Extension Builder in Finchley
1193 vetted extension builders covering Finchley. Post your job free and compare responses directly - no obligation.
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Building and renovation work in Finchley
Finchley, part of the London Borough of Barnet, is known for traditional Victorian and Edwardian homes around Finchley Church End, interwar suburban housing, and the entirely residential Finchley Garden Village. Its proximity to Avenue House and its grounds and good transport links via Finchley Central station, and the Northern line 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 Finchley Garden Village and Finchley Church End conservation areas covering parts of Finchley, 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 Finchley increasingly look for tradespeople who understand that local context, rather than a generic, one-size-fits-all quote.
John' S Design
Builder, Plumber, Painter & Decorator, Tiler, Extension Builder, Gas Engineer
NW7 2QH
Get in touchMunroe Painting And Construction
Builder, Painter & Decorator, Extension Builder
NW4 4LH
Get in touchH Century Design And Build
Builder, Painter & Decorator, Extension Builder, Groundworker
N3 1PB
Get in touchPortland Building And Maintenance Group
Builder, Electrician, Extension Builder
NW11 8ED
Get in touchUnion Construction (Uk)
Builder, Electrician, Plumber, Extension Builder, Gas Engineer
NW9 6ES
Get in touchGreen Construction Management
Builder, Electrician, Plumber, Extension Builder, Gas Engineer
N20 0QW
Get in touchGiox Maintenance
Builder, Electrician, Plumber, Extension Builder, Gas Engineer
NW4 4DJ
Get in touchRacim Services
Builder, Plumber, Painter & Decorator, Extension Builder, Gas Engineer
N12 8HY
Get in touchLuxdesignconstruction
Builder, Plasterer, Painter & Decorator, Extension Builder
N11 1JJ
Get in touchWest London Emergency Construction
Builder, Plasterer, Painter & Decorator, Extension Builder
NW7 3DD
Get in touchTrend Design And Renovation
Builder, Electrician, Plumber, Extension Builder, Gas Engineer
NW11 8SA
Get in touchMaster Construction 21
Builder, Plasterer, Painter & Decorator, Extension Builder
N11 3AS
Get in touchAthena R&A Construction
Builder, Electrician, Plumber, Extension Builder, Gas Engineer
N11 1HH
Get in touchMaksim Construction
Builder, Electrician, Plumber, Extension Builder, Gas Engineer
NW2 1EF
Get in touchFix Cool
Builder, Plumber, Painter & Decorator, Extension Builder, Gas Engineer
NW11 9EH
Get in touchLion Rock London Design And Build
Builder, Plasterer, Painter & Decorator, Extension Builder, Groundworker
N3 1PB
Get in touchBuildora Services
Builder, Electrician, Plumber, Extension Builder, Gas Engineer
NW9 5SN
Get in touchUk Renovex
Builder, Plumber, Painter & Decorator, Extension Builder, Gas Engineer
NW4 2HA
Get in touchBespoke Custom Carpentry
Builder, Electrician, Plumber, Extension Builder, Gas Engineer
NW11 6XU
Get in touchSmart Installations Solutions
Builder, Electrician, Plumber, Extension Builder, Gas Engineer
N3 2NT
Get in touchProfessional Refurb, Gas And Heating
Builder, Plumber, Extension Builder, Gas Engineer
EN4 8PH
Get in touchBrusdeco
Builder, Plumber, Plasterer, Painter & Decorator, Extension Builder, Gas Engineer
N12 7HX
Get in touchWhat to expect from a extension builder in Finchley
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 Finchley
How to Choose a Builder in Finchley
A practical checklist for picking a trustworthy builder if you live in Finchley.
Loft Conversion Cost in Finchley: 2026 Price Guide
Typical loft conversion prices in Finchley, from a simple rooflight loft to a full dormer.
House Extension Cost in Finchley: 2026 Price Guide
Single and double-storey extension costs in Finchley, and the local factors that move the price.
Kitchen Extension Planning Permission in Finchley
Do you need planning permission for a kitchen extension in Finchley? Permitted development limits and local conservation area rules explained.
Loft Conversion & Dormer Planning Permission in Finchley
Do you need planning permission for a loft conversion or dormer in Finchley? Roof volume limits, party walls and conservation area rules explained.
Hiring safely in Finchley
A few things worth checking before you agree to any quote:
Frequently asked questions
How much does a extension builder cost in Finchley?
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 Finchley 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 Finchley?
It depends on the specific job, but it's a real question to ask locally: the Finchley Garden Village and Finchley Church End conservation areas cover parts of Finchley, 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 Barnet's planning department, or ask your builder to confirm before work starts.
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