Last updated: 2026-04-09
e.g. 2
Estimated Total Cost
$24,260 – $44,960
24 x 24 ft (576 sf) · Attached · 2 doors
Cost Breakdown
Tip: Attached garages share a wall with your home, which saves on framing and siding. However, building code requires a fire-rated wall and a self-closing door between the garage and living space. Check local zoning setback requirements before choosing your garage location.
12,800+ estimates calculated this month
Garage Building Cost Guide
Complete cost breakdown for new garage construction including slab, framing, and doors.
How Much Does It Cost to Build a Garage in 2026?
A new detached garage costs $25,000–$70,000 for a standard 2-car (24×24 ft) build, varying by materials and finishes.
- 1-car garage (12×24): $15,000–$35,000
- 2-car garage (24×24): $25,000–$55,000
- 3-car garage (36×24): $35,000–$75,000
- Per sq ft cost: $40–$70/sq ft (basic) to $70–$120/sq ft (finished with utilities)
Attached garages cost 10–15% less than detached because they share a wall with the house.
Key Takeaways
- 2-car detached garage: $25,000–$55,000
- Cost per sq ft: $40–$120 depending on finish
- Attached garages 10–15% cheaper than detached
Garage Slab & Foundation Costs
The concrete slab is 15–25% of total garage cost, typically a 4"–6" thick slab on compacted gravel with thickened edges for footings.
- 24×24 slab (4" thick): ~7 cubic yards of concrete = $3,500–$6,000 poured and finished
- Monolithic slab (slab + footing in one pour): Most common for garages
- Frost-protected footings: Required in cold climates, adds $2,000–$5,000
- Rebar/wire mesh: $0.50–$1.00/sq ft for reinforcement
Key Takeaways
- Slab = 15–25% of total garage cost
- 24×24 slab: $3,500–$6,000 complete
- Frost-protected footings add $2,000–$5,000
Garage Door Costs & Options
Garage doors range from $800–$5,000+ per door installed, and are the most visible feature affecting curb appeal.
- Single steel (non-insulated): $800–$1,500 installed
- Insulated steel: $1,200–$2,500 installed
- Wood/carriage style: $2,000–$5,000+ installed
- Opener: $250–$500 for chain/belt drive with smart features
An insulated garage door (R-12 to R-16) reduces heating costs by 10–15% if the garage is heated or shares a wall with living space.
Key Takeaways
- Insulated steel door: $1,200–$2,500 installed
- Opener with smart features: $250–$500
- Insulated door reduces heating costs 10–15%
Quick Answer: How Much Does a Garage Cost?
A standard 2-car garage (24x24 ft) runs $24,000-$50,000. A 1-car garage averages $12,000-$22,000. A 3-car garage runs $38,000-$75,000. Base cost is $35-$60 per square foot for the structure. Detached garages cost 10-20% more than attached. Permits, site prep, and finish upgrades are not included in those numbers.
Garage Cost by Size and Style
| Garage Size | Sq Ft | Attached Cost | Detached Cost |
|---|---|---|---|
| 1-Car (12x20) | 240 sf | $10,000-$18,000 | $12,000-$22,000 |
| 2-Car (24x24) | 576 sf | $22,000-$40,000 | $24,000-$50,000 |
| 2-Car Wide (24x30) | 720 sf | $28,000-$50,000 | $32,000-$60,000 |
| 3-Car (36x24) | 864 sf | $32,000-$60,000 | $38,000-$75,000 |
Costs include slab, framing, roofing, basic siding, and doors. Add 15-20% for insulation and drywall finish.
What Gets Left Out of Most Garage Bids
After 20 years in construction, these are the line items that show up as change orders after the contract is signed:
- Permit fees: Most bids don't include the $500-$2,000 permit cost. Ask upfront whether permits are in the number or separate.
- Site grading: If your lot slopes more than 12 inches across the footprint, budget $2,000-$8,000 for excavation before any concrete gets poured.
- Panel upgrade or subpanel: Adding a subpanel for a workshop or EV charger adds $1,500-$3,000 on top of basic electrical.
- Concrete finishing: A broom-finish slab is standard. Epoxy coating or a hard-trowel finish costs $3-$8/sf extra.
- Gutters and downspouts: Most garage bids skip them. Budget $600-$1,500 depending on garage size.
Use the concrete calculator to verify the slab estimate before you sign anything.
Related Calculators
- Concrete Calculator - Cubic Yards and Bags for the Slab
- Concrete Bag Calculator - How Many 80 lb Bags Do You Need?
