How Big is a 12×20 Garage?
What Does 12×20 Actually Look Like?
This garage matches the footprint of a small studio apartment or large master bedroom. The 240 square feet provides enough space to park a mid-size sedan with room to walk around three sides of the vehicle. You can fit a compact car plus a full wall of storage shelving, or use the space for a motorcycle, lawn equipment, and workshop area when not storing a vehicle.
A 12×20 garage covers the same area as a typical two-car driveway but enclosed with walls and a roof.
A 12×20 garage provides 240 square feet of enclosed space, making it the standard size for a single-car garage with additional storage capacity. This dimension offers 4 feet more depth than the minimum 12×16 configuration, creating valuable extra room for storage, workbenches, or seasonal equipment. The 12-foot width accommodates most passenger vehicles with adequate clearance for door opening, while the 20-foot depth allows parking plus 4-6 feet of storage space behind the vehicle.
This garage size works well for homeowners who need basic vehicle protection plus moderate storage functionality. The rectangular footprint fits efficiently on most residential lots without overwhelming smaller properties. Construction typically involves a concrete slab foundation, wood frame walls, and either a single 8×7 foot or 9×7 foot overhead door. The extra depth compared to minimal single-car garages makes this size significantly more practical for daily use, tool storage, and seasonal item organization.
What Fits in 12×20?
- Compact to mid-size car with 3-foot clearance on driver side
- Motorcycle plus full workshop setup
- Riding lawn mower and complete yard tool collection
- 8-foot workbench along back wall
- Floor-to-ceiling storage shelving system
- Chest freezer and utility storage
- Bicycles, sports equipment, and seasonal decorations
What Fits in a 12×20 Garage?
Vehicle Capacity
Fits one compact to mid-size car (up to 6.5 feet wide, 18 feet long) with adequate clearance for daily use
Door Configuration
Single 8×7 or 9×7 foot overhead door centered on 12-foot wall
Clearance
Minimum 18 inches on driver side, 12 inches passenger side, 2+ feet front and rear for walking space
Build vs Buy: 12×20 Garage
DIY Build
Requires concrete work, electrical, and roofing skills. Foundation and electrical typically need permits and professional work.
Pre-fab Kit
Pre-engineered kits include framing and materials. Still need foundation, electrical, and assembly labor or contractor.
Custom Built
Full contractor build with site preparation, permits, and finish work. Price varies significantly by region and material choices.
12×20 Garage Materials List
| Material | Quantity | Est. Cost |
|---|---|---|
| Concrete slab (4-inch thick) | 9 cubic yards | 1800 |
| Pressure-treated lumber framing | 2000 board feet | 2400 |
| Metal roofing or asphalt shingles | 350 sq ft | 800 |
| Garage door (8×7 steel) | 1 door with opener | 1200 |
| Vinyl or fiber cement siding | 480 sq ft | 1400 |
| Electrical service and outlets | Complete 100-amp panel | 1500 |
| Windows and entry door | 2 windows, 1 door | 800 |
| Insulation and drywall | Complete interior finish | 1200 |
How Much Does a 12×20 Garage Cost?
Expect to pay between $15,000 and $35,000 to build. Attached garages cost more due to integration with existing structure.
Common Uses for 12×20
Pro Tips
- ★ Install the garage door opener motor on the back wall instead of center-mounted to maximize overhead storage space in the shorter dimension.
- ★ Plan electrical outlets every 6 feet along the walls and include 240V service for electric vehicle charging or high-power tools.
- ★ Use the 20-foot depth strategically by creating zones: parking area, walkway, and dedicated storage/work area at the back.
Frequently Asked Questions
Can I fit an SUV in a 12×20 garage?
How much storage space remains after parking a car?
What's the minimum lot size needed for a 12×20 garage?
Bear With Me
The day everything changed, I was standing in a 12×20 space with nowhere to go. Uncle Ray had asked me to clean out his garage before the estate sale. Simple enough—I needed the cash, he needed help. What I didn't expect was finding Mrs. Chen from next door waiting inside, clutching a metal briefcase. "Your uncle said you'd understand," she whispered, pressing it into my hands. "Don't open it. Don't lose it. Someone will come." Before I could ask what she meant, she was gone. I stood there, briefcase growing heavy in my grip. The garage felt smaller than it looked from outside—I paced it off, maybe twelve feet wide, twenty deep. Just enough room for Uncle Ray's Civic and his workbench, but now it felt like a trap. The briefcase hummed. Actually hummed. I wanted to run, but her words kept bouncing around the concrete walls: someone will come, someone will come. My uncle's voice seemed to answer from somewhere: you'd understand, you'd understand. Two days later, I'm still here. Still waiting. The 240 square feet that once held my uncle's simple life now holds something else entirely. And every sound I make seems to repeat itself, just slightly delayed.