[G & J Letterhead]



______ __, 1998



Mission West Properties
10050 Bandley Drive
Cupertino, California  95014

Mission West Properties, Inc.
10050 Bandley Drive
Cupertino, California  95014

           Re:  Certain Federal Income Tax Matters

Ladies and Gentlemen:

           This  opinion  is  delivered  to you in our  capacity  as  counsel to
Mission West Properties, a California corporation,  ("Mission West") and Mission
West Properties,  Inc., a Maryland  corporation  ("Mission  West-Maryland"),  in
connection  with the amended  registration  statement on Form S-4 containing the
Proxy  Statement/Prospectus of Mission West addressed to holders of common stock
of  Mission  West  (the  "Proxy   Statement/Prospectus"),   which  Mission  West
originally  filed with the Securities  and Exchange  Commission on May 15, 1998.
The Proxy Statement/Prospectus  relates to the following proposals (i) the offer
and sale at $4.50 per share of 6,495,058  shares of common stock of Mission West
to accredited investors in a private placement (the "Private  Placement");  (ii)
the ratification of Mission West's  acquisition of  approximately  12.11% of the
total  partnership  interests in, and becoming the sole general partner of, each
of four limited  partnerships  for  $35,200,000  (collectively,  the  "Operating
Partnership");  (iii) the offer  and sale of up to  93,398,705  shares of common
stock of Mission  West  issuable  upon the future  exchange  of units of limited
partnership  interest  in the  Operating  Partnership;  and (iv) the  merger  of
Mission  West  with  and  into  Mission  West-Maryland  pursuant  to the  Merger
Agreement  and Plan of Merger (the  "Merger  Agreement")  (the  "Reincorporation
Merger").

           This opinion  relates to Mission  West-Maryland's  qualification  for
federal income tax purposes as a real estate investment trust ("REIT") under the
Internal  Revenue  Code of 1986,  as  amended  (the  "Code"),  the status of the
Operating Partnership as a partnership for federal income tax purposes,  and the
accuracy of the  discussion of federal  income tax  considerations  in the Proxy
Statement/Prospectus.  Certain  capitalized  terms not defined herein shall have
the meanings attributed to them in the Proxy Statement/Prospectus.

           In  rendering  the  following  opinions,  we have  examined the Proxy
Statement/Prospectus,  the  Articles  of  Incorporation  and  Bylaws of  Mission
West-Maryland,  the Merger  Agreement,  the Acquisition  Agreement among Mission
West  Properties,  Certain  Partnerships and the Berg Group (as defined therein)
dated as of May 14,  1998  (the  "Acquisition  Agreement"),  the  agreements  of
limited  partnership  of the  Operating  Partnership,  the pro  forma  financial
statements  of  Mission  West  prepared  as of  September  30,  1998 and for the
three-month  period  then ended  (the "Pro  Formas"),  and such  other  records,
certificates  and  documents  as we have deemed  necessary  or  appropriate  for
purposes  of  rendering  the open set forth  herein.  The  foregoing  documents,
including  the Pro Formas,  are referred to herein as the  "Documents".  We also
have relied upon the representations of Mission West, Mission West-Maryland, and
the Operating  Partnership regarding the manner in which such entities have been
and will be owned  and  operated  (the  "Management  Representations").  We have
neither  independently  investigated nor verified such  representations,  and we
assume that such  representations  are true,  correct and  complete and that all
representations  made "to the best of the knowledge and belief" of any person(s)
or party(ies) or with similar  qualification  are and will be true,  correct and
complete as if made  without  such  qualification  and that no action will occur
from the date hereof until the Reincorporation  Merger that is inconsistent with
such  representations.  We further  assume that the  Reincorporation  Merger and
related  transactions  contemplated  by the  Documents  will be  consummated  in
accordance with the Documents and as described in the Proxy Statement/Prospectus
(including  satisfaction  of all covenants and conditions to the  obligations of
the parties without  amendment or waiver thereof)  insofar as is relevant to the
opinions  contained herein and that, prior to the  Reincorporation  Merger,  all
entities have operated and will operate in accordance  with  applicable laws and
the terms and conditions of applicable  documents.  In addition,  we assume that
each of the limited partnerships  included in the Operating Partnership will be,
or will make a timely election to be, classified as a partnership as provided by
ss.301.7701-3 of the Procedure and Administration  Regulations promulgated under
the Code.

