From £17,356
Need an Extension Builder in Blackburn? Smart building solutions Blackburn ltd has been helping local clients (20 mile radius) with their extension...
From £17,220
Blackburn, BB1
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,212
Blackburn, BB1
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,428
M. Pickering Builder & Joiner is a trusted extension builder serving customers in Blackburn and the surrounding area. Contact us to today to get a ...
From £17,236
Need to find an Extension Builder near you for all your extension buildering work?
East Lancs Construction Ltd provides a local, trusted ex...
From £17,284
Need to find an Extension Builder near you for all your extension buildering work?
D Parker Design & Build provides a local, trusted extens...
From £17,316
BRYAN LEE BUILDING CONST LTD is an established and experienced local extension builder in Blackburn. Please contact us for a free, no obligation qu...
From £17,124
Blackburn, BB1
WM Brickwork & Pointing are here to help customers who need an Extension Builder in Blackburn. We offer a competitive rate to complete all your ext...
From £16,732
Blackburn, BB2
over 40 years experience in the trade my business has been established 45 years.
i am in the guild of master craftsmen and the lo...
From £17,436
Blackburn, BB1
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Underpinning ranges from £16,732 (COMPLETE BUILDING SERVICES based in BB2) to £17,436 (Garry Ryan Property Repairs based in BB1), 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 Blackburn by posting a job with HaMuch and we will send it to extension builders in Blackburn.
"Underpinning" - ACCRINGTON, job posted 04/06/25
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Blackburn | £34 | £247 |
| Underpin A Building near Darwen | £34 | £253 |
| Underpin A Building near Accrington | £33 | £245 |
| Underpin A Building near Bamber Bridge | £30 | £217 |
| Underpin A Building near Chorley | £31 | £222 |
| Underpin A Building near Rawtenstall | £31 | £230 |
| Underpin A Building near Preston | £30 | £219 |
| Underpin A Building near Leyland | £31 | £223 |
| Underpin A Building near Fulwood | £31 | £217 |
| Underpin A Building near Burnley | £29 | £219 |
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 - £17,234

Two storey extension - £87,602

Build a timber frame extension - £25,734

Build a swimming pool - £80,734

Single storey extension - £49,688

Side return extension - £38,512

Install an RSJ - £1,934

Outbuilding - £9,734

Build a Mansard loft conversion - £51,734

Loft conversion - £31,260

Build a kitchen extension - £41,734

Hip to gable loft conversion - £41,734

Granny annexe - £86,734

Garden office - £9,734

Convert a Garage - £15,734

Garage - £18,234

Build a flat roof extension - £21,734

Build a dormer loft conversion - £41,734

Concrete foundations - £5,984

Convert a bungalow loft - £28,734

Convert a basement - £34,512