From £17,468
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,236
Need an Extension Builder in County Durham? Northern Roofline Solutions has been helping local clients (20 mile radius) with their extension builde...
From £17,420
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,564
Croft-Hill Building & Joinery is a trusted extension builder serving customers in County Durham and the surrounding area. Contact us to today to ge...
From £17,540
Need to find an Extension Builder near you for all your extension buildering work?
SBC (BUILDERS) LIMITED provides a local, trusted extensi...
From £17,380
J.collinson is an established and experienced local extension builder in County Durham. Please contact us for a free, no obligation quote and compe...
From £17,260
Need an Extension Builder in County Durham? K & J Property has been helping local clients (20 mile radius) with their extension buildering jobs for...
From £17,500
Relax... you have found a reliable extension builder in County Durham. AA Paving is a friendly and reliable company based in County Durham who cons...
From £17,348
Need to find an Extension Builder near you for all your extension buildering work?
ANWEN CONSTRUCTION provides a local, trusted extension b...

Underpinning ranges from £17,236 (Northern Roofline Solutions based in DL14) to £17,764 (Heritage NE Ltd based in DL17), 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 County Durham by posting a job with HaMuch and we will send it to extension builders in County Durham.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Bishop Auckland | £39 | £247 |
| Underpin A Building near Spennymoor | £38 | £248 |
| Underpin A Building near Newton Aycliffe | £39 | £227 |
| Underpin A Building near Durham | £47 | £267 |
| Underpin A Building near Darlington | £60 | £222 |
| Underpin A Building near Consett | £33 | £241 |
| Underpin A Building near Stanley | £34 | £242 |
| Underpin A Building near Chester-le-Street | £35 | £242 |
| Underpin A Building near Peterlee | £35 | £222 |
| Underpin A Building near Washington | £33 | £251 |
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 - £17,448

Two storey extension - £87,922

Build a timber frame extension - £25,948

Build a swimming pool - £80,948

Single storey extension - £53,960

Side return extension - £40,915

Install an RSJ - £2,148

Outbuilding - £9,948

Build a Mansard loft conversion - £51,948

Loft conversion - £33,263

Build a kitchen extension - £41,948

Hip to gable loft conversion - £41,948

Granny annexe - £86,948

Garden office - £9,948

Convert a Garage - £15,948

Garage - £18,448

Build a flat roof extension - £21,948

Build a dormer loft conversion - £41,948

Concrete foundations - £6,198

Convert a bungalow loft - £28,948

Convert a basement - £36,915