Width and height
Measure the finished opening width and height. Check more than one spot if the framing or floor looks uneven.
Sizing guide
Garage Door Sizes Guide
Garage door size affects the door, tracks, springs, opener, weather seal, and installation plan. This guide explains common single-car and double-car sizes, custom openings, and what to measure before replacing a door.
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Common residential garage door sizes
Most New Jersey homes have either a single-car opening, a double-car opening, or two single doors. Older homes, additions, sloped floors, and custom garages can vary, so measurements should be confirmed before ordering a replacement door.
| Door type | Common widths | Common heights | Notes |
|---|---|---|---|
| Single garage door | 8 or 9 feet | 7 or 8 feet | Common for one-car bays. |
| Double garage door | 16 feet | 7 or 8 feet | Common for two-car garages. |
| Custom garage door | Varies | Varies | Needs careful measurement and hardware review. |
Those are starting points, not ordering instructions. The exact opening, framing, floor, track, and opener setup still matter.
How to measure for a garage door
Headroom
Headroom is the space above the opening. It affects the track setup, spring system, and opener clearance.
Side room
Side room is the space beside the opening. Tracks, brackets, and hardware need room to sit correctly.
Backroom
Backroom is the space from the opening back into the garage. The horizontal tracks and opener rail need enough depth.
Floor and seal
Uneven concrete, gaps, and settled floors affect the bottom seal and final fit.
Door weight
Insulation, windows, and material change door weight, which affects spring sizing and opener strain.
When professional measurement is worth it
Call for measurement help if the opening is older, the door is not a standard size, the floor is uneven, the tracks look unusual, or you are adding windows, insulation, or a heavier door style.
FAQs
What are standard garage door sizes?
Common single garage doors are often 8 or 9 feet wide by 7 or 8 feet high. Common double garage doors are often 16 feet wide by 7 or 8 feet high.
What is a single garage door size?
A typical single-car garage door is often 8 by 7, 9 by 7, 8 by 8, or 9 by 8 feet, but older homes and custom openings can vary.
What is a two car garage door size?
A common two-car garage door is 16 by 7 or 16 by 8 feet. Some garages use two separate single doors instead.
Can I order a custom garage door size?
Yes, many openings can be handled with custom sizing, but the opening, tracks, spring system, and opener compatibility should be checked first.
How do I measure a garage door opening?
Measure the width, height, headroom, side room, backroom, and floor condition. For replacement doors, professional measurement helps avoid ordering mistakes.
Need help with your garage door?
Call Literally Garage Door for a free estimate and practical next step.