Experienced extension builder ready to quote for your work. JA Building Maintenance is the best extension builder in CF64. No obligation free quote...
Bill Coslett
35 years in the trade and there is not much we haven't come across or done from pools to extensions and we specialise in loft conversions
Relax... you have found a reliable extension builder in CF64. DPC BUILDERS is a friendly and reliable company based in CF64 who consider no job as ...
From £17,148
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,308
CJ BUILDING SERVICES are here to help customers who need an Extension Builder in CF64. We offer a competitive rate to complete all your extension b...
From £17,196
Experienced extension builder ready to quote for your work. Studio369 is the best extension builder in CF64. No obligation free quotes and many hap...
From £16,956
Need to find an Extension Builder near you for all your extension buildering work?
Future Ideal Homes Ltd -Independent Network Installer pr...
From £17,532
, CF24
Need to find an Extension Builder near you for all your extension buildering work?
Heath Windows & Doors Ltd provides a local, trusted exte...

Underpinning ranges from £16,700 (Penarth Loft Conversions Ltd based in CF64) to £17,532 (Heath Windows & Doors Ltd based in CF24), 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 CF64 by posting a job with HaMuch and we will send it to extension builders in CF64.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Penarth | £35 | £219 |
| Underpin A Building near Cardiff | £34 | £219 |
| Underpin A Building near Barry | £33 | £223 |
| Underpin A Building near Caerphilly | £33 | £208 |
| Underpin A Building near Church Village | £34 | £214 |
| Underpin A Building near Weston-super-Mare | £33 | £253 |
| Underpin A Building near Vale of Glamorgan | £29 | £217 |
| Underpin A Building near Risca | £32 | £218 |
| Underpin A Building near Pontypridd | £33 | £211 |
| Underpin A Building near Newport | £41 | £233 |
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 - £17,130

Two storey extension - £87,445

Build a timber frame extension - £25,630

Build a swimming pool - £80,630

Single storey extension - £47,600

Side return extension - £37,338

Install an RSJ - £1,830

Outbuilding - £9,630

Build a Mansard loft conversion - £51,630

Loft conversion - £30,281

Build a kitchen extension - £41,630

Hip to gable loft conversion - £41,630

Granny annexe - £86,630

Garden office - £9,630

Convert a Garage - £15,630

Garage - £18,130

Build a flat roof extension - £21,630

Build a dormer loft conversion - £41,630

Concrete foundations - £5,880

Convert a bungalow loft - £28,630

Convert a basement - £33,338