CalAtlantic (CAA) 10-Q 2005 Q1 Quarterly report

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Each of the undersigned hereby certifies, in his capacity as an officer of Standard Pacific Corp., a Delaware corporation (the “Company”), for purposes of 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

• the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2005, as filed with the Securities and Exchange Commission on the date hereof, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, and

• the information contained in such report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: May 4, 2005

/s/ Stephen J. Scarborough

Stephen J. Scarborough

Chairman of the Board of Directors and

Chief Executive Officer

/s/ Andrew H. Parnes

Andrew H. Parnes

Executive Vice President – Finance and

Chief Financial Officer