Overview: two layouts, one two-car garage
When people say single versus double garage door, they usually mean two scenarios for a two-car garage: a single 16-foot double door, or a pair of 8- or 9-foot single doors separated by a center post.
The double door is a single large panel covering both bays. Two single doors split the opening with a structural post between them. That post is the crux of the whole comparison, because it changes cost, flexibility and how you actually use the garage.
- One double door: lower cost, wider clearance, one opener, cleaner facade.
- Two single doors: more flexibility, built-in redundancy, better insulation, higher cost.
A 16-foot double door averages around $1,700 installed. Two single doors typically total $1,800 to $2,600 once you account for two doors, and possibly two openers.
The single double door in depth
A double door is the most popular choice for modern two-car garages because it is economical and gives you a wide, unobstructed opening. With no center post, you can pull in at an angle, park wider vehicles side by side, or move large items in and out without threading a needle.
Cost is the main draw. One door, one track system and typically one opener means you buy less hardware. The facade also reads as clean and contemporary, which many buyers prefer.
The tradeoffs are practical. Because there is no post, the header above a 16-foot opening must span a long distance, and very wide doors are heavier, which stresses springs and openers more. If the single opener fails, both cars are trapped. And the large single panel offers slightly less flexibility if you ever want to use one bay as a workshop while keeping the other closed.
Two single doors in depth
Two single doors deliver flexibility that one big door cannot. You can open one bay for a quick trip while leaving the other sealed, which is better for energy efficiency and security. If one opener or door fails, you still have a working bay, a redundancy that matters when a garage is your only entrance.
Smaller doors are also lighter and easier on their springs and openers, and the center post between them adds structural support to the header above. Aesthetically, two carriage-style single doors give a traditional, high-end look that suits many home styles.
The downsides are cost and clearance. You are buying two complete doors and often two openers, which pushes the total higher. The center post also narrows your usable entry, so backing out requires more care and you cannot move very wide loads through a single bay.
Cost comparison: single vs double
A 16-foot insulated steel double door averages roughly $1,700 installed. Two 8- or 9-foot single doors of the same material typically run $1,800 to $2,600 total, depending on whether you install one opener or two. Adding a second opener alone adds about $400 to $520.
On a strict dollar basis, the single double door usually wins by a few hundred dollars. But two single doors can narrow the gap on energy costs over time, because you only open one bay at a time and lose less conditioned air. For an attached, heated garage, that efficiency edge is worth factoring into the lifetime comparison.
Which should you choose?
Match the layout to how you live:
- Want the lowest cost and widest clearance? One double door.
- Value flexibility, redundancy and efficiency? Two single doors.
- Modern, clean facade? One double door.
- Traditional or carriage-house aesthetic? Two single doors.
- Garage is your primary entrance? Two single doors for the backup bay.
- Frequently move wide or bulky items? One double door.
Verdict
For pure budget and everyday convenience, a single double door is the winner for most two-car garages: it costs a few hundred dollars less, opens wide with no post in the way and looks clean. Choose two single doors when flexibility and resilience matter more than price, especially if the garage is your main entrance, you want to open just one bay at a time for efficiency, or you love the classic carriage-door look. Both are excellent, so let your priorities and facade style decide.
Single vs Double: installed cost for a two-car garage
| Configuration | Low | Average | High |
|---|---|---|---|
| One 16 ft double door | $1,100 | $1,700 | $3,200 |
| Two single doors, one opener | $1,500 | $2,100 | $3,400 |
| Two single doors, two openers | $1,900 | $2,600 | $4,000 |