From £17,796
MAF Contracts Ltd is a South-West London based construction company with a track record of providing high-quality building services at a fair price...
From £17,732
Earlsfield Londonderry, SW18
The Sash Factory is an established extension buildering business in Earlsfield. We come highly recommended and provide competitive quotes for your ...
From £17,356
Finethorp Limited (Renovations) is a trusted extension builder serving customers in Earlsfield and the surrounding area. Contact us to today to get...
From £17,580
Earlsfield, SW18
Experienced extension builder ready to quote for your work. Finethorp Limited is the best extension builder in Earlsfield. No obligation free quote...
From £17,564
Need to find an Extension Builder near you for all your extension buildering work?
Beatrix Renovations and Repairs provides a local, truste...
From £17,908
Earlsfield, SW18
Need an Extension Builder in Earlsfield? KRANE CONSTRUCTION LIMITED has been helping local clients (5 mile radius) with their extension buildering ...
From £17,636
Newspace Interiors is an established extension buildering business in Earlsfield. We come highly recommended and provide competitive quotes for you...
From £17,700
Earlsfield Surrey, SW18
We are a full design and build company helping you to turn your ideas into reality. We mainly deliver renovation projects in South West London but ...
From £17,540
Trusted and professional extension builder in Earlsfield. Experienced in all extension buildering work and keeping within budget and on quote. Enco...
From £17,564
Earlsfield Greater London, SW18
Trusted and professional extension builder in Earlsfield. Experienced in all extension buildering work and keeping within budget and on quote. Savi...

Underpinning ranges from £17,356 (Finethorp Limited (Renovations) based in SW18) to £17,908 (KRANE CONSTRUCTION LIMITED based in SW18), 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 Earlsfield by posting a job with HaMuch and we will send it to extension builders in Earlsfield.
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 - £17,638

Two storey extension - £88,206

Build a timber frame extension - £26,138

Build a swimming pool - £81,138

Single storey extension - £57,752

Side return extension - £43,048

Install an RSJ - £2,338

Outbuilding - £10,138

Build a Mansard loft conversion - £52,138

Loft conversion - £35,040

Build a kitchen extension - £42,138

Hip to gable loft conversion - £42,138

Granny annexe - £87,138

Garden office - £10,138

Convert a Garage - £16,138

Garage - £18,638

Build a flat roof extension - £22,138

Build a dormer loft conversion - £42,138

Concrete foundations - £6,388

Convert a bungalow loft - £29,138

Convert a basement - £39,048