From £17,052
Need an Extension Builder in SA8? Calon Construction Ltd has been helping local clients (20 mile radius) with their extension buildering jobs for m...
From £17,260
Marin Hughes General Builders is a trusted extension builder serving customers in SA8 and the surrounding area. Contact us to today to get a compet...
From £17,324
Evans Home Improvements are here to help customers who need an Extension Builder in SA8. We offer a competitive rate to complete all your extension...
From £17,316
Dale Hopkins is an established and experienced local extension builder in SA8. Please contact us for a free, no obligation quote and competitive ra...
From £17,436
A Room at the Top are here to help customers who need an Extension Builder in SA8. We offer a competitive rate to complete all your extension build...
From £17,508
Experienced extension builder ready to quote for your work. D J Howells is the best extension builder in SA8. No obligation free quotes and many ha...
From £17,476
Trusted and professional extension builder in SA8. Experienced in all extension buildering work and keeping within budget and on quote. HALL & HARR...
From £17,132
Karina Lane Construction Ltd are here to help customers who need an Extension Builder in SA8. We offer a competitive rate to complete all your exte...
From £17,468
S H PHILLIPS BUILDING CONTRACT are here to help customers who need an Extension Builder in SA8. We offer a competitive rate to complete all your ex...
From £17,324
Experienced extension builder ready to quote for your work. CR BUILDING & MAINTENANCE SERV is the best extension builder in SA8. No obligation free...

Underpinning ranges from £17,052 (Calon Construction Ltd based in SA7) to £17,508 (D J Howells based in SA18), 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 SA8 by posting a job with HaMuch and we will send it to extension builders in SA8.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Neath | £30 | £225 |
| Underpin A Building near Neath Port Talbot | £31 | £224 |
| Underpin A Building near Swansea | £29 | £229 |
| Underpin A Building near Port Talbot | £31 | £227 |
| Underpin A Building near Gorseinon | £29 | £228 |
| Underpin A Building near Maesteg | £38 | £283 |
| Underpin A Building near Llanelli | £29 | £231 |
| Underpin A Building near Pyle | £34 | £262 |
| Underpin A Building near Aberdare | £32 | £212 |
| Underpin A Building near Porthcawl | £33 | £252 |
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 - £17,330

Two storey extension - £87,744

Build a timber frame extension - £25,830

Build a swimming pool - £80,830

Single storey extension - £51,592

Side return extension - £39,583

Install an RSJ - £2,030

Outbuilding - £9,830

Build a Mansard loft conversion - £51,830

Loft conversion - £32,153

Build a kitchen extension - £41,830

Hip to gable loft conversion - £41,830

Granny annexe - £86,830

Garden office - £9,830

Convert a Garage - £15,830

Garage - £18,330

Build a flat roof extension - £21,830

Build a dormer loft conversion - £41,830

Concrete foundations - £6,080

Convert a bungalow loft - £28,830

Convert a basement - £35,583