From £17,396
Relax... you have found a reliable extension builder in Denbighshire. L & J BUILDERS is a friendly and reliable company based in Denbighshire who c...
From £16,948
We are a company with over 30 years of experience. Who pride ourselves by providing a honest reliable service
From £17,516
Experienced extension builder ready to quote for your work. READ CONSTRUCTION HOLDINGS LTD is the best extension builder in Denbighshire. No obliga...
From £17,548
Experienced extension builder ready to quote for your work. Guest & Roberts is the best extension builder in Denbighshire. No obligation free quote...
From £18,084
Relax... you have found a reliable extension builder in Denbighshire. David Williams General Builder & Maintenance is a friendly and reliable compa...
From £17,572
DMS Building Services are here to help customers who need an Extension Builder in Denbighshire. We offer a competitive rate to complete all your ex...
From £17,372
Need to find an Extension Builder near you for all your extension buildering work?
A M F BUILDING SERVICES provides a local, trusted extens...
From £17,148
Need an Extension Builder in Denbighshire? P WALKER JOINERY & BUILDING has been helping local clients (20 mile radius) with their extension builder...
From £17,428
Trusted and professional extension builder in Denbighshire. Experienced in all extension buildering work and keeping within budget and on quote. K ...
From £17,516
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Underpinning ranges from £16,948 (S A Davies Sustainable Construction Limited based in CH7) to £18,084 (David Williams General Builder & Maintenance based in LL11), 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 Denbighshire by posting a job with HaMuch and we will send it to extension builders in Denbighshire.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Flintshire | £33 | £224 |
| Underpin A Building near Wrexham | £34 | £263 |
| Underpin A Building near Hawarden | £33 | £228 |
| Underpin A Building near Connah's Quay | £33 | £229 |
| Underpin A Building near Vale Royal | £35 | £251 |
| Underpin A Building near Wrexham Maelor | £34 | £261 |
| Underpin A Building near Rhyl | £28 | £209 |
| Underpin A Building near Prestatyn | £29 | £213 |
| Underpin A Building near Heswall | £30 | £213 |
| Underpin A Building near Chester | £32 | £220 |
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 - £17,453

Two storey extension - £87,929

Build a timber frame extension - £25,953

Build a swimming pool - £80,953

Single storey extension - £54,056

Side return extension - £40,969

Install an RSJ - £2,153

Outbuilding - £9,953

Build a Mansard loft conversion - £51,953

Loft conversion - £33,308

Build a kitchen extension - £41,953

Hip to gable loft conversion - £41,953

Granny annexe - £86,953

Garden office - £9,953

Convert a Garage - £15,953

Garage - £18,453

Build a flat roof extension - £21,953

Build a dormer loft conversion - £41,953

Concrete foundations - £6,203

Convert a bungalow loft - £28,953

Convert a basement - £36,969