Garage Conversion Cost Calculator

This free garage conversion cost estimator prices the floor, walls, comfort systems and any bath or kitchen line by line, based on what your garage becomes. Adjusted for your state.

Prices reviewed September 2026
Adjusted for all 50 states
No sign-up to see your number

Step 1 of 4

Your garage

Size and future use.

Where is the project?

Labor costs differ a lot by state. This adjusts every line.

Garage size

sq ft

A one-car garage is about 200–250 sq ft. A two-car is 400–500.

180 sq ft900 sq ft

What will it become?

Estimated garage conversion cost

$41,600

$26,100 – $57,000

How we calculate your garage conversion cost

We price the project line by line: demolition, cabinetry or fixtures, finishes, labor, permits, and a contingency buffer. Every line has its own low and high unit price, so the range you see comes from real spread in the market, not a flat percentage. Labor is then adjusted by state, and materials move far less by location than labor does.

Unit prices are national benchmark ranges last reviewed September 2026. Treat the result as a planning number for setting a budget and judging contractor bids. It is not a quote. Read our full methodology.

What a garage conversion estimate includes

Insulation, drywall, electrical, paint and flooring
Framing in the garage door opening
Insulated subfloor and heating or cooling (optional)
Bathroom or kitchen (optional, included for ADUs)
Permits (optional)

What the garage conversion estimate leaves out

Replacement parking or a new carport
Structural or foundation repairs
Utility upgrades beyond the listed items
Furniture and appliances

Garage conversion cost FAQs

How much does a garage conversion cost?

A simple conversion to a bedroom, office or gym usually runs $25,000 to $55,000. Adding a bathroom or kitchenette raises it, and a full ADU with its own kitchen, bath and utilities often costs $80,000 or more.

Can I convert my garage into an ADU?

Often yes, but rules vary by city and state. An ADU adds separate utilities, fire separation and heavier permitting, which is why it costs far more than a bedroom conversion.

Will I lose my parking spot?

Some cities require you to replace lost off-street parking. Check local rules before you plan the conversion, since replacement parking is a separate cost.

Do I need to raise the floor?

Garage slabs slope toward the door and are usually colder than house floors. An insulated raised subfloor levels and warms the space, and most homeowners choose it.

Does the estimate include permits?

Yes, unless you turn them off. Converting a garage almost always requires a building permit and inspections.

Read the garage conversion cost guide