From £17,500
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of work in DN12 an...
From £17,460
Ajf builddrs is a trusted extension builder serving customers in DN12 and the surrounding area. Contact us to today to get a competitive quote for ...
From £17,340
Trusted and professional extension builder in DN12. Experienced in all work and keeping within budget and on quote. Britishbuildogs have many happ...
From £17,716
At Northfield General Builders Ltd we pride ourselves on being the go-to bathroom fitters for discerning customers in the Doncaster area.At...
From £17,380
Turner Roofing is an established and experienced local extension builder in DN12. Please contact us for a free, no obligation quote and competitive...
From £17,692
W Hall is an established and experienced local extension builder in DN12. Please contact us for a free, no obligation quote and competitive rates. ...
From £17,468
Relax... you have found a reliable extension builder in DN12. CS Construction & Conversions is a friendly and reliable company based in DN12 who co...
From £17,604
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of work in DN12 an...
From £17,644
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of work in DN12 an...
From £17,164
1980 are here to help customers who need an Extension Builder in DN12. We offer a competitive rate to complete all your jobs to professional stand...

Underpinning ranges from £17,164 (1980 based in DN2) to £17,716 (Northfield General Builders Ltd based in DN2), 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 DN12 by posting a job with HaMuch and we will send it to extension builders in DN12.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Doncaster | £26 | £208 |
| Underpin A Building near Wickersley | £29 | £224 |
| Underpin A Building near Rotherham | £29 | £226 |
| Underpin A Building near Barnsley | £27 | £210 |
| Underpin A Building near Sheffield | £30 | £246 |
| Underpin A Building near Worksop | £29 | £233 |
| Underpin A Building near Pontefract | £26 | £202 |
| Underpin A Building near Bassetlaw | £28 | £214 |
| Underpin A Building near Retford | £28 | £214 |
| Underpin A Building near Dronfield | £31 | £253 |
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 - £17,497

Two storey extension - £87,995

Build a timber frame extension - £25,997

Build a swimming pool - £80,997

Single storey extension - £54,936

Side return extension - £41,464

Install an RSJ - £2,197

Outbuilding - £9,997

Build a Mansard loft conversion - £51,997

Loft conversion - £33,720

Build a kitchen extension - £41,997

Hip to gable loft conversion - £41,997

Granny annexe - £86,997

Garden office - £9,997

Convert a Garage - £15,997

Garage - £18,497

Build a flat roof extension - £21,997

Build a dormer loft conversion - £41,997

Concrete foundations - £6,247

Convert a bungalow loft - £28,997

Convert a basement - £37,464