Project Type
Dormer Loft Conversion
Duration
12 weeks
Project Value
£62,000
The Challenge
The Edwardian semi sat within the Hampstead Conservation Area but not within the Article 4 Direction zone, meaning a rear dormer could in principle proceed under Permitted Development — however, the size required exceeded standard PD limits, and the street's Character Appraisal identified the roofline as a defining feature. Camden's planning officers required a full application with design justification.
Our Solution
Our architect produced a Heritage Impact Assessment demonstrating that a rear dormer set well within the roofline, zinc-clad and with a shallow-pitched roof, would have no adverse impact on the character of the conservation area. The assessment referenced comparable approved dormers in the area. Planning was approved at officer level in 6 weeks.
Results
- ✓Camden planning approval at officer level in 6 weeks
- ✓Heritage Impact Assessment accepted first time
- ✓28m² of new loft space created
- ✓Double bedroom with Velux rooflights and garden views
- ✓En-suite shower room with Porcelanosa tiles and thermostatic shower
- ✓New staircase with oak treads and painted balustrade
- ✓Building Regulations completion certificate issued
Key Features
- ✓Camden conservation area planning consent
- ✓Rear dormer — zinc cladding, shallow pitch
- ✓Velux Conservation rooflights to rear slope
- ✓En-suite with Porcelanosa tiling and thermostatic shower
- ✓Bespoke oak and painted staircase
- ✓Full insulation upgrade to Part L standards
Specification
| Item | Specification |
|---|---|
| Dormer cladding | RHEINZINK standing-seam zinc, pre-weathered, to dormer cheeks and roof |
| Rooflights | Velux Conservation GGL triple-glazed, centre-pivot, aluminium-capped |
| En-suite tiles | Porcelanosa Marmol Calacatta large-format, 600×900mm, with electric UFH mat |
| Shower | Hansgrohe Croma Select thermostatic shower system, brushed nickel |
| Staircase | Engineered oak treads on softwood carriage, painted MDF balustrade |
| Insulation | Rockwool between rafters with Celotex PIR board, achieving U-value 0.18 |
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