From £17,236
The Rod Squad is a trusted extension builder serving customers in Tonna and the surrounding area. Contact us to today to get a competitive quote fo...
From £17,276
KAW Developments is a trusted extension builder serving customers in Tonna and the surrounding area. Contact us to today to get a competitive quote...
From £17,244
Local builder services CENTER "I, YOU, WE" CIC. Exterior building work build or repair a path or driveway construct or restore an ...
From £17,500
Experienced extension builder ready to quote for your work. Improve Not Move is the best extension builder in Tonna. No obligation free quotes and ...
From £17,132
Karina Lane Construction Ltd are here to help customers who need an Extension Builder in Tonna. We offer a competitive rate to complete all your ex...
From £17,076
Homekare Building Services Ltd is an established and experienced local extension builder in Tonna. Please contact us for a free, no obligation quot...
From £17,516
Relax... you have found a reliable extension builder in Tonna. Signature Project Solutions Ltd is a friendly and reliable company based in Tonna wh...
From £17,212
Trusted and professional extension builder in Tonna. Experienced in all extension buildering work and keeping within budget and on quote. Masterbui...
From £17,436
24/7 EMERGANCY CALLOUT FOR BLOCKED DRAINS NO CALLOUT FEE
We are a family run business of over 30 years experience in the Swansea and sur...
From £18,524
Need an Extension Builder in Tonna? KD Construction has been helping local clients (20 mile radius) with their extension buildering jobs for many y...

Underpinning ranges from £17,076 (Homekare Building Services Ltd based in SA5) to £18,524 (KD Construction based in SA15), 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 | £225 |
| 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 | £228 |
| 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 - £17,415

Two storey extension - £87,873

Build a timber frame extension - £25,915

Build a swimming pool - £80,915

Single storey extension - £53,304

Side return extension - £40,546

Install an RSJ - £2,115

Outbuilding - £9,915

Build a Mansard loft conversion - £51,915

Loft conversion - £32,955

Build a kitchen extension - £41,915

Hip to gable loft conversion - £41,915

Granny annexe - £86,915

Garden office - £9,915

Convert a Garage - £15,915

Garage - £18,415

Build a flat roof extension - £21,915

Build a dormer loft conversion - £41,915

Concrete foundations - £6,165

Convert a bungalow loft - £28,915

Convert a basement - £36,546