From £4,280
Silicone Render System Ltd is a plastering company based in Porthcawl, with over 20 years’ experience in the plastering trade. W...
From £2,096
Barlam Drylining Ltd are here to help customers who need an Extension Builder in CF35. We offer a competitive rate to complete all your extension b...
From £1,400
Very reliable honest and hard working guarantee all work clean and tidy first class work
From £1,816
Experienced extension builder ready to quote for your work. JA Building Maintenance is the best extension builder in CF35. No obligation free quote...
From £1,984
Experienced extension builder ready to quote for your work. TOR BUILD is the best extension builder in CF35. No obligation free quotes and many hap...
From £1,832
Karina Lane Construction Ltd are here to help customers who need an Extension Builder in CF35. We offer a competitive rate to complete all your ext...
From £1,912
Trusted and professional extension builder in CF35. Experienced in all extension buildering work and keeping within budget and on quote. Masterbuil...
From £1,832
Relax... you have found a reliable extension builder in CF35. Charles Marshall Contracting Ltd is a friendly and reliable company based in CF35 who...
From £1,776
Relax... you have found a reliable extension builder in CF35. Cwtch Property Developments is a friendly and reliable company based in CF35 who cons...
From £2,152
Trusted and professional extension builder in CF35. Experienced in all extension buildering work and keeping within budget and on quote. Complete B...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in CF35 it ranges from £1,400 (A.Gaddarn Builders based in NP11) to £4,280 (Silicone Rendering Systems Ltd based in CF36).
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 CF35 by posting a job with HaMuch and we will send it to extension builders in CF35.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Bridgend | £32 | £200 |
| Install An RSJ near Pyle | £34 | £262 |
| Install An RSJ near Rhondda | £31 | £206 |
| Install An RSJ near Vale of Glamorgan | £29 | £217 |
| Install An RSJ near Porthcawl | £33 | £252 |
| Install An RSJ near Maesteg | £38 | £283 |
| Install An RSJ near Church Village | £34 | £214 |
| Install An RSJ near Rhondda, Cynon, Taff | £31 | £209 |
| Install An RSJ near Pontypridd | £33 | £211 |
| Install An RSJ near Barry | £33 | £218 |
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 - £17,408

Two storey extension - £87,862

Build a timber frame extension - £25,908

Build a swimming pool - £80,908

Single storey extension - £53,160

Side return extension - £40,465

Install an RSJ - £2,108

Outbuilding - £9,908

Build a Mansard loft conversion - £51,908

Loft conversion - £32,888

Build a kitchen extension - £41,908

Hip to gable loft conversion - £41,908

Granny annexe - £86,908

Garden office - £9,908

Convert a Garage - £15,908

Garage - £18,408

Build a flat roof extension - £21,908

Build a dormer loft conversion - £41,908

Concrete foundations - £6,158

Convert a bungalow loft - £28,908

Convert a basement - £36,465