.*
 
      99.2   Form of proxy card for IDS/Shurgard Income Growth Partners L.P. II*
 
      99.3   Form of proxy card for IDS/Shurgard Income Growth Partners L.P. III*
</TABLE>
 
- ------------------------
* To be filed by amendment.
 
ITEM 22.  UNDERTAKINGS
 
    (a) The undersigned Registrant hereby undertakes:
 
        (1) To file, during any period in which offers or sales are being  made,
    a post-effective amendment to this Registration Statement:
 
           (i)  To include  any prospectus required  by Section  10(a)(3) of the
       Securities Act of 1933, as amended (the "Securities Act");
 
           (ii) To reflect in the prospectus  any facts or events arising  after
       the  effective date  of this Registration  Statement (or  the most recent
       post-effective amendment thereof) that, individually or in the aggregate,
       represent a  fundamental change  in  the information  set forth  in  this
       Registration Statement; and
 
          (iii)  To include any material information with respect to the plan of
       distribution not previously disclosed  in this Registration Statement  or
       any material change to such information in this Registration Statement;
 
    PROVIDED,  HOWEVER, that subparagraphs (a)(1)(i) and (a)(1)(ii) do not apply
    if the information required to be included in a post-effective amendment  by
    those  paragraphs  is  contained  in  the  periodic  reports  filed  with or
    furnished to  the  Securities  and Exchange  Commission  by  the  Registrant
    pursuant  to Section 13 or  Section 15(d) of the  Securities Exchange Act of
    1934, as amended (the "Exchange Act"), that are incorporated by reference in
    this Registration Statement.
 
        (2) That, for the purpose of  determining any under the Securities  Act,
    each  such post-effective amendment shall be deemed to be a new registration
    statement relating to  the securities  offered herein, and  the offering  of
    such  securities at that  time shall be  deemed to be  the initial bona fide
    offering thereof; and
 
                                      II-2
<PAGE>
        (3) To remove from registration  by means of a post-effective  amendment
    any of the securities being registered that remain unsold at the termination
    of the offering.
 
    (b)  The  undersigned Registrant  hereby  further undertakes  that,  for the
purposes of determining any liability under  the Securities Act, each filing  of
the Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the
Exchange  Act that is  incorporated by reference  in this Registration Statement
shall be deemed to  be a new registration  statement relating to the  securities
offered herein, and the offering of such Securities at that time shall be deemed
to be the initial bona fide offering thereof.
 
    (c)  Insofar as indemnification for liabilities arising under the Securities
Act may  be permitted  to directors,  officers and  controlling persons  of  the
Registrant  pursuant to  the provisions under  Item 20 above,  or otherwise, the
Registrant has  been  advised  that  in  the  opinion  of  the  Commission  such
indemnification  is against public policy as expressed in the Securities Act and
is, therefore,  unenforceable. In  the event  that a  claim for  indemnification
against  such liabilities (other than the  payment by the Registrant of expenses
incurred or paid by a director, officer or controlling person of the  Registrant
in the successful defense of any action, suit or proceeding) is asserted by such
director,  officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been settled  by controlling  precedent, submit  to a  court of  appropriate
jurisdiction  the question whether such indemnification  by it is against public
policy as expressed  in the Securities  Act and  will be governed  by the  final
adjudication of such issue.
 
                                      II-3
<PAGE>
                                   SIGNATURES
 
    Pursuant  to the requirements of the  Securities Act of 1933, the Registrant
has duly caused this Registration  Statement to be signed  on its behalf by  the
undersigned,  thereunto  duly  authorized,  in the  City  of  Seattle,  State of
Washington, on the 10th day of July, 1996.
 
                                          SHURGARD STORAGE CENTERS, INC.
 
                                          By /s/ HARRELL L. BECK
 
                                             -----------------------------------
                                             Harrell L. Beck
                                             SENIOR VICE PRESIDENT, CHIEF
                                             FINANCIAL OFFICER
                                              AND TREASURER
 
                               POWER OF ATTORNEY
 
    Each person whose  signature appears below  hereby constitutes and  appoints
Kristin  H. Stred and Harrell L. Beck, or any one of them, his attorneys-in-fact
and agents, each with full powers of substitution and resubstitution for him  in
any  and  all  capacities,  to  sign any  or  all  amendments  or post-effective
amendments to this Registration Statement, and  to file the same, with  exhibits
thereto  and other documents  in connection therewith or  in connection with the
registration of the Common Stock under  the Securities Exchange Act of 1934,  as
amended, with the Securities and Exchange Commission, granting unto each of such
attorneys-in-fact and agents full power and authority to do and perform each and
every  act and thing requisite and necessary in connection with such matters and
hereby ratifying  and confirming  all that  each of  such attorneys-in-fact  and
agents  or his or  her substitute or substitutes  may do or cause  to be done by
virtue hereof.
 
