From £88,528
Chessington, KT9
Need an Extension Builder in KT9? FLUID CONSTRUCTION has been helping local clients (10 mile radius) with their extension buildering jobs for many ...
From £87,688
West Ewell flooring: covering all aspects of flooring supply and fitting service. please contact us for inquiries
From £88,060
Greater London, KT9
Need to find an Extension Builder near you for all your extension buildering work?
RMC Design & Build Ltd. provides a local, trusted extens...
From £88,408
Need to find an Extension Builder near you for all your extension buildering work?
OAK HOUSE BESPOKE BUILDERS provides a local, trusted ext...
From £88,612
Surrey, KT9
mardon is an established and experienced local extension builder in KT9. Please contact us for a free, no obligation quote and competitive rates. C...
From £88,000
All of our work is guaranteed and covered by public liability and third party insurance for £5 million, giving our customers absolute peace of min...
From £88,528
We are a London based Design & Build construction company offering the following :Property Extensions and Major RenovationsBespoke Kitchens - Desig...
From £88,144
Experienced extension builder ready to quote for your work. Martini Building Contractors is the best extension builder in KT9. No obligation free q...
From £88,588
solaes construction is an established extension buildering business in KT9. We come highly recommended and provide competitive quotes for your work...
From £88,204
Trusted and professional extension builder in KT9. Experienced in all extension buildering work and keeping within budget and on quote. Active Fox ...

Costs range from £87,688 (West Ewell flooring based in Kt9) to £88,612 (Mardon based in kt9), but these are just estimates. The best way to compare costs is to get real quotes from real builders.
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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 - £17,684

Two storey extension - £88,276

Build a timber frame extension - £26,184

Build a swimming pool - £81,184

Single storey extension - £58,680

Side return extension - £43,570

Install an RSJ - £2,384

Outbuilding - £10,184

Build a Mansard loft conversion - £52,184

Loft conversion - £35,475

Build a kitchen extension - £42,184

Hip to gable loft conversion - £42,184

Granny annexe - £87,184

Garden office - £10,184

Convert a Garage - £16,184

Garage - £18,684

Build a flat roof extension - £22,184

Build a dormer loft conversion - £42,184

Concrete foundations - £6,434

Convert a bungalow loft - £29,184

Convert a basement - £39,570