From £17,444
H VAUGHAN BUILDERS is an established extension buildering business in NP15. We come highly recommended and provide competitive quotes for your work...
From £17,244
OWEN BROTHERS CONSTRUCTION LTD are here to help customers who need an Extension Builder in NP15. We offer a competitive rate to complete all your e...
From £17,068
D BENDON CONSTRUCTION LTD is an established and experienced local extension builder in NP15. Please contact us for a free, no obligation quote and ...
From £17,484
Need to find an Extension Builder near you for all your extension buildering work?
PARTRIDGE - WILSON BUILDERS provides a local, trusted ex...
From £17,268
Our building services company JSP Carpentry & Building Services has 15 years of experience in the industry. Since then, we have been helping custom...
From £17,108
Relax... you have found a reliable extension builder in NP15. HEDLYN BUILDING CONTRACTORS is a friendly and reliable company based in NP15 who con...
From £17,316
Eric J Ivins is a trusted extension builder serving customers in NP15 and the surrounding area. Contact us to today to get a competitive quote for ...
From £17,324
LEE BAILEY BUILDING SERVICES are here to help customers who need an Extension Builder in NP15. We offer a competitive rate to complete all your ext...
From £17,364
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,300
Need to find an Extension Builder near you for all your extension buildering work?
A B CONSTRUCTION provides a local, trusted extension bui...

Underpinning ranges from £17,068 (D BENDON CONSTRUCTION LTD based in NP4) to £17,484 (PARTRIDGE - WILSON BUILDERS based in NP44), 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 NP15 by posting a job with HaMuch and we will send it to extension builders in NP15.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Pontypool | £26 | £183 |
| Underpin A Building near Cwmbran | £39 | £190 |
| Underpin A Building near Newport | £37 | £200 |
| Underpin A Building near Risca | £27 | £185 |
| Underpin A Building near Ebbw Vale | £24 | £195 |
| Underpin A Building near Tredegar | £24 | £195 |
| Underpin A Building near Caerphilly | £29 | £181 |
| Underpin A Building near Portishead | £29 | £221 |
| Underpin A Building near Bradley Stoke | £29 | £221 |
| Underpin A Building near Clevedon | £29 | £219 |
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 - £17,292

Two storey extension - £87,688

Build a timber frame extension - £25,792

Build a swimming pool - £80,792

Single storey extension - £50,840

Side return extension - £39,160

Install an RSJ - £1,992

Outbuilding - £9,792

Build a Mansard loft conversion - £51,792

Loft conversion - £31,800

Build a kitchen extension - £41,792

Hip to gable loft conversion - £41,792

Granny annexe - £86,792

Garden office - £9,792

Convert a Garage - £15,792

Garage - £18,292

Build a flat roof extension - £21,792

Build a dormer loft conversion - £41,792

Concrete foundations - £6,042

Convert a bungalow loft - £28,792

Convert a basement - £35,160