    Pursuant  to  the  requirements  of   the  Securities  Act  of  1933,   this
Registration  Statement  has  been  signed  by  the  following  persons  in  the
capacities and on the dates indicated.
 
             SIGNATURE                         TITLE                  DATE
- -----------------------------------  -------------------------  ----------------
 
       /s/ CHARLES K. BARBO          Chairman of the Board,
- -----------------------------------   President and Chief        July 10, 1996
         Charles K. Barbo             Executive Officer
 
        /s/ HARRELL L. BECK          Senior Vice President,
- -----------------------------------   Chief Financial Officer,   July 10, 1996
          Harrell L. Beck             Treasurer and Director
 
        /s/ DONALD W. LUSK
- -----------------------------------  Director                    July 10, 1996
          Donald W. Lusk
 
       /s/ WENDELL J. SMITH
- -----------------------------------  Director                    July 10, 1996
         Wendell J. Smith
 
        /s/ HOWARD JOHNSON
- -----------------------------------  Director                    July 10, 1996
          Howard Johnson
 
        /s/ GREENLAW GRUPE
- -----------------------------------  Director                    July 10, 1996
          Greenlaw Grupe
 
                                      II-4

<PAGE>
                                                                    EXHIBIT 23.3
 
- --------------------------------------------------------------------------------
                                                               1129 Broad Street
                                                       Shrewsbury, NJ 07702-4314
ROBERT A. STANGER & CO., INC.
                                                                  (908) 389-3600
                                                             FAX: (908) 389-1751
 FINANCIAL AND MANAGEMENT CONSULTANTS
                                                                  (908) 544-0779
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
CONSENT OF ROBERT A. STANGER & CO., INC.
 
    We  hereby consent to  (i) the inclusion of  our Summary Portfolio Appraisal
Report  and  opinion  letter  to  IDS/Shurgard  Income  Growth  Partners   L.P.,
IDS/Shurgard  Income  Growth Partners  L.P.  II and  IDS/Shurgard  Income Growth
Partners L.P. III as Appendix B and Appendix C to the Proxy Statement/Prospectus
of Shurgard Storage Centers,  Inc. ("SSCI") which is  part of this  Registration
Statement  on Form S-4, and  (ii) all references made to  our firm in such Proxy
Statement/Prospectus. In  giving such  consent, we  do not  admit that  we  come
within  the category of persons  whose consent is required  under, and we do not
admit and we  disclaim we are  experts for  purposes of, the  Securities Act  of
1933, as amended, and the rules and regulations promulgated thereunder.
 
Very truly yours,
 
ROBERT A. STANGER & CO., INC.
 
July 1, 1996

<PAGE>
                                                                    EXHIBIT 23.4
 
                                     [LOGO]
 
                                  July 9, 1996
 
    We  hereby consent to (i) the inclusion of our opinion letter to the Special
Committee of the Board of Directors  of Shurgard Storage Centers, Inc.  ("SSCI")
as  Appendix D  to the  Proxy Statement/  Prospectus of  SSCI, which  is part of
SSCI's Registration Statement on Form S-4,  and (ii) all references made to  our
firm in such Proxy Statement/Prospectus. In giving such consent, we do not admit
that we come within the category of persons whose consent is required under, and
we  do not admit and we disclaim we  are experts for purposes of, the Securities
Act of 1933, as amended, and the rules and regulations promulgated thereunder.
 
Very truly yours,
 
ALEX. BROWN & SONS INCORPORATED

<PAGE>
                                                                    EXHIBIT 23.5
 
                         INDEPENDENT AUDITORS' CONSENT
 
    We  consent to  the use in  this Registration Statement  of Shurgard Storage
Centers, Inc. on Form S-4 of our report dated February 2, 1996, incorporated  by
reference  in the Annual Report  on Form 10-K of  Shurgard Storage Centers, Inc.
for the year  ended December  31, 1995, and  to the  use of our  reports on  the
financial  statement of  IDS/Shurgard Income Growth  Partners L.P., IDS/Shurgard
Income Growth Partners L.P. II and IDS/Shurgard Income Growth Partners L.P.  III
for each of the three years in the period ended December 31, 1995 dated March 1,
1996,  appearing  in  the  Proxy Statement/Prospectus,  which  is  part  of this
Registration Statement.
 
    We also consent to the reference to  us under the heading "Experts" in  such
Proxy Statement/ Prospectus.
 
DELOITTE & TOUCHE LLP
 
Seattle, Washington
July 10, 1996


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