From £17,372
Rhyl, LL18
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £16,916
Rhyl, LL18
Octagon Construction Ltd is a trusted extension builder serving customers in Rhyl and the surrounding area. Contact us to today to get a competitiv...
From £17,332
Rhyl, LL18
Wood floor services is a trusted extension builder serving customers in Rhyl and the surrounding area. Contact us to today to get a competitive qu...
From £16,956
S ROBERTS ROOFING are here to help customers who need an Extension Builder in Rhyl. We offer a competitive rate to complete all your extension buil...
From £16,948
We are a company with over 30 years of experience. Who pride ourselves by providing a honest reliable service
From £17,076
, LL28
Relax... you have found a reliable extension builder in Rhyl. UK Leisure Living Ltd is a friendly and reliable company based in Rhyl who consider n...
From £17,300
Need an Extension Builder in Rhyl? Chris's Roofing & Property Maintenance has been helping local clients (20 mile radius) with their extension buil...
From £17,396
Relax... you have found a reliable extension builder in Rhyl. L & J BUILDERS is a friendly and reliable company based in Rhyl who consider no job a...
From £17,324
GF Construction, headed by Gary Flower, are a team of highly skilled and experienced builders operating out of Moreton, and serving the Wirral and ...
From £17,076
Relax... you have found a reliable extension builder in Rhyl. A.B Building Services Ltd is a friendly and reliable company based in Rhyl who consid...

Underpinning ranges from £16,916 (Octagon Construction Ltd based in LL18) to £17,396 (L & J BUILDERS based in LL15), 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 Rhyl by posting a job with HaMuch and we will send it to extension builders in Rhyl.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Rhyl | £28 | £209 |
| Underpin A Building near Prestatyn | £29 | £213 |
| Underpin A Building near Colwyn Bay | £28 | £211 |
| Underpin A Building near Llandudno | £28 | £211 |
| Underpin A Building near Conway | £28 | £211 |
| Underpin A Building near Conwy | £28 | £211 |
| Underpin A Building near Heswall | £30 | £213 |
| Underpin A Building near Flintshire | £33 | £224 |
| Underpin A Building near Wirral | £31 | £219 |
| Underpin A Building near Connah's Quay | £33 | £229 |
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 - £17,170

Two storey extension - £87,504

Build a timber frame extension - £25,670

Build a swimming pool - £80,670

Single storey extension - £48,392

Side return extension - £37,783

Install an RSJ - £1,870

Outbuilding - £9,670

Build a Mansard loft conversion - £51,670

Loft conversion - £30,653

Build a kitchen extension - £41,670

Hip to gable loft conversion - £41,670

Granny annexe - £86,670

Garden office - £9,670

Convert a Garage - £15,670

Garage - £18,170

Build a flat roof extension - £21,670

Build a dormer loft conversion - £41,670

Concrete foundations - £5,920

Convert a bungalow loft - £28,670

Convert a basement - £33,783