PRICE GUIDE · TRADES & CONSTRUCTION · 2026–2027
Garage Conversion cost in the UK
£10,000–£30,000 per project. Typically £18,000.
£10,000 to £30,000 covers most UK garage conversions, with £18,000 typical for a single garage made into a habitable room. A double or detached garage, adding a bathroom or kitchenette, and how much insulation, damp proofing and new walling the shell needs move the cost.
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HOW MUCH IT COSTS
How much does garage conversion cost in the UK?
| Low end | £10,000 | a basic single garage converted to one room |
|---|---|---|
| Typical | £18,000 | what most people pay |
| High end | £30,000 | a double garage with a bathroom, in the South East |
Locufy guide prices for 2026–2027. Updated 2026. A national range, not a quote — enter your town above for real prices from the builders and trades near you.
What moves the price
- Single, double or detached — a double garage conversion has twice the floor, walls and roof to bring up to standard
- What the room is for — a bathroom or kitchenette adds plumbing, drainage and extractor fans
- Insulation and damp proofing — garage walls, floor and roof need bringing up to Building Regulations for a habitable room
- Infilling the door — brickwork and a window in place of the garage door is a large share of the build
- Heating and electrics — extending the heating and new circuits need a heating engineer and a Part P electrician
- Region — garage conversion builders in London and the South East charge more than in the North
Building and repair prices in the UK are up 6% over five years (ONS Consumer Price Inflation, Services for maintenance and repair, to 2026 August). Five years ago a typical garage conversion would have cost about £17040 — an estimate from today's guide price and that index, not a recorded price. Source: ONS MM23 D7DO →
WHAT YOU GET
What a garage conversion booking includes
Takes: Two to eight weeks on site, depending on size and whether plumbing is added. Not included: Kitchen or bathroom fittings, furniture, and decoration beyond the basic finish are usually priced separately — see the related guides below.
WHAT PEOPLE BOOK
Common garage conversion jobs
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Garage Conversion near you, with prices shown
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How to pay less
- Reuse the old garage door opening for the new window and wall, rather than cutting new openings in the garage conversion
- Keep the garage conversion simple, without a bathroom, unless you really need one
- Check permitted development early so you avoid paying for a planning application you do not need
Before you book
- A garage conversion always needs building regulations approval, even when planning permission is not required
- Check whether permitted development rights have been removed on your estate, which is common on newer homes
- Ask your insurer and mortgage lender about the garage conversion before work starts
- Think about parking — losing the garage can matter on streets with permit parking or few spaces
Garage Conversion cost: questions people ask
£10,000–£30,000 per project, about £18,000 typical. A basic single garage conversion sits at the bottom and a double garage with a bathroom at the top; enter your postcode above to find builders who take on conversions near you.
Two to eight weeks on site for most homes. A simple single garage can be done in a few weeks; a double with plumbing takes longer.
Often not, because most internal conversions are permitted development. But some estates have those rights removed, and listed buildings or changes to the front of the house may need permission. Building regulations approval is always needed.
It usually adds useful living space, which buyers value, though in areas where parking is hard a garage can matter to buyers too.
Kitchen or bathroom fittings, furniture and decoration beyond the basic finish are generally extra.
They are Locufy guide prices for the UK, based on published UK garage conversion cost guides — a national range, not a quote. Size and what the room is for decide your price.