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Garage conversion cost: what it really costs in 2026
The cheapest way to add a room.
£14,000 – £24,000
Converting a single garage starts around £14,000 for a basic habitable room, rising to about £24,000 for a fully finished living space with services.
Price by spec
| Option | What it means | Typical price |
|---|---|---|
| Basic conversion | Insulated, plastered, usable room | £14,000 – £19,000 |
| Habitable spec | Heating, more electrics, better finish | £19,000 – £24,000 |
| Full living space | Kitchenette or en-suite added | £24,000+ |
What actually happens
- Garage door removed; new wall and window built in its place
- Floor raised, insulated and damp-proofed
- Walls and ceiling insulated and boarded
- First-fix electrics and heating extended from the house
- Plastering throughout
- Flooring, second fix and decoration
Popular choices
Home officeSnug or playroomUtility roomGuest room with en-suite
Regulations to know
- Usually permitted development, but building regulations always apply — insulation, ventilation and escape windows are checked
- Some estates have planning conditions requiring parking; check before you start
Tips from the trade
- Damp-proofing the floor properly is the make-or-break detail
- Match the new front wall's brick to the house or render it — mismatched brick hurts kerb appeal
Plan this project properly
Get a region-adjusted estimate, track budget against real quotes, and find local tradespeople -- free to browse on Qome.
Start planning on QomePrices on this page are approximate, region-adjusted guide figures built from cross-checked UK cost data. They exist to inform you, not to bind anyone. Actual prices are whatever you and your tradesperson agree, and a difference between a Qome guide figure and a real quote is not a fault in either.