Has anyone ever installed a garage on a pier foundation? I was going to have a contractor install a concrete slab foundation, and place a pre fab metal building on top of it, but the costs for the foundation are very high because the site is not at all flat, and needs 30 inch footers. They also can't place the garage where I would like due to the size of machinery. The foundation would cost much more than the garage in short. Therefore I am thinking of going with a pier foundation and placing either a pole barn/timber frame on top of it, because I could install the piers one at a time and to avoid grading. (Keeping the dirt floor where i can cut into the bank and building a framed floor where it is elevated. Has anyone ever done this? A grainery up the road is constructed like this but it is very old.