Your loft, self-built properly.
Local coverage
We know your roofline, not just your postcode.
Every one of 368 London neighbourhoods has its own page: typical roof types, permitted development limits, planning temperament, party wall reality and delivery access.
Browse all London areasHow it works
From “I want more space upstairs” to a build pack — in minutes.
Tell us about your roof
A short 7-step wizard covers your property, roof type and what you want from the loft.
See a realistic estimate
Based on London-specific loft kit pricing and dormer, hip-to-gable, mansard or rooflight projects similar to yours.
Get your build pack and support
Structural drawings, an itemised kit specification and technical support, with an optional trade installer if you'd rather not fit it yourself.
The output
Not a ballpark. A build pack you can act on.
Tell us about your loft and roof type, and we'll put together a printable, build-ready pack — structural kit specification, drawings and a staged plan for building control sign-off.
Build-ready drawings
Structural calculations, building-regs-ready drawings and a party wall pack — the paperwork your building control officer expects to see.
Itemised build pack
Kit components, fixings, insulation, windows and staircase priced line by line — no guesswork on what's in the crate.
Guided installation stages
A staged installation sequence with sign-off checkpoints, whether you're building it yourself or bringing in a trade installer.
London cost guide
Real ranges, not guesswork.
Self-build loft kits typically cost less than a contractor-managed conversion because you're paying for the structural kit, drawings and support rather than full-service labour. Our estimator layers your roof type, size, finish and features on top of borough-level benchmarks.
Get my personalised estimate| Loft type | Typical size | London range |
|---|---|---|
| Rooflight / Velux kit | 20–30 m² | £25k – £40k |
| Dormer kit | 25–35 m² | £40k – £60k |
| Hip-to-gable kit | 30–40 m² | £50k – £75k |
| Mansard kit | 35–50 m² | £65k – £95k+ |
Kit + build pack; excludes fit-out, party wall fees and unusual site constraints.
Recent projects
London lofts we've scoped.
What self-builders say
Built on clarity, not sales pressure.
“The build pack was clear enough that our building control officer signed it off first time.”
“Being able to bring in our own trade installer for the parts we didn't want to do ourselves made the whole thing manageable.”
“Loved how the kit specification was itemised. Felt like it was built for London roofs specifically.”
Ready to see your numbers?
Answer 7 short questions to get your London-specific loft kit estimate and a build pack outline.