Barlam Drylining Ltd are here to help customers who need an Extension Builder in Merthyr Tydfil. We offer a competitive rate to complete all your e...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,028
Need an Extension Builder in Merthyr Tydfil? A POWELL CONSTRUCTION LTD has been helping local clients (20 mile radius) with their extension builder...
From £17,308
Dare Fitness is an established extension buildering business in Merthyr Tydfil. We come highly recommended and provide competitive quotes for your ...
From £17,076
L E JONES BUILDER is an established extension buildering business in Merthyr Tydfil. We come highly recommended and provide competitive quotes for ...

Underpinning ranges from £17,028 (A POWELL CONSTRUCTION LTD based in CF44) 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 Merthyr Tydfil by posting a job with HaMuch and we will send it to extension builders in Merthyr Tydfil.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Merthyr Tydfil | £33 | £220 |
| Underpin A Building near Aberdare | £32 | £212 |
| Underpin A Building near Tredegar | £30 | £217 |
| Underpin A Building near Rhondda, Cynon, Taff | £31 | £209 |
| Underpin A Building near Ebbw Vale | £30 | £217 |
| Underpin A Building near Rhondda | £31 | £206 |
| Underpin A Building near Pontypridd | £33 | £211 |
| Underpin A Building near Church Village | £34 | £214 |
| Underpin A Building near Caerphilly | £33 | £208 |
| 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 - £17,202

Two storey extension - £87,554

Build a timber frame extension - £25,702

Build a swimming pool - £80,702

Single storey extension - £49,048

Side return extension - £38,152

Install an RSJ - £1,902

Outbuilding - £9,702

Build a Mansard loft conversion - £51,702

Loft conversion - £30,960

Build a kitchen extension - £41,702

Hip to gable loft conversion - £41,702

Granny annexe - £86,702

Garden office - £9,702

Convert a Garage - £15,702

Garage - £18,202

Build a flat roof extension - £21,702

Build a dormer loft conversion - £41,702

Concrete foundations - £5,952

Convert a bungalow loft - £28,702

Convert a basement - £34,152