From £25,704
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £25,824
Need an Extension Builder in Mountain Ash? FORMWORK CONSTRUCTION LTD has been helping local clients (20 mile radius) with their extension builderin...
From £25,896
Barlam Drylining Ltd are here to help customers who need an Extension Builder in Mountain Ash. We offer a competitive rate to complete all your ext...
From £25,848
Relax... you have found a reliable extension builder in Mountain Ash. Professional Concrete Solutions is a friendly and reliable company based in M...
From £25,528
Need an Extension Builder in Mountain Ash? A POWELL CONSTRUCTION LTD has been helping local clients (20 mile radius) with their extension builderin...
From £25,576
L E JONES BUILDER is an established extension buildering business in Mountain Ash. We come highly recommended and provide competitive quotes for yo...
From £25,496
Trusted and professional extension builder in Mountain Ash. Experienced in all extension buildering work and keeping within budget and on quote. RJ...
From £25,808
Dare Fitness is an established extension buildering business in Mountain Ash. We come highly recommended and provide competitive quotes for your wo...
From £25,800
Need an Extension Builder in Mountain Ash? MG3Design has been helping local clients (20 mile radius) with their extension buildering jobs for many ...
From £25,552
P ALLEN BUILDERS is an established and experienced local extension builder in Mountain Ash. Please contact us for a free, no obligation quote and c...

A timber frame extension built in Mountain Ash typically ranges from £25,496 (RJ CONSTRUCTION based in CF40) to £25,896 (Barlam Drylining Ltd based in CF45), but this will vary depending on the size of your extension, the design features you'd like and what your soil is like for the foundations.
Comparing extension builders estimates for building a timber frame extension gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build a timber frame extension in Mountain Ash by posting a job with HaMuch and we'll send it to extension builders in Mountain Ash.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Timber Frame Extension near Rhondda, Cynon, Taff | £27 | £183 |
| Build A Timber Frame Extension near Rhondda | £27 | £183 |
| Build A Timber Frame Extension near Pontypridd | £29 | £184 |
| Build A Timber Frame Extension near Aberdare | £28 | £186 |
| Build A Timber Frame Extension near Merthyr Tydfil | £28 | £187 |
| Build A Timber Frame Extension near Church Village | £30 | £188 |
| Build A Timber Frame Extension near Tredegar | £24 | £195 |
| Build A Timber Frame Extension near Caerphilly | £29 | £181 |
| Build A Timber Frame Extension near Ebbw Vale | £24 | £195 |
| Build A Timber Frame Extension near Risca | £27 | £185 |
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 - £17,203

Two storey extension - £87,555

Build a timber frame extension - £25,703

Build a swimming pool - £80,703

Single storey extension - £49,064

Side return extension - £38,161

Install an RSJ - £1,903

Outbuilding - £9,703

Build a Mansard loft conversion - £51,703

Loft conversion - £30,968

Build a kitchen extension - £41,703

Hip to gable loft conversion - £41,703

Granny annexe - £86,703

Garden office - £9,703

Convert a Garage - £15,703

Garage - £18,203

Build a flat roof extension - £21,703

Build a dormer loft conversion - £41,703

Concrete foundations - £5,953

Convert a bungalow loft - £28,703

Convert a basement - £34,161