From £16,932
Relax... you have found a reliable extension builder in SA37. Norton Construction is a friendly and reliable company based in SA37 who consider no ...
From £17,292
Shane Griffiths & Son Ltd is a trusted extension builder serving customers in SA37 and the surrounding area. Contact us to today to get a competiti...
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 £17,436
Need to find an Extension Builder near you for all your extension buildering work?
N Morgans & Son Ltd provides a local, trusted extension ...
From £17,236
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £16,820
Relax... you have found a reliable extension builder in SA37. D&O Construction Ltd is a friendly and reliable company based in SA37 who consider no...
From £17,116
Need to find an Extension Builder near you for all your extension buildering work?
Max Sandford & San provides a local, trusted extension b...
From £17,076
Need to find an Extension Builder near you for all your extension buildering work?
G.I Davies & Son provides a local, trusted extension bui...
From £17,212
Chartered construction manager with thirty five years in the construction industry. High standards of workmanship, customer focused. Honest, reliab...

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 SA37 by posting a job with HaMuch and we will send it to extension builders in SA37.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Carmarthenshire | £26 | £205 |
| Underpin A Building near Carmarthen | £26 | £205 |
| Underpin A Building near Pembrokeshire | £19 | £163 |
| Underpin A Building near Milford Haven | £18 | £159 |
| Underpin A Building near Llanelli | £29 | £231 |
| Underpin A Building near Gorseinon | £29 | £228 |
| Underpin A Building near Swansea | £29 | £229 |
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 - £17,102

Two storey extension - £87,403

Build a timber frame extension - £25,602

Build a swimming pool - £80,602

Single storey extension - £47,036

Side return extension - £37,020

Install an RSJ - £1,802

Outbuilding - £9,602

Build a Mansard loft conversion - £51,602

Loft conversion - £30,017

Build a kitchen extension - £41,602

Hip to gable loft conversion - £41,602

Granny annexe - £86,602

Garden office - £9,602

Convert a Garage - £15,602

Garage - £18,102

Build a flat roof extension - £21,602

Build a dormer loft conversion - £41,602

Concrete foundations - £5,852

Convert a bungalow loft - £28,602

Convert a basement - £33,020