How Much Does It Cost to Build a Detached Garage?
$20,000 – $50,000
National average: $30,000 (2-car)
Interactive worksheet
Detached garage cost calculator
Set the scope, size, and state — the tally updates as you go. Built from this guide's figures and BLS state wage data.
01 Quality & scope
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State figures apply BLS construction wages (2025) at a 60% labor weight — how we estimate.
Your estimate
- Labor ≈60%
- $18,000
- Materials & equipment
- $12,000
- Planning range
- $27,000 – $33,000
low $20,000 $50,000 high
U.S. construction trades average $65,360/yr (BLS 2025).
Get three written bids. One far under $24,000 usually means missing scope — ask what's not included. Far over $36,000, ask what's driving the number.
A detached garage adds protected parking, storage, or workshop space without touching your house. Building one costs $20,000 to $50,000 in 2026 — about $40 to $70 per square foot — with size and finish level driving most of the range.
What you’re paying for
The bones are the bulk of it: a foundation slab, framing, roofing, siding, and the garage door. Then comes finishing — electrical, insulation, drywall, and any heating — which can add tens of thousands depending on how usable you want the space.
Size and finish set the price
A bare-shell 1-car garage is the low end; a 2- or 3-car with a finished, wired, insulated interior climbs fast. Adding a room above turns the project into something closer to an ADU.
Don’t forget permits and utilities
Detached garages need permits, and running power (or water) out to a standalone structure adds cost the house garage wouldn’t. Budget for both.
How to save on a detached garage
- Build a simple rectangle on flat ground to keep foundation costs down.
- Finish only what you’ll use — a shell now, wiring later.
- Stick to standard sizes for cheaper materials and trusses.
- Get permits upfront to avoid costly rework and resale headaches.
| Component | Typical range | Notes |
|---|---|---|
| Site prep & foundation slab | $3,000 – $10,000 | — |
| Framing & structure | $6,000 – $15,000 | — |
| Roofing & siding | $4,000 – $10,000 | — |
| Garage door(s) | $1,000 – $4,000 | — |
| Electrical, drywall, finishing | $3,000 – $12,000 | — |
| Option | Typical range | Notes |
|---|---|---|
| 1-car (12x20) | $15,000 – $30,000 | — |
| 2-car (20x20) | $25,000 – $50,000 | — |
| 3-car (30x20) | $40,000 – $70,000 | — |
| Garage with room above | $50,000 – $100,000+ | — |
What affects the price
- Size & number of bays Priced largely by square footage; each additional bay adds foundation, framing, roofing, and a door.
- Foundation & site A simple slab on flat ground is cheapest; grading, excavation, or a frost-depth foundation costs more.
- Finishing level A bare shell is cheapest; insulation, drywall, electrical, heating, and plumbing each add cost.
- Permits & utilities Permits, running power, and any water/sewer connections add to the base build.
- Living space above Adding a finished room or apartment over the garage roughly doubles the project — it's effectively an ADU.
Detached garage cost by state
Where you live moves the price as much as any option you pick, because labor is a big share of the bill and construction wages differ sharply by state. Adjusted with BLS wage data (2025), a typical detached garage job runs about $23,400 – $58,500 in Hawaii (+17%) versus $17,000 – $42,500 in Arkansas (−15%).
See the typical range in all 50 states + D.C.
| State | Typical range |
|---|---|
| Alabama | $17,400 – $43,500 |
| Alaska | $23,000 – $57,500 |
| Arizona | $19,000 – $47,500 |
| Arkansas | $17,000 – $42,500 |
| California | $22,400 – $56,000 |
| Colorado | $20,000 – $50,000 |
| Connecticut | $21,400 – $53,500 |
| Delaware | $19,600 – $49,000 |
| District of Columbia | $21,600 – $54,000 |
| Florida | $18,200 – $45,500 |
| Georgia | $18,400 – $46,000 |
| Hawaii | $23,400 – $58,500 |
| Idaho | $18,800 – $47,000 |
| Illinois | $23,000 – $57,500 |
| Indiana | $20,200 – $50,500 |
| Iowa | $19,400 – $48,500 |
| Kansas | $19,000 – $47,500 |
| Kentucky | $18,600 – $46,500 |
| Louisiana | $18,000 – $45,000 |
| Maine | $19,600 – $49,000 |
| Maryland | $20,000 – $50,000 |
| Massachusetts | $23,000 – $57,500 |
| Michigan | $20,000 – $50,000 |
| Minnesota | $21,800 – $54,500 |
| Mississippi | $17,400 – $43,500 |
| Missouri | $20,400 – $51,000 |
| Montana | $19,600 – $49,000 |
| Nebraska | $18,800 – $47,000 |
| Nevada | $20,600 – $51,500 |
| New Hampshire | $19,800 – $49,500 |
| New Jersey | $22,800 – $57,000 |
| New Mexico | $18,400 – $46,000 |
| New York | $22,000 – $55,000 |
| North Carolina | $18,000 – $45,000 |
| North Dakota | $20,200 – $50,500 |
| Ohio | $20,000 – $50,000 |
| Oklahoma | $18,200 – $45,500 |
| Oregon | $22,000 – $55,000 |
| Pennsylvania | $20,200 – $50,500 |
| Rhode Island | $20,800 – $52,000 |
| South Carolina | $18,200 – $45,500 |
| South Dakota | $18,000 – $45,000 |
| Tennessee | $18,400 – $46,000 |
| Texas | $18,200 – $45,500 |
| Utah | $18,800 – $47,000 |
| Vermont | $19,400 – $48,500 |
| Virginia | $19,000 – $47,500 |
| Washington | $23,200 – $58,000 |
| West Virginia | $19,000 – $47,500 |
| Wisconsin | $20,800 – $52,000 |
| Wyoming | $19,800 – $49,500 |
Estimates apply each state's BLS construction-wage multiplier to this guide's national range — a planning number, not a quote. Browse the full state cost guides or our methodology.
Frequently asked questions
- How much does it cost to build a 2-car detached garage?
- A standard 2-car detached garage (about 20x20) runs $25,000–$50,000 in 2026, or roughly $40–$70 per square foot. Finishing level — bare shell vs. insulated, wired, and heated — drives most of the spread.
- Is a detached garage cheaper than attached?
- Attached garages are often a bit cheaper per square foot because they share a wall and existing utilities. Detached gives more flexibility and placement options but needs its own foundation and utility runs.
- Does a detached garage add home value?
- Yes — a garage adds usable, weatherproof space and appeals to buyers, typically recouping a solid share of the cost. A garage with finished space above adds even more, though at a much higher build cost.
- Do I need a permit to build a detached garage?
- Almost always. Detached garages require building permits and must meet setback, size, and sometimes design rules. Permits and inspections are part of the cost — and skipping them causes problems at resale.
- How much to add a room above the garage?
- Adding finished living space or an apartment over a garage can push the total to $50,000–$100,000+, since it adds a second floor, insulation, HVAC, and often plumbing — essentially building an ADU.
How we estimate: ranges reflect typical U.S. pricing for materials and professional installation, compiled and cross-checked against the current (2026) industry sources listed below (see our data & methodology). Your actual cost depends on your location, project size, material grade, and local labor rates — always get multiple written quotes before you commit.
Sources
Cost ranges on this page were checked against current (2026) data from these industry sources:
- Cost to Build a Garage (2026) — HomeGuide
- How Much Does It Cost to Build a Garage? — Angi
- How Much Does It Cost to Build a Garage? — Bob Vila