12' X 20' Car Garage Project Plans -Design #51220 Roof Style : Gable , Total Sq. Ft : 240 Sq. Ft Building Size : 12' x 20' , Overall Height : 10'-11" , Wall Height : 8' , Roof Pitch : 5/12 Roof Span: 12' , Side Door : 30" x 82" Overhead Door : 8'W 7'H , Foundation : Slab