Overbrook is a neighborhood on Pittsburgh, Pennsylvania's South Hills area. It has zip codes of 15227, 15234 and 15210 and has representation on Pittsburgh City Council by the council member for District 4. Originally called Fairhaven, the name was changed to Overbrook when breaking away from Baldwin Township to become a borough. Overbrook is loc…Overbrook is a neighborhood on Pittsburgh, Pennsylvania's South Hills area. It has zip codes of 15227, 15234 and 15210 and has representation on Pittsburgh City Council by the council member for District 4. Originally called Fairhaven, the name was changed to Overbrook when breaking away from Baldwin Township to become a borough. Overbrook is located at the edge of the city, south of Downtown, and is surrounded by the city neighborhoods Brookline and Carrick and the boroughs of Castle Shannon and Whitehall. Overbrook Borough was one of the last annexed into the City of Pittsburgh. The historic Overbrook Community Center retains its borough origins and is still used by the community.