From £17,220
We are a small Construction company which completes most types of works. In every project that we do we like to include either large or small desig...
From £18,100
Blueprint Construction & Development Ltd is a trusted extension builder serving customers in CF62 and the surrounding area. Contact us to today to ...
From £17,556
We only use fully qualified and skilled workers .
We offer value for money with full 12 month guarantee on all work carried out.
From £17,084
Relax... you have found a reliable extension builder in CF62. DPC BUILDERS is a friendly and reliable company based in CF62 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 £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 £17,564
40 years building and roofing experience.
20 years disabled facilities. Roofing general building, tiling,carpentry.
Val...
From £17,372
GRE BUILDING SERVICES is an established and experienced local extension builder in CF62. Please contact us for a free, no obligation quote and comp...
From £17,060
Member since June 2026
Trusted and professional extension builder in CF62. Experienced in all extension buildering work and keeping within budget and on quote. Elite Buil...
From £17,308
CJ BUILDING SERVICES are here to help customers who need an Extension Builder in CF62. We offer a competitive rate to complete all your extension b...

Underpinning ranges from £16,956 (Future Ideal Homes Ltd -Independent Network Installer based in CF63) to £18,100 (Blueprint Construction & Development Ltd based in CF62), 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 CF62 by posting a job with HaMuch and we will send it to extension builders in CF62.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Barry | £29 | £189 |
| Underpin A Building near Penarth | £31 | £189 |
| Underpin A Building near Vale of Glamorgan | £26 | £191 |
| Underpin A Building near Cardiff | £30 | £190 |
| Underpin A Building near Church Village | £30 | £188 |
| Underpin A Building near Caerphilly | £29 | £181 |
| Underpin A Building near Bridgend | £27 | £170 |
| Underpin A Building near Pontypridd | £29 | £184 |
| Underpin A Building near Rhondda | £27 | £183 |
| Underpin A Building near Weston-super-Mare | £29 | £216 |
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 - £17,337

Two storey extension - £87,755

Build a timber frame extension - £25,837

Build a swimming pool - £80,837

Single storey extension - £51,736

Side return extension - £39,664

Install an RSJ - £2,037

Outbuilding - £9,837

Build a Mansard loft conversion - £51,837

Loft conversion - £32,220

Build a kitchen extension - £41,837

Hip to gable loft conversion - £41,837

Granny annexe - £86,837

Garden office - £9,837

Convert a Garage - £15,837

Garage - £18,337

Build a flat roof extension - £21,837

Build a dormer loft conversion - £41,837

Concrete foundations - £6,087

Convert a bungalow loft - £28,837

Convert a basement - £35,664