Extension Builder in Lewisham
397 vetted extension builders covering Lewisham. Post your job free and compare responses directly - no obligation.
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Building and renovation work in Lewisham
Lewisham, part of the London Borough of Lewisham, is known for Edwardian civic buildings around St Mary's church, with the established Victorian and Edwardian terraces of Forest Hill, Sydenham and Hither Green nearby. Its proximity to the Horniman Museum and Gardens and good transport links via Lewisham station, served by the DLR and National Rail continue to make it a popular place for homeowners to invest in renovation and extension projects rather than move - keeping steady demand for reliable, quality extension building work in the area.
With the St Mary's and Sydenham Hill and Kirkdale conservation areas covering parts of Lewisham, planning and conservation requirements are a real factor in extension building work here - work that would be straightforward elsewhere can need extra care, matching materials, or formal planning consent locally. Homeowners in Lewisham increasingly look for tradespeople who understand that local context, rather than a generic, one-size-fits-all quote.
Tc Building & Electrics
Builder, Electrician, Plumber, Extension Builder, Gas Engineer
SE14 5LZ
Get in touchC&S Painting And Reforms
Builder, Roofer, Plasterer, Painter & Decorator, Extension Builder
SE6 4JJ
Get in touchAlan Elite Decorators
Builder, Plasterer, Painter & Decorator, Extension Builder
SE26 4EJ
Get in touchAib Contractors
Builder, Roofer, Plasterer, Painter & Decorator, Extension Builder
SE4 2AG
Get in touchPw Construction And Renovation
Builder, Plasterer, Painter & Decorator, Extension Builder
SE6 1DF
Get in touchDulwich Builders
Builder, Electrician, Plumber, Extension Builder, Gas Engineer
SE13 7XD
Get in touchWhat to expect from a extension builder in Lewisham
Extensions typically need either planning permission or a Lawful Development Certificate confirming permitted development rights, plus building control approval throughout.
As with any trade, it's worth asking to see proof of insurance and relevant qualifications before work starts, checking recent examples of similar jobs, and getting the scope of work agreed in writing - see our guide on questions to ask before hiring below.
Typical project costs in Lewisham
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Hiring safely in Lewisham
A few things worth checking before you agree to any quote:
Frequently asked questions
How much does a extension builder cost in Lewisham?
A single-storey extension typically costs from around £1,800 per m² for a standard finish, before architect fees, planning application fees, and building control sign-off - which usually add another £3,000-£8,000. Get a ballpark for your own project with our free extension cost calculator.
How do I know a extension builder in Lewisham is trustworthy?
Every builder on builderfinder.uk is manually checked before their profile goes live - we match their photo ID to their face, verify their UK proof of address, and check their trades and insurance. You can also see their reviews and completed jobs on their profile, and look for the Verified badge, or a Companies House Verified badge if they're a limited company.
Do I need planning permission for extension building work in Lewisham?
It depends on the specific job, but it's a real question to ask locally: the St Mary's and Sydenham Hill and Kirkdale conservation areas cover parts of Lewisham, and work that would be permitted development elsewhere can need formal planning consent here, or need to match existing materials and style. Always check with the London Borough of Lewisham's planning department, or ask your builder to confirm before work starts.
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