From £17,444
Griana Builds is a trusted extension builder serving customers in West Kensington and the surrounding area. Contact us to today to get a competitiv...
From £17,836
Experienced extension builder ready to quote for your work. NuHome is the best extension builder in West Kensington. No obligation free quotes and ...
From £17,700
Relax... you have found a reliable extension builder in West Kensington. home refurbishments is a friendly and reliable company based in West Kensi...
From £17,444
Need to find an Extension Builder near you for all your extension buildering work?
2MO provides a local, trusted extension buildering servi...
From £17,636
2MO is a creative studio which was born in New York City and now has a new branch in London. We strive to create brilliant ideas and know exactly h...
From £17,716
New Line Construction Ltd are a family-run business with eighteen years’ experience and have been helping customers in London and the surrounding...
From £17,420
Need to find an Extension Builder near you for all your extension buildering work?
The Architects Of London provides a local, trusted exten...
From £17,924
DAMA CONSTRUCTION LTD is an established and experienced local extension builder in West Kensington. Please contact us for a free, no obligation quo...
From £17,868
Trusted and professional extension builder in West Kensington. Experienced in all extension buildering work and keeping within budget and on quote....
From £17,460
Rose Narmani is an interior design studio based in Kensington that specialises in interior design, interior styling and luxury furniture packages. ...

Underpinning ranges from £17,420 (The Architects Of London based in W8) to £17,924 (DAMA CONSTRUCTION LTD based in W14), 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 West Kensington by posting a job with HaMuch and we will send it to extension builders in West Kensington.
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 - £17,645

Two storey extension - £88,217

Build a timber frame extension - £26,145

Build a swimming pool - £81,145

Single storey extension - £57,896

Side return extension - £43,129

Install an RSJ - £2,345

Outbuilding - £10,145

Build a Mansard loft conversion - £52,145

Loft conversion - £35,108

Build a kitchen extension - £42,145

Hip to gable loft conversion - £42,145

Granny annexe - £87,145

Garden office - £10,145

Convert a Garage - £16,145

Garage - £18,645

Build a flat roof extension - £22,145

Build a dormer loft conversion - £42,145

Concrete foundations - £6,395

Convert a bungalow loft - £29,145

Convert a basement - £39,129