Garage Door Dimensions: Standard Single & Double Car Sizes

A single-car garage door usually measures 8 feet wide by 7 feet tall, or 9 feet wide by 7 feet tall. The most common double garage door size is 16 feet wide by 7 feet tall.

Height can stretch to 7 feet 6 inches or even 8 feet in newer builds, especially where taller SUVs or roof racks need extra clearance.

More Post: YouTube Video Dimensions: Standard, Shorts & Thumbnail Sizes

Standard Garage Door Dimensions by Type

Standard Single Garage Door Dimensions

A single-car garage door usually measures 8 feet wide by 7 feet tall, or 9 feet wide by 7 feet tall. Some manufacturers also offer a 10-foot-wide option for larger sedans or trucks.

Height can stretch to 7 feet 6 inches or even 8 feet in newer builds, especially where taller SUVs or roof racks need extra clearance. An oversized single door — 16 feet wide by 7 feet tall — also exists for wide golf-cart bays or side-by-side parking in tight lots.

Standard Double Garage Door Dimensions

The most common double garage door size is 16 feet wide by 7 feet tall. Many builders install this as a single wide panel rather than two separate doors, since it needs only one garage door opener and creates a cleaner exterior look.

Taller versions run 16 by 8 feet, and wider double doors can reach 18 feet in homes with extra bay space. If you’re weighing two single doors against one double, know this: the total material cost is usually similar, but two singles need two separate openers.

Triple Garage Door Dimensions

Three-car garages rarely use one giant door. Instead, builders combine three single doors, or pair one double door with one single door. There’s no true “standard” triple-door size — the layout depends on your garage’s framing and driveway width.

Garage Door Size Chart

How to Measure Garage Door Dimensions Correctly

Before ordering any door, take four separate measurements. Skipping even one causes fitting problems during garage door installation.

Measuring the Rough Opening

The rough opening is the framed gap where the door will sit. Measure the width at its widest point, then add 1 inch on each side for hardware clearance.

For height, measure from the floor to the top of the opening in three spots — left, right, and center. Always use the smallest number, since garage floors are rarely perfectly level.

Measuring Side Room, Headroom & Backroom

Side room is the space beside the opening for tracks and springs. Standard torsion spring systems need 3¾ to 5½ inches per side.

Headroom — the gap between the door frame and ceiling — typically needs 10 to 12 inches, plus another 3 inches if you’re adding an automatic opener. Backroom, the depth from the door to the back wall, should equal the door’s height plus 18 inches minimum.

Garage Door Dimensions by Garage Size & Vehicle Type

Best Garage Door Size for a 1-Car, 2-Car, or 3-Car Garage

A 1-car garage typically pairs with an 8×7 or 9×7 door. A 2-car garage almost always uses a 16×7 double door. 3-car garages mix door types — commonly two single doors plus one double, or three matching singles across a 30-plus-foot-wide facade.

Matching Door Dimensions to Your Vehicle

Sedans and compact cars fit comfortably through an 8-foot or 9-foot door. SUVs and crossovers do better with a 9- or 10-foot width, especially with mirrors extended. Trucks, RVs, and lifted vehicles often require custom heights of 10 to 16 feet to clear roof racks, ladders, or camper shells.

What Size Garage Door for a 24×24 Garage?

A 24×24 garage — a common two-car footprint — almost always pairs with a 16-foot-wide by 7-foot-tall double door, leaving roughly 4 feet of wall space on either side for framing, insulation, and side clearance. Some homeowners instead install two 8-foot single doors for design symmetry, which works equally well in this footprint.

Custom Garage Door Dimensions vs. Standard Sizes

Not every garage fits the mold. Custom garage door sizes exist for a reason, and understanding when you need one saves both time and budget.

When You Need a Custom-Size Garage Door

RVs, boats, tractors, and lifted trucks often exceed standard height limits. Custom doors can reach 10 feet or taller, and irregular garage openings — common in older or converted structures — frequently need non-standard widths too.

Custom Garage Door Cost by Size

Standard doors typically run $750–$1,600 installed in the U.S., according to home-improvement cost data from Angi. Custom sizes push that range to $2,000–$5,000+, since manufacturers build panels, tracks, and springs to order rather than pulling from stock inventory.

Local Building Codes & Permit Requirements

Many U.S. municipalities require a permit for garage door replacement, especially when the opening size changes or structural framing is involved. Wind-load ratings also matter in hurricane-prone states like Florida and Texas, where codes mandate reinforced doors regardless of size. Always check with your local building department before resizing an opening.

Garage Door Thickness, Material & Insulation by Size

Size isn’t the only factor that affects performance — thickness and material shape how well a door insulates and holds up over time.

How Door Size Affects Insulation & R-Value

Larger doors, like 16-foot doubles, lose more heat per square foot unless properly insulated. Basic insulated doors use ¼ to ½ inch of foam; well-insulated doors sandwich 1 to 1½ inches of foam between two steel panels, according to guidance from The Home Depot.

Steel, Wood, Fiberglass & Vinyl: Which Fits Which Size Best

Steel remains the most common choice across all sizes — durable and budget-friendly. Wood suits smaller, single-car doors where craftsmanship stands out. Fiberglass balances cost and durability for wider doubles, while vinyl works well in humid climates regardless of door size.

Garage Door Dimensions FAQs

Is 9×9 a Standard Garage Door Size?

No. A 9×9 garage door isn’t a standard size in the U.S. market. Standard single doors max out around 9×7 or 9×8 — a 9-foot height is typically reserved for custom or oversized orders.

Is 10×10 a Common Garage Door Size?

Not commonly. 10×10 doors appear mostly in custom orders for taller SUVs, small RVs, or workshops needing extra vertical clearance. Standard catalogs rarely stock this exact size.

Is There a 20 ft Wide Garage Door?

Yes, but it’s considered oversized or custom, not standard. Most double doors top out at 16–18 feet; a 20-foot width usually applies to commercial garages, agricultural buildings, or three-car openings using a single panel.

What Size Garage Door for a 24×24 Garage?

A 16-foot by 7-foot double door is the standard fit for a 24×24 two-car garage, leaving enough wall space on each side for proper framing and side clearance.

Do They Make a 12×12 Garage Door?

Yes. A 12×12 garage door is a custom size, common for detached garages, workshops, or single-bay openings built to fit taller trucks and equipment.

How to Frame a 9×7 Garage Door Opening?

Framing a 9×7 opening starts with a rough opening slightly larger than the door — typically adding 2 inches to width and 1 inch to height for jambs and hardware. Use pressure-treated lumber for the bottom plate, install king and jack studs on each side, and set a header sized to support the roof load above. Local codes may require specific header sizing, so check with a building inspector before framing.