From £16,996
Trusted and professional extension builder in Cymmer. Experienced in all extension buildering work and keeping within budget and on quote. RJ CONST...
From £17,116
Excel Home Design Ltd is an established extension buildering business in Cymmer. We come highly recommended and provide competitive quotes for your...
From £17,292
We are a small family run business, established over 35 years ago, specialising in Hard Landscaping (Patios) and Block Paving.We a...
From £17,052
P ALLEN BUILDERS is an established and experienced local extension builder in Cymmer. Please contact us for a free, no obligation quote and competi...
From £17,076
L E JONES BUILDER is an established extension buildering business in Cymmer. We come highly recommended and provide competitive quotes for your wor...
From £17,204
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,116
EXTEND & BUILD LTD is an established and experienced local extension builder in Cymmer. Please contact us for a free, no obligation quote and compe...
From £17,220
Relax... you have found a reliable extension builder in Cymmer. WESTGATE BUILDING SERVICES LTD is a friendly and reliable company based in Cymmer w...
From £17,028
Need an Extension Builder in Cymmer? A POWELL CONSTRUCTION LTD has been helping local clients (20 mile radius) with their extension buildering jobs...
From £17,396
Barlam Drylining Ltd are here to help customers who need an Extension Builder in Cymmer. We offer a competitive rate to complete all your extension...

Underpinning ranges from £16,996 (RJ CONSTRUCTION based in CF40) 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 Cymmer by posting a job with HaMuch and we will send it to extension builders in Cymmer.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Rhondda | £31 | £206 |
| Underpin A Building near Rhondda, Cynon, Taff | £31 | £209 |
| Underpin A Building near Pontypridd | £33 | £211 |
| Underpin A Building near Church Village | £34 | £214 |
| Underpin A Building near Aberdare | £32 | £212 |
| Underpin A Building near Caerphilly | £33 | £208 |
| Underpin A Building near Bridgend | £32 | £200 |
| Underpin A Building near Maesteg | £38 | £283 |
| Underpin A Building near Merthyr Tydfil | £33 | £220 |
| Underpin A Building near Pyle | £34 | £262 |
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 - £17,150

Two storey extension - £87,474

Build a timber frame extension - £25,650

Build a swimming pool - £80,650

Single storey extension - £47,992

Side return extension - £37,558

Install an RSJ - £1,850

Outbuilding - £9,650

Build a Mansard loft conversion - £51,650

Loft conversion - £30,465

Build a kitchen extension - £41,650

Hip to gable loft conversion - £41,650

Granny annexe - £86,650

Garden office - £9,650

Convert a Garage - £15,650

Garage - £18,150

Build a flat roof extension - £21,650

Build a dormer loft conversion - £41,650

Concrete foundations - £5,900

Convert a bungalow loft - £28,650

Convert a basement - £33,558