Garage Conversion Cost Guide
Nationally, a garage conversion costs between $22,000 and $64,000, with a typical project landing around $38,000. One of the most cost-effective ways to add finished square footage without a foundation dig.
Want a number specific to your city? Every metro has its own labor and permitting costs.
Localize This Estimate →What makes up the total cost
Garage Conversion is one of the most cost-effective ways to add finished square footage without a foundation dig.
Six things that move the price
Material options
| Option | Notes |
|---|---|
| Basic finish (office/bonus room) | Insulation, drywall, flooring, minimal electrical |
| Full living space | Adds HVAC extension and finish-grade materials |
| Accessory dwelling unit (ADU) | Adds a bathroom and kitchenette, highest cost tier |
Garage Conversion cost in 20 major U.S. metros
Regional labor rates and permitting requirements move this estimate by as much as 65% between the least and most expensive metros in our dataset.
Should you DIY a garage conversion?
Garage Conversion isn't a realistic DIY project for most homeowners — it requires licensing, permitting, and inspection in most jurisdictions. Treat the contractor's labor line item as a fixed cost, and focus your cost control on getting multiple itemized quotes instead.
Resale value consideration
Homeowners recoup roughly 60% of a garage conversion's cost at resale on average, according to typical remodeling ROI benchmarks. See our guide on which renovations actually pay back the most for how to weigh that against your own timeline.
Garage Conversion FAQ
How much does a garage conversion cost?
Garage Conversion costs $22,000–$64,000 nationally, averaging $38,000 for a typical 400 sq ft scope. The number varies by metro — see the city breakdown above, or use our calculator for a localized figure.
Do I need a permit for a garage conversion?
Yes, in most jurisdictions a garage conversion requires a permit and inspection. Requirements vary by city and state — check our city guides for local permitting notes, or confirm directly with your local building department.
How long does a garage conversion take?
A typical garage conversion takes 4–8 weeks from start to finish, though scheduling around contractor availability and seasonal demand can extend the timeline before work even begins.
What's included in this garage conversion estimate?
The estimate covers the full scope of a typical project: primarily insulation & drywall (25%), flooring (15%), hvac extension (20%), plus the remaining categories shown in the cost breakdown above. See our methodology for exactly how these figures are built.
What most affects the price of a garage conversion?
Two of the biggest levers: intended use — living space, home office, or full accessory dwelling unit, and insulation and hvac extension into the space. See the full factor list above for everything that can move your number.
Does a garage conversion increase home value?
On average, homeowners recoup about 60% of the cost at resale, per typical remodeling ROI benchmarks. See our ROI guide for how to weigh that against your own timeline.