T Porter Buiding is an established and experienced local extension builder in NP19. Please contact us for a free, no obligation quote and competiti...
Sharif General Builder is an established and experienced local extension builder in NP19. Please contact us for a free, no obligation quote and com...
Relax... you have found a reliable extension builder in NP19. Ace Paving is a friendly and reliable company based in NP19 who consider no job as to...
Need to find an Extension Builder near you for all your extension buildering work?
GML Builders provides a local, trusted extension builder...
From £17,492
Relax... you have found a reliable extension builder in NP19. RKD Maintenance & Construction is a friendly and reliable company based in NP19 who c...
From £17,212
PMW Property Services Ltd is an established and experienced local extension builder in NP19. Please contact us for a free, no obligation quote and ...
From £17,356
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,804
Sam Atkins
Experienced extension builder ready to quote for your work. Carter Thomas Construction Ltd is the best extension builder in NP19. No obligation fre...
From £17,252
Experienced extension builder ready to quote for your work. Kingsley Developments is the best extension builder in NP19. No obligation free quotes ...
From £17,420
Kingsley Developments is an established and experienced local extension builder in NP19. Please contact us for a free, no obligation quote and comp...

Underpinning ranges from £17,164 (GML Builders based in NP10) to £17,804 (Carter Thomas Construction Ltd based in NP18), 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 NP19 by posting a job with HaMuch and we will send it to extension builders in NP19.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Newport | £41 | £233 |
| Underpin A Building near Cwmbran | £43 | £219 |
| Underpin A Building near Risca | £32 | £218 |
| Underpin A Building near Pontypool | £30 | £210 |
| Underpin A Building near Caerphilly | £33 | £208 |
| Underpin A Building near Clevedon | £32 | £243 |
| Underpin A Building near Portishead | £33 | £247 |
| Underpin A Building near Cardiff | £34 | £219 |
| Underpin A Building near Penarth | £35 | £219 |
| 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 - £17,366

Two storey extension - £87,800

Build a timber frame extension - £25,866

Build a swimming pool - £80,866

Single storey extension - £52,328

Side return extension - £39,997

Install an RSJ - £2,066

Outbuilding - £9,866

Build a Mansard loft conversion - £51,866

Loft conversion - £32,498

Build a kitchen extension - £41,866

Hip to gable loft conversion - £41,866

Granny annexe - £86,866

Garden office - £9,866

Convert a Garage - £15,866

Garage - £18,366

Build a flat roof extension - £21,866

Build a dormer loft conversion - £41,866

Concrete foundations - £6,116

Convert a bungalow loft - £28,866

Convert a basement - £35,997