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All Garage Calculators

Every free calculator on GarageCalculator.com in one place. Each one uses 2026 national-average prices, lets you adjust for your region, and breaks the total into line items you can print or email.

Build a garage

Price a new garage, addition or outbuilding from the slab up.
Garage Cost CalculatorDetached garage cost by size, materials and finishes.Open calculator → Garage Addition CostAttached garage addition prices by size and features.Open calculator → Pole Barn CostKit, shell and turnkey pole barn prices per square foot.Open calculator → Carport CostNew carports, plus converting a carport into a garage.Open calculator → Concrete Slab CostSlab cost per square foot, cubic yards and bags.Open calculator → ADU Construction CostDetached ADU and apartment-over-garage costs.Open calculator → Septic System CostSeptic tank and drain field prices for a new build or ADU.Open calculator → Garage Loan CalculatorMonthly payments and financing options for your project.Open calculator →

Garage doors

Compare door, opener and repair prices before you call an installer.
New Garage Door CostDoor prices by size, material, insulation and opener.Open calculator → Garage Door Opener CostChain, belt, direct-drive and wall-mount openers installed.Open calculator → Garage Door Repair CostSpring, cable, panel and opener repair prices.Open calculator →

Upgrades and improvements

Finish, power, heat and protect the garage you already have.
Garage Insulation CostWalls, ceiling and door insulation, DIY or pro.Open calculator → Garage Heater SizeBTUs needed, heater cost and monthly running cost.Open calculator → EV Charger Installation CostLevel 1 and Level 2 charger, wiring and panel costs.Open calculator → Garage Floor Epoxy CostEpoxy, polyaspartic and flake floor coating prices.Open calculator → Garage Roof Replacement CostShingle, metal and flat roof replacement prices.Open calculator → Garage Conversion CostTurn a garage into a bedroom, office or living space.Open calculator → Driveway CostConcrete, asphalt, gravel and paver driveway prices.Open calculator →
NEW · 2026 EDITIONPlanning a detached garage? Get the Builder’s Kit.A 16-page build guide with 2026 costs, a budget and project tracker that scales to your garage, plus a printable checklist, contractor hiring kit and design worksheets.
$33See What’s InsideInstant download

Pricing across all calculators was last updated October 2026. Prices vary by region and contractor; always get written quotes.