EXPERT ADVICE
Do you need planning permission for a garage?
Updated 12/25
By: Content Team
Planning to construct a new garage or convert an existing one, but not sure what the rules are for building a garage in the UK?
This guide breaks down the 'need to knows' of garage planning permission. So you can maximise your garage's potential without running into any planning permission issues.
1. Do you need planning permission to build a garage?
Garages are usually considered outbuildings. Therefore, you don't need planning permission to build a garage, as long as it meets the following strict criteria:
Has a floor space of below 15m² if freestanding or 30m² if attached to your home
Isn’t higher than four metres for pitched roofs
Isn’t higher than three metres for flat roofs
Takes up less than half of your land or garden
Isn't forward of the house's front
Is only one storey high
Isn’t used as a main living space
If your garage falls outside any of these regulations, you’ll likely need to apply for planning permission before building commences.
Is your garage project outside of permitted development rights? Our planning permission hub has all the essential information you need. From planning permission costs to appeals guidance, we've got you covered.
2. Do you need planning permission to convert a garage?
The good news is that in many cases, garage conversions fall under permitted development. That said, it depends on the scale of the work. Here’s what to consider:
Internal-only changes usually don’t need permission
Extensions increasing the footprint or height of the garage often require planning approval
Significant changes to doors, windows or the roof could also require consent
If in doubt, it’s best to contact your local planning authority.
A garage conversion specialist covering your local area will also know the ins and outs of it all.
Before starting your garage conversion, make sure there are no covenants attached to the garage in your property deeds – such as that it has to remain as parking. These are sometimes set by the original house developer.
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3. Do I need planning permission to extend my garage?
Here's where things become a little more complex. If you’re converting an existing garage, there are more regulations in place.
Jump back to our earlier question 1. ‘Do you need planning permission to build a garage’ section for further guidance.
Another brilliant source of information is the HomeOwners Alliance planning permission guide.
4. Do I need planning permission for a garage in my garden?
Along with sheds and greenhouses, garages are considered outbuildings and fall under permitted development.
This means you won’t need planning permission to build one in your garden, as long as it doesn't:
Take up more than half of your land
Isn’t higher than four metres
5. Do I need planning permission for a wooden garage?
Most wooden garages fall under permitted development as they are classed as outbuildings. But it depends on how they’re built and positioned. Key points to know:
Usually no planning permission required (the same goes for kit-built or ready-made garages)
Must still meet size and height limits (i.e, under four metres high and not covering more than 50 per cent of your garden)
Benefits of garage conversions and new garages
Increase your property value – A well-designed garage or conversion is a bonus for many homebuyers
Create extra living space – Ideal for a home office, gym, hobby room, guest space or granny annexe
Keep part-garage functionality – Convert only a section and retain dedicated storage or parking
Cost-effective improvement – Garage conversions are typically more affordable than an extension
No extra council tax
Don't have a garage already, and considering constructing one from scratch? Check out our garage building cost guide for a rundown on what's involved.
How much does a garage cost to be built or converted by a professional?
When it comes to working out the cost of your garage project, the below guides and prices are a good place to start:
Cost to build a garage: The average cost to build a garage starts from £21,000 for a flat roof, single garage
Garage extension cost: The average cost of a single storey garage extension varies from £2,000 - £20,000
Garage conversion cost: The average cost of a garage conversion is £10,000–£20,000
For more on prices, give our job estimator calculator below a whirl or contact a tradesperson directly for an exact quote.
Job Estimate Calculator
Which tradespeople do I need to hire for the job?
The best tradespeople to convert or build your garage is a builder or a garage conversion specialist covering your local area. They’ll have the knowledge and skills to complete your project to the highest standards.
Depending on how much work is going on with your garage conversion or build, you will more than likely need to work with electricians and plumbers too.
On Checkatrade, you'll only find trades who meet our high standards and pass up to 12 checks.
Why use Checkatrade to find a tradesperson near you?
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Request a quote, search in the Checkatrade app, or enter your postcode to find checked and reviewed tradespeople to help get your garage conversion or build off the ground.
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