Prefabricated garages vary in price depending on the size and the building materials, but as of 2015, new garages range from about $2,000 to $20,000. Wooden garages come with vinyl, wood or aluminum siding and range from about 10 to 30 feet wide.
Single-car garages or workshop garages are the cheapest garages, selling for about $2,000 to $6,000. The cheapest two-car garages are about $6,000 and the most expensive ones are as much as $20,000. The length of garages varies significantly from 10 to 40 feet, with longer garages considerably more expensive. Siding options also influence the value of garages.