18 REAL COSTS
Loft conversion
One of the biggest home projects there is, and the price swings enormously between a simple room-in-roof and a full dormer with an ensuite. Real prices below.
Every price we track (hover a dot)
| Year | Region | Source | What it was | Paid | Src |
|---|---|---|---|---|---|
| 2022 | UK unspecified | Real bills paid | non-habitable loft conversion with 2 velux windowsnon-habitable loft room, 2 velux windows; year approximate (thread date) | £15,000 | source |
| 2023 | UK unspecified | Real bills paid | Non-habitable loft (boarding, no heating, ladder access, no building regs)paid; not a full habitable conversion | £15,000 | source |
| 2022 | UK unspecified | Real bills paid | room-only loft conversion (no dormer), everything but carpetssingle room conversion, no dormer, excludes carpets; year approximate (thread date) | £38,000 | source |
| 2023 | UK unspecified | Real bills paid | Loft conversion, room only (no dormer), everything but carpetspaid; room-only, no dormer | £38,000 | source |
| 2022 | UK unspecified | Real bills paid | hip to gable plus dormer loft conversion, en-suite + 2 velux + staircasehip to gable + dormer, en-suite, 2 veluxes, staircase; year approximate (thread date) | £50,000 | source |
| 2021 | Oxford area | Real bills paid | full dormer loft conversion, main room with en-suite + smaller roomfull dormer, main room with en-suite + smaller room; inc VAT; poster said ~2 years prior (~2021) | £50,000 | source |
| 2021 | UK unspecified | Real bills paid | Hip-to-gable + rear dormer loft conversion, incl staircase, 2 Velux, insulation, electrics, ensuitepaid; ~2021 | £50,000 | source |
| 2021 | Oxford area | Real bills paid | Full rear dormer loft, 2 rooms + Velux + ensuitepaid, inc VAT, near Oxford; ~2021 | £50,000 | source |
| 2021 | London | Real bills paid | dormer loft conversion, bedroom with en-suite, all inclusivedormer bedroom + ensuite, all inclusive; poster dated ~2021 | £52,000 | source |
| 2022 | East London | Real bills paid | loft conversion, 1 bedroom with en-suite1 bed with en-suite; year approximate (thread date) | £65,000 | source |
| 2025 | London | Real bills paid | Loft conversion in 1930s semi (no bathroom)1930s semi; price is plus VAT; no bathroom included | £65,000 | source |
| 2022 | NW England | Real bills paid | hip to gable dormer loft conversion, ceiling drop + Juliet balconyhip to gable, dormer, ceiling drop, Juliet balcony; year approximate (thread date) | £68,000 | source |
| 2024 | UK unspecified | Real bills paid | large loft conversion, 2 bedrooms + bathroomlarge conversion, 2 beds + bathroom | £70,000 | source |
| 2022 | West London | Real bills paid | hip to gable plus dormer loft conversion, shell onlyhip to gable + dormer, shell only; £70k PLUS VAT; year approximate (thread date) | £70,000 | source |
| 2024 | SW London | Real bills paid | full-width dormer loft conversion, 2 double bedrooms + bathroom, ~500 sqftfull-width dormer, 2 double bedrooms + bathroom, ~500 sqft; poster noted own labour discount included | £75,000 | source |
| 2024 | Midlands | Real bills paid | L-shaped dormer loft conversion on 2-bed terraceL-shaped dormer, 2-bed terrace; excludes bathroom fit-out per poster | £75,000 | source |
| 2022 | SW London | Real bills paid | dormer loft conversion, bedroom + en-suite, ceiling lowering + carpetsdormer bedroom + ensuite, ceiling lowering, carpets; 'all in'; year approximate (thread date) | £75,000 | source |
| 2024 | NW England | Real bills paid | dormer loft conversion, 1 bed + bathroom incl scaffolding1 bed/bathroom, includes ~£10k scaffolding | £80,000 | source |
Common questions
How much does loft conversion cost in the UK?
Across 18 real prices people actually paid, the median is £58,500, ranging from £15,000 to £80,000. These are real prices homeowners posted, not cost-guide estimates.
Why do loft 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 loft 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
- 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 →
- Is a loft conversion worth it? Cost, added value and the sums that matter →
- Single storey extension cost UK: the per square metre reality →
- Two storey extension cost UK: what a double extension really costs →
- Garage conversion cost UK: turning a garage into a usable room →
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.