From £25,792
T Porter Buiding is an established and experienced local extension builder in CF23. Please contact us for a free, no obligation quote and competiti...
From £25,632
Relax... you have found a reliable extension builder in CF23. Charles Marshall Contracting Ltd is a friendly and reliable company based in CF23 who...
From £25,200
Very reliable honest and hard working guarantee all work clean and tidy first class work
From £25,760
Sharif General Builder is an established and experienced local extension builder in CF23. Please contact us for a free, no obligation quote and com...
From £25,728
Experienced extension builder ready to quote for your work. Limitlesskitchens is the best extension builder in CF23. No obligation free quotes and ...
From £25,880
Relax... you have found a reliable extension builder in CF23. A M I Construction is a friendly and reliable company based in CF23 who consider no j...
From £25,840
MOORLAND DESIGN & BUILD LTD are here to help customers who need an Extension Builder in CF23. We offer a competitive rate to complete all your exte...
From £25,728
Neil Causon & Son is an established and experienced local extension builder in CF23. Please contact us for a free, no obligation quote and competit...
From £25,760
Construction Jobs is an established and experienced local extension builder in CF23. Please contact us for a free, no obligation quote and competit...
From £25,816
Eric J Ivins is a trusted extension builder serving customers in CF23 and the surrounding area. Contact us to today to get a competitive quote for ...

A timber frame extension built in CF23 typically ranges from £25,200 (A.Gaddarn Builders based in NP11) to £25,880 (A M I Construction based in NP26), 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 CF23 by posting a job with HaMuch and we'll send it to extension builders in CF23.
"Timber frame extension" - CF3, job posted 02/11/26
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Timber Frame Extension near Cardiff | £34 | £219 |
| Build A Timber Frame Extension near Caerphilly | £33 | £208 |
| Build A Timber Frame Extension near Penarth | £35 | £218 |
| Build A Timber Frame Extension near Risca | £32 | £218 |
| Build A Timber Frame Extension near Church Village | £34 | £214 |
| Build A Timber Frame Extension near Newport | £41 | £233 |
| Build A Timber Frame Extension near Pontypridd | £33 | £211 |
| Build A Timber Frame Extension near Barry | £33 | £218 |
| Build A Timber Frame Extension near Cwmbran | £43 | £219 |
| Build A Timber Frame Extension near Rhondda | £31 | £206 |
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 - £17,214

Two storey extension - £87,570

Build a timber frame extension - £25,714

Build a swimming pool - £80,714

Single storey extension - £49,272

Side return extension - £38,278

Install an RSJ - £1,914

Outbuilding - £9,714

Build a Mansard loft conversion - £51,714

Loft conversion - £31,065

Build a kitchen extension - £41,714

Hip to gable loft conversion - £41,714

Granny annexe - £86,714

Garden office - £9,714

Convert a Garage - £15,714

Garage - £18,214

Build a flat roof extension - £21,714

Build a dormer loft conversion - £41,714

Concrete foundations - £5,964

Convert a bungalow loft - £28,714

Convert a basement - £34,278