there are three different way for garage foundation $ \/ c4 v4 h0 X6 J9 c2FT grade beam + piles $ l# L& P8 Y9 `6 ~9 U5FT foundation wall 3 ~9 X; r: ^2 w8FT foundation (similar to house foundation). G4 M, e; T9 N( y- Z" ^ 2 h3 j G c8 b2 V) pall three works. and they all have pros and cons for each though