From £17,908
Hackney, E8
Experienced extension builder ready to quote for your work. ATOM BUILD LTD T/A is the best extension builder in E8. No obligation free quotes and m...
From £17,836
Need to find an Extension Builder near you for all your extension buildering work?
UCDB Ltd provides a local, trusted extension buildering ...
From £17,820
Hackney, E8
Relax... you have found a reliable extension builder in E8. Carbin Canopy is a friendly and reliable company based in E8 who consider no job as too...
From £17,708
Trusted and professional extension builder in E8. Experienced in all extension buildering work and keeping within budget and on quote. Thermodynami...
From £17,860
Greater London, E8
Need an Extension Builder in E8? Sean & Stephen Ltd has been helping local clients (5 mile radius) with their extension buildering jobs for many ye...
From £17,692
Carland Builders Ltd are here to help customers who need an Extension Builder in E8. We offer a competitive rate to complete all your extension bui...
From £17,428
GS Fabric Ltd is an established and experienced local extension builder in E8. Please contact us for a free, no obligation quote and competitive ra...
From £17,956
D B Duri Building are here to help customers who need an Extension Builder in E8. We offer a competitive rate to complete all your extension builde...
From £17,796
Relax... you have found a reliable extension builder in E8. Hannah Construction is a friendly and reliable company based in E8 who consider no job ...
From £17,764
BLOCK Design & Build is an established extension buildering business in E8. We come highly recommended and provide competitive quotes for your work...

Underpinning ranges from £17,428 (GS Fabric Ltd based in E2) to £17,956 (D B Duri Building based in E8), 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 E8 by posting a job with HaMuch and we will send it to extension builders in E8.
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 - £17,777

Two storey extension - £88,415

Build a timber frame extension - £26,277

Build a swimming pool - £81,277

Single storey extension - £60,536

Side return extension - £44,614

Install an RSJ - £2,477

Outbuilding - £10,277

Build a Mansard loft conversion - £52,277

Loft conversion - £36,345

Build a kitchen extension - £42,277

Hip to gable loft conversion - £42,277

Granny annexe - £87,277

Garden office - £10,277

Convert a Garage - £16,277

Garage - £18,777

Build a flat roof extension - £22,277

Build a dormer loft conversion - £42,277

Concrete foundations - £6,527

Convert a bungalow loft - £29,277

Convert a basement - £40,614