Compare NW London Builders
Find and compare builders who specialize in heritage properties and conservation areas. All builders are vetted and reviewed by local homeowners.
Featured Builders
Heritage Craft Builders
📍 Hampstead
47 reviews
North London Extensions Ltd
📍 Crouch End
82 reviews
Edwardian Restoration Co
📍 Muswell Hill
34 reviews
Modern Living Builds
📍 Highgate
61 reviews
Camden Heritage Builders
📍 Belsize Park
29 reviews
Swift Extensions
📍 Finchley
95 reviews
NW London Cost Guide 2024
Real costs from completed projects in Hampstead, Highgate, Muswell Hill and surrounding areas. Conservation areas typically add 15-40% to costs.
| Project Type | Budget | Mid-Range | Premium | Conservation Premium |
|---|---|---|---|---|
| Single Storey Rear Extension (4m) | £40,000 | £55,000 | £75,000 | +15-25% |
| Side Return Extension | £35,000 | £45,000 | £60,000 | +10-20% |
| Wrap-Around Extension | £70,000 | £95,000 | £130,000 | +20-30% |
| Loft Conversion (Dormer) | £55,000 | £70,000 | £90,000 | +15-25% |
| Basement Extension | £200,000 | £350,000 | £500,000 | +25-40% |
| Double Storey Extension | £80,000 | £110,000 | £150,000 | +20-30% |
* Costs include build only. Exclude architect fees (8-12%), planning fees, and structural engineer.
Why Heritage Experience Matters
Conservation Compliance
Heritage-experienced builders understand lime mortars, traditional construction methods, and material specifications required by conservation officers.
Planning Navigation
Experienced builders know how to work within planning conditions, handle discharge of conditions, and avoid enforcement issues.
Fewer Surprises
Local experience means they know common issues with Victorian, Georgian and Edwardian properties—from party wall complications to underground springs.
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