“Standard” describes common manufacturing increments; it does not guarantee that a particular door model fits an existing garage. Measure the building and then check the exact manufacturer’s size and track tables.
Clopay identifies 8-by-7 and 9-by-7 feet as common single-car sizes and 16-by-7 feet as a common double-door size. Amarr likewise identifies 8-by-7 and 16-by-7 as typical examples. Both manufacturers offer additional sizes, and availability varies by model.
Common residential dimensions
Frequently encountered nominal sizes include:
| Opening use | Common examples |
|---|---|
| Single-car door | 8 × 7 ft, 9 × 7 ft |
| Wider single door | 10 × 7 ft, model dependent |
| Double door | 16 × 7 ft |
| Taller residential opening | 7- or 8-ft height, model dependent |
These are planning examples, not an ordering chart. Product construction, section layout, wind requirements, windows, and track configuration can affect availability.
Measure more than width and height
The manufacturer’s measuring process includes:
- Opening width and height — measure the finished opening at multiple points.
- Left and right side room — space beside the opening for track and hardware.
- Headroom — space above the opening for track, springs, and operator components.
- Backroom — unobstructed depth into the garage.
- Obstructions — framing, beams, pipes, lights, outlets, storage, and ceiling changes.
Also record whether the floor is level, the jambs and header are sound, and an opener rail or wall-mounted operator is planned.
Why nominal door size is not the full specification
Two doors with the same nominal width and height may use different:
- section heights and layouts;
- track radius or lift configuration;
- spring and counterbalance systems;
- reinforcement for wind or width;
- window arrangements;
- insulation and construction; and
- operator or rail requirements.
For commercial openings, size ranges and headroom requirements can differ substantially from residential products. Use the commercial model’s documents rather than a residential chart.
A safer planning workflow
- Photograph the full opening from inside and outside.
- Measure width, height, side room, headroom, and backroom.
- Record ceiling slope and the lowest obstruction.
- Photograph the existing door and hardware labels.
- Note the largest vehicle or equipment that must clear the opening.
- Confirm the exact product and track drawing before ordering.
Do not remove springs, cables, tracks, or brackets to take measurements. Those components may be under tension.
For an opening in DFW, request new-door planning help and include measurements and photos.
Sources
- Clopay: Standard Garage Door Sizes and How to Measure
- Clopay: Residential Garage Door FAQ
- Amarr: Residential Garage Door Sizing Guide
- Amarr: Design Your Garage Door
Common questions
What are common single-car garage door sizes?
Manufacturer guides commonly list 8-by-7 and 9-by-7 doors, with other widths and 8-foot heights available in many product lines. Confirm the exact model’s size table.
What is a common double garage door size?
Sixteen feet wide by seven feet high is a common residential double-door size, but 8-foot heights and other widths are also available.
Is the framed opening the only measurement needed?
No. Side room, headroom, backroom, framing, track configuration, spring system, opener rail, floor level, and obstructions can affect fit.