From £26,080
ADOVA are here to help customers who need an Extension Builder in Chelsea. We offer a competitive rate to complete all your extension buildering jo...
From £26,264
Greater London, SW3
Trusted and professional extension builder in Chelsea. Experienced in all extension buildering work and keeping within budget and on quote. Oro Pro...
From £26,248
Experienced extension builder ready to quote for your work. Clarisford is the best extension builder in Chelsea. No obligation free quotes and many...
From £26,528
Chelsea Greater London, SW3
Clarisford is a property developer and Design & Build firm that specialise in the creation of extraordinary projects from concept all the way to co...
From £26,408
Our building services company Autas Developments have fifteen years' experience of helping customers in Central London and the surrounding areas by...
From £26,264
Chelsea Greater London, SW3
We specialise in mid to high end residential renovations.Offering comprehensive Design and Build packages that Inc all necessary reports, plans and...
From £25,896
Trusted and professional extension builder in Chelsea. Experienced in all extension buildering work and keeping within budget and on quote. Sloane ...
From £26,392
Trusted and professional extension builder in Chelsea. Experienced in all extension buildering work and keeping within budget and on quote. Propert...
From £26,424
Builders by Design Ltd are here to help customers who need an Extension Builder in Chelsea. We offer a competitive rate to complete all your extens...
From £26,336
Greater London, SW3
Need to find an Extension Builder near you for all your extension buildering work?
Hearne House provides a local, trusted extension builder...

A timber frame extension built in Chelsea typically ranges from £25,896 (Sloane Ave Renovations based in SW1X) to £26,528 (Clarisford based in SW3), but this will vary depending on the size of your extension, the design features you'd like and what your soil is like for the foundations.
Comparing extension builders estimates for building a timber frame extension gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build a timber frame extension in Chelsea by posting a job with HaMuch and we'll send it to extension builders in Chelsea.
Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Underpin a building - £17,784

Two storey extension - £88,426

Build a timber frame extension - £26,284

Build a swimming pool - £81,284

Single storey extension - £60,680

Side return extension - £44,695

Install an RSJ - £2,484

Outbuilding - £10,284

Build a Mansard loft conversion - £52,284

Loft conversion - £36,413

Build a kitchen extension - £42,284

Hip to gable loft conversion - £42,284

Granny annexe - £87,284

Garden office - £10,284

Convert a Garage - £16,284

Garage - £18,784

Build a flat roof extension - £22,284

Build a dormer loft conversion - £42,284

Concrete foundations - £6,534

Convert a bungalow loft - £29,284

Convert a basement - £40,695