From £17,132
AAA BUILDERS are here to help customers who need an Extension Builder in BB11. We offer a competitive rate to complete all your extension builderin...
From £17,540
Need to find an Extension Builder near you for all your extension buildering work?
RB Building Services provides a local, trusted extension...
From £16,460
Member since November 2019
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,156
Hello So we do not work and almost any work and it works very well and qualitatively If you are interested we can work in the future
From £17,292
Need to find an Extension Builder near you for all your extension buildering work?
DC Contractors provides a local, trusted extension build...
From £17,460
Need to find an Extension Builder near you for all your extension buildering work?
ESBP Specialists Ltd provides a local, trusted extension...
From £17,108
Need an Extension Builder in BB11? MK Builders has been helping local clients (20 mile radius) with their extension buildering jobs for many years....
From £17,132
Trusted and professional extension builder in BB11. Experienced in all extension buildering work and keeping within budget and on quote. Fit-on Gar...
From £17,548
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Underpinning ranges from £16,460 (Aquatec Builder based in OL10) to £17,548 (Northern Garage Conversion based in OL9), 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 BB11 by posting a job with HaMuch and we will send it to extension builders in BB11.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Burnley | £29 | £219 |
| Underpin A Building near Nelson | £27 | £214 |
| Underpin A Building near Accrington | £33 | £243 |
| Underpin A Building near Rawtenstall | £29 | £213 |
| Underpin A Building near Blackburn | £33 | £246 |
| Underpin A Building near Darwen | £34 | £253 |
| Underpin A Building near Calderdale | £33 | £253 |
| Underpin A Building near Rochdale | £30 | £221 |
| Underpin A Building near Bury | £30 | £219 |
| Underpin A Building near Heywood | £30 | £221 |
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 - £17,151

Two storey extension - £87,477

Build a timber frame extension - £25,651

Build a swimming pool - £80,651

Single storey extension - £48,024

Side return extension - £37,576

Install an RSJ - £1,851

Outbuilding - £9,651

Build a Mansard loft conversion - £51,651

Loft conversion - £30,480

Build a kitchen extension - £41,651

Hip to gable loft conversion - £41,651

Granny annexe - £86,651

Garden office - £9,651

Convert a Garage - £15,651

Garage - £18,151

Build a flat roof extension - £21,651

Build a dormer loft conversion - £41,651

Concrete foundations - £5,901

Convert a bungalow loft - £28,651

Convert a basement - £33,576