December 6, 2019

Paul M. Galvin
Chief Executive Officer
SG Blocks, Inc.
195 Montague Street, 14th Floor
Brooklyn, New York 11201

       Re: SG Blocks, Inc.
           Registration Statement on Form S-1
           Filed November 27, 2019
           File No. 333-235295

Dear Mr. Galvin:

       This is to advise you that we have not reviewed and will not review your
registration
statement.

        Please refer to Rules 460 and 461 regarding requests for acceleration.
We remind you
that the company and its management are responsible for the accuracy and
adequacy of their
disclosures, notwithstanding any review, comments, action or absence of action
by the staff.

       Please contact Katherine Bagley at (202) 551-2545 with any questions.



                                                            Sincerely,

                                                            Division of
Corporation Finance
                                                            Office of Trade &
Services
cc:    Patrick J. Egan