SCHEDULE 14A INFORMATION
                                   PROXY STATEMENT


                     Pursuant to Section 14(a) of the Securities
                      Exchange Act of 1934 (Preliminary Filing)

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



/X/ Filed by the Registrant
/ / Filed by a party other than the Registrant

/ / Preliminary proxy statement, as amended
/ / Definitive proxy statement
/X/ Definitive additional materials
/ / Soliciting material pursuant to Rule 14a-11(c) or Rule 14a-12



                               MISSION WEST PROPERTIES
                                     (Registrant)

                            Commission File Number 1-8383




Payment of filing fee:

/ / $125 per Exchange Act Rule 0-11(c)(1)(ii), 14a-6(i)(1), or 14a-6(j)(2)
/ / $500 per each party to the controversy pursuant to Exchange Act Rule 
    14a-6(i)(3)
/ / Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and 0-11
    (1)  Title of each class of securities to which transaction applies: N/A
                                                                         -------
    (2)  Aggregate number of securities to which transactions applies: N/A
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    (3)  Per unit price or other underlying value of transaction computed
         pursuant to Exchange Act Rule 0-11: 

    (4)  Proposed maximum aggregate value of transaction: 

/ / Check box if any part of the fee is offset as provided by Exchange Act Rule
    0-11(a) and identify the filing for which the offsetting fee was paid
    previously.  Identify the previous filing by registration statement number,
    or the form or schedule and the date of its filing
    (1)  Amount previously paid:
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    (2)  Form, schedule or registration statement no.:
                                                        ------------------------
    (3)  Filing party:
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    (4)  Date filed:
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                             MISSION WEST PROPERTIES
                         6815 Flanders Drive, Suite 250
                        San Diego, California 92121-3914


                            ________________________

                         SUPPLEMENTAL PROXY INFORMATION 
                                       AND
                            NOTICE OF ADJOURNMENT OF
                         SPECIAL MEETING OF SHAREHOLDERS
                            ________________________


INTRODUCTION

Shareholders of Mission West Properties (the "Company") have previously been
supplied with a Notice of Special Meeting of Shareholders and a Proxy Statement
dated November 7, 1996.  This previously distributed proxy information detailed
a transaction in which the Company proposed to sell all or substantially all of
its real estate assets to Lincoln Property Company N.C., Inc. ("Lincoln").  The
transaction with Lincoln was scheduled to be put to a vote of the Company's
shareholders at a Special Meeting to be held December 7, 1996, which meeting was
adjourned to December 16, 1996, as noted below.

On December 6, 1996, the Company terminated the transaction to sell to Lincoln
pursuant to the terms of the agreement with Lincoln (the "Lincoln Agreement")
and entered into an Agreement of Purchase and Sale and Joint Escrow Instructions
(the "Spieker Agreement") by and among Spieker Properties, L.P. (the "Purchaser"
or "Spieker"), the Company, and Mission West Executive Aircraft Center, Inc., a
wholly owned subsidiary of the Company ("MW Aircraft Center") (the Company and
MW Aircraft Center collectively, the "Company" or "Seller"), pursuant to which
the Company proposes to sell all of its real estate assets (the "Assets") to the
Purchaser for a purchase price of $50,500,000 in cash (the "Spieker
Transaction").  

The terms of the proposed Spieker Transaction are similar in most respects to
those proposed under the Lincoln transaction, except for enhanced economic
terms.  The information contained in this Supplemental Proxy Information,
therefore, reflects only those items that are materially different from the
proposed Lincoln transaction (PLEASE REFER TO THE NOTICE OF MEETING AND PROXY
STATEMENT DATED NOVEMBER 7, 1996 PREVIOUSLY DISTRIBUTED).

ADJOURNMENT OF SHAREHOLDER MEETING

The Special Meeting of Shareholders noticed for December 7, 1996 has been
adjourned to Monday, December 16, 1996 at 9:00 a.m. at the executive offices of
the Company, 6815 Flanders Drive, Suite 250, San Diego, California.

PARTIES TO THE SPIEKER TRANSACTION

The Purchaser, a California limited partnership, is 83-percent owned by Spieker
Properties, Inc., a public corporation listed on the New York Stock Exchange
(trading symbol "SPK").  The Purchaser is a real estate investment trust that
owns and operates a portfolio of 128 income-producing office, industrial, and
retail properties primarily located in California and the Pacific Northwest. 
The Purchaser's principal executive offices are located at 2180 Sand Hill Road,
Suite 200, Menlo Park, California.  The purchaser's telephone number is (415)
854-5600.

There is no affiliation between the Company and the Purchaser.

   THIS MATERIAL SUPPLEMENTS THE PROXY STATEMENT DATED NOVEMBER 7, 1996


ADDITIONAL BACKGROUND AND REASONS FOR THE SPIEKER TRANSACTION

Following execution of the Lincoln Agreement, but in compliance with the terms
thereof, the Company furnished information to third parties who expressed an
interest in pursuing a purchase of the Assets.  Noting that several parties were
potentially interested in making, or had already made, offers to purchase the
Assets for consideration that would result in net proceeds to the Company of an
amount in excess of that offered by the Lincoln Agreement, the Company notified
Lincoln and discussed with Lincoln representatives a potential increase in the
consideration offered by Lincoln.  Thereafter, on December 3, 1996 the Company
advised Lincoln and two (2) parties that had made offers to purchase the Assets
that "best and final" offers to purchase the Assets should be received by the
Company at or before 5:00 p.m. on December 5, 1996 (two (2) days before a
planned shareholder meeting at which action would be taken to commit the Company
irretrievably to the Lincoln Agreement).  The Company also advised the
participants in the "best and final" process that it would entertain proposals
that did not contain a "fiduciary out" provision in order to bring finality to
the process, and requested an increased deposit and a reduced value attributable
to the MW Aircraft Center.  A third party made an offer for the Assets on
December 4, 1996 and was advised of the "best and final" procedure thereafter.

