What Vern said plus build it high enough to get a vehicle up on a lift and a floor drain for washing in the winter,wet sanding or just washing down the floor.
Had a buddy that did this a few decades ago and his was a four car square garage with the bath, crapper and utility room. We also hung an I-beam across the width of the garage for a hoist trolly.
Wish I were thirty years younger and knew then what I know now. I would have built the model auto shop like my buddy instead of building a hanger and a couple of airplanes.
Denny Graham
Sandwich, IL
