In the process of designing my long-awaited toy garage. Located in Maryland. It is going to be 30' x 50'. Many questions to answer. Fortunate to have found this site to share the progress and gets some input. Ted.
It helps to put your location in your profile.....
And allow me to be the first to say....it's never big enough....
Spend some time doing searches on old threads....just about any question you can ask has already been asked....walls....height...trusses....floors...insulation....etc.