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Select your affordable CF46 extension builder
Barlam Drylining Ltd are here to help customers who need an Extension Builder in CF46. We offer a competitive rate to complete all your extension b...
Gareth Thorpe
G T Brickwork is an established extension buildering business in CF46. We come highly recommended and provide competitive quotes for your work.
...Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,348
Atlantic Building Services Ltd is an established extension buildering business in CF46. We come highly recommended and provide competitive quotes f...
From £17,300
Need an Extension Builder in CF46? MG3Design has been helping local clients (20 mile radius) with their extension buildering jobs for many years. G...

Underpinning ranges from £17,204 (BUILD-TEC CONTRACTORS LTD based in CF45) to £17,396 (Barlam Drylining Ltd based in CF45), 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 CF46 by posting a job with HaMuch and we will send it to extension builders in CF46.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Pontypridd | £33 | £211 |
| Underpin A Building near Rhondda, Cynon, Taff | £31 | £209 |
| Underpin A Building near Rhondda | £31 | £206 |
| Underpin A Building near Merthyr Tydfil | £33 | £220 |
| Underpin A Building near Church Village | £34 | £214 |
| Underpin A Building near Caerphilly | £33 | £208 |
| Underpin A Building near Tredegar | £30 | £217 |
| Underpin A Building near Aberdare | £32 | £212 |
| Underpin A Building near Risca | £32 | £218 |
| 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 - £17,313

Two storey extension - £87,719

Build a timber frame extension - £25,813

Build a swimming pool - £80,813

Single storey extension - £51,256

Side return extension - £39,394

Install an RSJ - £2,013

Outbuilding - £9,813

Build a Mansard loft conversion - £51,813

Loft conversion - £31,995

Build a kitchen extension - £41,813

Hip to gable loft conversion - £41,813

Granny annexe - £86,813

Garden office - £9,813

Convert a Garage - £15,813

Garage - £18,313

Build a flat roof extension - £21,813

Build a dormer loft conversion - £41,813

Concrete foundations - £6,063

Convert a bungalow loft - £28,813

Convert a basement - £35,394