CERTIFICATE REGARDING DISTRIBUTION OF LOAN PROCEEDS
                             AND INDEMNITY AGREEMENT


      THIS  CERTIFICATE  is made  as of  September  22,  1998  by  MISSION  WEST
PROPERTIES, L.P., a Delaware limited partnership,  MISSION WEST PROPERTIES, L.P.
I, a Delaware limited partnership,  MISSION WEST PROPERTIES, L.P. II, a Delaware
limited partnership,  and MISSION WEST PROPERTIES,  L.P. III, a Delaware limited
partnership,  each having offices at 10050 Bandley Drive, Cupertino,  California
95014 (each a "Borrower" and collectively,  "Borrowers"), to and for the benefit
of THE  PRUDENTIAL  INSURANCE  COMPANY  OF  AMERICA,  a New  Jersey  corporation
("Prudential"),  in  conjunction  with a loan (the "Loan") made or to be made by
Prudential  to Borrowers  in the amount of One Hundred  Thirty  Million  Dollars
($130,000,000.00) as more particularly  described in that certain First Mortgage
Loan   Application   dated  June  24,  1998  and  executed  by  Borrowers   (the
"Application").

      This  Certificate  is  made  with  respect  to  the  following  facts  and
circumstances:

      A. The Loan is to be  evidenced by that  certain  Promissory  Note of even
date herewith (the "Note") in the principal amount of One Hundred Thirty Million
Dollars  ($130,000,000.00)  executed by Borrowers  as an  aggregate  loan to all
Borrowers as hereinafter described.

      B. The Note shall be secured by, among other things,  that certain Deed of
Trust,  Security  Agreement,  and Fixture  Filing with  Assignment  of Rents and
Proceeds of even date herewith  executed by Borrowers,  as Trustor,  in favor of
Prudential, as Beneficiary (the "Deed of Trust").  Capitalized terms used herein
and not  otherwise  defined  shall have the  meanings  given them in the Deed of
Trust.

      C. Borrowers have advised Prudential,  and Prudential has agreed,  subject
to the certifications,  warranties and representations of Borrowers contained in
this Certificate,  that Borrowers desire that the proceeds of the Loan allocated
to each Borrower be allocated  amongst the Borrowers,  but in an amount that (i)
neither  constitutes less than a substantial portion of the fair market value of
the Property of such  Borrower  that is being used as  collateral  for the Loan,
(ii) nor is more than 75% of the value of such  Property  as shown on  Exhibit A
attached  hereto.  Borrowers  understand and  acknowledge  that such  allocation
reflects the  commercial  benefits being received by each Borrower from the Loan
transaction as well as the equitable  allocation of Operating  Partnership Units
held by each Borrower at the time of Loan closing.

      D.  Borrowers  have  requested  that the Loan amount be encompassed in one
loan with a single set of Loan Documents  binding all Borrowers  notwithstanding
that the Loan  proceeds  are to be divided  amongst  Borrowers.  Prudential  has
agreed to allow  Borrowers  to borrow  the funds  using  this  structure  solely
because of Borrowers' request.

      E. On the basis of the foregoing  facts and  circumstances,  Prudential is
willing to make the Loan as requested by Borrowers,  but only in reliance on the
acknowledgments, representations and warranties of Borrowers contained herein.

      NOW,  THEREFORE,  in order to induce  Prudential to make the Loan,  and in
consideration  thereof and with the  understanding  that  Prudential  is relying
thereon, Borrowers hereby jointly and severally agree and certify as follows:

      1. LOAN STRUCTURE.  Borrowers acknowledge that, at Borrowers' request, the
Loan is  made in the  aggregate  to  Borrowers,  and is  evidenced  by and  made
pursuant  to the  Note,  and that the Note is or is to be  secured  by a deed of
trust to be  recorded in Alameda  County,  California  and Santa  Clara  County,
California. The Note provides for joint and several liability among Borrowers at
Borrowers'  request.  Borrowers  further  acknowledge  that  any  nonpayment  of
principal or interest,  including one resulting from one  Borrower's  failure to
pay any portion of the Note or any  installment  of  principal  or interest  due
thereunder,  may result in the Loan being  declared in  default,  and all unpaid
principal  under the Note  accelerated.  Without  limiting the generality of the
foregoing,  in such event all proceeds of the foreclosure sale of any Borrower's
property may be applied to satisfy the Note. Further, each Borrower acknowledges
and understands  that such  foreclosure  sale proceeds may be applied to satisfy
the Note even if the  value of such  Borrower's  property  is  greater  than the
portion of the Note that such  Borrower may be  responsible  for as agreed among
Borrowers. Borrowers have determined the allocation of Loan proceeds pursuant to
standards  set  forth  of the  Recitals  set  forth  in  PARAGRAPH  C above  and
Prudential  shall not be responsible  for the allocation of such proceeds of the
Loan among Borrowers.

