With the City of Oklahoma City and Oklahoma County owning several square miles of land adjacent to the base, Tinker is one of the few military bases in a major metropolitan area with sufficient room for expansion. Furthermore, Tinker is located in a community that supports expansion; Oklahoma County voters approved a 2008 measure to purchase the former General Motors Oklahoma City Assembly plant (located adjacent to the base) and lease it to Tinker for future expansion. Now known as Building 9001, the former GM plant houses many shops moved from the main maintenance building, 3001.