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G Wager Building Maintenance is a trusted extension builder serving customers in Tonna and the surrounding area. Contact us to today to get a compe...
Relax... you have found a reliable extension builder in Tonna. Cwtch Property Developments is a friendly and reliable company based in Tonna who co...
Evans Home Improvements are here to help customers who need an Extension Builder in Tonna. We offer a competitive rate to complete all your extensi...
Trusted and professional extension builder in Tonna. Experienced in all extension buildering work and keeping within budget and on quote. Complete ...
Need an Extension Builder in Tonna? K.D.L Property Maintenance has been helping local clients (20 mile radius) with their extension buildering jobs...
Marin Hughes General Builders is a trusted extension builder serving customers in Tonna and the surrounding area. Contact us to today to get a comp...
SS BUILDER are here to help customers who need an Extension Builder in Tonna. We offer a competitive rate to complete all your extension buildering...
Tonna, SA11
Trusted and professional extension builder in Tonna. Experienced in all extension buildering work and keeping within budget and on quote. HALL & HA...
A Room at the Top are here to help customers who need an Extension Builder in Tonna. We offer a competitive rate to complete all your extension bui...
From £17,316
Dale Hopkins is an established and experienced local extension builder in Tonna. Please contact us for a free, no obligation quote and competitive ...

Underpinning ranges from £17,076 (Cwtch Property Developments based in CF34) to £17,476 (HALL & HARRIS CONSTRUCTION based in SA11), 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 Tonna by posting a job with HaMuch and we will send it to extension builders in Tonna.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Neath Port Talbot | £31 | £224 |
| Underpin A Building near Neath | £30 | £227 |
| Underpin A Building near Port Talbot | £31 | £227 |
| Underpin A Building near Maesteg | £38 | £283 |
| Underpin A Building near Swansea | £29 | £230 |
| Underpin A Building near Pyle | £34 | £262 |
| Underpin A Building near Gorseinon | £29 | £229 |
| Underpin A Building near Aberdare | £32 | £212 |
| Underpin A Building near Porthcawl | £33 | £252 |
| Underpin A Building near Bridgend | £32 | £200 |
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 - £17,324

Two storey extension - £87,736

Build a timber frame extension - £25,824

Build a swimming pool - £80,824

Single storey extension - £51,480

Side return extension - £39,520

Install an RSJ - £2,024

Outbuilding - £9,824

Build a Mansard loft conversion - £51,824

Loft conversion - £32,100

Build a kitchen extension - £41,824

Hip to gable loft conversion - £41,824

Granny annexe - £86,824

Garden office - £9,824

Convert a Garage - £15,824

Garage - £18,324

Build a flat roof extension - £21,824

Build a dormer loft conversion - £41,824

Concrete foundations - £6,074

Convert a bungalow loft - £28,824

Convert a basement - £35,520