Ceiling height
Plan on 10 feet for a full swing with a driver. Nine feet works for many players, and anything lower needs a closer look.
The club passes over your head at the top of the backswing and again on the follow-through. For most adults that arc tops out somewhere between 9 and 10 feet, so the tallest golfer in the house sets the number.
Measure from the floor you will stand on to the lowest thing overhead in the swing area. Beams, ductwork, soffits, light fixtures and garage door tracks all count. A turf platform or hitting mat raises the golfer an inch or more, so subtract that too.
Overhead launch monitors such as the Foresight Falcon mount on the ceiling above the hitting area and have their own height range, which we check against your room.