A 20 x 20 garage costs about $33,600 to build in 2026 with a contractor, or roughly $84 per square foot for a standard small two-car garage with a concrete slab, asphalt shingles, vinyl siding, one 16 x 7 ft insulated steel door with an opener, and basic lights and outlets. Most homeowners pay between $29,500 and $38,600 depending on location, finishes and site work. Doing much of the work yourself can bring the cost down to about $17,700.
20 x 20 Garage Cost by Build Level
| Build level | Total cost | Per sq ft |
|---|---|---|
| Economy (basic door, budget materials) | $30,500 | $76 |
| Standard shell (most common) | $33,600 | $84 |
| Standard with insulation and drywall | $41,000 | $103 |
| Premium (metal roof, fiber cement siding, premium door) | $44,600 | $112 |
| Standard, you act as general contractor | $30,000 | $75 |
| DIY most of the work, electrician hired | $17,700 | $44 |
Cost Breakdown
Here is where the money goes on a standard 20 x 20 garage built by a contractor:
| Item | Cost |
|---|---|
| Site prep and grading | $1,600 |
| Foundation (monolithic concrete slab) | $4,400 |
| Framing and roof structure | $8,920 |
| Roofing | $2,420 |
| Siding and trim | $3,480 |
| Garage door and openers | $3,150 |
| Entry door and windows | $1,250 |
| Electrical (lights and outlets) | $4,200 |
| Permits and plan review | $600 |
| Contractor overhead and profit | $3,530 |
| Total | $33,550 |
Materials make up about $14,560 and labor about $14,860 of the total before permits and contractor overhead. Lumber, concrete and the garage door are the biggest material costs; framing and concrete finishing are the biggest labor costs. Price the foundation on its own with our concrete slab cost calculator.
What Fits in a 20 x 20 Garage?
A 20 x 20 garage is the smallest practical two-car garage. Two compact cars fit, but there is little room to open doors or walk around, and at 20 ft deep a full-size pickup will not fit with the door closed. It works well as a one-car garage with plenty of storage, or for two small cars where space is tight.
Tip: If your lot allows it, 22 x 22 or 24 x 24 is worth the extra cost. Most owners of 20 x 20 garages end up parking one car inside.
Options That Change the Price
- Frost wall foundation (required in many cold climates): about $2,300 more, for a total near $35,800.
- Sloped or difficult site: about $5,700 more for extra grading and fill.
- Metal roofing instead of shingles: about $1,200 more.
- Insulation and drywall: about $7,500 more. Compare options with the garage insulation cost calculator.
- Storage loft with attic trusses: about $5,500 more.
- Location: about $31,900 in the South and Midwest, and about $38,300 in the Northeast and Pacific Northwest.
- Driveway, EV charger and heat are extra. See the driveway, EV charger and heater calculators.
DIY vs. Hiring a Contractor
Hiring a general contractor to manage everything costs about $33,600. Managing the trades yourself saves roughly $3,500, and doing most of the work yourself, while hiring a licensed electrician, brings the total to about $17,700. Most DIY builders still hire out the concrete slab and often the roof trusses. Construction typically takes 4 to 6 weeks once the permit is approved.
Ready for real numbers? Get quotes from local garage builders and compare at least three bids for the same plans. If you still need plans, browse detached garage plans in this size.
Attached or detached? A 20 x 20 garage can also be built onto the side of the house, sharing one wall and the electrical service. Compare prices with the garage addition cost calculator. For an existing garage that needs a new roof, see the garage roof replacement cost calculator.
Compare Other Garage Sizes
| Garage size | Standard cost | Per sq ft |
|---|---|---|
| 12 x 24 garage | $28,100 | $98 |
| 16 x 24 garage | $32,200 | $84 |
| 20 x 20 garage (this page) | $33,600 | $84 |
| 24 x 24 garage | $41,800 | $73 |
| 30 x 30 garage | $55,200 | $61 |
Frequently Asked Questions
How much does it cost to build a 20 x 20 garage?
About $33,600 with a contractor in 2026, with most projects between $29,500 and $38,600. A DIY build costs about $17,700.
Will a pickup truck fit in a 20 x 20 garage?
Usually not. Most full-size pickups are 19 to 20 ft long, which leaves no room to walk around or close the door safely. Plan at least 24 ft of depth for a truck.
How much does a 20 x 20 garage cost per square foot?
About $84 per square foot for a standard build with a slab, a 16 ft door, vinyl siding and basic electrical.
Prices updated October 2026 using the GarageCalculator.com cost model and national-average material and labor rates. Prices vary by region, site and contractor; always get written quotes.
Great article. Well written and informative. Do you have any info available how how much it would cost to lengthen a harag by about 6-8 inches no roof work is needed. and a plan on how to do that?
Very good detail explanation on cost of building a 20×20 garage. Can you estimate a current price because my contractor is telling me it will almost be double that now?
As a builder, these prices are greatly under estimated. In Michigan supplies and materials alone for a 20×20 is roughly $9000, to have a concrete slab poured is $4500, and basic electrical is roughly $3000.
I really appreciate your knowledge re: building costs. Do you have any info on building a 20 x 20 garage in Birmingham AL? I’m considering this addition to a established house.
Thank you.
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