Need to find an Extension Builder near you for all your extension buildering work?
6:59 Ltd provides a local, trusted extension buildering ...
Be Illuminated are here to help customers who need an Extension Builder in HP8. We offer a competitive rate to complete all your extension builderi...
Need to find an Extension Builder near you for all your extension buildering work?
JAYEM BUILDING SERVICES LTD provides a local, trusted ex...
CONSIDERATE BUILDING LIMITED are here to help customers who need an Extension Builder in HP8. We offer a competitive rate to complete all your exte...
Relax... you have found a reliable extension builder in HP8. J MCNAMEE J & J BUILDERS is a friendly and reliable company based in HP8 who consider ...
KATELL PROPERTY MAINTENANCE is a trusted extension builder serving customers in HP8 and the surrounding area. Contact us to today to get a competit...
From £17,788
Welcome to Velonia interiors Ltd my name is James Martin and I’m the director myself and my team have many years experience I will use subcontrac...
From £17,756
Need an Extension Builder in HP8? Mitre Peak Lofts Ltd has been helping local clients (10 mile radius) with their extension buildering jobs for man...
From £17,716
We are passionate about building bespoke homes using quality products that create unique features both internally and externally.
From £17,884
Carlos Gurrea is an established and experienced local extension builder in HP8. Please contact us for a free, no obligation quote and competitive r...

Underpinning ranges from £17,708 (JAYEM BUILDING SERVICES LTD based in HP9) to £18,356 (KATELL PROPERTY MAINTENANCE based in WD3), 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 HP8 by posting a job with HaMuch and we will send it to extension builders in HP8.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Gerrards Cross | £43 | £282 |
| Underpin A Building near Rickmansworth | £42 | £279 |
| Underpin A Building near Chesham | £42 | £277 |
| Underpin A Building near Hazlemere | £40 | £272 |
| Underpin A Building near Watford | £43 | £278 |
| Underpin A Building near Dacorum | £42 | £269 |
| Underpin A Building near Hillingdon | £63 | £276 |
| Underpin A Building near Berkhamsted | £41 | £263 |
| Underpin A Building near Hemel Hempstead | £42 | £270 |
| Underpin A Building near High Wycombe | £39 | £272 |
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 - £17,845

Two storey extension - £88,517

Build a timber frame extension - £26,345

Build a swimming pool - £81,345

Single storey extension - £61,896

Side return extension - £45,379

Install an RSJ - £2,545

Outbuilding - £10,345

Build a Mansard loft conversion - £52,345

Loft conversion - £36,983

Build a kitchen extension - £42,345

Hip to gable loft conversion - £42,345

Granny annexe - £87,345

Garden office - £10,345

Convert a Garage - £16,345

Garage - £18,845

Build a flat roof extension - £22,345

Build a dormer loft conversion - £42,345

Concrete foundations - £6,595

Convert a bungalow loft - £29,345

Convert a basement - £41,379