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How Much Does It Cost To Renovate Or Convert A Garage?

Typical Range: $5,946 - $20,605

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Garage Conversion Cost

Surveyed homeowners paid between $5,946 and $20,605 to turn their unused garage into habitable living space. On average, converting a garage costs $12,761.

The price of contracted labor is a major factor in the overall price. Most contractors charge a flat fee that’s based upon 10% to 20% of the final project cost, while hourly builders earn an average of around $15 per hour.

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National Average
Typical Range
$5,946 - $20,605
Low End - High End
$1,610 - $40,000

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Cost data is based on actual project costs as reported by 527 HomeAdvisor members in .
graphic with average cost to convert a garage between $1,600 and $40,000

Cost to Convert a Garage to Different Types of Spaces

SpaceAvg. Cost
Living Space or Family Room$5,000-$10,000
Apartment or Guest House$15,000-$30,000
Bedroom or Master Suite$10,000-$15,000
Office or Work Space$5,000+
Granny Flat$3,000-$30,000
Utility Room$6,000+

Living Space/ Family Room

Turning your garage into a family room can average anywhere between $5,000 and $10,000, depending upon whether you need to add a window. By law, your family room needs at least one window big enough to use as an emergency exit. There are also the costs of installing insulation, drywall, a drop ceiling and flooring, as well as adding heat and air.

Apartment/ Guest House

A full-scale apartment or guest house will take you to the top of your budget and beyond at an average between $15,000 to $30,000. You'll need to make all the upgrades mentioned for a family room, along with a separate bath and kitchen. You'll need to run a gas line or a 220 outlet for the stove. You'll also want a private entrance for your apartment, which usually entails adding a fire door.
garage converted into a bedroom

Bedroom/ Master Suite

The cost of a bedroom or master suite needs at least one window, a ceiling, insulation, drywall, flooring, heat and air, and a closet. If you're adding the master bath, factor in plumbing and a second window. Dreaming of a steam shower or a garden tub? Be prepared to pay an additional $10,000 to $15,000 in costs for a steam shower.


The cost to convert an existing space into a bathroom begins at $3,000. High-end renovations could cost as much as $25,000. Factor in the costs of insulation, drywall, flooring, plumbing, shower, tub, toilet, sink, faucets, and finishes to get a realistic estimate.


Adding a kitchen costs at least $6,000 for high-end finishes or appliances. It could require rerouting gas and water lines, relocating the washer and dryer and adding outlets powerful enough to run large appliances - all this in addition to the basic work needed to make the space family-friendly. You'll need countertops and storage too.
Check out our guide on the cost of new appliances.

Office/Work Space

The home office will cost at least $5,000, making it one of the more affordable options when it comes to converting your garage into living space. Like a bedroom, a home office needs all the basic amenities, such as walls, floors, and a ceiling. It needs climate control and a window. This room may also require additional outlets that let you connect computers, printers and charging stations. You'll need internet access and a high-speed connection, as well as lots of storage and organization options.

Granny Flat

Adding a granny flat will cost you nearly the same as adding a guest house at a range between $3,000 and $30,000. You'll need at least a full bath and kitchenette on top of living and sleeping spaces. You'll need heat and air, windows and a private entrance.

Utility Room

For a garage-to-utility-room conversion, budget at least $6,000 for appliances, a utility sink, and space for sorting, folding and hanging laundry. A new utility room in place of an old garage brings convenience into your life, especially if you've spent years dragging loads of laundry up and down the stairs. This conversion will cost a bit more due to the addition of plumbing, but it'll be worth it.
garage remodelers charge 10 to 20 percent of total project costs.

Single vs. Two-Car Garage Conversion Cost

The cost to convert a two-car garage averages $21,000 to $30,000. Custom structures, like adding a loft, can raise the price to as high as $50,000. A double garage runs about 22-feet wide by 20-feet deep.

The average size of a single garage is roughly 12-feet wide by 20-feet deep and will generally cost less to renovate, depending on the space and finished state of the garage.

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Renovation Cost Factors to Consider

garage in construction to convert into a living space
by Lux Renovations, LLC., Canton, MA. Garage conversion costs in Boston average $11,200.

As you move from the planning stage of your conversion toward execution, remember that doing the job well will add value to your home, while cutting corners may subtract value. Keep these considerations in mind and ask your contractor about each one that's relevant to your renovation goals:

Conversion Permit Cost

You may be required to purchase a permit from your state, county or municipal government. The average cost of obtaining a building permit falls in a range between $1,000 and $1,500. Your contractor should be knowledgeable regarding the permit process.


Adding insulation to the garage costs about $1 per square foot and is beneficial, especially if it is attached to your home or if you're planning to convert the space into a living area. Your contractor should offer advice on what type of insulation is best for your needs, where it should go, and how much you'll need.

