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Select your affordable DL7 extension builder
S & K Windows are here to help customers who need an Extension Builder in DL7. We offer a competitive rate to complete all your extension builderin...
From £17,372
Darren Collin
Hi I'm darren
I'm a fully qualified time served joiner I have been doing it for 30 years and have been self employed for 12 years ...

Underpinning ranges from £17,220 (S & K Windows based in DL6) to £17,372 (Darren Collin Joinery based in DL7), 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 DL7 by posting a job with HaMuch and we will send it to extension builders in DL7.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Darlington | £60 | £222 |
| Underpin A Building near Ingleby Barwick | £41 | £228 |
| Underpin A Building near Thornaby-on-Tees | £42 | £231 |
| Underpin A Building near Stockton-on-Tees | £41 | £228 |
| Underpin A Building near Middlesbrough | £43 | £236 |
| Underpin A Building near Newton Aycliffe | £38 | £225 |
| Underpin A Building near Billingham | £44 | £242 |
| Underpin A Building near Eston | £42 | £241 |
| Underpin A Building near Bishop Auckland | £38 | £248 |
| Underpin A Building near Harrogate | £29 | £225 |
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 - £17,296

Two storey extension - £87,694

Build a timber frame extension - £25,796

Build a swimming pool - £80,796

Single storey extension - £50,920

Side return extension - £39,205

Install an RSJ - £1,996

Outbuilding - £9,796

Build a Mansard loft conversion - £51,796

Loft conversion - £31,838

Build a kitchen extension - £41,796

Hip to gable loft conversion - £41,796

Granny annexe - £86,796

Garden office - £9,796

Convert a Garage - £15,796

Garage - £18,296

Build a flat roof extension - £21,796

Build a dormer loft conversion - £41,796

Concrete foundations - £6,046

Convert a bungalow loft - £28,796

Convert a basement - £35,205