From £17,484
BP Builders are here to help customers who need an Extension Builder in S81. We offer a competitive rate to complete all your extension buildering ...
From £17,588
Hallamshire Paving is an established and experienced local extension builder in S81. Please contact us for a free, no obligation quote and competit...
From £17,756
Woodtec Joinery is an established extension buildering business in S81. We come highly recommended and provide competitive quotes for your work.
From £17,844
Trusted and professional extension builder in S81. Experienced in all extension buildering work and keeping within budget and on quote. AMB Joinery...
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 S81. CS Construction & Conversions is a friendly and reliable company based in S81 who cons...
From £17,436
Trusted and professional extension builder in S81. 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...

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 S81 by posting a job with HaMuch and we will send it to extension builders in S81.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Worksop | £33 | £265 |
| Underpin A Building near Bassetlaw | £31 | £243 |
| Underpin A Building near Retford | £31 | £243 |
| Underpin A Building near Wickersley | £33 | £257 |
| Underpin A Building near Rotherham | £33 | £257 |
| Underpin A Building near Mansfield Woodhouse | £33 | £262 |
| Underpin A Building near Forest Town | £33 | £262 |
| Underpin A Building near Doncaster | £29 | £238 |
| Underpin A Building near Mansfield | £33 | £261 |
| Underpin A Building near Sheffield | £32 | £261 |
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 - £17,480

Two storey extension - £87,970

Build a timber frame extension - £25,980

Build a swimming pool - £80,980

Single storey extension - £54,600

Side return extension - £41,275

Install an RSJ - £2,180

Outbuilding - £9,980

Build a Mansard loft conversion - £51,980

Loft conversion - £33,563

Build a kitchen extension - £41,980

Hip to gable loft conversion - £41,980

Granny annexe - £86,980

Garden office - £9,980

Convert a Garage - £15,980

Garage - £18,480

Build a flat roof extension - £21,980

Build a dormer loft conversion - £41,980

Concrete foundations - £6,230

Convert a bungalow loft - £28,980

Convert a basement - £37,275