Mathew Rees
Silicone Render System Ltd is a plastering company based in Porthcawl, with over 20 years’ experience in the plastering trade. W...
Experienced extension builder ready to quote for your work. WH Builders is the best extension builder in Porthcawl. No obligation free quotes and m...
From £17,300
Scorpion Windows LTD is a trusted extension builder serving customers in Porthcawl and the surrounding area. Contact us to today to get a competiti...
From £17,004
Need to find an Extension Builder near you for all your extension buildering work?
Price Builders provides a local, trusted extension build...

Underpinning ranges from £17,004 (Price Builders based in CF71) to £19,580 (Silicone Rendering Systems Ltd based in CF36), 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 Porthcawl by posting a job with HaMuch and we will send it to extension builders in Porthcawl.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Porthcawl | £33 | £252 |
| Underpin A Building near Pyle | £34 | £262 |
| Underpin A Building near Bridgend | £32 | £200 |
| Underpin A Building near Port Talbot | £31 | £227 |
| Underpin A Building near Maesteg | £38 | £283 |
| Underpin A Building near Vale of Glamorgan | £29 | £217 |
| Underpin A Building near Neath | £30 | £225 |
| Underpin A Building near Swansea | £29 | £229 |
| Underpin A Building near Neath Port Talbot | £31 | £224 |
| Underpin A Building near Rhondda | £31 | £206 |
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 - £17,804

Two storey extension - £88,456

Build a timber frame extension - £26,304

Build a swimming pool - £81,304

Single storey extension - £61,080

Side return extension - £44,920

Install an RSJ - £2,504

Outbuilding - £10,304

Build a Mansard loft conversion - £52,304

Loft conversion - £36,600

Build a kitchen extension - £42,304

Hip to gable loft conversion - £42,304

Granny annexe - £87,304

Garden office - £10,304

Convert a Garage - £16,304

Garage - £18,804

Build a flat roof extension - £22,304

Build a dormer loft conversion - £42,304

Concrete foundations - £6,554

Convert a bungalow loft - £29,304

Convert a basement - £40,920