From £1,728
Need an Extension Builder in CF42? A POWELL CONSTRUCTION LTD has been helping local clients (20 mile radius) with their extension buildering jobs f...
From £1,776
L E JONES BUILDER is an established extension buildering business in CF42. We come highly recommended and provide competitive quotes for your work....

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in CF42 it ranges from £1,728 (A POWELL CONSTRUCTION LTD based in CF44) to £1,776 (L E JONES BUILDER based in CF43).
Comparing extension builders estimates for fitting an RSJ 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 install an RSJ in CF42 by posting a job with HaMuch and we will send it to extension builders in CF42.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Rhondda, Cynon, Taff | £31 | £209 |
| Install An RSJ near Aberdare | £32 | £212 |
| Install An RSJ near Rhondda | £31 | £206 |
| Install An RSJ near Maesteg | £38 | £283 |
| Install An RSJ near Merthyr Tydfil | £33 | £220 |
| Install An RSJ near Pontypridd | £33 | £211 |
| Install An RSJ near Neath Port Talbot | £31 | £224 |
| Install An RSJ near Church Village | £34 | £214 |
| Install An RSJ near Bridgend | £32 | £200 |
| Install An RSJ 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 - £17,052

Two storey extension - £87,328

Build a timber frame extension - £25,552

Build a swimming pool - £80,552

Single storey extension - £46,040

Side return extension - £36,460

Install an RSJ - £1,752

Outbuilding - £9,552

Build a Mansard loft conversion - £51,552

Loft conversion - £29,550

Build a kitchen extension - £41,552

Hip to gable loft conversion - £41,552

Granny annexe - £86,552

Garden office - £9,552

Convert a Garage - £15,552

Garage - £18,052

Build a flat roof extension - £21,552

Build a dormer loft conversion - £41,552

Concrete foundations - £5,802

Convert a bungalow loft - £28,552

Convert a basement - £32,460