Pursuant to the terms of a "fiduciary out" provision in the Lincoln Agreement,
the Board could terminate that agreement and pursue a third party offer without
breaching the Lincoln Agreement if (i) the Board determined that the terms of
the third party offer were economically superior to the transaction contemplated
by the Lincoln Agreement, (ii) as a result, in the opinion of the Company's
legal counsel, the Board had a fiduciary duty to accept the third party offer,
and (iii) the Company paid Lincoln a "break-up" fee of up to $1,000,000 (in
addition to a break-up fee of up to $2,000,000 that would be due DMB/SVP
California Investments, LLC ("DMB/SVP") under a previous agreement).  Of this
amount, $150,000 was payable to Lincoln immediately as reimbursement for costs
incurred in performing its due diligence review of the Assets; the balance of
$850,000 (and $1,850,000 to DMB/SVP) will be due if a sale of Assets or sale of
the Company to a third party is completed.

Each of the three (3) parties, as well as Lincoln, submitted revised offers to
purchase the Assets consistent with the "best and final" process.  After the
5:00 p.m. deadline, but prior to a December 6, 1996 Board meeting, Lincoln
increased its offer by an additional amount.  The Board met on December 6, 1996
to consider all offers received.  The Board concluded, in part based upon the
advice of its financial advisor, that the Spieker offer was the best offer for
purchase of the Assets available to the Company in view of all relevant
circumstances.  Based upon this conclusion, legal counsel advised the Board that
it had a fiduciary duty to accept the offer from Spieker.  The Board authorized
management to give the "fiduciary out" notice to Lincoln and to execute and
deliver the Spieker Agreement on behalf of the Company.  Subsequently, two (2)
participants in the "best and final" process increased, or purported to
increase, their offers for the Assets.

The Board of Directors has determined unanimously that the Spieker Transaction
under the terms of the Spieker Agreement is in the best interests of the Company
and its shareholders.  In making this determination, the Board considered the
months of effort during which management and its advisors entertained
discussions with numerous parties concerning various potential transactions, the
expressions of interest received in certain instances, the agreements reached
with DMB/SVP and then Lincoln, independent advice with respect to valuation of
the Company's properties and the pricing of the Purchaser's offer, as well as an
opinion dated December 6, 1996 from the Company's financial advisor (in the same
form previously delivered to the Board) that the Spieker Transaction is fair to
the Company's shareholders from a financial point of view.  In addition, the
Board considered the financial resources of Spieker and its affiliates and the
likelihood it would be able to close the Spieker Transaction.

OPINION OF FINANCIAL ADVISOR

The Company's financial advisor, Slusser Associates, Inc. has rendered its
opinion that the proposed Spieker Transaction is fair to the Company's
shareholders from a financial point of view.

SUMMARY OF MATERIALLY DIFFERENT TERMS OF THE SPIEKER AGREEMENT

CLOSING:  The Closing is scheduled to occur in late December 1996 or early
January 1997, subject to extension in certain cases by both parties, but in no
event shall the Closing occur after March 31, 1997.  If the Spieker Transaction
is not closed by June 27, 1997, DMB/SVP has the option to proceed with a
purchase of the Assets under the terms of their previous agreement.

                                      - 2 -


PURCHASE PRICE:  The purchase price for the Assets being sold is $50,500,000,
payable in cash at the Closing.  The Company will satisfy the secured
indebtedness related to the Assets, estimated to be $30,750,000 at the time of
closing, as well as any portion of the $3,000,000 "break-up" fees due to Lincoln
and DMB/SVP, from the proceeds of the purchase price.  There will be no
reduction in purchase price for soils and structural repairs to any of the
Company's properties.  Contingencies related to the MW Aircraft Center remain;
however, the price at which the MW Aircraft Center may be excluded from the
Spieker Transaction at the end of a 90-day period has been reduced to
$3,000,000.

ESCROW ACCOUNT:  The Company and the Purchaser have opened an escrow account
with First American Title Insurance Company (the "Escrow Holder").  The
Purchaser has placed $3,000,000 on deposit with the Escrow Holder and has paid
the Company $150,000 as consideration for executing the Spieker Agreement.  Of
the deposit amount, $300,000 is specifically allocated to the MW Aircraft Center
leasehold properties.
  
TERMINATION:  There are no provisions for termination of the Spieker Agreement
under a "fiduciary out" or any related "break-up" fee.

FEDERAL INCOME TAX CONSEQUENCES

The sale of Assets contemplated by the Spieker Agreement will constitute a
taxable disposition of assets for federal income tax purposes and will result in
a tax gain to the Company.  The amount of gain will be determined upon Closing. 
This gain will represent the difference between the tax bases of the Assets and
the net proceeds from the sale and is anticipated to be approximately
$4,600,000.

OPERATION OF THE COMPANY AFTER THE CLOSING

Upon the Closing, after satisfying its accrued liabilities, the Company will
have net assets of approximately $17,000,000, consisting primarily of cash and
cash equivalents, and no operating assets.  After the Closing, the Company
intends to consider making a substantial dividend distribution to shareholders;
the Company will then review available strategic alternatives, which may include
business or asset acquisitions, a sale of the Company, or outright liquidation.

STOCK PRICE

The Company's Common Stock is listed on the American and Pacific Stock
Exchanges.  On December 5, 1996, the last trading day prior to the public
announcement of the proposed sale of Assets, the high, low, and closing sales
price of the Company's Common Stock was $9.875 per share.

   THE DATE OF THIS SUPPLEMENTAL PROXY INFORMATION IS DECEMBER 7, 1996