MISSION WEST PROPERTIES

                       RESTRICTED STOCK PURCHASE AGREEMENT


THIS AGREEMENT is made and entered into as of March 30, 1998, between Mission 
West Properties, a California corporation (the "Company") and Michael J. 
Anderson ("Purchaser").

                                R E C I T A L S:

A. Pursuant to the exercise of a stock option (the "Option") granted to 
Purchaser by the Company under the Stock Option Agreement dated March 30, 
1998 (the "Option Agreement"), Purchaser has elected to purchase Two Hundred 
Thousand (200,000) shares of the Company's Common Stock (the "Shares").

B. Purchaser is a key employee of the Company. The securities described in 
this Agreement are being offered and sold pursuant to a written compensatory 
benefit plan of the Company.

NOW, THEREFORE, in consideration of the mutual covenants exchanged, the 
parties agree as follows:

1. PURCHASE AND SALE OF SHARES.

     (a) PURCHASE AND SALE OF SHARES. The Company agrees to sell to 
     Purchaser, and Purchaser agrees to purchase from the Company, Two 
     Hundred Thousand (200,000) shares of the Company's Common Stock (the 
     "Shares"), at a purchase price of Four Dollars and Fifty Cents ($4.50) 
     per share, for a total purchase price of Nine Hundred Thousand Dollars 
     ($900,000). All of the Shares shall be subject to this Agreement and the 
     restrictions herein contained.

     (b) CLOSING. The purchase and sale of the Shares shall be held at the 
     principal office of the Company on the date hereof, or at such other 
     time and place as shall be mutually agreed between Purchaser and the 
     Company. At the closing, Purchaser shall deliver to the Company the 
     total purchase price for the Shares paid in a form and manner authorized 
     by the Option Agreement, and the Company will issue, as promptly  
     thereafter as practicable, a certificate representing the Shares issued 
     in the name of Purchaser. In the event Purchaser delivers his Promissory 
     Note in the form attached hereto as Exhibit A in payment of the purchase 
     price, the following shall apply:

          (i) Purchaser shall assign, transfer and pledge the Shares, or 
          collateral of equivalent value acceptable to the Company, to the 
          Company as security for payment of the Promissory Note in 
          accordance with the provisions of a Security Agreement in the form 
          of Exhibit B attached hereto.

               (ii) In the event Purchaser's employment by the Company is 


               terminated for any reason whatsoever, including death, the 
               Company shall have the right, upon ninety (90) days' prior 
               written notice to Purchaser, or his legal representative or 
               successor, to accelerate the full payment of the Promissory 
               Note, in which event such payment shall be due and payable to 
               the Company within thirty (30) days after the expiration of 
               the ninety (90)-day period, unless Purchaser is in default 
               under the Promissory Note or the Security Agreement on the 
               date such notice is sent. In the event of such default, the 
               provisions regarding acceleration of payment due under the 
               Promissory Note contained in Section 6 of the Security 
               Agreement shall apply.

2. REPURCHASE OPTION.

     (a) SHARES SUBJECT TO REPURCHASE. Purchaser hereby grants to the Company 
     the option (the "Repurchase Option") to repurchase all or part of the 
     Unvested Shares (as defined in Section 2(b) below) at the price per 
     share paid for them by Purchaser (the "Option Price"), subject to 
     adjustment pursuant to Section 3, upon the occurrences set forth in 
     subSection (c), but only to the extent such Shares have not been 
     released from the Repurchase Option as provided in subSection (b). All 
     of the Shares shall initially be subject to the Repurchase Option.

     (b) RELEASE DATES. The Shares subject to the Repurchase Option shall be 
     released from the Repurchase Option in accordance with the vesting 
     schedule set forth in Section 3(a) of the Option Agreement to the extent 
     and as of the dates provided therein. Shares subject to the Repurchase 
     Option are referred to herein as "Unvested Shares," and Shares which 
     have been released from the Repurchase Option are referred to herein as 
     "Vested Shares."

