Extension Builder in Muswell Hill
773 vetted extension builders covering Muswell Hill. Post your job free and compare responses directly - no obligation.
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Building and renovation work in Muswell Hill
Muswell Hill, part of the London Borough of Haringey, is known for red-brick Edwardian parades along the Broadway and unified Edwardian and late Victorian houses on the residential streets radiating off it. Its proximity to Alexandra Palace and good transport links via Highgate station and bus links, with Alexandra Palace station nearby 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 Muswell Hill conservation area - designated in 1974 and one of the largest in London - plus the Fortis Green and Rookfield Estate conservation areas covering parts of Muswell Hill, 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 Muswell Hill increasingly look for tradespeople who understand that local context, rather than a generic, one-size-fits-all quote.
Oliver Sk Contractors
Builder, Plasterer, Painter & Decorator, Extension Builder
N8 7NG
Get in touchP.w Construction Builders
Builder, Plasterer, Carpenter, Extension Builder, Groundworker
N15 3RQ
Get in touchTreanor Construction
Builder, Electrician, Painter & Decorator, Extension Builder
N22 6ED
Get in touchVolodymyr Korshovskyi Best Services
Builder, Roofer, Painter & Decorator, Extension Builder
N8 0JU
Get in touchRadicat Construction
Builder, Plasterer, Painter & Decorator, Extension Builder
N15 6TA
Get in touchI Plumbing & Heating Services
Builder, Plumber, Extension Builder, Gas Engineer
N22 5RB
Get in touchJussef Enterprise
Builder, Electrician, Plumber, Extension Builder, Gas Engineer
N15 4EG
Get in touchWhat to expect from a extension builder in Muswell Hill
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 Muswell Hill
How to Choose a Builder in Muswell Hill
A practical checklist for picking a trustworthy builder if you live in Muswell Hill.
Kitchen Extension Cost in Muswell Hill: 2026 Price Guide
What a kitchen extension typically costs in Muswell Hill, and what pushes the price up or down.
House Extension Cost in Muswell Hill: 2026 Price Guide
Single and double-storey extension costs in Muswell Hill, and the local factors that move the price.
Kitchen Extension Planning Permission in Muswell Hill
Do you need planning permission for a kitchen extension in Muswell Hill? Permitted development limits and local conservation area rules explained.
Loft Conversion & Dormer Planning Permission in Muswell Hill
Do you need planning permission for a loft conversion or dormer in Muswell Hill? Roof volume limits, party walls and conservation area rules explained.
Hiring safely in Muswell Hill
A few things worth checking before you agree to any quote:
Frequently asked questions
How much does a extension builder cost in Muswell Hill?
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 Muswell Hill 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 Muswell Hill?
It depends on the specific job, but it's a real question to ask locally: the Muswell Hill conservation area - designated in 1974 and one of the largest in London - plus the Fortis Green and Rookfield Estate conservation areas cover parts of Muswell Hill, 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 Haringey's planning department, or ask your builder to confirm before work starts.
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