From £22,352
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 £21,792
West Ewell flooring: covering all aspects of flooring supply and fitting service. please contact us for inquiries
From £22,040
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 £22,272
Need to find an Extension Builder near you for all your extension buildering work?
OAK HOUSE BESPOKE BUILDERS provides a local, trusted ext...
From £22,408
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 £22,000
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 £22,352
We are a London based Design & Build construction company offering the following :Property Extensions and Major RenovationsBespoke Kitchens - Desig...
From £22,096
Experienced extension builder ready to quote for your work. Martini Building Contractors is the best extension builder in KT9. No obligation free q...
From £22,392
solaes construction is an established extension buildering business in KT9. We come highly recommended and provide competitive quotes for your work...
From £22,136
Trusted and professional extension builder in KT9. Experienced in all extension buildering work and keeping within budget and on quote. Active Fox ...

A flat roof extension ranges from the cheapest of £21,792 (West Ewell flooring based in Kt9) to the dearest of £22,408 (Mardon based in kt9), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes.
Find out how much your flat roof extension will cost in KT9 by posting a job with HaMuch. We'll send it to extension builders in KT9.
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