     (c) OCCURRENCES  PERMITTING EXERCISE.  The Company may exercise the 
     Repurchase Option if during the term of this Agreement any one of the 
     following events (an "Offering Event") takes place: (i) Purchaser shall 
     cease to be employed by the Company (including a Parent or Subsidiary of 
     the Company) for any reason, or no reason, with or without cause, 
     including involuntary termination, death or disability; or (ii) any 
     event occurs which causes the involuntary transfer to creditors or to 
     any other person or entity of all or any part of the Shares still 
     subject to the Repurchase Option at the time of such transfer; or (iii) 
     upon designation by the Company in writing to Purchaser, any 
     acceleration of payment due as provided under the terms of the 
     Promissory Note.

     (d) EXERCISE OF REPURCHASE OPTION. Upon the occurrence of an Offering 
     Event, the Company may exercise the Repurchase Option by delivering 
     personally, or by registered or certified mail, to Purchaser (or the 
     Purchaser's permitted transferee or legal representative, as the case 
     may be), within ninety (90) days after the date of the Offering Event, a 
     notice in writing indicating the Company's election to exercise its 
     Repurchase Option and the number of Shares to be purchased by the 
     Company or the Company's designee, who shall be identified in such 
     notice, and setting forth a date for closing not later than thirty (30) 
     days from the date of giving such notice.

     (e) CLOSING FOR REPURCHASE OF SHARES. The closing for the repurchase of 
     the Shares pursuant to the exercise of the Repurchase Option shall take 
     place at the Company's principal offices. At the closing, the holder of 
     the 



     certificate(s) representing the Shares being transferred shall deliver 
     said certificate or certificates evidencing the Shares to the Company, 
     duly endorsed for transfer, and the Company (or its designee) shall 
     tender payment of the purchase price for the Shares being purchased. The 
     purchase price shall be payable in full in cash, or by check, provided 
     that the Company may elect to offset against and deduct from any payment 
     of the purchase price any indebtedness then owed by Purchaser to the 
     Company.

3. ADJUSTMENTS.

     (a) GENERAL. If, from time to time during the term of this Agreement: 
     (i) there is any stock dividend, distribution or dividend, stock split, 
     or other change in the character or amount of any of the outstanding 
     securities of the Company; or (ii) there is any consolidation, merger or 
     sale of all, or substantially all, of the assets of the Company; then in 
     such event, any and all new, substituted or additional securities, cash, 
     or other property to which Purchaser is entitled by reason of his 
     ownership of the Shares (the "New Consideration") shall be included in 
     the word "Shares" for all purposes with the same force and effect as the 
     Shares presently subject to the Repurchase Option and other terms of 
     this Agreement, and shall be subject to the Repurchase Option in the 
     same manner and to the same extent as the Unvested Shares with respect 
     to which the New Consideration was provided. While the total Option 
     Price shall remain the same after any such event,  the Option  Price per 
     share shall be appropriately adjusted to reflect any change in the 
     number of shares.

     (b) QUARTERLY DISTRIBUTIONS. Notwithstanding the provisions of 
     subsection (a) above to the contrary, Purchaser shall be entitled to 
     receive and retain dividends or other distributions declared on the 
     Common Stock of the Company by the board of directors quarterly or on 
     any other regular, periodic basis, including but not limited to 
     distributions required for compliance with the provisions of Section 
     857(a) of the Internal Revenue Code of 1986, as amended.

4. RESTRICTIONS ON TRANSFER.

     (a) NO TRANSFER OF SHARES SUBJECT TO REPURCHASE OPTION. Purchaser shall 
     not sell, transfer, pledge, assign or otherwise dispose of any of the 
     Unvested Shares which are subject to the Repurchase Option.

     (b) GIFTS OF SHARES. Notwithstanding any other term of this Section 4, 
     Purchaser may make a gift of all or any part of the Shares to any of 
     Purchaser's parents, spouse, issue, siblings, nephews or nieces or to a 
     trust for the exclusive benefit of any of the foregoing parties. The 
     donee or donees shall hold such Shares subject to all the provisions of 
     this Agreement.

5. ASSIGNMENT OF RIGHTS. The Company may assign its rights under Section 2 
hereof to one or more persons or entities, who shall have the right to so 
exercise such rights in his or its own name and for his or its own account. 
If any such transfer of the Shares requires the consent of any agency 
pursuant to the securities laws of any state, the time periods specified 
herein shall be extended for such period as the necessary request for consent 
to transfer is pending before such agency. All parties agree to cooperate in 
making such request for transfer, and no transfer shall be executed without 
such consent if required by law.



