MISSION WEST PROPERTIES
                               10050 Bandley Drive
                           Cupertino, California 95014
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                          NOTICE OF SPECIAL MEETING OF
                           SHAREHOLDERS TO BE HELD ON
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TO THE SHAREHOLDERS:

     A  special   meeting  (the  "Meeting")  of  shareholders  of  Mission  West
Properties,  a  California  corporation  (the  "Company")  will  be  held at the
Company's corporate offices, 10050 Bandley Drive, Cupertino, California 95014 on
___________, _____________, 199_ at ____ _.m., for the following purposes:

     1. To approve a  proposed  private  placement  of  6,495,058  shares of the
Company's Common Stock for $4.50 per share.

   
     2. To ratify and  approve the  Company's  acquisition  of the sole  general
partner  interest  representing  approximately  12.11% of the total  partnership
interests  in each of  four  existing  limited  partnerships  (collectively  the
"Operating Partnerships") owning approximately 4.34 million rentable square feet
of leased commercial R&D buildings,  in which the principal limited partners are
Carl E.  Berg  and  certain  of his  affiliates,  pursuant  to the  terms  of an
Acquisition  Agreement  dated as of May 14, 1998 and an Amendment to Acquisition
Agreement effective July 1, 1998.
    

     3. To approve the Company's  acquisition  of the right to acquire,  through
the Operating Partnerships, certain pending commercial R&D building developments
consisting of approximately  1.02 million rentable square feet from Mr. Berg and
certain of his affiliates.

     4. To approve  the  Company's  acquisition  of an option to acquire  future
commercial  R&D building  developments  on land  currently  held by Mr. Berg and
certain of his affiliates.

   
     5. To approve the issuance of up to 93,398,705  shares of Common Stock upon
the future  redemption  or exchange of 93,398,705  units of limited  partnership
interests  held  by or  issuable  to  the  limited  partners  in  the  Operating
Partnerships ("L.P.  Units"),  including 33,919,072 L.P. Units issuable upon the
acquisition of the pending  commercial R&D building  developments  from Mr. Berg
and certain of his affiliates.
    

     6. To approve a proposal to reincorporate the Company under the laws of the
State of Maryland  through a merger  with and into the  Company's  wholly  owned
subsidiary  Mission  West  Properties,  Inc., a Maryland  corporation  ("Mission
West-Maryland"),  which  during  1998  intends to elect to become a Real  Estate
Investment  Trust ("REIT") for federal  income tax purposes,  and to approve the
adoption of the charter and bylaws of Mission  West-Maryland to take effect upon
the merger (the "Reincorporation Merger").

     Only  shareholders  of record at the close of business on _________,  1998,
will be entitled to vote at the meeting. Each of those shareholders is cordially
invited to be present and vote at the meeting in person.

WHETHER OR NOT YOU PLAN TO ATTEND THE MEETING, PLEASE SIGN AND DATE THE ENCLOSED
PROXY AND RETURN IT PROMPTLY. THIS IS IMPORTANT BECAUSE A MAJORITY OF THE SHARES
MUST BE REPRESENTED,  EITHER IN PERSON OR BY PROXY,  TO CONSTITUTE A QUORUM.  IF
YOU ATTEND THE MEETING,  YOU MAY VOTE IN PERSON EVEN THOUGH YOU HAVE  PREVIOUSLY
PROVIDED A PROXY.

                                       By Order of the Directors


                                       Bradley A. Perkins