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Enquire about featuring →An owner-managed building firm specialising in loft conversions and house extensions for over 20 years, covering Clapham, Brixton and across South London. Paul and Dangis are regularly on site overseeing each job — a genuinely local independent, not a national chain.
A family-run builder celebrating 25 years of loft conversions and extensions across Clapham, Brixton, Peckham and the surrounding South London streets, working from a base in Balham. In-house architect team and a 10-year guarantee — a genuinely local independent.
A small, locally based builder with over 20 years' experience covering Clapham, Brixton and the wider South London area. Handles kitchen extensions, loft conversions, full renovations and bathrooms with NICEIC and Gas Safe registered tradesmen — a genuinely local independent.
An FMB-accredited building firm covering Clapham (SW4), Brixton and South London, specialising in house extensions, loft conversions and renovations. A genuinely local independent handling projects from design through to completion.
An LABC award-winning design-and-build company with 20+ years extending and converting London's period homes, covering Clapham, Brixton, Peckham and Bermondsey. In-house architects and builders — a genuine independent rather than a lead-gen middleman.
How we chose the top 5 builders in Lambeth, Southwark & Lewisham
Every business on this page earned its place through independent research. We look at where companies rank organically on Google, the volume and quality of their reviews, ratings and verification across platforms like Checkatrade, Which? Trusted Traders and TrustATrader, relevant trade accreditations, and the kind of word-of-mouth and social proof that's hard to fake. No business can pay to appear in this organic Top 5 — the list is earned and reviewed regularly.
If you're comparing builders in Lambeth, Southwark & Lewisham, any of the five above is a sound starting point. We'd still recommend getting more than one quote and confirming current availability and accreditations directly with the business before you book.
Finding a good builder in Lambeth, Southwark & Lewisham
Lambeth, Southwark & Lewisham has a healthy mix of independent tradespeople and small local firms, and as anywhere, quality varies. Every business on this page earned its place through independent research — online reputation, verified reviews, local trading evidence and professional credentials — and none of them paid to appear.
Building work is the biggest investment of any trade here, so look for a builder registered with a recognised body such as the Federation of Master Builders (FMB), fully insured, and able to show recent projects and references. Always get a detailed written quote and a clear schedule.
What do Lambeth, Southwark & Lewisham builders cover?
Most builders in Lambeth, Southwark & Lewisham also cover Brixton, Clapham, Peckham, Bermondsey, Lewisham and Deptford. Coverage varies by business, so it's always worth confirming your postcode when you make an enquiry.
Typical jobs include extensions, renovations, new builds and structural work — and most offer free quotes for larger work.
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