6. RELEASE OF SHARES FROM REPURCHASE OPTION. The number of Shares subject to 
the Repurchase Option will decline as set forth in Section 2(b), and the 
Repurchase Option shall terminate following the expiration of the notice 
specified in Section 2(d). Subject to the provisions of the Promissory Note 
and the Security Agreement, the Company shall release and deliver to 
Purchaser, from time to time as Purchaser may reasonably request, a 
certificate representing that number of Shares set forth in a written request 
made to the Secretary of the Company, to the extent that such Shares are no 
longer subject to the Repurchase Option. The Company shall cause new 
certificates to be issued as necessary to effectuate the release and delivery 
of such Shares to Purchaser.

7. LEGENDS.

     (a) ENDORSEMENT ON CERTIFICATES. The certificates representing the Shares
     subject to this Agreement shall be endorsed with a legend substantially in
     the following form:

          THE SHARES REPRESENTED BY THIS CERTIFICATE MAY BE TRANSFERRED ONLY 
          IN ACCORDANCE WITH THE TERMS OF A RESTRICTED STOCK PURCHASE 
          AGREEMENT BETWEEN THE COMPANY AND THE REGISTERED HOLDER OR HIS 
          PREDECESSOR IN INTEREST, A COPY OF WHICH IS ON FILE WITH THE 
          SECRETARY OF THE COMPANY. THE AGREEMENT MAY BE INSPECTED AT THE 
          PRINCIPAL OFFICE OF THE COMPANY DURING NORMAL BUSINESS HOURS.

     (b) TERMINATION OF ALL RESTRICTIONS. In the event the restrictions 
     imposed by this Agreement shall be terminated as herein provided, a new 
     certificate or certificates representing the Shares shall be issued, on 
     request, without the legend referred to in Subsection 7(a).

     (c) SECURITIES LAW LEGENDS. Any transfer or sale of the Shares is 
     further subject to all restrictions on transfer imposed by state or 
     federal securities laws. Accordingly, it is understood and agreed that 
     the certificates representing the Shares shall bear any legends required 
     by such state or federal securities laws.

8. PURCHASER'S REPRESENTATIONS. In connection with the purchase of the Shares,
Purchaser hereby represents and warrants to the Company as follows:

     (a) INVESTMENT INTENT; CAPACITY TO PROTECT INTERESTS.  Purchaser is 
     purchasing the Shares solely for his or her own account for investment 
     and not with a view to or for sale in connection with any distribution 
     of the Shares or any portion thereof and not with any present intention 
     of selling, offering to sell or otherwise disposing of or distributing 
     the Shares or any portion thereof in any transaction other than a 
     transaction exempt from registration under the Securities Act of 1933, 
     as amended (the "Act"). Purchaser also represents that the entire legal 
     and beneficial interest of the Shares is being purchased, and will be 
     held, for Purchaser's account only, and neither in whole or in part for 
     any other person. Purchaser either (i) has a pre-existing business or 
     personal relationship with the Company or any of its officers, directors 
     or controlling persons, or (ii) by reason of Purchaser's business or 
     financial experience or the business or financial  experience of  
     Purchaser's professional advisors who are unaffiliated with and who are 
     not compensated by the Company or any affiliate or selling agent of the 
     Company, directly or indirectly, could be reasonably assumed to have the 
     capacity to evaluate the merits and risks of an investment in the 
     Company and to protect Purchaser's own interests in connection with this 
     transaction.

     (b) INFORMATION CONCERNING COMPANY. Purchaser has heretofore discussed 
     the Company and its plans, operations and financial condition with the 
     Company's officers and has heretofore received all such information as 
     Purchaser has deemed necessary and appropriate to enable the Purchaser 
     to evaluate the financial risk inherent in making an investment in the 
     Shares. Purchaser has received satisfactory and complete information 
     concerning the business and financial condition of the Company in 
     response to all inquiries in respect thereof.

     (c) ECONOMIC RISK. Purchaser realizes that the purchase of the Shares 
     will be a highly speculative investment and involves a high degree of 
     risk, and Purchaser is able, without impairing his or her financial 
     condition, to hold the Shares for an indefinite period of time and to 
     suffer a complete loss of Purchaser's investment.

