Cost to Build a Garage Calculator
Building a garage typically costs $40 to $140 per square foot in 2025. A standard 20x22 ft two-car detached garage runs $25,000 to $45,000 depending on finish level and region. This cost to build a garage calculator breaks the estimate into the garage itself, an optional apartment above, and labor cost to build a garage per square foot so you can compare contractor bids or plan a DIY budget.
Cost to Build a Garage by Size (2025 National Averages, Standard Finish)
| Size | Sq Ft | Basic ($55/sf) | Standard ($80/sf) | Premium ($110/sf) |
|---|---|---|---|---|
| 12x20 (1 car) | 240 | $13,200 | $19,200 | $26,400 |
| 20x22 (2 car) | 440 | $24,200 | $35,200 | $48,400 |
| 24x24 (2 car) | 576 | $31,680 | $46,080 | $63,360 |
| 30x30 (3 car) | 900 | $49,500 | $72,000 | $99,000 |
| 30x40 (3 car deep) | 1,200 | $66,000 | $96,000 | $132,000 |
How Much Does It Cost to Build a 30x30 Garage?
How much does it cost to build a 30x30 garage is one of the most-searched questions in garage planning. At 900 sq ft with standard finishes, expect:
- Basic ($55 per sq ft): $49,500
- Standard ($80 per sq ft): $72,000
- Premium ($110 per sq ft, heated and insulated): $99,000
Add $100,000 or more if you want a 900 sq ft apartment above the garage.
Cost to Build a 2 Car Detached Garage with Apartment
A cost to build 2 car detached garage with apartment estimate needs two numbers: the garage base (typically 20x22 or 24x24) and the upstairs living space.
- 20x22 garage standard: $35,200
- 440 sq ft apartment above at $120 per sq ft: $52,800
- Total: $88,000 national average
Premium finishes or larger apartments can push total project cost past $150,000. The upstairs apartment effectively doubles or triples your total investment but adds rental income or family suite value.
Labor Cost to Build a Garage per Square Foot
Labor cost to build a garage per square foot averages $17 to $32 in 2025, roughly 40-50% of total project cost. Labor-heavy items include concrete slab pouring, framing, siding, and garage door installation. Material-heavy items include the concrete itself, lumber, shingles, and the garage door opener.
| Finish Tier | Labor per sq ft | Material per sq ft | Total per sq ft |
|---|---|---|---|
| Basic | $17-22 | $33-38 | $50-60 |
| Standard | $22-28 | $48-58 | $70-85 |
| Premium | $28-32 | $75-82 | $105-115 |
Cost per Square Foot to Build a Garage with Apartment
Cost per square foot to build a garage with apartment typically runs $110-180 per sq ft when you blend the garage area and the upstairs living space. The upstairs drives the higher rate because it adds plumbing, HVAC, insulation, windows, kitchen, and bathroom. If the apartment has rental potential, the blended cost is still often below new stick-built home construction cost ($200-350 per sq ft).
Cost to Build a Garage in Minnesota
The cost to build a garage in Minnesota runs about 8 percent above national average because of cold-climate requirements: frost-protected footings (4 ft minimum in much of the state), spray-foam insulation, and in-floor radiant heat in many custom builds. A 20x22 standard two-car detached garage in Minneapolis suburbs runs $38,000-42,000, versus $35,200 national average.
Attached vs Detached
Attached garages save about 10 percent because they share a wall with the home, reducing framing, siding, and roofing. Detached garages offer more layout flexibility, can be placed to optimize driveway geometry, and are required on many lots with setback restrictions.
What Can Add or Remove Cost
Adds:
- Living space above: $80-160 per sq ft extra
- Heated / insulated: $6-10 per sq ft
- Epoxy floor finish: $3-7 per sq ft
- Windows and service door: $1,500-3,500
- Electrical service upgrade for EV charging: $1,500-4,000
Subtracts:
- Concrete slab-on-grade vs frost-protected footings: -$2-4 per sq ft
- Vinyl siding vs fiber cement: -$3-5 per sq ft
- Single garage door vs double-wide: -$800-1,500
- DIY labor (framing and finishing): -40% of total
Permits and Plans
Most municipalities require a permit for any garage over 100-200 sq ft, costing $150 to $1,500 depending on jurisdiction. Architectural drawings run $500 to $2,500 for a basic garage; $3,000-6,000 if an apartment is above.