Exhibit 32.1

                             W. P. CAREY & CO. LLC

                  CERTIFICATION OF CO-CHIEF EXECUTIVE OFFICERS
                       PURSUANT TO 18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of W. P. Carey & Co. LLC (the "Company")
on Form 10-Q for the period ending September 30, 2004 as filed with the
Securities and Exchange Commission on the date hereof (the "Report"), we,
William Polk Carey, Co-Chief Executive Officer of the Company, and Gordon F.
DuGan, Co-Chief Executive Officer of the Company, certify, to the best of our
knowledge and belief, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to
Section 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 result of operations
            of the Company.

/s/      William Polk Carey                 /s/   Gordon F. DuGan
         ----------------------------             ------------------------------
         William Polk Carey                       Gordon F. DuGan
         Chairman                                 President
         (Co-Chief Executive Officer)             (Co-Chief Executive Officer)

         11/5/2004                                11/5/2004
         ---------                                ---------
         Date                                     Date

A signed original of this written statement required by Section 906, or other
document authenticating, acknowledging, or otherwise adopting the signature that
appears in typed form within the electronic version of this written statement
required by Section 906, has been provided to W. P. Carey & Co. LLC and will be
retained by W. P. Carey & Co. LLC and furnished to the Securities and Exchange
Commission or its staff upon request.