From £2,048
SS BUILDER are here to help customers who need an Extension Builder in SA12. We offer a competitive rate to complete all your extension buildering ...
From £2,032
Need an Extension Builder in SA12? K.D.L Property Maintenance has been helping local clients (20 mile radius) with their extension buildering jobs ...
From £2,176
Trusted and professional extension builder in SA12. Experienced in all extension buildering work and keeping within budget and on quote. HALL & HAR...
From £1,960
Marin Hughes General Builders is a trusted extension builder serving customers in SA12 and the surrounding area. Contact us to today to get a compe...
From £2,152
Trusted and professional extension builder in SA12. Experienced in all extension buildering work and keeping within budget and on quote. Complete B...
From £2,136
A Room at the Top are here to help customers who need an Extension Builder in SA12. We offer a competitive rate to complete all your extension buil...
From £1,832
Karina Lane Construction Ltd are here to help customers who need an Extension Builder in SA12. We offer a competitive rate to complete all your ext...
From £2,200
R.H Damp Proofing are here to help customers who need an Extension Builder in SA12. We offer a competitive rate to complete all your extension buil...
From £2,096
Fit kitchens and more ltd is an established and experienced local extension builder in SA12. Please contact us for a free, no obligation quote and ...
From £1,912
Trusted and professional extension builder in SA12. Experienced in all extension buildering work and keeping within budget and on quote. Masterbuil...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in SA12 it ranges from £1,832 (Karina Lane Construction Ltd based in SA7) to £2,200 (R.H Damp Proofing based in SA1).
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 SA12 by posting a job with HaMuch and we will send it to extension builders in SA12.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Port Talbot | £26 | £188 |
| Install An RSJ near Neath | £25 | £191 |
| Install An RSJ near Maesteg | £32 | £239 |
| Install An RSJ near Neath Port Talbot | £26 | £188 |
| Install An RSJ near Swansea | £25 | £197 |
| Install An RSJ near Pyle | £30 | £234 |
| Install An RSJ near Porthcawl | £29 | £228 |
| Install An RSJ near Bridgend | £27 | £170 |
| Install An RSJ near Gorseinon | £25 | £196 |
| Install An RSJ near Rhondda | £27 | £183 |
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 - £17,354

Two storey extension - £87,782

Build a timber frame extension - £25,854

Build a swimming pool - £80,854

Single storey extension - £52,088

Side return extension - £39,862

Install an RSJ - £2,054

Outbuilding - £9,854

Build a Mansard loft conversion - £51,854

Loft conversion - £32,385

Build a kitchen extension - £41,854

Hip to gable loft conversion - £41,854

Granny annexe - £86,854

Garden office - £9,854

Convert a Garage - £15,854

Garage - £18,354

Build a flat roof extension - £21,854

Build a dormer loft conversion - £41,854

Concrete foundations - £6,104

Convert a bungalow loft - £28,854

Convert a basement - £35,862