The Complete Mansard Loft Conversion Guide
Mansard loft conversion guide — 72° rear wall design, costs from £55,000, why planning permission is nearly always needed and how mansards perform in conservation areas.
Key Points
- Costs typically £55,000–£85,000
- Delivers the largest usable floor area of any conversion type
- Full planning permission required in almost all cases
- Build programme of 12–16 weeks