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 Abergavenny. We offer a competitive rate to complete all...
From £17,372
Need an Extension Builder in Abergavenny? P.D.Builders has been helping local clients (20 mile radius) with their extension buildering jobs for man...
From £17,228
Experienced extension builder ready to quote for your work. Limitlesskitchens is the best extension builder in Abergavenny. No obligation free quot...
From £17,116
CHANDER CONSTRUCTION LIMITED is an established and experienced local extension builder in Abergavenny. Please contact us for a free, no obligation ...
From £17,108
Relax... you have found a reliable extension builder in Abergavenny. HEDLYN BUILDING CONTRACTORS is a friendly and reliable company based in Aberg...
From £17,444
H VAUGHAN BUILDERS is an established extension buildering business in Abergavenny. We come highly recommended and provide competitive quotes for yo...
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 Abergavenny. Please contact us for a free, no obligation quo...
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 £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 Abergavenny by posting a job with HaMuch and we will send it to extension builders in Abergavenny.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Pontypool | £30 | £210 |
| Underpin A Building near Ebbw Vale | £30 | £217 |
| Underpin A Building near Tredegar | £30 | £217 |
| 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 - £17,263

Two storey extension - £87,645

Build a timber frame extension - £25,763

Build a swimming pool - £80,763

Single storey extension - £50,264

Side return extension - £38,836

Install an RSJ - £1,963

Outbuilding - £9,763

Build a Mansard loft conversion - £51,763

Loft conversion - £31,530

Build a kitchen extension - £41,763

Hip to gable loft conversion - £41,763

Granny annexe - £86,763

Garden office - £9,763

Convert a Garage - £15,763

Garage - £18,263

Build a flat roof extension - £21,763

Build a dormer loft conversion - £41,763

Concrete foundations - £6,013

Convert a bungalow loft - £28,763

Convert a basement - £34,836