7 REAL COSTS
Garage conversion
Turning a garage into a room is one of the cheaper ways to add space, but the real bills still vary a lot by how much structural and insulation work is needed.
Every price we track (hover a dot)
| Year | Region | Source | What it was | Paid | Src |
|---|---|---|---|---|---|
| 2022 | UK unspecified | Real bills paid | garage conversion (basic), plus separate new roofbasic conversion; new roof paid separately (extra); year approximate (thread date) | £3,000 | source |
| 2022 | UK unspecified | Real bills paid | small single garage conversion into a roomsmall garage; doors removed, small wall, window, rendering, doorway, plastering, flooring; year approximate (thread date) | £6,000 | source |
| 2022 | UK unspecified | Real bills paid | internal single garage conversion (large single garage)large single internal garage conversion; year approximate (thread date) | £9,000 | source |
| 2022 | UK unspecified | Real bills paid | large internal garage conversion (bigger than single, not quite double)large internal garage, bigger than single but not quite double; year approximate (thread date) | £10,000 | source |
| 2025 | UK unspecified | Real bills paid | Garage to living room, opened to kitchengarage converted to living room opened up to kitchen; flooring included | £10,000 | source |
| 2025 | South Wales | Real bills paid | Double garage conversion to living spacedouble garage to extra living space; excludes flooring/decorating | £15,000 | source |
| 2025 | South East | Real bills paid | Single garage to bedroom/studysingle garage converted to bedroom/study, finished to a very good standard | £17,000 | source |
Common questions
How much does garage conversion cost in the UK?
Across 7 real prices people actually paid, the median is £10,000, ranging from £3,000 to £17,000. These are real prices homeowners posted, not cost-guide estimates.
Why do garage conversion prices vary so much?
Size, spec, region and the individual trade all move the figure, and cost guides rarely say which. Seeing what real people paid, with the details they shared, gives you a far better benchmark than a single average.
Are these garage conversion prices quotes or actual bills?
Actual bills. We deliberately exclude quotes and estimates and only publish amounts people said they paid, each linked to the original post.
Related free guides
- Garage conversion cost UK: turning a garage into a usable room →
- What drives the cost of a garage conversion →
- How to get honest quotes for a garage conversion →
- Loft conversion cost UK: room-in-roof, dormer and hip-to-gable prices →
- Dormer loft conversion cost UK: why it costs more and what to expect →
- Single storey extension cost UK: the per square metre reality →
Methodology: every price here is a real amount a UK homeowner said they paid, taken from a public forum post and linked to its source. We exclude quotes and estimates: paid, not quoted. We never invent figures and no sponsor can touch a number. Spot an error? Tell us and we'll fix or remove it fast.