Guide
Two car garage door dimensions
One 16 ft door, one 18 ft door, or two singles. The choice changes parking, framing and what breaks.
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Written by HyreGarage Research Desk Primary-source research and fact checking
The short answer
Two car garage door dimensions are usually 16 feet wide by 7 feet high.
The common step-ups are 18 feet wide for two large vehicles and 8 feet high for taller ones, all within Clopay’s standard sizes.
The alternative is two single doors, 8 or 9 feet wide each, with a post between them. Both work; they trade parking room against redundancy.
Key takeaways
is the usual two-car door.
gives two large vehicles room.
for trucks and vans.
need a center post and two openers.
the wall must fit the door plus sideroom each side.
How much wall does a two-car door need?
Add the door, the sideroom and any post.
192 in of door plus 3¾ in each side: about 199.5 in, or 16 ft 7½ in of wall (HyreGarage calculation from Clopay’s sideroom figure).
216 in of door, sideroom at both outer jambs and both sides of the post, plus the post itself.
Door height plus 10 to 12 in of headroom, plus opener room (Clopay).
Backroom is door height plus 18 in for the door (Clopay), and the opener needs more.
Exact figures come from the track and opener manuals.
Double door or two singles?
Each wins somewhere.
| Setup | Trade-off |
|---|---|
| One 16 ft door | No post to hit. One opener. One set of springs. If it fails, both bays are stuck. |
| One 18 ft door | Easier for two large vehicles. Heavier door, bigger springs. |
| Two 8 ft singles | Tight for trucks. A failure leaves one bay working. Two openers. |
| Two 9 ft singles | Trucks fit each bay. Needs a wider wall than a 16 ft door. |
HyreGarage analysis. Wall width needed = door widths + post + sideroom; Clopay lists 3¾ in sideroom per side for standard springs. Between two singles, each door needs its own sideroom at the post.
Which should I choose for a new garage?
For daily parking of two cars, one 16 or 18 ft door is easier to drive through. If one bay is a workshop or you want a backup if one door fails, two singles make sense. If you drive a full-size truck, choose 18 ft or two 9 ft doors.
What to ask before you sign
The full ten-point checklist is on choosing a garage door company.
Where this goes wrong
It works, but tightly. 18 ft gives room to open doors.
Two singles take more wall than their widths suggest.
Heavy doors need the opener their maker rates.
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Tell us about the work
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Free, with no obligation: a person at HyreGarage reads it and replies. Matching is not live yet, so this is not a quote or a dispatch line. If a spring has snapped or the door is off its track, leave it closed and call a local garage door company now.
Find a Garage Door Professional
A person at HyreGarage reads the request and replies. Matching is not live yet, so this is not a dispatch line.
Questions
What size is a standard two car garage door?
Is an 18 ft garage door worth it?
How wide should a two car garage be?
Is a double door heavier than two singles?
Can I replace two singles with one double?
Written and audited by
HyreGarage Research Desk
Primary-source research, data analysis and fact checking
We are not a garage door company. We read the agency file, the code record, the standards document or the public register ourselves, compute the figure from it, and publish it with the source and the date we retrieved it.
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Sources & retrieval dates
Information on this page is general and varies with the door, the opener, local code and circumstance. It is not safety, insurance or legal advice.
Springs and cables hold dangerous stored energy: adjusting or replacing them is work for a trained technician. HyreGarage does not repair, replace or install garage doors.
This page explains the work so you can judge a quote and a company.