     (d) RESTRICTED SECURITIES. Purchaser understands and acknowledges that:

          (i) the sale of the Shares has not been registered under the Act, 
          and the Shares must be held indefinitely unless subsequently 
          registered under the Act or an exemption from such registration is 
          available and the Company is under no obligation to register the 
          Shares;

          (ii) the share certificate representing the Shares will be stamped
          with the legends specified in Section 7 hereof; and

          (iii) the Company will make a notation in its records of the 
          aforementioned restrictions on transfer and legends.

     (e) DISPOSITION UNDER RULE 144. Purchaser understands that the Shares 
     are restricted securities within the meaning of Rule 144 promulgated 
     under the Act; that unless the Shares have been issued pursuant to Rule 
     701 promulgated under the Act the exemption from registration under Rule 
     144 will not be available in any event for at least one year from the 
     date of purchase and payment of the Shares (AND THAT PAYMENT BY A NOTE 
     IS NOT DEEMED PAYMENT UNLESS IT IS SECURED BY ASSETS OTHER THAN THE 
     SHARES), and even then will not be available unless: (i) a public 
     trading market then exists for the Common Stock of the Company; (ii) 
     adequate information concerning the Company is then available to the 
     public; and (iii) other terms and conditions of Rule 144 are complied 
     with; and that any sale of the Shares may be made only in limited 
     amounts in accordance with such terms and conditions.

     (f) FURTHER LIMITATIONS ON DISPOSITION. Purchaser agrees that he shall not
     make any disposition of all or any portion of the Shares unless and until:

          (i) (A) There is then in effect a Registration Statement under the 
          Securities Act covering such proposed disposition and such 
          disposition is made in accordance with said Registration Statement; 
          OR, (B)(1) Purchaser shall have notified the Company of the 
          proposed disposition and shall have furnished the Company with a 
          detailed statement of the circumstances surrounding the proposed 
          disposition, (2) Purchaser shall have furnished the Company with an 
          opinion of the Purchaser's counsel to the effect that such  
          disposition will not require registration of such shares under the 
          Securities Act, AND (3) such opinion of Purchaser's counsel shall 
          have been concurred in by counsel for the Company and the Company 
          shall have advised Purchaser of such 



          concurrence; AND,

          (ii) The Shares proposed to be transferred are no longer subject to
          the Repurchase Option set forth in Section 2 hereof.

9. ESCROW. As security for his faithful performance of the terms of this 
Agreement and to ensure the availability for delivery of Purchaser's Shares 
upon exercise of the Repurchase Option herein provided for, Purchaser agrees 
to deliver to and deposit with Graham & James LLP, legal counsel to the 
Company (the "Escrow Agent"), as Escrow Agent in this transaction, two Stock 
Assignments duly endorsed (with date and number of Shares blank) in the form 
attached hereto as Exhibit C, together with the certificate or certificates 
evidencing the Shares; said documents are to be held by the Escrow Agent 
pursuant to the Joint Escrow Instructions of the Company and Purchaser set 
forth in Exhibit E attached hereto and incorporated by this reference, which 
instructions shall also be delivered to the Escrow Agent at the closing 
hereunder.

10. COMPLIANCE WITH INCOME TAX LAWS.

     (a) WITHHOLDING TAX. Purchaser authorizes the Company to withhold in 
     accordance with applicable law from any compensation payable to him or 
     her any taxes required to be withheld by Federal, state or local laws as 
     a result of the purchase of the Shares. Furthermore, in the event of any 
     determination that the Company has failed to withhold a sum sufficient 
     to pay all withholding taxes due in connection with the purchase of the 
     Shares, Purchaser agrees to pay the Company the amount of such 
     deficiency in cash within five (5) days after receiving a written demand 
     from the Company to do so, whether or not Purchaser is an employee of 
     the Company at that time.

     (b) INTEREST ON NOTE. In the event that any Promissory Note issued by 
     the Purchaser under this Agreement is subject to the provisions of 
     Section 1274 of the Internal Revenue Code of 1986, as amended (the 
     "Code"), and would have original issue discount subject to Section 1272 
     of the Code, the Company and the Purchaser agree to make and file a 
     timely election under Section 1274A(c) of the Code and regulations 
     thereunder to account for all of the interest on such Note on the cash 
     receipts and disbursements method for Federal income tax purposes.

