From £17,356
S.G. Joinery & Building is a well-established company setup over 15 years ago and working in the Poulton-le-Fylde , Preston ,Garstang and ...
From £17,220
Conway Construction Ltd is an established extension buildering business in Thornton. We come highly recommended and provide competitive quotes for ...
From £17,332
Need an Extension Builder in Thornton? John Towers Builders has been helping local clients (20 mile radius) with their extension buildering jobs fo...
From £17,396
Need to find an Extension Builder near you for all your extension buildering work?
J.L Noblet provides a local, trusted extension builderin...
From £17,268
Relax... you have found a reliable extension builder in Thornton. Crown Construction Lancs Ltd is a friendly and reliable company based in Thornton...
From £17,028
Need an Extension Builder in Thornton? Darren Finney Builders has been helping local clients (20 mile radius) with their extension buildering jobs ...
From £17,052
Comprehensive Property Services is an established and experienced local extension builder in Thornton. Please contact us for a free, no obligation ...
From £17,500
Trusted and professional extension builder in Thornton. Experienced in all extension buildering work and keeping within budget and on quote. O. Mor...
From £17,260
Attention to detail. Member of safe trader. Recommendations References available.
From £17,212
Smedley Construction Ltd is a trusted extension builder serving customers in Thornton and the surrounding area. Contact us to today to get a compet...

Underpinning ranges from £17,028 (Darren Finney Builders based in PR25) to £17,500 (O. Morris Construction based in PR5), 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 Thornton by posting a job with HaMuch and we will send it to extension builders in Thornton.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Thornton | £29 | £211 |
| Underpin A Building near Fleetwood | £28 | £206 |
| Underpin A Building near Blackpool | £29 | £209 |
| Underpin A Building near Lytham St Annes | £28 | £206 |
| Underpin A Building near Fulwood | £31 | £217 |
| Underpin A Building near Penwortham | £30 | £218 |
| Underpin A Building near Preston | £30 | £218 |
| Underpin A Building near Lancaster | £25 | £211 |
| Underpin A Building near Morecambe | £25 | £212 |
| Underpin A Building near Southport | £27 | £198 |
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 - £17,262

Two storey extension - £87,644

Build a timber frame extension - £25,762

Build a swimming pool - £80,762

Single storey extension - £50,248

Side return extension - £38,827

Install an RSJ - £1,962

Outbuilding - £9,762

Build a Mansard loft conversion - £51,762

Loft conversion - £31,523

Build a kitchen extension - £41,762

Hip to gable loft conversion - £41,762

Granny annexe - £86,762

Garden office - £9,762

Convert a Garage - £15,762

Garage - £18,262

Build a flat roof extension - £21,762

Build a dormer loft conversion - £41,762

Concrete foundations - £6,012

Convert a bungalow loft - £28,762

Convert a basement - £34,827