From £17,164
QUAYSTONE BUILDING LTD are here to help customers who need an Extension Builder in Bolton. We offer a competitive rate to complete all your extensi...
From £17,364
We make immersive virtual experiences that transport people to real-life architecture projects in order to imagine the future.Architecture is portr...
From £17,188
WWS Garage Doors & Shutters is a trusted extension builder serving customers in Bolton and the surrounding area. Contact us to today to get a compe...
From £17,308
Bolton, BL1
Need an Extension Builder in Bolton? CB BUILDING & JOINERY LTD has been helping local clients (20 mile radius) with their extension buildering jobs...
From £17,188
Lostock Design & Build is an established and experienced local extension builder in Bolton. Please contact us for a free, no obligation quote and c...
From £17,612
Bolton, BL2
Come Home To Quality. First Rate Home Builders delivers quality construction in a professional manner. Servicing Bolton and the surrounding areas o...
From £17,540
Bolton, BL1
PETER BALDWIN BUILDERS is an established extension buildering business in Bolton. We come highly recommended and provide competitive quotes for you...
From £17,100
Bolton Builders is an established and experienced local extension builder in Bolton. Please contact us for a free, no obligation quote and competit...
From £17,172
Bolton, BL2
L D Debnam Building Services is an established and experienced local extension builder in Bolton. Please contact us for a free, no obligation quote...
From £17,268
Wallplas is an established extension buildering business in Bolton. 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 Bolton by posting a job with HaMuch and we will send it to extension builders in Bolton.
| 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 Little Hulton | £30 | £220 |
| Underpin A Building near Radcliffe | £30 | £220 |
| Underpin A Building near Westhoughton | £31 | £222 |
| Underpin A Building near Atherton | £31 | £223 |
| Underpin A Building near Horwich | £30 | £219 |
| Underpin A Building near Bury | £30 | £220 |
| Underpin A Building near Swinton | £32 | £235 |
| Underpin A Building near Whitefield | £31 | £229 |
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 - £17,290

Two storey extension - £87,686

Build a timber frame extension - £25,790

Build a swimming pool - £80,790

Single storey extension - £50,808

Side return extension - £39,142

Install an RSJ - £1,990

Outbuilding - £9,790

Build a Mansard loft conversion - £51,790

Loft conversion - £31,785

Build a kitchen extension - £41,790

Hip to gable loft conversion - £41,790

Granny annexe - £86,790

Garden office - £9,790

Convert a Garage - £15,790

Garage - £18,290

Build a flat roof extension - £21,790

Build a dormer loft conversion - £41,790

Concrete foundations - £6,040

Convert a bungalow loft - £28,790

Convert a basement - £35,142