From £17,972
Warm welcome to MS Contractor ltd, Established in 1999 and incorporated in 2005. MS Contractor company based in Chelsea, London. Formed by a dynami...
From £17,716
At Atica Ltd we are experts in construction. We are able to offer a wide range of building services and we are working on both: design and build an...
From £17,988
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,652
Relax... you have found a reliable extension builder in West Brompton. Aflux Designs is a friendly and reliable company based in West Brompton who ...
From £17,908
We are an experienced London based design and build company, offering a full service that is all about creating beautiful homes that our clients lo...
From £17,732
At our boutique design studio in the heart of Chelsea, we offer bespoke interior and architectural design services catering to discerning clients s...
From £17,924
Builders by Design Ltd are here to help customers who need an Extension Builder in West Brompton. We offer a competitive rate to complete all your ...
From £17,700
Olga Ashby established her own design studio in 2009 to provide clients with a creative and professional interior design service.Olga graduated fro...
From £17,868
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Underpinning ranges from £17,652 (Aflux Designs based in SW10) to £17,988 (Short Let Management Ltd based in SW10), 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 Brompton by posting a job with HaMuch and we will send it to extension builders in West Brompton.
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 - £17,822

Two storey extension - £88,482

Build a timber frame extension - £26,322

Build a swimming pool - £81,322

Single storey extension - £61,432

Side return extension - £45,118

Install an RSJ - £2,522

Outbuilding - £10,322

Build a Mansard loft conversion - £52,322

Loft conversion - £36,765

Build a kitchen extension - £42,322

Hip to gable loft conversion - £42,322

Granny annexe - £87,322

Garden office - £10,322

Convert a Garage - £16,322

Garage - £18,822

Build a flat roof extension - £22,322

Build a dormer loft conversion - £42,322

Concrete foundations - £6,572

Convert a bungalow loft - £29,322

Convert a basement - £41,118