What Are Standard Garage Door Sizes? Common Garage Door Sizes Explained
Common garage door sizes are 8 or 9 feet wide by 7 feet high for a single door, and about 16 feet wide by 7 feet high for a double door. If you need help checking an opening before ordering, call us at (629) 283-1518.
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Common Garage Door Sizes for Single and Double Bays
For a typical home, a single garage door is commonly 8 or 9 feet wide and 7 feet high. A 10-foot-wide single door is another option when the opening and available space allow it. Double garage doors are commonly 16 feet wide by 7 feet high; 18-foot-wide doors are also used for some wider openings.
These dimensions describe common door sizes, not a promise that a particular door will fit your garage. The opening, frame, tracks, and clearance above and beside the door all affect the choice. Measure the existing opening before you order, and check the door maker’s specifications for the exact product.
A garage door that looks close in width may still be wrong if the opening is out of square or there is too little room for tracks and hardware. If you’re replacing a door and want a professional to assess the opening and door condition, see our residential garage door repair service.
Which Garage Door Width Fits Your Garage?
Choose a size based on the clear opening and how you use the garage, not only on the number of cars you park inside. The options below are common starting points; your actual opening and the door manufacturer’s requirements determine what fits.
Single door, about 8 feet wide
This is a common compact single-door option. Check that the opening gives you enough room to enter and exit without striking the jambs or nearby objects.
Single door, about 9 or 10 feet wide
A wider single door can provide more room to maneuver. It only works when the garage opening and the side space for tracks support the door system.
Double door, about 16 feet wide
A 16-foot-wide door is a common choice for a two-car opening. Confirm the opening width and the space needed for the door’s tracks and hardware.
Taller door, often 8 feet high
A taller opening may suit a garage with more vertical clearance or a taller vehicle. Measure the opening height rather than assuming a standard 7-foot door will work.
How to Measure a Garage Door Opening Before Ordering
Use a tape measure, pencil, and notepad. Measure the clear opening and surrounding garage space, but do not loosen hardware, move tracks, or try to adjust a door that is stuck or unbalanced.
- Clear the area and look for damage — Move vehicles and stored items away from the opening. From a safe position, check for a visibly bent track, loose door sections, or a door sitting crooked; stop and call for help if you see a problem.
- Measure the opening width — Measure from the inside edge of one side jamb to the inside edge of the other. Record the width at the top and bottom; if the numbers differ, note both rather than choosing one.
- Measure the opening height — Measure from the floor to the top of the opening at both sides. Record any difference, and note a sloped or uneven floor that could affect the bottom seal.
- Check the opening diagonals — Measure from one top corner to the opposite bottom corner, then repeat across the other diagonal. Different measurements can indicate that the opening is out of square, so share both numbers with the installer.
- Measure the headroom — Measure the space between the top of the opening and the ceiling or nearest obstruction. This overhead clearance helps determine whether the door and track system can fit.
- Measure the side room — Measure from each side of the opening to the nearest wall or obstruction. Record the left and right measurements separately because the track system needs room beside the door.
- Check the backroom — Measure from the opening toward the back wall or nearest obstruction. Note ceiling lights, beams, and other items in that space, since they may interfere with tracks or the opener.
- Write down the door and opener details — Record whether the door is single or double, its panel configuration, and any visible opener information. Compare your notes with the product’s installation requirements before selecting a size.
Need help now? (629) 283-1518
Why Headroom, Side Room, and Backroom Matter
The opening dimensions alone do not tell you whether a door system fits. Headroom is the space above the opening, side room is the space beside it, and backroom is the depth available inside the garage. Tracks and an opener need room to operate without hitting a ceiling beam, light, shelf, or other obstruction.
Door and track configurations differ, so there is no single clearance figure that applies to every setup. Use the requirements for the exact door and hardware you are considering. If your measurements are tight, unusual, or hard to access, get a professional assessment instead of guessing.
Door Size and Opening Size Are Not Always the Same
A common source of ordering mistakes is treating the visible opening, the existing door, and the replacement door as interchangeable measurements. Record each separately when you can do so safely.
- Clear opening — The width and height between the inside edges of the garage opening. Measure this first because it defines the passage the door must cover.
- Existing door — The door’s overall width and height. These measurements can help identify what is installed now, but they do not confirm that a different door system will fit.
- Frame and surrounding space — The jambs, ceiling, side walls, and interior depth around the opening. These areas affect whether tracks, springs, and the opener have the space they need.
- Finished floor level — The floor where the bottom edge of the door closes. A slope or uneven surface may leave a gap even when the door width and height seem correct.
What Can Go Wrong When a Garage Door Is the Wrong Size?
A door that is too wide or too narrow may not seal against the opening, and a door that is too tall may collide with overhead obstructions. Measurements taken from the outside trim instead of the clear opening can also lead to the wrong order. A door that binds, sits crooked, or leaves an uneven gap may point to an opening, track, or door problem—not simply a need to force a different size into place.
Do not try to resize an opening by moving tracks or adjusting springs or cables. Those parts can be dangerous under tension. For a damaged, off-track, or poorly closing door, stop operating it and call a professional; our residential garage door repair team can inspect the door and help identify the issue.
If the opening is sound but you are comparing replacement options, our guide to garage door installation costs covers the separate question of installation pricing. For door safety, you can also review the Clopay garage door safety checklist.
Need help now? (629) 283-1518
When Garage Door Measurements Need a Professional Check
Get help if the opening is uneven, the door is crooked, a track is bent, or the door will not move normally. Do not remove a door, loosen a spring, handle a cable, or try to force a door that has come off its track. Keep people and vehicles clear of a door that appears unstable.
A professional can check the opening, existing door, and available clearance together rather than relying on one measurement. If you’re ready to have the door assessed, contact us; Nashville Garage Door Services is open 24/7. You can also find our garage door repair in Nashville information here.
Frequently asked questions
What is the most common size for a single garage door?
A single residential garage door is commonly 8 or 9 feet wide by 7 feet high. Measure the clear opening and check the available track clearance before choosing between sizes.
Is a 16-foot garage door wide enough for two cars?
A 16-foot-wide door is a common size for a two-car garage, but the right fit depends on the actual opening and how much room you need to maneuver. Check the jambs and side clearance as well as the width.
Can I replace my garage door with a different size?
Sometimes, but a different size must suit the opening and the space needed for the tracks and opener. Have a professional assess the framing and clearance before ordering a door that differs from the one you have.
What should I do if my garage opening is not square?
Write down the width, height, and both diagonal measurements, and do not assume a standard door will cover the difference. Ask a garage door professional to assess the opening and recommend the next step.
Check the Fit Before You Order
Call Nashville Garage Door Services at (629) 283-1518 to discuss your measurements or arrange a garage door assessment.