Exhibit 32.1

Certification of Co-Chief Executive Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report of Green Brick Partners, Inc. (the “Company”) on Form 10-Q for the period ended September 30, 2026 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, James R. Brickman, Co-Chief Executive Officer of the Company, certify to my knowledge, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. Section 1350), 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.

Date:    October 28, 2026

                    

By:			/s/ James R. Brickman
Name:			James R. Brickman
Title:			Co-Chief Executive Officer