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Select your affordable Cwmbran extension builder
Alan Gaddarn
Very reliable honest and hard working guarantee all work clean and tidy first class work
T Porter Buiding is an established and experienced local extension builder in Cwmbran. Please contact us for a free, no obligation quote and compet...
Sharif General Builder is an established and experienced local extension builder in Cwmbran. Please contact us for a free, no obligation quote and ...
Cwmbran, NP44
Need to find an Extension Builder near you for all your extension buildering work?
PARTRIDGE - WILSON BUILDERS provides a local, trusted ex...
D BENDON CONSTRUCTION LTD is an established and experienced local extension builder in Cwmbran. Please contact us for a free, no obligation quote a...
OWEN BROTHERS CONSTRUCTION LTD are here to help customers who need an Extension Builder in Cwmbran. We offer a competitive rate to complete all you...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
, NP44
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Relax... you have found a reliable extension builder in Cwmbran. Ace Paving is a friendly and reliable company based in Cwmbran who consider no job...
Need to find an Extension Builder near you for all your extension buildering work?
ABS Allied Trades provides a local, trusted extension bu...

Underpinning ranges from £16,700 (A.Gaddarn Builders based in NP11) 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 Cwmbran by posting a job with HaMuch and we will send it to extension builders in Cwmbran.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Cwmbran | £43 | £219 |
| Underpin A Building near Risca | £32 | £218 |
| Underpin A Building near Newport | £41 | £233 |
| Underpin A Building near Pontypool | £30 | £210 |
| Underpin A Building near Caerphilly | £33 | £208 |
| Underpin A Building near Ebbw Vale | £30 | £217 |
| Underpin A Building near Tredegar | £30 | £217 |
| Underpin A Building near Cardiff | £34 | £223 |
| Underpin A Building near Pontypridd | £33 | £211 |
| Underpin A Building near Church Village | £34 | £214 |
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 - £17,215

Two storey extension - £87,573

Build a timber frame extension - £25,715

Build a swimming pool - £80,715

Single storey extension - £49,304

Side return extension - £38,296

Install an RSJ - £1,915

Outbuilding - £9,715

Build a Mansard loft conversion - £51,715

Loft conversion - £31,080

Build a kitchen extension - £41,715

Hip to gable loft conversion - £41,715

Granny annexe - £86,715

Garden office - £9,715

Convert a Garage - £15,715

Garage - £18,215

Build a flat roof extension - £21,715

Build a dormer loft conversion - £41,715

Concrete foundations - £5,965

Convert a bungalow loft - £28,715

Convert a basement - £34,296