Answers (1)
It depends on what you want to put in it. A kitchen garage to hold a mixer only needs to be a foot wide. I have seen trucks and bulldozers that are twenty to thirty feet wide. An airplane garage, called a hangar, might be hundreds of feet wide. Here is a hangar so big that someone built a resort with a fake ocean beach inside: www.erase.net/weblog/2009-07/tropical-island-blimp-hangar--christopher-morlinghaus