From £17,380
Relax... you have found a reliable extension builder in Monmouth. A M I Construction is a friendly and reliable company based in Monmouth who consi...
From £17,292
T Porter Buiding is an established and experienced local extension builder in Monmouth. Please contact us for a free, no obligation quote and compe...
From £17,260
Sharif General Builder is an established and experienced local extension builder in Monmouth. Please contact us for a free, no obligation quote and...
From £17,052
Small company .
friendly reliable service
Excellent quality of workmanship
...
From £17,228
Experienced extension builder ready to quote for your work. Limitlesskitchens is the best extension builder in Monmouth. No obligation free quotes ...
From £17,372
New Haven Construction Group Ltd is an established extension buildering business in Monmouth. We come highly recommended and provide competitive qu...
From £17,684
Need to find an Extension Builder near you for all your extension buildering work?
WILSONS BUILDERS CO LTD provides a local, trusted extens...
From £17,284
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,260
Monmouth, NP25
The Green Team is an established and experienced local extension builder in Monmouth. Please contact us for a free, no obligation quote and competi...
From £17,316
Eric J Ivins is a trusted extension builder serving customers in Monmouth and the surrounding area. Contact us to today to get a competitive quote ...

Underpinning ranges from £17,052 (Timtec Building Services based in HR9) to £17,684 (WILSONS BUILDERS CO LTD based in GL12), 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 Monmouth by posting a job with HaMuch and we will send it to extension builders in Monmouth.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Pontypool | £30 | £210 |
| Underpin A Building near Cwmbran | £43 | £219 |
| Underpin A Building near Hereford | £30 | £228 |
| Underpin A Building near Quedgeley | £32 | £247 |
| Underpin A Building near Newport | £41 | £233 |
| Underpin A Building near Bradley Stoke | £34 | £259 |
| Underpin A Building near Ebbw Vale | £30 | £217 |
| Underpin A Building near Risca | £32 | £218 |
| Underpin A Building near Gloucester | £31 | £236 |
| Underpin A Building near South Gloucestershire | £34 | £260 |
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 - £17,313

Two storey extension - £87,719

Build a timber frame extension - £25,813

Build a swimming pool - £80,813

Single storey extension - £51,256

Side return extension - £39,394

Install an RSJ - £2,013

Outbuilding - £9,813

Build a Mansard loft conversion - £51,813

Loft conversion - £31,995

Build a kitchen extension - £41,813

Hip to gable loft conversion - £41,813

Granny annexe - £86,813

Garden office - £9,813

Convert a Garage - £15,813

Garage - £18,313

Build a flat roof extension - £21,813

Build a dormer loft conversion - £41,813

Concrete foundations - £6,063

Convert a bungalow loft - £28,813

Convert a basement - £35,394