Member since October 2026
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Barlam Drylining Ltd are here to help customers who need an Extension Builder in CF82. We offer a competitive rate to complete all your extension b...
Need an Extension Builder in CF82? P.D.Builders has been helping local clients (20 mile radius) with their extension buildering jobs for many years...
Very reliable honest and hard working guarantee all work clean and tidy first class work
Experienced extension builder ready to quote for your work. JA Building Maintenance is the best extension builder in CF82. No obligation free quote...
Experienced extension builder ready to quote for your work. TOR BUILD is the best extension builder in CF82. No obligation free quotes and many hap...
T Porter Buiding is an established and experienced local extension builder in CF82. Please contact us for a free, no obligation quote and competiti...
Relax... you have found a reliable extension builder in CF82. Charles Marshall Contracting Ltd is a friendly and reliable company based in CF82 who...
Sharif General Builder is an established and experienced local extension builder in CF82. Please contact us for a free, no obligation quote and com...
Experienced extension builder ready to quote for your work. Limitlesskitchens is the best extension builder in CF82. No obligation free quotes and ...

Underpinning ranges from £16,700 (A.Gaddarn Builders based in NP11) to £17,740 (L.Jones Building 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 CF82 by posting a job with HaMuch and we will send it to extension builders in CF82.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Caerphilly | £33 | £208 |
| Underpin A Building near Pontypridd | £33 | £211 |
| Underpin A Building near Risca | £32 | £218 |
| Underpin A Building near Church Village | £34 | £214 |
| Underpin A Building near Rhondda, Cynon, Taff | £31 | £209 |
| Underpin A Building near Tredegar | £30 | £217 |
| Underpin A Building near Rhondda | £31 | £206 |
| Underpin A Building near Cwmbran | £43 | £219 |
| Underpin A Building near Merthyr Tydfil | £33 | £220 |
| Underpin A Building near Ebbw Vale | £30 | £217 |
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 - £17,252

Two storey extension - £87,628

Build a timber frame extension - £25,752

Build a swimming pool - £80,752

Single storey extension - £50,040

Side return extension - £38,710

Install an RSJ - £1,952

Outbuilding - £9,752

Build a Mansard loft conversion - £51,752

Loft conversion - £31,425

Build a kitchen extension - £41,752

Hip to gable loft conversion - £41,752

Granny annexe - £86,752

Garden office - £9,752

Convert a Garage - £15,752

Garage - £18,252

Build a flat roof extension - £21,752

Build a dormer loft conversion - £41,752

Concrete foundations - £6,002

Convert a bungalow loft - £28,752

Convert a basement - £34,710