From £17,140
DEREK REES BUILDING MAINTENANC is an established extension buildering business in Builth Wells. We come highly recommended and provide competitive ...
From £17,084
Need to find an Extension Builder near you for all your extension buildering work?
Cherry Build Limited provides a local, trusted extension...
From £17,284
ST Building is a team of reliable and experienced contractors in mid- wales and Herefordshire with 20 years in the trade.We achieve hig...
From £17,212
K M Lewis T/A Summergill Developments is an established extension buildering business in Builth Wells. We come highly recommended and provide compe...
From £17,244
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Underpinning ranges from £17,084 (Cherry Build Limited based in LD1) to £17,284 (ST Building based in LD8), 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 Builth Wells by posting a job with HaMuch and we will send it to extension builders in Builth Wells.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Ebbw Vale | £30 | £217 |
| Underpin A Building near Tredegar | £30 | £217 |
| Underpin A Building near Merthyr Tydfil | £33 | £220 |
| Underpin A Building near Aberdare | £32 | £212 |
| Underpin A Building near Pontypool | £30 | £210 |
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 - £17,193

Two storey extension - £87,539

Build a timber frame extension - £25,693

Build a swimming pool - £80,693

Single storey extension - £48,856

Side return extension - £38,044

Install an RSJ - £1,893

Outbuilding - £9,693

Build a Mansard loft conversion - £51,693

Loft conversion - £30,870

Build a kitchen extension - £41,693

Hip to gable loft conversion - £41,693

Granny annexe - £86,693

Garden office - £9,693

Convert a Garage - £15,693

Garage - £18,193

Build a flat roof extension - £21,693

Build a dormer loft conversion - £41,693

Concrete foundations - £5,943

Convert a bungalow loft - £28,693

Convert a basement - £34,044