Interior Walls

Since the space is already framed and has walls, you'll only need to budget for drywall hanging costs at $1,700 to $2,000, on average. This will keep your remodeled room as comfortable as the rest of your home.


The cost of installing five windows falls somewhere around $5,000, or about $1,000 per window. If your garage doesn't have any windows, plan to add at least one. This is especially important if you want to list it as a bedroom or rent it out. You'll need an egress window big enough for a person to escape through in case of a fire. Egress windows average about $3,500.

Heating & Cooling

Adding HVAC is another consideration for your garage renovation costs should you decide to make it into a usable space. Your garage may house some of your HVAC equipment, such as your furnace, but that doesn't mean the garage itself is heated or cooled. The price to install ducts and vents averages between $500 and $2,000.


Add between $75 and $500 to your budget for the cost of outlet installation. Most garages have electricity of some sort, even if it's just a bare bulb in the ceiling and a few outlets spaced around the walls. If you're trying to convert your garage into living space, you'll need a nearby licensed electrician to add more wiring and outlets for additional electrical devices.


Expect to spend anywhere from about $300 to $500 to install a wireless network. If you want your garage remodel to focus on office, studio, lounge, or living space, you may want Wi-Fi and other conveniences such as satellite or cable TV. It might be necessary to have your telecom provider come out to install the proper outlets.


If you want to turn your garage into a living space with a bathroom or kitchen, budget in the cost to install plumbing, or between $300 and $1,800. If you plan to add a sink, shower, or toilet to your garage remodel, it's wise to enlist the services of a licensed plumber near you to complete this portion of the work.

Interior Design

Hiring an interior designer costs most between $2,000 and $11,000. Once you get past the basics, total cost will vary based on what types of materials you choose to finish the room.
  • Flooring costs: $1,500-$4,500
    • Carpet and laminate: lower in cost
    • Hardwood and cement: more expensive
  • Bedroom: include the cost of a bed, dresser, nightstand and decorations.
  • Bathrooms: include the cost of a bathtub or shower, countertops and a mirror.
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Cost to Finish a Garage

The cost to finish a garage is often less than the cost of a remodel, coming in at an average of about $5,000. Finishes should factor high on your list of materials before you ever begin your garage conversion. The answers to the following questions will go far in determining your budget. Low-end finishes will save you big bucks at the time of renovation, but high-end finishes will help recoup your ROI when it comes time to sell.
  • Will you use tile or vinyl flooring?
  • Will countertops be composite or granite?
  • Drywall or paneling?
  • Wood cabinetry, veneer or aluminum?

"Not every idea works well in every home. Work with your remodeler to make great decisions for you and your specific space. You'll be looking at options that are actually available to you along with combining their expertise and experience to determine what best fits your budget, lifestyle and is feasible in your home." Jenna Porter, Senior Project Designer. Red House Remodeling, Des Moines, IA

Expanding a Garage

If you decide to expand your garage to make more room for tools or storage, this is considered adding on to your home, and costs will typically go up. Home addition costs fall between $20,000 and $70,000 for most homeowners, depending on the size and type of space built. Your contractor will frame out new walls and expand the room's foundation. If you intend to keep the space the same only reorganizing it, you may have only the costs associated with purchasing and installing shelving and cabinetry.

Effect on House Resale Value

If you're planning to maximize the space, add useful features, and otherwise make changes that are likely to appeal to a majority of homeowners, your renovation may end up being a worthwhile investment in your home's resale value. However, the quality of the work matters, especially if you're planning a major change such as converting the garage into a bedroom. Trading your garage space for a poorly insulated "bedroom" with no windows and the garage door intact won't do much to boost resale value.
The work you have done must be permitted, it must be professional and it must increase your home's functionality and appeal. Weigh what you're planning to spend against the expected increase in resale value to get your return-on-investment figure. A well-done garage conversion to living space can give you up to an 80-percent ROI.

Planning Your Garage Conversion

The first step in planning a garage conversion is deciding upon the room's new intended purpose. Do you need a place for teens to hang out at home with friends? Are you dreaming of a large, luxury man cave? Maybe you'd just enjoy an upgraded space to park your cars in winter - one that's fully insulated and climate controlled? Before you decide, keep a few factors in mind:
  • Communication between yourself and your contractor is vital. Choose one with whom you have a good rapport. Once your vision is cemented in your own mind, make sure you're able to communicate it fully so both you and your contractor are on the same page.
  • Your budget is important. Set one and stick to it as closely as possible. Overspending on a renovation can actually lose you money on resale if your upgrades aren't comparable to nearby homes.
  • This is your remodel; don't be afraid to add the features you've always wanted, such as a downstairs laundry room, an off-the-charts game room or even an affordable home office that lets you spend more time with your family, less time commuting.
Take time planning your garage conversion to living space. Interview contractors and get multiple estimates. It may be worth your time and money to consult with a local interior designer as well, to help you choose finishes, colors and furniture placement.
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