Builders in London
Experienced builders for extensions, loft conversions, renovations, and new builds across London. Project-managed from start to finish with transparent pricing.
About Builder Services in London
Finding a reliable builder in London can feel daunting — but it doesn't have to be. Our verified London builders handle projects from small kitchen knock-throughs to full house renovations and new-build extensions. Each is vetted, insured, and reviewed by previous clients. Whether you're extending a Victorian terrace in Hackney or converting a basement in Chelsea, you'll find the right builder here.
Popular Builder Services in London
House Extensions
Single and double-storey rear, side, and wrap-around extensions. Full project management from foundations to finishing.
Loft Conversions
Dormer, hip-to-gable, mansard, and Velux loft conversions. Includes structural work, insulation, and finishing.
Basement Conversions
Full basement dig-outs and conversions. Waterproofing, underpinning, and fit-out.
Full House Renovations
Gut renovations, structural alterations, and complete refurbishments. Coordinating all trades.
Kitchen & Bathroom Fitting
Knock-throughs, new layouts, plumbing, electrics, tiling, and installation of units.
Builder Price Guide — London 2026
| Service | Typical Price | Notes |
|---|---|---|
| Single-storey extension (per sqm) | £1,500–£2,500 | |
| Loft conversion (dormer) | £40,000–£55,000 | |
| Basement conversion (per sqm) | £2,000–£4,000 | |
| Kitchen knock-through | £3,000–£6,000 | Structural only |
| Full renovation (per sqm) | £1,000–£2,500 |
Local Insight
London building costs are the highest in the UK — expect to pay 30–50% more than national averages. A typical rear extension costs £40,000–£70,000 all-in. Loft conversions are London's most popular home improvement because they add significant value without losing garden space. Always get a detailed written quote (not estimate), check references, and agree a payment schedule tied to milestones — never pay more than 10–15% upfront.
Areas We Cover
- Central London (Westminster, City of London, Soho)
- North London (Islington, Camden, Hampstead, Finchley)
- South London (Brixton, Clapham, Dulwich, Greenwich)
- East London (Shoreditch, Hackney, Stratford, Canary Wharf)
- West London (Chelsea, Fulham, Ealing, Chiswick)
- South East (Lewisham, Bromley, Croydon)
- South West (Wandsworth, Richmond, Kingston)
Other Services in London
Explore other professional services available in London
Builder in London — FAQs
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