Is converting a garage a good idea?

Author: Dr. Milan Runolfsson  |  Last update: Monday, March 9, 2026

For the most part, experts agree that converting your garage into living space does not add value to your home. This isn't always the case; it depends on where you live. And if you're planning to sell your home within three to five years, a garage conversion is usually not a good idea.

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.

Will my house lose value if I convert the garage?

This leads to using the original square footage when trying to value the home with recent sales. With all of this factored in: In most cases garage conversions decrease the value of a home. At best, the conversion equally cancels out the loss of the garage.

Is a garage conversion worth it?

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 planning permission to change a garage into a room?

Planning permission is not usually required to convert your garage into additional living space for your home, providing the work is internal and does not involve enlarging the building.

Why Planners Refuse Garage Conversions in the UK

How much does a 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.

Can I legally convert my 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.

How can you tell if your garage is suitable for conversion?

Make sure it's structurally safe

An architect or surveyor will be able to advise you whether your garage is suitable to convert, particularly the soundness of the walls, roof and foundations. Some are too poorly built or decrepit in which case it might be cheaper to knock down and replace.

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.

Is it hard to convert a garage into living space?

Converting a garage to a living space is a big job that includes raising the floor, insulating the walls and adding heating, cooling and ventilation — as well as updating doors and windows. Before you begin a DIY garage conversion, think about every aspect of the job.

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.

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.

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.

How long should a 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.

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

Is it cheaper to convert a garage or build an extension? Garage conversions are almost always cheaper because all of the work happens internally. With an extension, you have to demolish walls and create a brand-new building from the ground up.

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.

Does a garage conversion need a window?

If your new room doesn't open onto a hallway providing a direct protected route to an external door, or have its own door leading to the outside you'll need to provide an escape window.

Do I need permission to change garage door?

Appearance: Installing a new garage door may require planning permission if the appearance of the door is vastly different to the one used in the original construction of the house. This is because unsightly aesthetics can affect the whole neighbourhood and potentially reduce the value of surrounding houses.

How much does it cost to add windows to an existing garage door?

On average, you can expect to tack between $300 and $500 on to the price of the door, depending on the style of window you choose. The more detailed your window design, the more the project is likely to cost. It's up to you how simple or extravagant you want to go.

Do I need permission to convert my garage?

Planning permission for a garage conversion is not necessary in many cases, although it is always best to double check with your local authority first. Most integral garage conversions fall under Permitted Development which means there is no need to make a planning application.

What is the best flooring for a garage conversion?

As general advice, if you're planning on using the converted garage solely to work in, ceramic tiles are a good way to go. They're easy to maintain, durable, and are great for underfloor heating. Flooring for garage conversions that require a dual purpose, we'd suggest either floor tiles or vinyl flooring.

Is it legal to convert a garage into a room?

Living in a garage in California is only legal if the garage has been converted to a habitable space through the proper channels. ... Renovating the garage without the proper permits may not count as a legal residence either.

Do I need a permit to turn my garage into a room?

Because a renovation can disrupt electricity, power, or water lines. The Los Angeles building code for garage conversions matters a lot in obtaining a permit. That's why you need to obtain a building permit from the local Department of Building and Safety office and speak with the code official stationed there.

Do you need planning permission to put a toilet and shower in a garage?

If you're converting a non-residential space, like a loft or garage, into a bathroom, planning permission might be required. This is because you're changing the use of the space, which could impact the overall property.

Is it a good idea to convert a garage into a room?

Converting your garage is one of the most cost-effective ways to add extra space without building a new extension as in many cases, you won't need to dig new foundations. Plus, you don't need to sacrifice any of your garden.

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