From £16,908
We are an NHBC approved builders and are a family run business
specialising in roofing , general building work and are qual...
From £17,316
Glance Building Services is a trusted extension builder serving customers in Cefn Sidan and the surrounding area. Contact us to today to get a comp...
From £17,132
Need an Extension Builder in Cefn Sidan? Haven Commercial Contractors Ltd has been helping local clients (20 mile radius) with their extension buil...
From £17,204
Colin Cole - Total Renovations is an established and experienced local extension builder in Cefn Sidan. Please contact us for a free, no obligation...
From £17,204
Experienced extension builder ready to quote for your work. WW BUILDERS is the best extension builder in Cefn Sidan. No obligation free quotes and...
From £17,348
Need an Extension Builder in Cefn Sidan? Graham & Co Home Improvement Specialists has been helping local clients (20 mile radius) with their extens...
From £17,452
Llanelli Damp Proofing is an established and experienced local extension builder in Cefn Sidan. Please contact us for a free, no obligation quote a...
From £17,100
Experienced extension builder ready to quote for your work. HAYDN LEWIS BUILDING SVS LTD is the best extension builder in Cefn Sidan. No obligation...
From £18,524
Need an Extension Builder in Cefn Sidan? KD Construction has been helping local clients (20 mile radius) with their extension buildering jobs for m...
From £17,484
Trusted and professional extension builder in Cefn Sidan. Experienced in all extension buildering work and keeping within budget and on quote. Skyl...

Underpinning ranges from £16,908 (Tigerson Ltd based in SA16) 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 Cefn Sidan by posting a job with HaMuch and we will send it to extension builders in Cefn Sidan.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Llanelli | £25 | £196 |
| Underpin A Building near Gorseinon | £25 | £196 |
| Underpin A Building near Carmarthen | £24 | £191 |
| Underpin A Building near Carmarthenshire | £24 | £191 |
| Underpin A Building near Swansea | £25 | £197 |
| Underpin A Building near Neath | £25 | £191 |
| Underpin A Building near Port Talbot | £26 | £188 |
| Underpin A Building near Neath Port Talbot | £26 | £188 |
| Underpin A Building near Maesteg | £32 | £239 |
| Underpin A Building near Pyle | £30 | £234 |
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 - £17,367

Two storey extension - £87,801

Build a timber frame extension - £25,867

Build a swimming pool - £80,867

Single storey extension - £52,344

Side return extension - £40,006

Install an RSJ - £2,067

Outbuilding - £9,867

Build a Mansard loft conversion - £51,867

Loft conversion - £32,505

Build a kitchen extension - £41,867

Hip to gable loft conversion - £41,867

Granny annexe - £86,867

Garden office - £9,867

Convert a Garage - £15,867

Garage - £18,367

Build a flat roof extension - £21,867

Build a dormer loft conversion - £41,867

Concrete foundations - £6,117

Convert a bungalow loft - £28,867

Convert a basement - £36,006