From £17,508
Ethos Property Developments Limited is an established extension buildering business in BL1. We come highly recommended and provide competitive quot...
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 £17,276
Relax... you have found a reliable extension builder in BL1. David Anderson Builders is a friendly and reliable company based in BL1 who consider n...
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 £17,348
Trusted and professional extension builder in BL1. Experienced in all extension buildering work and keeping within budget and on quote. We Build ha...
From £17,108
Need an Extension Builder in BL1? 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 BL1. Experienced in all extension buildering work and keeping within budget and on quote. Fit-on Gara...

Underpinning ranges from £16,460 (Aquatec Builder based in OL10) to £17,508 (Ethos Property Developments Limited based in SK15), 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 BL1 by posting a job with HaMuch and we will send it to extension builders in BL1.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Bolton | £31 | £219 |
| Underpin A Building near Farnworth | £30 | £219 |
| Underpin A Building near Horwich | £30 | £219 |
| Underpin A Building near Westhoughton | £31 | £222 |
| Underpin A Building near Little Hulton | £30 | £220 |
| Underpin A Building near Atherton | £31 | £223 |
| Underpin A Building near Radcliffe | £30 | £220 |
| Underpin A Building near Bury | £30 | £219 |
| Underpin A Building near Hindley | £30 | £219 |
| Underpin A Building near Swinton | £32 | £234 |
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 - £17,142

Two storey extension - £87,464

Build a timber frame extension - £25,642

Build a swimming pool - £80,642

Single storey extension - £47,848

Side return extension - £37,477

Install an RSJ - £1,842

Outbuilding - £9,642

Build a Mansard loft conversion - £51,642

Loft conversion - £30,398

Build a kitchen extension - £41,642

Hip to gable loft conversion - £41,642

Granny annexe - £86,642

Garden office - £9,642

Convert a Garage - £15,642

Garage - £18,142

Build a flat roof extension - £21,642

Build a dormer loft conversion - £41,642

Concrete foundations - £5,892

Convert a bungalow loft - £28,642

Convert a basement - £33,477