Indicate by check mark if the registrant is submitting
the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):

Yes ______ No ___X___

Indicate by check mark whether by furnishing the information contained in this Form,
the Registrant is also thereby furnishing the information to the Commission pursuant
to Rule 12g3-2(b) under the Securities Exchange Act of 1934:

Yes ______ No ___X___

If “Yes” is marked, indicate below the file number assigned
to the registrant in connection with Rule 12g3-2(b): N/A

GAFISA S.A.

Corporate Taxpayer’s ID (CNPJ/MF) No. 01.545.826/0001-07

Corporate Registry (NIRE) 35.300.147.952

Publicly-Held Company

NOTICE TO MARKET

São Paulo, SP, Brazil, August 17, 2015 – GAFISA S.A. (BOVESPA: GFSA3) (“Gafisa” or “Company”) hereby discloses to the market the communication received on this date from its shareholder Pátria Investimentos Ltda., with headquarters located in the City of São Paulo, State of São Paulo, at Avenida Cidade Jardim 803, 8^th floor, Room A, enrolled with CNPJ/MF under No. 12.461.756/0001-17 (“Investor”), pursuant to Article 12 of CVM Instruction 358/02, as follows:

1. The Investor, via investment funds under its discretionary management, became the holder of 21,171,700 common shares issued by Gafisa, on August 14, 2015, reaching relevant participation of 5.5999987% of the total capital stock of the Company;

2. The Investor declares that its objective for the participation abovementioned is strictly of investment and the participation does not have the purpose of changing the controlling group or the administrative structure of the Company;

3. In addition, the Investor, as well as the investment funds under its discretionary management, declare that they do not hold any convertible debentures issued by the Company or any other securities convertible in shares or that grant rights to subscribe or acquire shares issued by the Company; and

4. Finally, the Investor declares that the Invertor and the investment funds under its discretionary management have not entered into any contract or agreement governing the exercise of voting rights or the purchase and sale of the securities issued by the Company.

São Paulo, August 17, 2015.

GAFISA S.A.

André Bergstein

Investor Relations Officer

SIGNATURE