Garage Conversion Cost Calculator
Estimate the cost to convert your attached garage to livable space based on square footage, conversion type, and your state.
Last updated: March 25, 2026
Garage Conversion Cost Calculator
Estimate the cost to convert your attached garage to livable space based on square footage, conversion type, and your state.
Estimated Total
$19,000
Itemized Breakdown
This calculator provides estimates based on national averages adjusted for your region. Actual costs may vary significantly based on specific project conditions, contractor availability, material prices, and local market factors. Always get at least 3 quotes from licensed, insured contractors before starting your project.
Want the full picture?
Read our complete Garage Conversion cost guide with material comparisons, contractor tips, savings strategies, and regional pricing data.
Quick Cost Reference
Cost by Tier
Basic single-car garage conversion to a bedroom or home office. Insulation, drywall, flooring (LVP), new window, HVAC extension to existing system, and electrical outlets. No plumbing, no structural changes. Functional but not luxury.
Standard single-car garage to livable space (bedroom, office, or studio). Includes spray foam insulation, drywall, hardwood or tile flooring, HVAC mini-split for independent climate control, upgraded electrical, new exterior door, windows, and finishing work matching main house.
Double-car garage conversion to a full ADU, guest suite, or home gym with full bathroom. Includes plumbing rough-in and fixtures, kitchenette, mini-split HVAC, premium finishes matching the main home, proper egress windows, and full permit compliance for legal habitable space.