Are you thinking about turning your garage into a livable space? A garage conversion can be a smart way to add square footage to your house without building an entirely new addition. But how much does this project cost in 2025?

Below, we’ll break down the average price to convert your garage, key cost factors, and what to expect from a garage conversion, whether you DIY the project or hire a professional.

How Much Does a Garage Conversion Cost?

On average, a garage conversion costs between $10,000 and $50,000 in 2025. Most people spend around $15,000 on a standard one-car garage conversion. The final price depends on factors like your location, the size of your garage, and how much work is needed.

A simple garage-to-bedroom conversion might stay on the lower end, while a full studio apartment with plumbing and HVAC could hit the higher range.

Garage Conversion Cost by Square Foot

The average cost per square foot for a garage conversion ranges from $50 to $150.

Garage Size	Low-End Estimate	High-End Estimate
One-car garage (200 to 400 sq. ft.)	$10,000 - $30,000	$20,000 – $60,000
Two-car garage (400 to 600 sq. ft.)	$20,000 - $60,000	$30,000 - $90,000
Oversized garage (>600 sq. ft. or full studio conversion)	$30,000 - $90,000	>$90,000 or more

Keep in mind that higher-end finishes or major plumbing upgrades can push costs even higher.

What Affects the Cost of a Garage Conversion?

Several factors can raise or lower your total cost. Let’s break down the primary ones:

Size of the Garage

The bigger the space, the more money you’ll spend on the conversion. A single-car garage is cheaper to convert than a two-car garage simply because there’s less room to renovate. Larger spaces need more flooring, insulation, drywall, and possibly HVAC updates.

An empty garage with a white garage door and white storage shelves.

Building Permits and Local Codes

You’ll likely need a permit to convert your garage, especially if you’re changing its use or adding plumbing and electricity. Permit costs vary depending on where you live, but can range from a few hundred to a few thousand dollars. If your city has strict codes, that could mean more inspections, delays, or added work.

Materials and Finishes

Basic finishes (like carpet and standard drywall) are more affordable. But high-end flooring, custom cabinetry, or luxury lighting can quickly increase your total cost. Even small upgrades — like better windows or insulation — can add up fast.

Labor Costs

If you hire professionals for electrical, plumbing, HVAC, or general contracting, labor will be a big part of your budget. Labor rates vary by region but often make up 50% to 60% of the total project cost. Complex conversions that involve structural work or rerouting systems will cost more.

Plumbing, Electrical, and HVAC

If you’re turning the space into a guest room, laundry room, bathroom, or apartment, you’ll need to run plumbing and electrical lines and possibly expand or add an HVAC system. These upgrades can cost thousands of dollars, depending on the distance to existing connections and what needs to be installed.

Windows and Doors

Your garage might only have one or two windows, or none. If you want to add more natural light or plan to replace the garage door with a wall and entry door, you’ll need to factor in framing, materials, and installation costs. This can add several thousand dollars to your garage conversion project.

Garage Conversion Cost by Room Type

What you plan to use the garage space for plays a big role in the final price tag. Here’s a breakdown of common garage conversion types and what each one typically costs:

Bedroom: This is one of the most affordable options since it usually doesn’t require plumbing. You can expect to pay between $10,000 and $20,000.
Living room or family room: These conversions often need better insulation and upgraded electrical work. Costs usually fall between $15,000 and $30,000.
Home office: Depending on what you need, like soundproofing, built-in shelves, or extra outlets, a garage-to-office conversion typically costs $10,000 to $25,000.
Home gym: Adding rubber flooring, mirrors, storage, and workout equipment can bring your total to around $15,000 to $35,000.
Guest suite or studio apartment: These are the most expensive since they often require plumbing, HVAC, and sometimes a kitchenette. A complete studio conversion can cost $30,000 to $50,000, or more.

An unfinished renovation project shows walls of exposed building blocks and bricks, and roof structure.

Should You DIY or Hire a Professional?

If you’re handy and the conversion is simple (like turning it into an office or bedroom), you might save thousands with a DIY project.

But for bigger jobs, like adding plumbing, HVAC, or structural changes, it's best to hire licensed pros. Mistakes can cost more in the long run and may not meet building codes. Before starting the conversion project, think about:

Your skill level
Local permit requirements
Safety and code compliance
Time commitment

In most cases, it’s smart to at least consult a contractor for the trickier parts of the project.

Budget Smart for Your Garage Conversion

Converting your garage into a room is a smart way to add space without building an addition. Costs can range from $10,000 to $50,000, or more, depending on your specific needs. Whether you want a simple bedroom or a full guest suite, proper planning helps you stay on budget and avoid surprises.

Worried about repair or replacement costs after the conversion? A home warranty can help take care of covered systems and appliances in your new space. Get a free quote today and see how a home warranty can give you peace of mind after your garage conversion.

Garage Conversion Cost FAQs

How long does a garage conversion take?

Most garage conversions take 4 to 8 weeks, depending on the complexity of the conversion project. If you’re adding plumbing or making major structural changes, the conversion could take longer.

Is it cheaper to convert a garage or build an extension?

Garage conversions are usually cheaper. You’re working within an existing structure, which cuts down on framing and foundation costs.

Do I need a permit to convert my garage?

In most cases, yes. Permits ensure the work meets building codes. Check with your local building department before starting.

Does a garage conversion add value to your home?

Yes, a garage conversion can add value to your home. You’re increasing your livable square footage. Just make sure it’s done professionally and with the right permits.

The contents of this article are provided for general guidance only. First American Home Warranty does not assume any responsibility for losses or damages as a result of using this information.

Please be aware that if you disassemble a covered system or item, it can invalidate your home warranty or manufacturer's warranty.