      2. CERTAIN CONSEQUENCES OF LOAN STRUCTURE. Each Borrower has been informed
and  understands  that the  consequences  of becoming  obligated  under the Loan
Documents  that  secure  the  Loan  is that  each  Borrower's  respective  land,
improvements and other property is being encumbered as collateral for the entire
Loan. Each Borrower further  understands and has been informed that in the event
of a default  under the Loan,  all  Borrowers  must act together for purposes of
curing  any  defaults,  and  that  the  failure  to do so  could  result  in the
foreclosure and sale, and ultimate loss, of each Borrower's respective Property.

      3. ALLOCATION AND DISTRIBUTION OF THE PROCEEDS OF THE LOAN.

           (a)  Borrowers  hereby  acknowledge,  represent  and warrant that the
      proceeds of the Loan  allocated  to, and to be received by, each  Borrower
      shall be in an amount that (i) neither constitutes less than a substantial
      portion of the fair market value of the Property of such  Borrower that is
      being used as  collateral  for the Loan,  (ii) nor is more than 75% of the
      value of such Property as shown on EXHIBIT A attached  hereto.  The rights
      and  remedies  of  Prudential  under  the  Loan  Documents  shall  not  be
      diminished,  reduced or modified due to  allocation of the proceeds of the
      Loan among Borrowers.

           (b) Each  Borrower  agrees that up to a maximum  amount not to exceed
      its share of the Loan (per subsection (a)(ii)) and corresponding  interest
      and other expenses, it shall reimburse and indemnify and hold harmless the
      other Borrowers (each an  "Indemnitee")  for any claim,  loss,  liability,
      damage or expense suffered or paid by the Indemnitee  (including  payments
      of the Loan  and the loss of the  Indemnitee's  respective  property  as a
      result of the exercise of Prudential's  remedies under the Loan Documents)
      because (i) such Borrower  fails to make its  allocated  share of payments
      under the Loan (based on the  percentages  noted in  subsection  (a) above
      with respect to the Loan),  or (ii) at the time of foreclosure or transfer
      by deed in lieu of foreclosure,  the value of such Borrower's  property so
      foreclosed or transferred has declined  proportionately more (based on the
      percentages  noted in subsection  (a) above with respect to the Loan) than
      another  Indemnitee's   property  since  the  date  of  this  Certificate.
      Borrowers  shall  be  entitled  to set off  claims  related  to this  Loan
      transaction  against one  another so that the  aggregate  obligation  of a
      Borrower  shall not exceed the maximum  amount  provided in the  preceding
      sentence.   Nothing   contained  in  this  Agreement  shall  diminish  the
      obligations  of  each  Borrower  to  indemnify  the  General   Partner  in
      accordance  with  the  terms  of  such  Borrower's   limited   partnership
      agreement.

      4. REPRESENTATIONS  REGARDING LOAN STRUCTURE AND TERMS.  Borrowers jointly
and severally  represent and warrant to Prudential that Borrowers have requested
that the Loan be made upon the following terms and  acknowledge  that Prudential
has agreed to such terms only on account of Borrowers' request to do so:

           (a) The  interest  rate  and  repayment  terms  of the  Loan are more
      favorable than those that each individual  Borrower could have obtained on
      its own without the "pooling" of all of the collateral as security for the
      Loan, and without the joint and several liability features of the Note.

           (b) All of the individual  parcels of land  encumbered by the Deed of
      Trust are  interrelated  in a manner  such that  financing  of each of the
      separate  parcels  apart from the others would be upon terms that are less
      favorable  to  Borrowers,  and  Prudential  would not finance  each parcel
      separately under such more favorable terms.

