How much does a garage conversion cost in the UK?
A garage conversion costs £7,500 to £20,000 in the UK, typically around £14,000 for the conversion. Prices reviewed June 2026.
A garage conversion turns space you already have into a room, so it is one of the cheaper ways to add living space. Price depends on the size and on whether you add a bathroom or kitchen.
Price your garage conversion
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Garage conversion cost breakdown
What a garage conversion typically costs, by option:
| Conversion type | Typical UK cost |
|---|---|
| Single garage, basic room | £7,500 to £12,000 |
| Single garage, high spec | £9,000 to £18,000 |
| Double garage | £12,000 to £20,000 |
| + Add an en-suite or plumbing | add £2,500 to £6,000 |
What's included in the price?
A typical garage conversion price includes:
- Insulating and finishing the floor, walls and ceiling
- Replacing the garage door with a wall and window
- Electrics, heating and plastering
- Building control sign-off
What changes the price?
The things that move a garage conversion price most:
Single or double garage, and the floor area
Whether you add an en-suite, kitchenette or utility
Bringing the floor and walls up to habitable standard
Any structural work where the garage joins the house
Does where you live change the cost?
London and the South East add around 15 to 25 percent on labour.
Common questions
Converting a single integral garage into a basic habitable room typically costs £7,500 to £12,000. A higher spec, or adding plumbing, takes it to £15,000 to £18,000.
Most garage conversions are permitted development because the work is internal, but you will need building control sign-off, and some homes have a planning condition that keeps the garage as parking. Check before you start.
It usually does, because it adds usable living space at a relatively low cost, though it can reduce value where buyers in the area expect a garage and off-street parking.
These are independent guide prices based on typical UK jobs in 2026. Your actual cost depends on your property, spec, access and where you live. Always get at least three written quotes before committing.