Exhibit 23 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statement on Forms S-8 (Numbers 2-68161, 33-16154, 33-40664, and 33-40665) of Mission West Properties of our report dated January 26, 1996 appearing on page 8 of this Form 10-K. PRICE WATERHOUSE LLP San Diego, California February 15, 1996