From £17,780
Epsom, KT19
Need an Extension Builder in KT19? SJD Building Services has been helping local clients (10 mile radius) with their extension buildering jobs for m...
From £17,884
Trusted and professional extension builder in KT19. Experienced in all extension buildering work and keeping within budget and on quote. CJC BUILDE...
From £17,580
Surrey, KT19
Need an Extension Builder in KT19? Jewel Group Ltd has been helping local clients (10 mile radius) with their extension buildering jobs for many ye...
From £17,644
Trusted and professional extension builder in KT19. Experienced in all extension buildering work and keeping within budget and on quote. YORKE CONS...
From £17,436
Horton, KT19
Trusted and professional extension builder in KT19. Experienced in all extension buildering work and keeping within budget and on quote. DE SELINCO...
From £17,716
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,972
I am a profesional work contractor who can put your whole project together. I will assume complete responsibility for the work contracted and give ...
From £17,676
Extensions, Loft and garage conversions, New builds, Design and build, Project management
From £17,500
Surrey, KT19
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 £17,564
Grand Nests is an established extension buildering business in KT19. We come highly recommended and provide competitive quotes for your work.

Underpinning ranges from £17,436 (DE SELINCOURT CONSTRUCTION based in KT19) to £17,972 (KJ Construction LTD based in kt17), but the final cost will depend on the method of underpinning used, how much of your foundations need underpinning and where you live.
Comparing extension builders estimates for underpinning gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
Get quotes to underpin your home in KT19 by posting a job with HaMuch and we will send it to extension builders in KT19.
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 - £17,675

Two storey extension - £88,263

Build a timber frame extension - £26,175

Build a swimming pool - £81,175

Single storey extension - £58,504

Side return extension - £43,471

Install an RSJ - £2,375

Outbuilding - £10,175

Build a Mansard loft conversion - £52,175

Loft conversion - £35,393

Build a kitchen extension - £42,175

Hip to gable loft conversion - £42,175

Granny annexe - £87,175

Garden office - £10,175

Convert a Garage - £16,175

Garage - £18,675

Build a flat roof extension - £22,175

Build a dormer loft conversion - £42,175

Concrete foundations - £6,425

Convert a bungalow loft - £29,175

Convert a basement - £39,471