What would an extra 2-car garage cost to add to the existing plan
I heard that it would be cheaper to build a separate/detached 2-car garage, rather than adding one extra attached garage to another garage existing on the house plan, because the detached garage does not need to follow exactly the codes/regulations or methods used. A detached garage is simplier to build, so less cheaper.
However, I would think that a detached garage has 4 walls and it's own roof to be built. Wouldn't it be cheaper to add an extra garage next to the garage existing on the plan, for it only needs 3 walls and less roof?