How much value does a single garage conversion add?

Author: Mr. Morris Gottlieb Sr.  |  Last update: Thursday, February 5, 2026

For potential buyers, this can really increase the appeal of the property. Generally, a well-designed garage conversion can increase your property value by 10%-20%.

Is it worth converting a single garage?

As well as providing the family with extra living space, converting the garage was a great way of boosting the value of the property. In fact, it's thought that a garage conversion can increase the value of a home by as much as 20%.

Does a garage conversion add value?

Does Converting a Garage Add Value to Your Home? As long as you complete your garage conversion properly, it will add value to your home. The value itself depends on how seamless the conversion is and the type of room you build. Typically, you can expect to recoup about 80% of the project cost.

How much value does a single garage add?

A garage can increase the value of your property by between 5% and 10%, according to recent research. However, this only holds true for single garages; a double garage might increase the value by up to 20%!

What is the ROI on garage conversions?

Does a Garage Conversion Add Value to a House? Yes, a garage conversion typically adds value to your home since you're increasing the amount of liveable square footage. Generally, you have an ROI of about 80% with garage conversions. So if your project costs $10,000, around $8,000 is added to the value of your home.

How Much Does a Garage Conversion Cost?

Will my house lose value if I convert the garage?

The value an ADU adds to a property can be substantial and varies based on several factors including its purpose, size, type, and geographical location. In markets like California, an ADU can instantly boost a home's value by $200,000 to $500,000, with projections for further appreciation over time.

How much does a simple garage conversion cost?

On average, a garage conversion costs between £18,000 and £28,300. Keep in mind that cost of labour is higher in London and the Southeast, sometimes by up to 20% on average. A garage conversion could add a lot of value to your home.

Is a garage conversion cheaper than an extension?

Garage conversions are generally less expensive than home extensions but may not be feasible if significant structural work is needed.

How much does a garage increase property value?

According to various real estate research, homes with garages generally command higher prices than similar homes without them. A garage can add between 5% to 20% to a home's value, depending on factors such as location, design and the existing housing market.

Should I convert a garage to living space?

Whether or not converting your garage is a good idea can depend on whether you're planning to stay in your home or want to sell soon. If you have no plans to move anytime in the near future, converting your garage into a more livable space can certainly add a great deal of personal enjoyment to your home.

Is it legal to convert a garage into a room?

Since California has passed the new ADU laws this year, usable rooms like garage conversions can be used as a source of passive income. Even if you're only planning on converting the garage to an additional bedroom or home office, permits will be needed for residential construction.

What are the rules for converting a garage?

Garage conversion building regulations apply to:
  1. Fire safety: escape routes and fireproofing must be put in place.
  2. Ventilation: moisture proofing and good ventilation is essential.
  3. Thermal performance: floor, wall and loft insulation is required.
  4. Acoustics: soundproofing will be necessary.

Do you have to raise the floor in a garage conversion?

It depends on your intentions. If you plan on permitting this as habitable and condition, then yes, the floor height has to be raised and match the finished floor height of the house. But, if your just going to make this a recreational room you do not have to raise the floor.

How long does a single garage conversion take?

On average, a garage conversion takes as little as 4-6 weeks. Compare this to a loft conversion (8-10 weeks) or rear extension (10-14 weeks) and you can appreciate why homeowners love how quickly this project can be turned around.

What is the U value for garage conversion?

Existing walls need to achieve a U-value of 0.3, existing roofs a U-value of 0.16 and the existing floors should achieve a u-value of at least 0.25. Any new walls or floors require a U-value of 0.18 and new roofs a U-value of 0.15.

Do you need consent to convert a garage?

Building Consent

If you want to convert your garage to a bedroom, living room or media room, it will need to be re-classified from a non-habitable space to a habitable space. This requires a building consent.

How much value can a garage conversion add?

On average, converting a garage into living space can add between 10 to 20 percent to the value of a property. The exact figure depends on factors like the size of the garage, the quality of the conversion, the local property market, and the type of room created such as a bedroom, home office, or recreational area.

What is worth more a bedroom or a garage?

If you're looking to maximize your home's value, consider converting your garage into a livable space. Adding a bedroom, home office, or even a rental unit can significantly boost your home's market value. While this is a more substantial investment, the payoff can be substantial.

Does a garage count as square footage?

Does the garage count in the square footage of a house? The garage does not count towards the square footage of a house, as that is considered an unfinished space. A garage will only count towards the square footage of a home is if it has been legally converted into a living space.

What is the downside of a garage conversion?

Con: Loss of Storage Space

Many homeowners use their garage for additional storage, so before you make the decision to alter the space, make sure you have a plan for your storage needs. Better yet, downsize your possessions for a little more breathing room throughout your home.

Can I convert a single skin garage into a room?

They are essentially single skin blockwork structures. This means you'll need to make them completely habitable by adding insulation, damp proofing, electrical wiring before even thinking about immediate decorations and features.

Is it worth converting a garage?

Generally, a well-designed garage conversion can increase your property value by 10%-20%. If you add a bedroom with an ensuite, this will typically see the property value increase the most.

Do you need permission to convert a garage?

In most circumstances, you will be able to convert your garage without getting planning permission from your local planning authority. However, there are some instances where planning permission will be required, and so we have put together this short guide to help you.

What is the cheapest way to convert a garage to a living space?

Typically, the cheapest type of garage conversion will just involve blocking up the garage doors and finishing out the walls, floors, and ceiling with insulation, drywall, carpet, or other flooring material.

Can I remove my garage door and replace with a window?

Can a garage door be replaced with a window? Yes, a garage door can be replaced with a window.

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