Relax... you have found a reliable extension builder in OX9. Trew Builders is a friendly and reliable company based in OX9 who consider no job as t...
Platinum Build Ltd are here to help customers who need an Extension Builder in OX9. We offer a competitive rate to complete all your extension buil...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in OX9 it ranges from £2,328 (Trew Builders based in OX9) to £2,368 (Platinum Build Ltd based in OX9).
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 OX9 by posting a job with HaMuch and we will send it to extension builders in OX9.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near South Oxfordshire | £36 | £253 |
| Install An RSJ near Aylesbury | £42 | £270 |
| Install An RSJ near Wycombe | £40 | £271 |
| Install An RSJ near Aylesbury Vale | £36 | £246 |
| Install An RSJ near High Wycombe | £39 | £272 |
| Install An RSJ near Oxford | £37 | £261 |
| Install An RSJ near Hazlemere | £40 | £272 |
| Install An RSJ near Bicester | £35 | £249 |
| Install An RSJ near Abingdon-on-Thames | £35 | £258 |
| Install An RSJ near Cherwell | £35 | £249 |
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 - £17,648

Two storey extension - £88,222

Build a timber frame extension - £26,148

Build a swimming pool - £81,148

Single storey extension - £57,960

Side return extension - £43,165

Install an RSJ - £2,348

Outbuilding - £10,148

Build a Mansard loft conversion - £52,148

Loft conversion - £35,138

Build a kitchen extension - £42,148

Hip to gable loft conversion - £42,148

Granny annexe - £87,148

Garden office - £10,148

Convert a Garage - £16,148

Garage - £18,648

Build a flat roof extension - £22,148

Build a dormer loft conversion - £42,148

Concrete foundations - £6,398

Convert a bungalow loft - £29,148

Convert a basement - £39,165