Exhibit 32.1

CERTIFICATION PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

(18 U.S.C. SECTION 1350)*

In connection with the Quarterly Report of Whitestone REIT, a Maryland real estate investment trust (the “Company”) on Form 10-Q for the period ended September 30, 2007, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, James C. Mastandrea, Chief Executive Officer of the Company, certify pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1)   The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)   The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated this November 14, 2007	/s/ James C. Mastandrea
	James C. Mastandrea
	Chief Executive Officer

*           In accordance with SEC Release No. 34-47986, this Exhibit is furnished to the SEC as an accompanying document and is not deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933.  A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.