From £17,508
We are a family run business with 20 years experience.
We take great care and attention to the work we carry out and pride ourselves on ...
From £17,492
Need to find an Extension Builder near you for all your extension buildering work?
A B Building Roofing Services provides a local, trusted ...
From £17,468
Relax... you have found a reliable extension builder in S26. CS Construction & Conversions is a friendly and reliable company based in S26 who cons...
From £17,436
Trusted and professional extension builder in S26. Experienced in all extension buildering work and keeping within budget and on quote. Merebrook C...
From £17,436
Dore Decor are a family run business with over 30 years experience - we offer an extensive range of building services and are able to provide a ful...
From £17,612
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,844
Trusted and professional extension builder in S26. Experienced in all extension buildering work and keeping within budget and on quote. AMB Joinery...
From £17,588
Hallamshire Paving is an established and experienced local extension builder in S26. Please contact us for a free, no obligation quote and competit...
From £17,484
BP Builders are here to help customers who need an Extension Builder in S26. We offer a competitive rate to complete all your extension buildering ...

Underpinning ranges from £16,788 (JON WINDLE CONSTRUCTION based in S17) to £17,844 (AMB Joinery & Building Services based in S8), 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 S26 by posting a job with HaMuch and we will send it to extension builders in S26.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Wickersley | £33 | £257 |
| Underpin A Building near Rotherham | £33 | £257 |
| Underpin A Building near Worksop | £33 | £265 |
| Underpin A Building near Sheffield | £32 | £261 |
| Underpin A Building near Dronfield | £33 | £262 |
| Underpin A Building near Chesterfield | £33 | £257 |
| Underpin A Building near Doncaster | £29 | £238 |
| Underpin A Building near Bassetlaw | £31 | £243 |
| Underpin A Building near Mansfield Woodhouse | £33 | £263 |
| Underpin A Building near Retford | £31 | £243 |
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 - £17,466

Two storey extension - £87,948

Build a timber frame extension - £25,966

Build a swimming pool - £80,966

Single storey extension - £54,312

Side return extension - £41,113

Install an RSJ - £2,166

Outbuilding - £9,966

Build a Mansard loft conversion - £51,966

Loft conversion - £33,428

Build a kitchen extension - £41,966

Hip to gable loft conversion - £41,966

Granny annexe - £86,966

Garden office - £9,966

Convert a Garage - £15,966

Garage - £18,466

Build a flat roof extension - £21,966

Build a dormer loft conversion - £41,966

Concrete foundations - £6,216

Convert a bungalow loft - £28,966

Convert a basement - £37,113