 In August 2009 Da Costa signed a three-year contract with English side West Ham United, for an undisclosed fee, as part of a deal that took Savio Nsereko to Fiorentina.He made his debut for West Ham in their 3–1 away defeat in the League Cup to Bolton Wanderers on 22 September 2009.His league debut arrived on 28 September 2009 in a 3–1 defeat at Manchester City.