Garage Cost Calculator

How This Garage Cost Calculator Works

The calculator prices a detached garage (a freestanding building, not attached to your house) one component at a time: site prep, foundation, framing, roofing, siding, garage doors, windows, electrical, interior finish, permits, and the general contractor’s fee. Each line is split into materials and labor using 2026 national-average installed prices, then adjusted for your region, site, and finish level. Wall area, roof area, and siding are calculated from your actual width, depth, and wall height, so a taller or longer garage is priced correctly instead of just multiplying square footage by one number.

Check a box under What will you do yourself? and the labor for that part drops out of the estimate, so you can see exactly what DIY work or managing the build yourself is worth. Treat the result as a planning budget. Your final price depends on local labor rates, soil conditions, design details, and the bids you receive.

How Much Does It Cost to Build a Detached Garage in 2026?

Most detached garages cost $60 to $90 per square foot to build in 2026 when they’re finished, permitted, and wired for lights and outlets. A standard 24×24 two-car garage typically runs $37,000 to $48,000. A bare shell with no electrical and no interior finish costs less, while insulation, drywall, plumbing, or a living space above can push the price well past $100 per square foot.

Notice that smaller garages cost more per square foot. Every garage needs a door, permits, an electrical feed, and a crew to show up, and those fixed costs are spread over fewer square feet on a one-car build. Going from 20×20 to 24×24 adds 44% more space for roughly 25% more money, which is why many builders recommend sizing up if your lot and budget allow.

Where the Money Goes: Garage Cost Breakdown

Here’s how the budget splits for a standard 24×24 two-car garage at about $41,800:

Framing and the foundation together make up more than 40% of the cost, and they’re the two phases where lumber and concrete prices hit hardest. To dig into the slab specifically, see our guide to the cost to build a garage foundation, or answer six quick questions to pick the right foundation type.

What Changes the Cost the Most

• Size and wall height. Square footage drives the slab, roof, and floor costs. Wall height drives framing and siding. Raising walls from 9 to 12 feet for a car lift or a taller door adds roughly 15–20% to those line items.
• Where you live. Labor in high-cost metros can run 35–40% above the national average, while rural areas often come in 10–15% below it.
• Your site. A flat, cleared lot is cheap to prep. Slopes, trees, rock, or poor soil can add several thousand dollars in excavation, fill, and retaining work before the slab is poured.
• Distance from the house. Power and water have to be trenched out to a detached garage. Every extra foot adds roughly $20–$45 depending on what’s in the trench.
• Doors and exterior finish. A carriage-style double door can cost nearly twice as much as a basic steel one, and brick veneer costs about four times as much as vinyl siding.
• What happens inside. Insulation, drywall, a 240V subpanel, a mini-split, plumbing, or a finished room upstairs turn a car shelter into usable space, and each one is a real line item in the budget.

7 Ways to Save Money on a New Garage

1. Be your own general contractor. GC overhead and profit typically add 10–20% to a project. Hiring and scheduling the subcontractors yourself takes time, but it was worth the savings for me. Read this book to learn the basics of each construction phase, then find vetted local pros through Angi (formerly HomeAdvisor). Craigslist contractors are usually cheaper, but I’d avoid them.
2. Get labor-only bids and buy the materials yourself. This lets you use discounted Home Depot and Lowe’s gift cards and coupons (often available on eBay), and you can stack an extra percentage back on online orders through Rakuten.
3. Put big purchases on a rewards card. Cards from issuers like Chase and Discover offer bonus categories and sign-up bonuses that can be worth hundreds of dollars on a materials order this size. Pay the balance in full so interest doesn’t wipe out the reward.
4. Buy proven plans instead of paying for a custom design. Stock garage plans cost a fraction of an architect’s fee and usually include the framing details your permit office will ask for.
5. Keep the design simple. A rectangular footprint, a gable roof, standard 16×7 or 9×7 doors, and vinyl or metal siding are the cheapest combination to build. Every corner, dormer, and custom size adds labor.
6. Rent the expensive tools. Rent a framing nailer, a concrete mixer, or a skid steer from Home Depot for the days you need them, or buy used and resell when you’re done.
7. Do some of the labor yourself. Painting, insulation, siding, and interior finish are the most DIY-friendly phases. With the right tools, this book, and enough videos, many homeowners frame and roof the whole building, too. Our step-by-step guide on how to build your own garage walks through each phase.

Compare Local Garage Builders

Ready to turn your estimate into real numbers? Get at least three bids, and give every builder the same size, materials, and options so the quotes are easy to compare.

