From £16,972
Trusted and professional extension builder in Holywell. Experienced in all extension buildering work and keeping within budget and on quote. Jones ...
From £17,172
J.M.C Building Services is a trusted extension builder serving customers in Holywell and the surrounding area. Contact us to today to get a competi...
From £17,532
Tong Building & Joinery Ltd are here to help customers who need an Extension Builder in Holywell. We offer a competitive rate to complete all your ...
From £17,556
AJ Solutions is an established extension buildering business in Holywell. We come highly recommended and provide competitive quotes for your work.<...
From £17,476
Nathan Thomas Plumbing is an established extension buildering business in Holywell. We come highly recommended and provide competitive quotes for y...
From £17,196
G P Roofing & Building Service is a trusted extension builder serving customers in Holywell and the surrounding area. Contact us to today to get a ...
From £17,204
Need an Extension Builder in Holywell? MIDDLETON CONSTRUCTION (NW)LTD has been helping local clients (20 mile radius) with their extension builderi...
From £17,268
A WALL BUILDING CONTRACTOR are here to help customers who need an Extension Builder in Holywell. We offer a competitive rate to complete all your e...
From £17,084
Experienced extension builder ready to quote for your work. Matthew Hannigan Garage Doors is the best extension builder in Holywell. No obligation ...
From £17,148
Need an Extension Builder in Holywell? P WALKER JOINERY & BUILDING has been helping local clients (20 mile radius) with their extension buildering ...

Underpinning ranges from £16,972 (Jones Landscaping based in L30) to £17,556 (AJ Solutions based in CH1), 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 Holywell by posting a job with HaMuch and we will send it to extension builders in Holywell.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Heswall | £30 | £213 |
| Underpin A Building near Prestatyn | £29 | £213 |
| Underpin A Building near Connah's Quay | £33 | £229 |
| Underpin A Building near Flintshire | £33 | £224 |
| Underpin A Building near Wirral | £31 | £219 |
| Underpin A Building near Rhyl | £28 | £209 |
| Underpin A Building near Bebington | £31 | £222 |
| Underpin A Building near Hawarden | £33 | £228 |
| Underpin A Building near Birkenhead | £31 | £219 |
| Underpin A Building near Wallasey | £32 | £224 |
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 - £17,261

Two storey extension - £87,641

Build a timber frame extension - £25,761

Build a swimming pool - £80,761

Single storey extension - £50,216

Side return extension - £38,809

Install an RSJ - £1,961

Outbuilding - £9,761

Build a Mansard loft conversion - £51,761

Loft conversion - £31,508

Build a kitchen extension - £41,761

Hip to gable loft conversion - £41,761

Granny annexe - £86,761

Garden office - £9,761

Convert a Garage - £15,761

Garage - £18,261

Build a flat roof extension - £21,761

Build a dormer loft conversion - £41,761

Concrete foundations - £6,011

Convert a bungalow loft - £28,761

Convert a basement - £34,809