11. ELECTION PURSUANT TO SECTION 83(B) OF INTERNAL REVENUE CODE OF 1986, AS 
AMENDED. Purchaser shall be responsible for filing with the Internal Revenue 
Service an appropriate written notice of election pursuant to Section 83(b) 
of the Code, if Purchaser wishes to make such an election. Purchaser shall 
notify the Company in writing if Purchaser files such an election within 
thirty (30) days of the date of the sale herein contemplated. The Company 
intends, in the event it does not receive from Purchaser evidence of such 
filing, to claim a tax deduction for any amount which would otherwise be 
taxable to Purchaser in the absence of such an election.

12. ENFORCEMENT. Purchaser agrees that a violation on his or her part of any of
the terms of this Agreement (other than those contained in Sections 12 and 13,
above) may cause irreparable damage to the Company, the exact amount of which is
impossible to ascertain, and for that reason agrees that the Company shall be
entitled to exercise its right to effect a repurchase and transfer of the Shares
pursuant to Section 2 hereof or to a decree of specific performance of the terms
hereof or an injunction restraining further violation, said right to be in
addition to any other remedies of said parties.

13. CONTROLLING PROVISIONS. The Shares are subject to the provisions of the 
Company's 1997 Stock Option Plan, and unless stated otherwise terms defined 
therein have the same meaning when used in this Agreement. To the extent that 
there may be any conflict between the provisions of this Agreement and the 
provisions contained in the Company's Bylaws on the transfer or restriction 
on transfer of Shares, the terms of this Agreement shall be controlling. This 
Agreement may not be modified except by a writing signed by the party to be 
bound.

14. OWNERSHIP, VOTING RIGHTS, DUTIES. This Agreement shall not affect in any 
way the ownership, voting rights or other rights or duties of Purchaser, 
except as specifically provided herein.

15. NOTICES. All notices and other communications required or permitted 
hereunder shall be in writing and shall be deemed effectively given upon 
personal delivery or on the day sent by facsimile transmission if a true and 
correct copy is sent the same day by first class mail, postage prepaid, or by 
dispatch by an internationally recognized express courier service.

16. BINDING EFFECT. This Agreement shall inure to the benefit of the Company 
and its successors and assigns and, subject to the restrictions on transfer 
set forth herein, be binding upon Purchaser, his permitted transferees, 
heirs, legatees, executors, administrators and legal successors, who shall 
hold the Shares subject to the terms hereof.

17. GOVERNING LAW. This Agreement, together with the exhibits hereto, shall 
be governed by and construed in accordance with the laws of the State of 
California, as such laws are applied to contracts entered into by residents 
of such state and performed in such state.

18. ENTIRE AGREEMENT. This Agreement supersedes all previous written or oral 
agreements between the parties regarding the subject matter hereof, and 
constitutes the entire agreement of the parties regarding such subject 
matter. This Agreement may not be modified or terminated except by a writing 
executed by all of the parties hereto.

19. NOT EMPLOYMENT CONTRACT. Nothing in this Agreement shall affect in any 
manner whatsoever the right or power of the Purchaser or the Company to 
terminate Purchaser's employment, for any reason or for no reason, with or 
without cause, subject to the provisions of applicable law. This Agreement is 
not an employment contract.

20. GENDER. The masculine, feminine or neuter pronouns used herein shall be 
interpreted without regard to gender.

21. COUNTERPARTS. This Agreement may be executed in counterparts, each of 
which shall be deemed to be an original, but all of which together shall 
constitute one and the same instrument.

22. SEVERABILITY. If any provision of this Agreement is held by a court of 
competent jurisdiction to be invalid, void or unenforceable, the remaining 
provisions shall nevertheless continue in full force and effect without being 
impaired or invalidated in any way and shall be construed in accordance with 
the purposes and tenor and effect of this Agreement.

IN WITNESS WHEREOF, the parties have executed this Agreement on the date 
first 



above written.

MISSION WEST PROPERTIES            PURCHASER


By:                                By:
   -------------------------           ---------------------------------
                                             Michael J. Anderson


Title:                              Address: 858 Fielding Drive,
      ----------------------                 Palo Alto, CA 94303