From £17,444
Need an Extension Builder in Knottingley? D & D Builders has been helping local clients (20 mile radius) with their extension buildering jobs for m...
From £17,420
Experienced extension builder ready to quote for your work. J W Building Services is the best extension builder in Knottingley. No obligation free ...
From £17,332
Need an Extension Builder in Knottingley? Watertight Roofing Leeds has been helping local clients (20 mile radius) with their extension buildering ...
From £17,340
Need to find an Extension Builder near you for all your extension buildering work?
full circle garden and design provides a local, trusted ...
From £17,132
Trusted and professional extension builder in Knottingley. Experienced in all extension buildering work and keeping within budget and on quote. Fea...
From £17,308
Trusted and professional extension builder in Knottingley. Experienced in all extension buildering work and keeping within budget and on quote. NE ...
From £17,364
DAVID HARRISON BUILDING are here to help customers who need an Extension Builder in Knottingley. We offer a competitive rate to complete all your e...
From £17,564
Prestine Property Maintenance Services is an established and experienced local extension builder in Knottingley. Please contact us for a free, no o...
From £17,316
Trusted and professional extension builder in Knottingley. Experienced in all extension buildering work and keeping within budget and on quote. Gar...
From £17,316
SJL Construction is a trusted extension builder serving customers in Knottingley and the surrounding area. Contact us to today to get a competitive...

Underpinning ranges from £17,132 (Fearnville Driveways based in LS8) to £17,564 (Prestine Property Maintenance Services based in YO8), 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 Knottingley by posting a job with HaMuch and we will send it to extension builders in Knottingley.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Pontefract | £30 | £228 |
| Underpin A Building near Castleford | £30 | £225 |
| Underpin A Building near Normanton | £30 | £233 |
| Underpin A Building near Rothwell | £30 | £230 |
| Underpin A Building near Selby | £30 | £240 |
| Underpin A Building near Wakefield | £31 | £240 |
| Underpin A Building near Beeston | £31 | £236 |
| Underpin A Building near Goole | £26 | £217 |
| Underpin A Building near Ossett | £33 | £245 |
| Underpin A Building near Chapeltown | £30 | £232 |
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 - £17,354

Two storey extension - £87,780

Build a timber frame extension - £25,854

Build a swimming pool - £80,854

Single storey extension - £52,072

Side return extension - £39,853

Install an RSJ - £2,054

Outbuilding - £9,854

Build a Mansard loft conversion - £51,854

Loft conversion - £32,378

Build a kitchen extension - £41,854

Hip to gable loft conversion - £41,854

Granny annexe - £86,854

Garden office - £9,854

Convert a Garage - £15,854

Garage - £18,354

Build a flat roof extension - £21,854

Build a dormer loft conversion - £41,854

Concrete foundations - £6,104

Convert a bungalow loft - £28,854

Convert a basement - £35,853