From £2,184
Lambert Home Builds is a trusted extension builder serving customers in OX13 and the surrounding area. Contact us to today to get a competitive quo...
From £2,392
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,400
The business can carry out all aspects of building work:- single or double storey extensions- kitchen and bathroom installations- p...
From £2,416
Experienced extension builder ready to quote for your work. DRC Construction is the best extension builder in OX13. No obligation free quotes and m...
From £2,416
Need to find an Extension Builder near you for all your extension buildering work?
BA Knott Oxford Ltd provides a local, trusted extension ...
From £2,328
Relax... you have found a reliable extension builder in OX13. CHF CONSTRUCTION is a friendly and reliable company based in OX13 who consider no job...
From £2,392
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £1,680
MR HOWELL are here to help customers who need an Extension Builder in OX13. We offer a competitive rate to complete all your extension buildering j...
From £2,440
Approved extension builder in OX13, covering 20 miles.
Whatever extension buildering work you need, including emergency repairs, hire a comp...
From £2,272
We have a skilled and dedicated team of professional tradesmen to carry out all your requirements. Whether you are looking to build, extend or upgr...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in OX13 it ranges from £1,680 (MR HOWELL based in SN3) to £2,440 (APH Construction Limited based in OX2).
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 OX13 by posting a job with HaMuch and we will send it to extension builders in OX13.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Abingdon-on-Thames | £35 | £258 |
| Install An RSJ near Oxford | £37 | £261 |
| Install An RSJ near Vale of White Horse | £36 | £271 |
| Install An RSJ near Didcot | £36 | £266 |
| Install An RSJ near Witney | £32 | £244 |
| Install An RSJ near South Oxfordshire | £36 | £253 |
| Install An RSJ near Cherwell | £35 | £249 |
| Install An RSJ near Bicester | £35 | £249 |
| Install An RSJ near Stratton St Margaret | £37 | £238 |
| Install An RSJ near Newbury | £37 | £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 - £17,592

Two storey extension - £88,138

Build a timber frame extension - £26,092

Build a swimming pool - £81,092

Single storey extension - £56,840

Side return extension - £42,535

Install an RSJ - £2,292

Outbuilding - £10,092

Build a Mansard loft conversion - £52,092

Loft conversion - £34,613

Build a kitchen extension - £42,092

Hip to gable loft conversion - £42,092

Granny annexe - £87,092

Garden office - £10,092

Convert a Garage - £16,092

Garage - £18,592

Build a flat roof extension - £22,092

Build a dormer loft conversion - £42,092

Concrete foundations - £6,342

Convert a bungalow loft - £29,092

Convert a basement - £38,535