GarageFit Measuring guide
Standard garage dimensions are only a starting point.
An 8-foot door or 12-by-20-foot garage may describe the plan, but tracks, trim, storage and construction tolerances determine the space you can actually use.
Common U.S. garage sizes
Many single-car garage doors are described as 8 or 9 feet wide and 7 or 8 feet high. A frequently used planning example for a single-car interior is 12 feet wide by 20 feet deep. These are common examples, not guarantees or universal building standards. Your usable opening can be smaller than the nominal size.
How to measure your garage correctly
- Door width: measure the narrowest clear horizontal opening between trim, seals and hardware.
- Door height: measure from the highest point of the floor or threshold to the lowest obstruction at the opening.
- Interior width: measure the usable wall-to-wall space where the vehicle will sit, excluding shelves, posts and stored items.
- Interior depth: measure from the closed garage door to the nearest permanent obstruction at the back.
Door clearance is not parking comfort
A vehicle can pass through the opening yet still be awkward to use. You need room to correct your angle, open the driver door, walk around the vehicle and keep clear of tracks, steps and cabinets. Pickup length can also leave too little room to close the door.
Measure the vehicle with mirrors extended and include roof rails, racks or antennas. If the fit is close, repeat every measurement and use a spotter before attempting to enter.
Check your garage →