- Framing Cost Calculator - Estimate Lumber and Labor
- Driveway Cost Calculator - Price Out a New Driveway or Apron
- Square Footage Calculator - Get Your Garage Footprint
Need a full bid ready to send? Try EstimationPro free - build the estimate, send the proposal, and follow up automatically until the job is won.
How to Use This Calculator
Select Garage Size
Choose a preset size (1-car 12x20, 2-car 24x24, 3-car 36x24) or enter custom length and width dimensions. The calculator auto-determines the number of garage doors.
Choose Attached or Detached
Attached garages share a wall with your home and are cheaper to build. Detached garages cost 10-20% more but offer more placement flexibility.
Configure Options
Add insulation ($1.50-$3/sf), drywall finish ($2-$4/sf), electrical ($1,500-$3,000), windows ($300-$800 each), and a man door ($400-$800).
Review Cost Breakdown
See itemized costs for foundation, framing, roofing, siding, garage doors, electrical, and all selected options with low-to-high ranges.
Garage Cost Formula
Total = Base Structure + Garage Doors + Options
Base Structure = Sq Ft x $35-$60/sf (+ 10-20% if detached)Where:
- Base Cost
- = $35-$60 per sq ft for foundation, framing, roofing, siding
- Garage Doors
- = $800-$2,500 per door installed
- Insulation
- = $1.50-$3.00/sf for batt insulation
- Drywall
- = $2-$4/sf for finished interior walls
- Electrical
- = $1,500-$3,000 for outlets, lighting, and opener circuit
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Frequently Asked Questions
How much does it cost to build a garage?
Building a garage costs $35 to $60 per square foot for the base structure. A 1-car garage (12x20, 240 sf) runs $12,000-$22,000. A 2-car garage (24x24, 576 sf) costs $24,000-$50,000. A 3-car garage (36x24, 864 sf) ranges from $38,000-$75,000. Add 10-20% for detached construction.
Is it cheaper to build attached or detached?
Attached garages are typically 10-15% cheaper than detached because they share one wall with the existing house. However, attached garages require a fire-rated wall and self-closing door between the garage and living space per building code. Detached garages avoid that requirement but need all four walls fully built.
How much does a garage door cost installed?
Garage doors cost $800 to $2,500 installed for a standard insulated steel door. Basic non-insulated doors start at $600. Premium insulated doors with windows run $1,500-$3,000+. A standard garage door opener adds $250-$500. Budget more for oversized or custom doors.
Do I need a permit to build a garage?
Yes, building a garage almost always requires a building permit. Permits typically cost $500-$2,000 depending on your jurisdiction and garage size. You must also comply with zoning setback requirements (typically 3-10 ft from property lines). Some HOAs have additional architectural review requirements.
Should I insulate my garage?
Insulation is worthwhile if you use the garage as a workshop, gym, or hobby space, or if it is attached to your home. Insulation costs $1.50-$3.00 per square foot for batt insulation. Add drywall finishing at $2-$4/sf for a clean interior. For attached garages, insulation also helps your home energy efficiency.
How long does it take to build a garage?
A typical garage build takes 2 to 4 weeks of active construction. The concrete slab needs 1-2 weeks to cure before framing begins. Framing, roofing, and siding take about a week. Electrical, doors, and finishing take another 1-2 weeks. Add 2-6 weeks for permitting before construction starts.
How much does a 24x24 garage cost to build?
A 24x24 detached garage (576 sq ft) typically costs $24,000-$50,000. That breaks down to roughly $3,500-$6,000 for the concrete slab, $8,000-$15,000 for framing and roofing, $4,000-$8,000 for siding and doors, and $2,500-$5,000 for basic electrical. Add 15-20% if you want insulation, drywall, or a finished floor.
How much does it cost to build a detached garage per square foot?
Detached garage construction runs $40-$75 per square foot for standard finishes. A basic unfinished shell (slab, framing, roofing, siding, doors) lands at $40-$55/sf. Add insulation and drywall and you are at $55-$70/sf. A fully finished space with HVAC and epoxy floor can reach $80-$120/sf. Labor is typically 40-50% of the total.
What is the cheapest way to build a garage?
The most affordable path is a prefab garage kit over site-built construction. Kits for a 20x20 garage start around $8,000-$12,000 for materials, but you still need a concrete slab ($3,000-$5,000) and assembly. Full-build costs on a prefab kit run $18,000-$30,000. Stick-framing gives more flexibility but typically costs 20-30% more.
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