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...
From £17,244
OWEN BROTHERS CONSTRUCTION LTD are here to help customers who need an Extension Builder in NP7. We offer a competitive rate to complete all your ex...
From £17,372
Need an Extension Builder in NP7? P.D.Builders has been helping local clients (20 mile radius) with their extension buildering jobs for many years....
From £17,116
CHANDER CONSTRUCTION LIMITED is an established and experienced local extension builder in NP7. Please contact us for a free, no obligation quote an...
From £17,108
Relax... you have found a reliable extension builder in NP7. HEDLYN BUILDING CONTRACTORS is a friendly and reliable company based in NP7 who consi...
From £17,444
H VAUGHAN BUILDERS is an established extension buildering business in NP7. We come highly recommended and provide competitive quotes for your work....
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 £17,068
D BENDON CONSTRUCTION LTD is an established and experienced local extension builder in NP7. Please contact us for a free, no obligation quote and c...
From £16,916
Trusted and professional extension builder in NP7. Experienced in all extension buildering work and keeping within budget and on quote. M2 Building...
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...

Underpinning ranges from £16,916 (M2 Building & Landscaping based in NP13) 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 NP7 by posting a job with HaMuch and we will send it to extension builders in NP7.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Pontypool | £30 | £210 |
| Underpin A Building near Ebbw Vale | £28 | £218 |
| Underpin A Building near Tredegar | £28 | £218 |
| Underpin A Building near Cwmbran | £43 | £219 |
| Underpin A Building near Risca | £32 | £218 |
| Underpin A Building near Merthyr Tydfil | £33 | £220 |
| Underpin A Building near Newport | £41 | £233 |
| Underpin A Building near Caerphilly | £33 | £208 |
| Underpin A Building near Aberdare | £32 | £212 |
| Underpin A Building near Pontypridd | £33 | £211 |
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 - £17,232

Two storey extension - £87,598

Build a timber frame extension - £25,732

Build a swimming pool - £80,732

Single storey extension - £49,640

Side return extension - £38,485

Install an RSJ - £1,932

Outbuilding - £9,732

Build a Mansard loft conversion - £51,732

Loft conversion - £31,238

Build a kitchen extension - £41,732

Hip to gable loft conversion - £41,732

Granny annexe - £86,732

Garden office - £9,732

Convert a Garage - £15,732

Garage - £18,232

Build a flat roof extension - £21,732

Build a dormer loft conversion - £41,732

Concrete foundations - £5,982

Convert a bungalow loft - £28,732

Convert a basement - £34,485