How Much Does a Metal Garage Cost The cost to build an 18×24 steel garage is around $6,836.50 to $10,000, $10,120 to 15,000 for a 24×26 two-car garage, and it can go up to 25,000 for a 30×40 commercial metal garage. The average price per square foot for most metal garages will range between $10 […]