Columbia Property Trust (CXP) 10-Q 2006 Q1 Quarterly report

EXHIBIT 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

AND CHIEF FINANCIAL OFFICER

PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

(18 U.S.C. 1350)

In connection with the Quarterly Report on Form 10-Q of Wells Real Estate Investment Trust II, Inc. (the “Registrant”) for the quarter ended March 31, 2006, as filed with the Securities and Exchange Commission (the “Report”), the undersigned, Leo F. Wells, III, Chief Executive Officer of the Registrant, and Douglas P. Williams, Chief Financial Officer of the Registrant, hereby certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that, to the best of our knowledge and belief:

(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 Registrant.

/s/ LEO F. WELLS, III

Leo F. Wells, III

Chief Executive Officer

May 10, 2006

/s/ DOUGLAS P. WILLIAMS

Douglas P. Williams

Chief Financial Officer

May 10, 2006