Ciaran Feeney
Need to find an Extension Builder near you for all your extension buildering work?
COMPLETE CIVIL ENGINEERING provides a local, trusted ext...
Volton Building & Paving is a trusted extension builder serving customers in HA8 and the surrounding area. Contact us to today to get a competitive...
Platinum Electrics is a Branch off Platinum Premier Projects who deal in all types of construction projects. Platinum Electrics are based in London...
Ashley Payravi
At crest construction we work extremely hard to ensure that our clients receive a quality of service that continues to build our reputation. Client...
Marcel Simion
Hi everyone!
i have good experience over 25 years working in construction and I have my on Business and my company
"I'm very happy for the job what his done" - LONDON,reviewed 29/09/17, SIMONA
BR Building Services Limited is a trusted extension builder serving customers in HA8 and the surrounding area. Contact us to today to get a competi...
Karsan Dabasia
Trusted and professional extension builder in HA8. Experienced in all extension buildering work and keeping within budget and on quote. EUROCONTRAC...
Manoj Basia
Need an Extension Builder in HA8? HONEST CONTRUCTION LIMITED has been helping local clients (5 mile radius) with their extension buildering jobs fo...
HARLEY BUILDING SERVICES LTD are here to help customers who need an Extension Builder in HA8. We offer a competitive rate to complete all your exte...
DBR Construction Ltd are here to help customers who need an Extension Builder in HA8. We offer a competitive rate to complete all your extension bu...

Underpinning ranges from £16,908 (DBR Construction Ltd based in NW7) to £17,940 (COMPLETE CIVIL ENGINEERING based in HA8), 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 HA8 by posting a job with HaMuch and we will send it to extension builders in HA8.
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 - £17,551

Two storey extension - £88,077

Build a timber frame extension - £26,051

Build a swimming pool - £81,051

Single storey extension - £56,024

Side return extension - £42,076

Install an RSJ - £2,251

Outbuilding - £10,051

Build a Mansard loft conversion - £52,051

Loft conversion - £34,230

Build a kitchen extension - £42,051

Hip to gable loft conversion - £42,051

Granny annexe - £87,051

Garden office - £10,051

Convert a Garage - £16,051

Garage - £18,551

Build a flat roof extension - £22,051

Build a dormer loft conversion - £42,051

Concrete foundations - £6,301

Convert a bungalow loft - £29,051

Convert a basement - £38,076