           (c)  The  structure  of  the  Loan  has  been  devised  in  order  to
      accommodate  Borrowers'  existing  operational  structure in order to best
      serve Borrowers' collective interests.

      5.  REPRESENTATIONS  REGARDING  BORROWERS'  SOLVENCY.   Borrowers  further
jointly and severally covenant, represent and warrant to Prudential as follows:

           (a) The  proceeds of the Loan to be  received  by each of  Borrowers,
      coupled with the additional  consideration  described in subparagraph 4(b)
      and  other  consideration  described  in  the  Loan  Documents  constitute
      reasonably  equivalent value in exchange for all of the transfers made and
      obligations incurred by Borrowers under the Loan Documents.

           (b) The Deed of Trust is not being  executed by  Borrowers  for or on
      account of any antecedent debt owed by any Borrower to Prudential.

           (c) None of Borrowers  is insolvent as of the date hereof,  nor shall
      any  Borrower be  insolvent on the date of the Loan closing or the date of
      any Transfer.

           (d) The execution,  delivery, and recordation of the Deed of Trust is
      intended by Borrowers and Prudential to be a contemporaneous  exchange for
      new  value  given  to  Borrowers,  and  shall  in fact be a  substantially
      contemporaneous exchange.

           (e) The transfers made and  obligations  incurred by Borrowers  under
      the Loan  Documents are not made with actual intent to hinder,  delay,  or
      defraud any entity to which any Borrower was, is, or subsequently  becomes
      indebted.

           (f) No  Borrower  is or  shall  be  insolvent  on the  date  that any
      transfer is to be made or obligation to be incurred under the terms of the
      Loan Documents or on the date of the Loan closing,  nor shall any Borrower
      become insolvent as a result of such transfer or obligation.

           (g) No Borrower is engaged in business or a transaction,  or is about
      to engage in business or a transaction,  on the date of this  Certificate,
      the Loan closing or any such  transfer,  for which any property  remaining
      with such Borrower is an unreasonably small amount of capital.

           (h) No Borrower  intends to incur,  or believes  that it would incur,
      debts that would be beyond  such  Borrower's  ability to pay as such debts
      matured.

      6. INDEMNITY.  Borrowers jointly and severally agree to indemnify, defend,
protect  and hold  harmless  Prudential  against any  losses,  claims,  damages,
liabilities,  or expenses (including  attorneys' fees),  suffered or incurred by
Prudential  in the  event  of any  misrepresentation  by any  Borrower  in  this
Certificate.

      7. ATTORNEYS' FEES.  Borrowers  further agree that if any suit,  action or
proceeding  of any kind (an "action") is brought by any party hereto to enforce,
defend or interpret any provision of this  Certificate  (including an action for
declaratory  relief), the prevailing party in such action shall recover from the
other  parties  to such  action  all  reasonable  costs and  expenses  which the
prevailing party may incur in bringing or defending such action and/or enforcing
any judgment granted therein,  all of which shall be deemed to have accrued upon
the  commencement of such action and shall be paid whether or not such action is
prosecuted  to  judgment.  Any  judgment or order  entered in such action  shall
specifically  provide for the  recovery  of all  reasonable  costs and  expenses
incurred by the  prevailing  party in connection  therewith  including,  without
limitation,  costs and expenses incurred in enforcing such judgment.  Prudential
shall have the right (but not the obligation) to commence,  appear in, or defend
any action  purporting to affect any of the  interests,  rights,  obligations or
liabilities  of Prudential or Borrowers in connection  with this  Certificate or
any document referred to in this Certificate or executed in connection with this
Certificate,  and  Borrowers  agree to pay to Prudential on demand all costs and
expenses reasonably incurred by Prudential in connection therewith.

      8. SURVIVAL.  This Certificate and the representations and warranties made
herein shall survive the closing of the Loan,  and the execution and delivery of
the Loan Documents.

     9.  COUNTERPARTS.   This  Certificate  may  be  executed  in  one  or  more
counterparts and such  counterparts  taken together shall constitute one and the
same document.

      IN WITNESS WHEREOF, Borrowers have executed this Certificate as of the
day and year first written above.

