How Much Does a Detached Garage Cost in 2026? (UK)
A new detached garage in the UK costs roughly £12,000–£22,000 for a single brick-built unit in 2026, and £22,000–£40,000 for a double. A concrete sectional or prefab garage is far cheaper at £5,000–£12,000, while a timber garage sits around £6,000–£15,000. The big cost drivers are the foundations and concrete base, wall material, roof type, drainage and whether you need planning permission. This guide breaks down every line of the price.
Detached Garage Cost by Size & Material (2026)
Supplied and built including foundations, base, walls, roof and a single up-and-over door on level ground.
Rule of thumb in 2026: a brick-built detached garage runs roughly £1,000–£1,500/m² once you include the base, roof and door.
Where the Money Goes
- Foundations & concrete base (£2,000–£5,000). A reinforced slab on a compacted sub-base is the single most important — and most skimped — element.
- Walls (£3,000–£10,000). Brick and block cost the most but last 50+ years; timber and concrete panels are quicker and cheaper.
- Roof (£1,500–£5,000). A pitched tiled roof costs more than a flat felt or EPDM roof but looks better and lasts longer.
- Garage door (£600–£3,000). A basic up-and-over is cheapest; insulated sectional or roller doors with remotes cost more.
- Drainage, power & lighting (£800–£2,500). A consumer unit, sockets and an electrician sign-off (Part P) add up.
- Labour (£180–£280/day per trade). A single brick garage is typically 2–3 weeks for a small crew.
Do You Need Planning Permission?
A detached garage is often allowed under permitted development if it is single-storey, under 4m high (dual-pitched roof) or 3m (other roofs), and does not cover more than half the land around the original house. You will usually need permission if the property is listed, in a conservation area or the garage sits forward of the principal elevation. Building Regulations apply to the base, structure and any electrics regardless of whether planning is needed. Always confirm with your local authority before work starts.
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