Extension Builder in Richmond
53 vetted extension builders covering Richmond. Post your job free and compare responses directly - no obligation.
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Building and renovation work in Richmond
Richmond, part of the London Borough of Richmond upon Thames, is known for 18th-century townhouses and Regency and Victorian villas around Richmond Hill, overlooking the river landscape below. Its proximity to Richmond Park and Richmond Hill and good transport links via Richmond station, served by National Rail, the District line and the London Overground 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 Richmond Hill conservation area - the borough has 85 in total, one of the highest counts of any London borough covering parts of Richmond, 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 Richmond increasingly look for tradespeople who understand that local context, rather than a generic, one-size-fits-all quote.
What to expect from a extension builder in Richmond
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 Richmond
How to Choose a Builder in Richmond
A practical checklist for picking a trustworthy builder if you live in Richmond.
House Extension Cost in Richmond: 2026 Price Guide
Single and double-storey extension costs in Richmond, and the local factors that move the price.
Loft Conversion Cost in Richmond: 2026 Price Guide
Typical loft conversion prices in Richmond, from a simple rooflight loft to a full dormer.
Kitchen Extension Planning Permission in Richmond
Do you need planning permission for a kitchen extension in Richmond? Permitted development limits and local conservation area rules explained.
Loft Conversion & Dormer Planning Permission in Richmond
Do you need planning permission for a loft conversion or dormer in Richmond? Roof volume limits, party walls and conservation area rules explained.
Hiring safely in Richmond
A few things worth checking before you agree to any quote:
Frequently asked questions
How much does a extension builder cost in Richmond?
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 Richmond 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 Richmond?
It depends on the specific job, but it's a real question to ask locally: the Richmond Hill conservation area - the borough has 85 in total, one of the highest counts of any London borough cover parts of Richmond, 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 Richmond upon Thames's planning department, or ask your builder to confirm before work starts.
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