Hand-picked and independently researched — the most trusted builders in Greenwich, chosen on Google rankings, review signals and trade accreditations. No business pays for an organic spot.
Are you a builder business in Greenwich? Get a featured spot above the Top 5 and be seen first.
Enquire about featuring →A family-run building firm founded over 30 years ago and based on Blackheath Hill in Greenwich (SE10), covering Blackheath, Charlton, Shooters Hill, Eltham and Plumstead. Home extensions, loft conversions, refurbishments and kitchens with an in-house architect — a genuinely local independent.
A bespoke building firm covering Eltham (SE9), Greenwich (SE10), Lee and Blackheath, specialising in dormer loft conversions and rear and side house extensions. A genuinely local independent handling projects from design to completion.
A loft-conversion specialist established in 2011, covering Greenwich (SE10), Blackheath, Lewisham and Eltham across South East London. An FMB-affiliated and Velux-certified firm offering an insurance-backed 5-year guarantee — a genuinely local independent.
An FMB-registered building company based in Blackheath, covering Greenwich, Charlton and the surrounding South East London area. Handles extensions, loft conversions, refurbishments, roofing, kitchens and bathrooms — a genuinely local independent.
An LABC award-winning design-and-build company with 20+ years extending and converting London's period homes, covering Greenwich, Blackheath, Charlton and Eltham. In-house architects and builders — a genuine independent rather than a lead-gen middleman.
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 Greenwich, 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.
Greenwich 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.
Most builders in Greenwich also cover Greenwich, Woolwich, Eltham, Charlton, Blackheath and Plumstead. 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.