bodabdan, Just talked with my friend.. He's got a 40x40. On one side of the building he's got a 14x40 foot enclosed shop, concrete and insulated with garage doors on either end and a 3 foot entry door on the side with a window. The other 26x40 is open, just the roof, he puts his Camper in there. He's putting limestone in there. Said it was about $18.50/sq ft.