From £17,580
Astley Bridge Building Services have been established since 1999 and offer quality building services to the public who are looking for a personal s...
From £17,100
Bolton Builders is an established and experienced local extension builder in BL7. Please contact us for a free, no obligation quote and competitive...
From £17,612
Come Home To Quality. First Rate Home Builders delivers quality construction in a professional manner. Servicing Bolton and the surrounding areas o...
From £17,164
QUAYSTONE BUILDING LTD are here to help customers who need an Extension Builder in BL7. We offer a competitive rate to complete all your extension ...
From £17,308
Need an Extension Builder in BL7? CB BUILDING & JOINERY LTD has been helping local clients (20 mile radius) with their extension buildering jobs fo...
From £17,540
PETER BALDWIN BUILDERS is an established extension buildering business in BL7. We come highly recommended and provide competitive quotes for your w...
From £17,260
IK MASTER BUILD LTD is an established and experienced local extension builder in BL7. Please contact us for a free, no obligation quote and competi...
From £17,396
Need to find an Extension Builder near you for all your extension buildering work?
J & C Barker (Builders) Limited provides a local, truste...
From £17,132
Fishers Building & Paving Ltd is an established extension buildering business in BL7. We come highly recommended and provide competitive quotes for...
From £17,268
Wallplas is an established extension buildering business in BL7. We come highly recommended and provide competitive quotes for your work.

Underpinning ranges from £17,100 (Bolton Builders based in BL2) to £17,612 (First Rate Home Builders based in BL2), 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 BL7 by posting a job with HaMuch and we will send it to extension builders in BL7.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Bolton | £27 | £193 |
| Underpin A Building near Darwen | £30 | £223 |
| Underpin A Building near Horwich | £27 | £192 |
| Underpin A Building near Bury | £26 | £192 |
| Underpin A Building near Farnworth | £27 | £194 |
| Underpin A Building near Radcliffe | £26 | £194 |
| Underpin A Building near Westhoughton | £27 | £194 |
| Underpin A Building near Little Hulton | £27 | £196 |
| Underpin A Building near Rawtenstall | £26 | £193 |
| Underpin A Building near Atherton | £27 | £194 |
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 - £17,336

Two storey extension - £87,754

Build a timber frame extension - £25,836

Build a swimming pool - £80,836

Single storey extension - £51,720

Side return extension - £39,655

Install an RSJ - £2,036

Outbuilding - £9,836

Build a Mansard loft conversion - £51,836

Loft conversion - £32,213

Build a kitchen extension - £41,836

Hip to gable loft conversion - £41,836

Granny annexe - £86,836

Garden office - £9,836

Convert a Garage - £15,836

Garage - £18,336

Build a flat roof extension - £21,836

Build a dormer loft conversion - £41,836

Concrete foundations - £6,086

Convert a bungalow loft - £28,836

Convert a basement - £35,655