15 standard sizes
Every standard garage door size
Single, double and oversize. Each page has the size drawn to scale with a vehicle in it, the rough opening, and what it costs installed.
Four sizes cover most American houses. A single garage is 8x7 on anything built before roughly 1970 and 9x7 on almost everything since; a double is 16x7 on houses from the 1970s onwards and 16x8 on much of what has gone up in the last twenty years. If you are standing in front of an opening and guessing, start there.
Width is set by the building and rarely changes. Height is what moved — cars got taller before they got wider, and seven feet of opening stopped clearing a pickup with anything on the roof. That is the whole reason 16x8 exists alongside 16x7, and it is why choosing “the next size up” solves nothing unless you know which dimension is the problem: mirrors and car doors want more WIDTH, a roof rack wants more HEIGHT.
Everything outside those four is a real product and a slower one. Stock sizes are on a shelf somewhere near you; the rest are ordered, and the lead time is the thing people discover after they have booked a fitter. Each page below says which it is.
One measurement before you go further: the size is the FINISHED OPENING in the wall, not the old door, not the concrete apron and not the gap between the two nearest studs. For a sectional door the rough opening equals the door size exactly — framing it wider leaves a gap the seal cannot close. How to measure it →
| Size | Width | Height | What fits |
|---|---|---|---|
| 16x7 | 16' | 7' | Two normal cars side by side. The most common double door in America. |
| 10x10 | 10' | 10' | One vehicle with height — a lifted truck, a small RV, a box van. |
| 8x7 | 8' | 7' | One small car. Tight for anything wider than a sedan — mirrors are the problem, not the body. |
| 9x7 | 9' | 7' | One car or a normal pickup. The standard single door. |
| 10x8 | 10' | 8' | One full-size truck or SUV with a roof rack. |
| 16x8 | 16' | 8' | Two vehicles, one of them tall. The double door for a truck household. |
| 12x10 | 12' | 10' | A workshop bay, a boat on a trailer, a dual-wheel truck. |
| 12x12 | 12' | 12' | An RV, a lifted dually, a shop with a lift in it. |
| 10x7 | 10' | 7' | One vehicle with room to open the door without touching the frame. |
| 18x7 | 18' | 7' | Two vehicles with real space between them. Common on newer builds. |
| 18x8 | 18' | 8' | Two vehicles, one tall, with room to walk between them. |
| 12x7 | 12' | 7' | One wide vehicle, or one car plus a workbench along the wall. |
| 20x10 | 20' | 10' | Two tall vehicles, or a commercial bay. |
| 20x8 | 20' | 8' | A wide double for a three-car garage's main bay. |
| 20x12 | 20' | 12' | An RV bay. This is a commercial-weight door on a house. |