From £17,252
Experienced extension builder ready to quote for your work. Kingsley Developments is the best extension builder in Newport. No obligation free quot...
From £17,420
Kingsley Developments is an established and experienced local extension builder in Newport. Please contact us for a free, no obligation quote and c...
From £17,212
PMW Property Services Ltd is an established and experienced local extension builder in Newport. Please contact us for a free, no obligation quote a...
From £17,260
Sharif General Builder is an established and experienced local extension builder in Newport. Please contact us for a free, no obligation quote and ...
From £17,412
Relax... you have found a reliable extension builder in Newport. Ace Paving is a friendly and reliable company based in Newport who consider no job...
From £17,500
Trusted and professional extension builder in Newport. Experienced in all extension buildering work and keeping within budget and on quote. A P FOR...
From £17,556
Matthew O'Brien is an established and experienced local extension builder in Newport. Please contact us for a free, no obligation quote and competi...
From £17,292
T Porter Buiding is an established and experienced local extension builder in Newport. Please contact us for a free, no obligation quote and compet...
From £17,492
Relax... you have found a reliable extension builder in Newport. RKD Maintenance & Construction is a friendly and reliable company based in Newport...
From £17,356
Newport, NP10
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Underpinning ranges from £17,212 (PMW Property Services Ltd based in NP20) to £17,556 (Matthew O'Brien based in NP19), 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 Newport by posting a job with HaMuch and we will send it to extension builders in Newport.
| 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 Caerphilly | £33 | £208 |
| Underpin A Building near Pontypool | £30 | £210 |
| Underpin A Building near Cardiff | £34 | £219 |
| Underpin A Building near Clevedon | £32 | £243 |
| Underpin A Building near Portishead | £33 | £247 |
| Underpin A Building near Penarth | £35 | £218 |
| 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 - £17,375

Two storey extension - £87,813

Build a timber frame extension - £25,875

Build a swimming pool - £80,875

Single storey extension - £52,504

Side return extension - £40,096

Install an RSJ - £2,075

Outbuilding - £9,875

Build a Mansard loft conversion - £51,875

Loft conversion - £32,580

Build a kitchen extension - £41,875

Hip to gable loft conversion - £41,875

Granny annexe - £86,875

Garden office - £9,875

Convert a Garage - £15,875

Garage - £18,375

Build a flat roof extension - £21,875

Build a dormer loft conversion - £41,875

Concrete foundations - £6,125

Convert a bungalow loft - £28,875

Convert a basement - £36,096