           In rendering the opinions set forth  herein,  we have assumed (i) the
genuineness  of  all  signatures  on  documents  we  have  examined,   (ii)  the
authenticity of all documents submitted to us as original,  (iii) the conformity
to the original  documents of all documents  submitted to s as copies,  (iv) the
conformity of final  documents to all documents  submitted to us as drafts,  (v)
the authority and capacity of the  individual  or  individuals  who executed any
such documents on behalf of any person,  (vi) the accuracy and  completeness  of
all  records  made  available  to us  and  (vii)  the  factual  accuracy  of all
representations,  warranties and other  statements made by all parties.  We also
have  assumed,   without  investigation,   that  all  documents,   certificates,
warranties  and  covenants on which we have relied in rendering the opinions set
forth  below and that were given or dated  earlier  than the date of this letter
continue  to remain  accurate,  insofar as relevant  to the  opinions  set forth
herein, from such earlier date through and including the date of this letter.

           The opinions set forth below are based upon the current provisions of
the  Code,  the  Income  Tax  Regulations   and  Procedure  and   Administration
Regulations  promulgated  thereunder,  all as of the date  hereof,  and existing
administrative and judicial  interpretations  thereof, all as of the date hereof
of which are subject to change.  Future  changes in applicable law may cause the
federal income tax treatment of Mission West and the Mission West-Maryland to be
materially and adversely different from that described below:

           Based upon and subject to the foregoing, we are of the opinion that:

1. Mission West-Maryland is organized, as of the date hereof, in conformity with
the  requirements  for  qualification  and taxation as a real estate  investment
trust ("REIT") under the Code, and Mission  West-Maryland's  proposed  method of
operation  (as  described  in the  Management  Representations),  including  for
periods   following  the   Reincorporation   Merger,   should   enable   Mission
West-Maryland  to  continue  to meet  the  requirements  for  qualification  and
taxation as a REIT for periods  following  the date  hereof,  including  periods
following the effective time of the Reincorporation Merger.

2. The Operating Partnership will be treated as a partnership for federal income
tax purposes and will not be subject to federal  income tax as a corporation  or
an association taxable as a corporation.

3. The discussion in the Proxy  Statement/Prospectus under the captions "FEDERAL
INCOME  TAX  CONSIDERATIONS,"  and  "FEDERAL  INCOME  TAX  CONSEQUENCES  OF  THE
REINCORPORATION MERGER", to the extent that such sections discuss matters of law
or legal conclusions, is accurate in all material respects.

           We express no opinion  herein  other than those  expressly  set forth
herein.  You should  recognize  that our opinion is not binding on the  Internal
Revenue  Service  (the "IRS"),  and that the IRS may  disagree  with the opinion
contained  herein.  Although we believe  that our opinion  will be  sustained if
challenged, there can be no assurance that this will be the case.

           We consent to being named as counsel to the Company and Mission  West
in  the   Proxy   Statement/Prospectus,   to  the   references   in  the   Proxy
Statement/Prospectus  to our firm and to the inclusion of a copy of this opinion
letter as an exhibit to the Proxy Statement/Prospectus.  In giving such consent,
however,  we do not thereby admit that we are an "expert"  within the meaning of
the Securities Act of 1933, as amended.  This opinion is being  furnished to you
solely  for  the  purpose  of  being   included  as  an  exhibit  to  the  Proxy
Statement/Prospectus.  This opinion may not be used or relied upon for any other
purpose without our prior written consent.



                                Very truly yours,



                               GRAHAM & JAMES LLP