From £16,932
Relax... you have found a reliable extension builder in SA43. Norton Construction is a friendly and reliable company based in SA43 who consider no ...
From £16,796
Hi my name is Deri
I'm a friendly and reliable and have over 20 yes experience in the building trade. And also come from a family backgr...
From £17,292
Shane Griffiths & Son Ltd is a trusted extension builder serving customers in SA43 and the surrounding area. Contact us to today to get a competiti...
From £17,436
Need to find an Extension Builder near you for all your extension buildering work?
N Morgans & Son Ltd provides a local, trusted extension ...
From £16,820
Relax... you have found a reliable extension builder in SA43. D&O Construction Ltd is a friendly and reliable company based in SA43 who consider no...
From £17,236
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Underpinning ranges from £16,796 (DERI BROWN T/A D Brown Building Services based in SA44) to £17,436 (N Morgans & Son Ltd based in SA33), 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 SA43 by posting a job with HaMuch and we will send it to extension builders in SA43.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Carmarthenshire | £24 | £191 |
| Underpin A Building near Carmarthen | £24 | £191 |
| Underpin A Building near Milford Haven | £15 | £134 |
| Underpin A Building near Pembrokeshire | £17 | £143 |
| Underpin A Building near Llanelli | £25 | £196 |
| Underpin A Building near Gorseinon | £25 | £196 |
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 - £17,085

Two storey extension - £87,378

Build a timber frame extension - £25,585

Build a swimming pool - £80,585

Single storey extension - £46,707

Side return extension - £36,835

Install an RSJ - £1,785

Outbuilding - £9,585

Build a Mansard loft conversion - £51,585

Loft conversion - £29,863

Build a kitchen extension - £41,585

Hip to gable loft conversion - £41,585

Granny annexe - £86,585

Garden office - £9,585

Convert a Garage - £15,585

Garage - £18,085

Build a flat roof extension - £21,585

Build a dormer loft conversion - £41,585

Concrete foundations - £5,835

Convert a bungalow loft - £28,585

Convert a basement - £32,835