Capital Properties (CPTP) 10-Q 2017 Q2 Quarterly report

Exhibit 32.1

CAPITAL PROPERTIES, INC. AND SUBSIDIARIES

Certification 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 Capital Properties, Inc. (the Company) on Form10-Q for the quarterly period ended June 30, 2017, as filed with the Securities and Exchange Commission on the date hereof (the Report), I, Robert H. Eder, Chairman and Principal Executive Officer of the Company, certify, pursuant to 18 U.S.C. ss. 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 results of operations of the Company.

/s/ Robert H. Eder

Robert H. Eder

Chairman and Principal Executive Officer

August 4, 2017