Garage Conversion Budget Calculator

Converting a garage to living space costs Converting a garage to living space costs Converting a garage to living space costs Converting a garage to living space costs $10K-$35K typically. Adds sqft but can hurt resale in markets where garage is valued. This calculator sizes and helps evaluate.0K-$35K typically. Adds sqft but can hurt resale in markets where garage is valued. This calculator sizes and helps evaluate. Structural changes are the hidden cost — garage doors removed and replaced with proper walls need engineering review. Insulation R-value must meet code for conditioned space (typically R-19 walls, R-38 ceiling). Floor insulation often missed: raising the slab for conditioned living space adds $4-$8/sqft. Factor in landscaping rework if the driveway needs to change or parking must be added elsewhere.0K-$35K typically. Adds sqft but can hurt resale in markets where garage is valued. This calculator sizes and helps evaluate.0K-$35K typically. Adds sqft but can hurt resale in markets where garage is valued. This calculator sizes and helps evaluate. Structural changes are the hidden cost — garage doors removed and replaced with proper walls need engineering review. Insulation R-value must meet code for conditioned space (typically R-19 walls, R-38 ceiling). Floor insulation often missed: raising the slab for conditioned living space adds $4-$8/sqft. Factor in landscaping rework if the driveway needs to change or parking must be added elsewhere.

Garage sqft

Scope

HVAC extension cost

Permit cost

Total conversion cost

$25,000

Base conversion work

$22,000

How the math works

400 sqft standard conversion: $22,000 + $2,500 HVAC + $500 permit = $25,000. With bath/kitchenette: $33K+.

Before committing: check local zoning. Some areas require parking replacement (off-street spaces lost = adding pad elsewhere). HOA often restricts conversions.

How to Use

Enter garage sqft and conversion scope.
Add HVAC extension and plumbing if needed.
See total cost and resale consideration.

Frequently Asked Questions

Does it add home value?

Tricky. In dense urban (San Francisco, LA), adding living space beats garage. In suburban/rural, losing garage reduces value. Net: usually 40-60% cost recovery in suburban, 70-90% in dense urban.