What are the standard garage door sizes?
Single doors are most often 8 or 9 feet wide; doubles are usually 16 feet, with 18 appearing on newer builds. Height is typically 7 feet on older homes and 8 feet on newer ones. Sizes step in one-foot increments, and anything off that grid becomes a custom order with its own lead time.
The common grid
- Single doors: 8 and 9 feet wide are by far the most common; 10 feet shows up on shops and newer builds.
- Double doors: 16 feet dominates; 18 feet is increasingly common on newer construction.
- Heights: 7 feet on most homes built through the 1990s; 8 feet on much newer construction and most shops.
- Increments: stock sizes step by one foot. Off-grid means custom.
In this metro, a home from the 1970s or 80s very often has a 16 by 7 double, while newer Edmond and Yukon builds trend toward 16 or 18 by 8.
Measuring what you actually have
Measure the finished opening, not the door. Width at the widest point between the jambs and height at the tallest point from the floor to the header, since older garages are rarely perfectly square. Then measure the clearances: headroom above the opening, backroom behind it, and side room at each jamb.
The step-by-step is in measuring a garage door opening, and the clearances that determine what hardware fits are in headroom and backroom requirements. If the opening measures noticeably different top to bottom, read an opening that is not square.
When custom is unavoidable
Older homes, additions, barns, and shops routinely have openings that do not land on the grid. So do garages where a previous owner modified the opening. Custom doors are entirely normal — the considerations are in custom size garage doors — but they come with longer lead times and less flexibility if something needs changing.
Occasionally it is cheaper to reframe the opening to a standard size than to order custom, particularly if the framing needs attention anyway. That is worth pricing both ways, and it may involve a permit per permits for garage doors.
When to think about going bigger
Height is the one people regret. A 7-foot door is tight for a lifted truck, a van with a roof rack, or a boat on a trailer, and going to 8 feet at replacement time is far easier than doing it later — though it does mean header work. The specific case is in raising a door for a lifted truck.
Width matters for two-single versus one-double decisions on new builds, weighed in two singles or one double. Our OKC team measures on site before quoting so the size question is settled properly — free estimates.
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Related Questions
How do I measure my garage opening for a new door?+
Take five measurements: opening width and height (jamb to jamb, floor to header), side room on each side (3.75 inches minimum for standard track), headroom above the opening (10 inches minimum with an opener, ideally 12+), and backroom depth (door height plus 18 inches). Read the full answer →
Can I order a custom-size garage door, or only standard sizes?+
Yes. CHI, DoorLink, Haas, and Mid-America all build residential doors to custom widths and heights, most in 3-inch increments and CHI down to the inch. Read the full answer →
Can my garage door opening be widened for a bigger door?+
Yes, in most homes. Widening means removing the wall section, installing a longer engineered header, and reframing the jambs, then hanging the wider door. Read the full answer →
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