Project Type
Dormer Loft Conversion
Duration
14 weeks
Project Value
£78,000
The Challenge
St John's Wood Conservation Area falls within Westminster, which has a particularly design-conscious approach to dormer conversions. The property was an end-of-terrace villa where the side elevation was also visible from the street, meaning both the rear dormer and any rooflights had to be carefully positioned to satisfy Westminster's conservation officers. An adjoining property had recently had a dormer refused.
Our Solution
Our architect reviewed the refused neighbour application to understand Westminster's specific concerns and designed accordingly: a rear dormer set in from both side returns, clad in lead, with a parapet-style front face to reduce the visual mass when viewed from the street. Rooflights were positioned on the rear slope only. Westminster approved in 9 weeks.
Results
- ✓Westminster planning approval in 9 weeks — first submission accepted
- ✓Lead-clad dormer with parapet face — conservation officer praise noted
- ✓32m² of loft space created
- ✓Master bedroom with bespoke fitted walk-in wardrobe
- ✓En-suite bathroom with underfloor heating and rain-head shower
- ✓Estimated property value increase: £145,000
- ✓Building Regulations completion certificate issued on schedule
Key Features
- ✓Westminster conservation area planning consent
- ✓Lead-clad rear dormer with recessed parapet face
- ✓Walk-in wardrobe — bespoke fitted joinery
- ✓En-suite with Duravit sanitaryware and underfloor heating
- ✓Velux Conservation rooflights to rear pitch only
- ✓Acoustic insulation package for party wall
Specification
| Item | Specification |
|---|---|
| Dormer cladding | Code 4 lead, traditional bossed method to cheeks; lead roll to parapet coping |
| Rooflights | Velux Conservation triple-glazed, two units to rear pitch only |
| En-suite | Duravit D-Neo wall-hung WC and basin, Hansgrohe Raindance shower, Porcelanosa tile |
| UFH | Warmup Foil underfloor heating mat under porcelain throughout en-suite |
| Wardrobe joinery | Bespoke painted Shaker-fronted wardrobe, full-height, soft-close throughout |
| Acoustic treatment | Rockwool RWA45 between party wall joists, Gypframe resilient bar to ceiling |
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