From £17,396
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,324
Experienced extension builder ready to quote for your work. AW Building Projects North East Ltd is the best extension builder in TS21. No obligatio...
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...
From £17,244
Trusted and professional extension builder in TS21. Experienced in all extension buildering work and keeping within budget and on quote. Empire Bui...
From £17,436
Design Consultancy & Construction Services Ltd are here to help customers who need an Extension Builder in TS21. We offer a competitive rate to com...
From £17,708
Experienced extension builder ready to quote for your work. pidesigns is the best extension builder in TS21. No obligation free quotes and many hap...
From £17,260
Trusted and professional extension builder in TS21. Experienced in all extension buildering work and keeping within budget and on quote. D & G Buil...
From £17,380
Relax... you have found a reliable extension builder in TS21. Under Pressure is a friendly and reliable company based in TS21 who consider no job a...
From £17,316
Need an Extension Builder in TS21? CHERRYBURN CONSTRUCTION LTD has been helping local clients (20 mile radius) with their extension buildering jobs...

Underpinning ranges from £17,244 (Empire Building Contracts based in TS18) 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 TS21 by posting a job with HaMuch and we will send it to extension builders in TS21.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Stockton-on-Tees | £41 | £228 |
| Underpin A Building near Billingham | £44 | £242 |
| Underpin A Building near Newton Aycliffe | £39 | £227 |
| Underpin A Building near Thornaby-on-Tees | £42 | £231 |
| Underpin A Building near Middlesbrough | £43 | £236 |
| Underpin A Building near Ingleby Barwick | £41 | £228 |
| Underpin A Building near Spennymoor | £38 | £248 |
| Underpin A Building near Darlington | £60 | £222 |
| Underpin A Building near Hartlepool | £40 | £236 |
| Underpin A Building near Peterlee | £36 | £230 |
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 - £17,418

Two storey extension - £87,876

Build a timber frame extension - £25,918

Build a swimming pool - £80,918

Single storey extension - £53,352

Side return extension - £40,573

Install an RSJ - £2,118

Outbuilding - £9,918

Build a Mansard loft conversion - £51,918

Loft conversion - £32,978

Build a kitchen extension - £41,918

Hip to gable loft conversion - £41,918

Granny annexe - £86,918

Garden office - £9,918

Convert a Garage - £15,918

Garage - £18,418

Build a flat roof extension - £21,918

Build a dormer loft conversion - £41,918

Concrete foundations - £6,168

Convert a bungalow loft - £28,918

Convert a basement - £36,573