                               BORROWERS:

                               MISSION WEST PROPERTIES, L.P.,
                               a Delaware limited partnership

                               By:Mission West Properties,
                                  a California corporation, its general partner

                                  By:  ________________________________
                                      Carl E. Berg, Chairman, President, CEO


                               MISSION WEST PROPERTIES, L.P. I,
                               a Delaware limited partnership

                               By:Mission West Properties,
                                  a California corporation, its general partner

                                  By:  ________________________________
                                      Carl E. Berg, Chairman, President, CEO


                               MISSION WEST PROPERTIES, L.P. II,
                               a Delaware limited partnership

                               By:Mission West Properties,
                                  a California corporation, its general partner

                                  By:  ________________________________
                                      Carl E. Berg, Chairman, President, CEO


                               MISSION WEST PROPERTIES, L.P. III,
                               a Delaware limited partnership

                               By:Mission West Properties,
                                  a California corporation, its general partner

                                  By:  ________________________________
                                      Carl E. Berg, Chairman, President, CEO





                                  EXHIBIT A to
  CERTIFICATE REGARDING DISTRIBUTION OF LOAN PROCEEDS AND INDEMNITY AGREEMENT




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      PROPERTY ADDRESS(ES)         PROPERTY       OWNERSHIP
                                      VALUE
      -----------------------------------------------------
      -----------------------------------------------------
                                                               
      4949 Hellyer Avenue          $20,909,728    MWP, LP
      -----------------------------------------------------
      -----------------------------------------------------
      4050 Starboard Drive         $7,507,118     MWP, LP
      -----------------------------------------------------
      -----------------------------------------------------
      45700 Northport Loop East    $7,118,116     MWP, LP
      -----------------------------------------------------
      -----------------------------------------------------
      45738 Northport Loop West    $6,059,223     MWP, LP
      -----------------------------------------------------
      -----------------------------------------------------
                                   $41,594,185
      -----------------------------------------------------
      -----------------------------------------------------

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

      -----------------------------------------------------
      -----------------------------------------------------
      10300 Bubb Road              $4,269,094     MWP, LP
                                                  I
      -----------------------------------------------------
      -----------------------------------------------------
      10500 North De Anza          $57,907,240    MWP, LP
      Boulevard                                   I
      -----------------------------------------------------
      -----------------------------------------------------
      1230 \ 1250 East Arques      $13,129,708    MWP, LP
      Avenue                                      I
      -----------------------------------------------------
      -----------------------------------------------------
      1135 Kern Avenue             $2,402,338     MWP, LP
                                                  I
      -----------------------------------------------------
      -----------------------------------------------------
      450/460 National Avenue      $4,526,751     MWP, LP
                                                  I
      -----------------------------------------------------
      -----------------------------------------------------
                                   $82,235,131
      -----------------------------------------------------
      -----------------------------------------------------

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

      -----------------------------------------------------
      -----------------------------------------------------
      3236 Scott Boulevard         $7,305,892     MWP, LP
                                                  II
      -----------------------------------------------------
      -----------------------------------------------------
      1212 Bordeaux                $10,102,559    MWP, LP
                                                  II
      -----------------------------------------------------
      -----------------------------------------------------
      1170 Morse                   $4,097,835     MWP, LP
                                                  II
      -----------------------------------------------------
      -----------------------------------------------------
      6311 San Ignacio             $2,995,501     MWP, LP
                                                  II
      -----------------------------------------------------
      -----------------------------------------------------
      6321 / 6325 San Ignacio      $12,365,352    MWP, LP
                                                  II
      -----------------------------------------------------
      -----------------------------------------------------
      6331 San Ignacio             $14,917,702    MWP, LP
                                                  II
      -----------------------------------------------------
      -----------------------------------------------------
      6341 / 6351 San Ignacio      $8,905,930     MWP, LP
                                                  II
      -----------------------------------------------------
      -----------------------------------------------------
                                   $60,690,771
      -----------------------------------------------------
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      -----------------------------------------------------
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      3550 \ 3560 \ 3570 \ 3580    $21,496,897    MWP, LP
      Bassett Street                              III
      -----------------------------------------------------
      -----------------------------------------------------
      3540 \3542 \ 3544 Bassett    $11,801,222    MWP, LP
      Street                                      III
      -----------------------------------------------------
      -----------------------------------------------------
                                   $33,298,119
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      PORTFOLIO TOTAL              $217,818,206
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