EXHIBIT 23.3 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Prospectus constituting part of this Registration Statement on Form S-4 of Mission West Properties of our report dated February 11, 1997, except as to the 1 for 30 reverse stock split discussed in Note 1, which is as of November 10, 1997, appearing on page F-3 of Mission West Properties' Annual Report on Form 10-K for the year ended December 31, 1997. We also consent to the reference to us under the heading "Experts" in such Prospectus. San Diego, California October 27, 1998 /s/ PricewaterhouseCoopers LLP