Many carport options are designed to assemble and install yourself. Choose a kit that is designed for DIY assembly, like the Arrow 12 ft. W x 20 ft. D x 7 ft. H Charcoal Galvanized Steel Carport, Car Canopy and Shelter or the Integra 12 ft. x 8 ft. White Aluminum Frame White Roof Carport, 3 Posts 30 lbs. Snow Load.