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 £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 £17,116
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 £17,348
Need an Extension Builder in SA33? Graham & Co Home Improvement Specialists has been helping local clients (20 mile radius) with their extension bu...
From £17,124
D.A Fisher General Builders is an established and experienced local extension builder in SA33. Please contact us for a free, no obligation quote an...
From £17,292
Shane Griffiths & Son Ltd is a trusted extension builder serving customers in SA33 and the surrounding area. Contact us to today to get a competiti...
From £17,204
Experienced extension builder ready to quote for your work. WW BUILDERS is the best extension builder in SA33. No obligation free quotes and many ...
From £17,316
Glance Building Services is a trusted extension builder serving customers in SA33 and the surrounding area. Contact us to today to get a competitiv...
From £16,908
We are an NHBC approved builders and are a family run business
specialising in roofing , general building work and are qual...

Underpinning ranges from £16,908 (Tigerson Ltd based in SA16) 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 SA33 by posting a job with HaMuch and we will send it to extension builders in SA33.
| 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 Llanelli | £25 | £196 |
| Underpin A Building near Gorseinon | £25 | £196 |
| Underpin A Building near Pembrokeshire | £17 | £143 |
| Underpin A Building near Swansea | £25 | £197 |
| Underpin A Building near Milford Haven | £15 | £134 |
| Underpin A Building near Neath | £25 | £191 |
| Underpin A Building near Neath Port Talbot | £26 | £188 |
| Underpin A Building near Port Talbot | £26 | £188 |
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 - £17,206

Two storey extension - £87,558

Build a timber frame extension - £25,706

Build a swimming pool - £80,706

Single storey extension - £49,112

Side return extension - £38,188

Install an RSJ - £1,906

Outbuilding - £9,706

Build a Mansard loft conversion - £51,706

Loft conversion - £30,990

Build a kitchen extension - £41,706

Hip to gable loft conversion - £41,706

Granny annexe - £86,706

Garden office - £9,706

Convert a Garage - £15,706

Garage - £18,206

Build a flat roof extension - £21,706

Build a dormer loft conversion - £41,706

Concrete foundations - £5,956

Convert a bungalow loft - £28,706

Convert a basement - £34,188