From £17,476
Greater London, UB6
Relax... you have found a reliable extension builder in UB6. LSD Design and Build Ltd is a friendly and reliable company based in UB6 who consider ...
From £17,756
A leading design and construction company, creating homes for clients who expect total attention to quality and detail. Our family business strives...
From £17,804
Greenford, UB6
Need to find an Extension Builder near you for all your extension buildering work?
Avon Ruby (UK) Limited provides a local, trusted extensi...
From £17,564
We focus mainly on major reconstructions of basements, lofts, extensions as well as new-build. We work with architects, construction site inspector...
From £17,892
Greater London, UB6
Insider Property is an established and experienced local extension builder in UB6. Please contact us for a free, no obligation quote and competitiv...
From £17,564
Experienced extension builder ready to quote for your work. GBG Building Services Ltd is the best extension builder in UB6. No obligation free quot...
From £17,988
Greater London, UB6
Established in 2005, we are London's main contractor with significant experience in prime property construction and refurbishment, delivering proje...
From £17,732
Caro Construction Ltd is an established and experienced local extension builder in UB6. Please contact us for a free, no obligation quote and compe...
From £17,932
perivale, UB6
With a wealth of experience, Mayfair Design & Build Limited can turn your dreams into reality. We are a family run organisation that specialises i...
From £17,548
EXTEND.HOUSE is a trusted extension builder serving customers in UB6 and the surrounding area. Contact us to today to get a competitive quote for e...

Underpinning ranges from £17,476 (LSD Design and Build Ltd based in UB6) to £17,988 (GBG Building Services Ltd based in UB6), 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 UB6 by posting a job with HaMuch and we will send it to extension builders in UB6.
"Underpinning for first floor extension" - UB6, job posted 01/01/70
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 - £17,726

Two storey extension - £88,338

Build a timber frame extension - £26,226

Build a swimming pool - £81,226

Single storey extension - £59,512

Side return extension - £44,038

Install an RSJ - £2,426

Outbuilding - £10,226

Build a Mansard loft conversion - £52,226

Loft conversion - £35,865

Build a kitchen extension - £42,226

Hip to gable loft conversion - £42,226

Granny annexe - £87,226

Garden office - £10,226

Convert a Garage - £16,226

Garage - £18,726

Build a flat roof extension - £22,226

Build a dormer loft conversion - £42,226

Concrete foundations - £6,476

Convert a bungalow loft - £29,226

Convert a basement - £40,038