Choosing the Right Garage Size

Size is the biggest cost decision you’ll make, so plan around the vehicles and gear you’ll actually store, plus what you might own in ten years. Typical vehicle lengths:

• Compact or midsize car: 14–16 feet
• SUV or minivan: 16–17 feet
• Full-size crew-cab pickup: 19–21 feet

A one-car garage should be at least 12 feet wide, and 14 feet gives you room to open doors comfortably. Two-car garages range from 20 to 24 feet wide, with 24×24 the most popular size because it fits two vehicles plus a narrow workbench. Allow 22–24 feet of depth for full-size trucks, add about 4 feet for shelving or bikes, and add 8 feet or more for a real workbench, a freezer, or lawn equipment. Boats, campers, and RVs usually need 32–40 feet of depth, a 12- to 14-foot-tall door, and walls at least 14 feet high.

Want to see how your cars fit before you commit? Lay out one-, two-, and three-car options with our garage size planner and visualizer. Picking a door width? Read why most homeowners get garage door widths wrong first.

Popular Detached Garage Types and What They Cost

Standard Two-Car Garage

The most common build in the country: a 24×24 slab-on-grade building with a gable roof, one double door, a walk-in door, a couple of windows, and basic lighting. Expect roughly $37,000–$48,000 with a contractor, or about $32,000–$42,000 for a bare shell with no electrical. A detached garage usually costs a bit more per square foot than an attached one because it needs four full walls, its own foundation, and a utility trench from the house.

Garage with a Storage Loft

Attic-style trusses and a plywood deck create an upper storage floor without the cost of finishing it. A loft typically adds $8,000–$12,000 to a 24×24 garage, bringing the total to about $45,000–$59,000. A gambrel (barn-style) roof gives you even more usable loft headroom for a modest premium.

Garage with an Apartment Above

A finished living space over the garage, often called a carriage house, needs a kitchen, bathroom, HVAC, insulation, stairs, and stricter code compliance. The upstairs typically costs $145–$240 per square foot on its own, so a 24×24 garage with a full apartment above often lands between $140,000 and $190,000. It’s still cheaper per square foot than a standalone ADU because it shares a foundation and roof. Get the full picture in our guide to the cost to build a garage with an apartment or run the numbers with the ADU cost calculator.

Workshop Garage

Add a 240V subpanel, insulation, drywall, a mini-split, and an epoxy floor, and a 24×24 garage becomes a year-round shop for about $55,000–$72,000. Planning an EV charger? Size the subpanel for it now; see our EV charging planning guide. For floors, compare options in the best garage flooring options for 2026.

RV and Boat Garage

Tall walls, a 12×14 overhead door, and a 40-foot-deep slab put a single-bay RV garage around $50,000–$66,000. Pole-barn or steel-kit construction on a gravel or thin-slab base can bring that down if you only need covered storage.

Permits, Zoning, and Setbacks

Almost every town requires a building permit for a new detached garage, and many require separate electrical and plumbing permits. Before you buy plans or collect bids, call your local building or zoning office and ask about:

• Setbacks from property lines, the house, easements, and septic fields
• Size and height limits for accessory buildings, and maximum lot coverage
• Frost depth and foundation requirements, which decide whether a simple slab is allowed
• Rules for living space, since an apartment above usually triggers ADU, parking, and utility rules
• HOA approval, if you have one, which often covers siding, roofing, and door style

Permit and plan-review fees for a typical garage run from about $600 to $2,500, and you should expect inspections at the footing, framing, electrical, and final stages. Building without a permit can mean fines, forced removal, and trouble when you sell the house.

Detached Garage Design Checklist

1. Decide what it’s really for. Parking, storage, a shop, a gym, or a future rental each need different sizes, power, and finishes. Settling this first tells you which permits and trades you’ll need.
2. Plan power for the future. Running a bigger feed from the house costs far less during construction than adding it later, especially if you’ll want an EV charger or 240V tools.
3. Ventilate. Car exhaust, gas cans, paints, and solvents all need fresh air. Plan for ridge and soffit vents at a minimum, and an exhaust fan if you’ll work inside.
4. Think about comfort. If you’ll spend time out there, budget for insulation and heating or cooling up front. Our guide to the cheapest way to insulate a garage covers the options.
5. Get the doors right. Insulated steel doors are the best value for most climates. Compare styles and prices with the garage door cost calculator.
6. Protect the floor and the drive. Slope the slab toward the door, seal or coat the concrete, and budget for the driveway that connects the garage to the street. Use the driveway cost calculator for that piece.

Is a Detached Garage Worth It?

For most homeowners, yes. A well-built garage adds secure parking and storage, protects your vehicles, and is one of the features buyers look for. You won’t always recover the full cost at resale, but a garage that’s wired, insulated, and permitted can double as a workshop, home gym, or office, and one built with a legal apartment above can generate rental income. If you’re financing the project, estimate your monthly garage loan payment before you sign a contract. Thinking about converting it to living space later? The garage conversion cost calculator shows what that step would cost.

Pricing last updated October 2026 using national-average material and labor costs. Prices vary by region and contractor; always get written bids before you build.