Need to find an Extension Builder near you for all your extension buildering work?
OAK HOUSE BESPOKE BUILDERS provides a local, trusted ext...
Chessington, KT9
Need an Extension Builder in Chessington? FLUID CONSTRUCTION has been helping local clients (10 mile radius) with their extension buildering jobs f...
Trusted and professional extension builder in Chessington. Experienced in all extension buildering work and keeping within budget and on quote. CJC...
Need to find an Extension Builder near you for all your extension buildering work?
Leith All Building & Decorating provides a local, truste...
A H S Construction Design Ltd is an established and experienced local extension builder in Chessington. Please contact us for a free, no obligation...
P L CONTRACTORS DESIGN & BUILD is a trusted extension builder serving customers in Chessington and the surrounding area. Contact us to today to get...
Trusted and professional extension builder in Chessington. Experienced in all extension buildering work and keeping within budget and on quote. Emi...
Mick Winn
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...
We are a London based Design & Build construction company offering the following :Property Extensions and Major RenovationsBespoke Kitchens - Desig...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Mansard loft conversions range from the cheapest installation of £52,000 (Ascent Builders based in KT19) to the dearest of around £52,384 (CJC BUILDERS based in KT19).
While these estimates give you a good idea how much you'll pay for a mansard loft conversion, the only way to get an accurate price is to get real quotes from real builders.
Get quotes to install a mansard loft conversion in Chessington by posting a job with HaMuch and we'll send it to extension builders in Chessington.
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 - £17,730

Two storey extension - £88,346

Build a timber frame extension - £26,230

Build a swimming pool - £81,230

Single storey extension - £59,608

Side return extension - £44,092

Install an RSJ - £2,430

Outbuilding - £10,230

Build a Mansard loft conversion - £52,230

Loft conversion - £35,910

Build a kitchen extension - £42,230

Hip to gable loft conversion - £42,230

Granny annexe - £87,230

Garden office - £10,230

Convert a Garage - £16,230

Garage - £18,730

Build a flat roof extension - £22,230

Build a dormer loft conversion - £42,230

Concrete foundations - £6,480

Convert a bungalow loft - £29,230

Convert a basement - £40,092