Standard Garage Door Sizes: Complete Guide for Homeowners
When it comes time to replace or install a new garage door, the first thing you need to do is identify the size of the garage door you need. Choosing the right size is crucial for functionality, curb appeal, and resale value.
We’ll cover everything you need to know about standard garage door sizes, measurement tips, single vs double options, custom sizes, and what to consider before making a purchase.
Why Garage Door Size Matters
A garage door isn’t just an entry point — it’s one of the most visible features of your home. The right size ensures:
- Safe vehicle clearance for cars, SUVs, or trucks.
- Energy efficiency, with the proper fit and insulation.
- Curb appeal, since a door that’s too small or too large can throw off your home’s balance.
- Resale value, as buyers expect standard sizes that accommodate modern vehicles.
Standard Garage Door Sizes for Single-Car Garages
Most single-car garages are designed to fit one vehicle, whether it’s a compact car or a small SUV.
Common Single-Car Dimensions
- 8 feet wide x 7 feet high – Traditional standard size, ideal for smaller cars.
- 9 feet wide x 7 feet high – More popular today, offering additional clearance for mid-sized vehicles.
- 10 feet wide x 7 or 8 feet high – A good option if you have larger SUVs or plan to upgrade vehicles in the future.
Pro Tip: If you’re building new, always size up when possible. The extra foot of clearance makes everyday use much easier.
Standard Garage Door Sizes for Double-Car Garages
Double-car garages are common in modern homes, providing space for two vehicles side by side.
Common Double-Car Dimensions
- 16 feet wide x 7 feet high – The most common size for two cars.
- 16 feet wide x 8 feet high – Provides extra headroom for taller vehicles or roof racks.
- 18 feet wide x 8 feet high – Often chosen for oversized garages or wide driveways.
If you regularly park large trucks or SUVs, consider an 18-foot-wide door for maximum maneuverability.
Oversized and Custom Garage Door Sizes
Not every garage is built to standard dimensions. Many Portland homeowners with RVs, trailers, or lifted trucks need custom garage doors.
Oversized Options
- RV Garage Doors – 12 to 14 feet wide, with heights up to 12–14 feet.
- Commercial-Style Doors – Often 20+ feet wide for workshops or multi-vehicle garages.
Why Go Custom?
- Unique architecture or older homes with non-standard openings.
- Specialty vehicles (boats, campers, tall vans).
- Added storage needs for sports gear or equipment.
Custom garage doors can be built in almost any size, but installation requires precise measurement.
How to Measure Your Garage Door Opening
Getting accurate measurements is the first step in choosing the right door. An incorrect measurement can lead to costly returns or installation delays.
Step 1: Measure the Width
- Measure across the widest point of the opening.
- Take measurements at the top, middle, and bottom — use the smallest number for accuracy.
Step 2: Measure the Height
- Measure from the floor to the top of the opening.
- Again, take three measurements and use the smallest.
Step 3: Check Side Room
- Measure the space on both sides of the opening (usually 3.5–5.5 inches needed for tracks and sensors).
Step 4: Measure Headroom
- Distance from the top of the opening to the ceiling.
- Standard openers require at least 12 inches, but it is highly recommended to have 15+.
Step 5: Measure Backroom
- Depth of the garage from the opening to the back wall.
- Should be at least the height of the door plus 18 inches.
Always measure twice to ensure accuracy before ordering your new door.
Insulated vs. Non-Insulated Garage Doors
When considering garage door sizes, insulation is another key decision.
Non-Insulated Doors
- Usually 1/8-inch thick steel panels.
- Budget-friendly, but less energy-efficient.
Insulated Doors
- 1/2-inch or thicker foam insulation between steel layers.
- Quieter operation, stronger, and better for Portland’s rainy winters.
If your garage is attached to your home, investing in an insulated door can be worthwhile to lower your heating bill.
Standard Garage Door Sizes by Home Type
Different home layouts influence what size door you’ll need:
- Older Portland Homes – Often feature narrower single-car garages (8×7).
- Newer Suburban Homes – Typically have 16×7 or 16×8 double doors.
- Custom Homes – May include oversized or multi-bay garage doors.
Frequently Asked Questions About Garage Door Sizes
Will a 7-foot garage door fit an SUV?
Can I replace a single-car door with a double?
Are garage door sizes universal across the U.S.?
What size door do I need for a lifted truck?
Local Considerations for Portland Homeowners
Living in the Pacific Northwest adds a few extra factors:
- Climate – Insulated doors protect against damp, cold winters.
- Older Homes – Many Portland homes built before the 1950s may not align with today’s standard garage door sizes.
- Building Codes – Always verify local permit requirements before structural modifications.
Choosing the Right Standard Garage Door Size
When deciding on a garage door, consider:
- Current vehicle size (and possible future upgrades).
- Storage needs (sports equipment, tools, bikes).
- Resale value (buyers prefer standard sizing for modern vehicles).
- Budget (custom doors cost more but add flexibility).
Final Thoughts
Understanding standard garage door sizes is essential for homeowners planning a new installation or replacement. Whether you’re fitting a compact single-car door or designing a custom oversized option, the right choice ensures safety, efficiency, and curb appeal.
If you’re in the Portland area and aren’t sure what size you need, our experts can help. We’ll measure your garage, recommend the best options, and provide professional installation — so you can enjoy a perfect fit the first time.