From £2,464
MG Property Maintenance & Services is a trusted extension builder serving customers in Oxford and the surrounding area. Contact us to today to get ...
From £2,152
Trusted and professional extension builder in Oxford. Experienced in all extension buildering work and keeping within budget and on quote. Design &...
From £2,544
Trusted and professional extension builder in Oxford. Experienced in all extension buildering work and keeping within budget and on quote. Crawford...
From £2,232
CROWN CONSTRUCTION is an established extension buildering business in Oxford. We come highly recommended and provide competitive quotes for your wo...
From £2,424
TNT CONSTRUCTION are here to help customers who need an Extension Builder in Oxford. We offer a competitive rate to complete all your extension bui...
From £2,056
Trusted and professional extension builder in Oxford. Experienced in all extension buildering work and keeping within budget and on quote. Spatial ...
From £216
Oxford, OX4
Trusted and professional extension builder in Oxford. Experienced in all extension buildering work and keeping within budget and on quote. Beaumont...
From £2,368
Singh Builders is an established extension buildering business in Oxford. We come highly recommended and provide competitive quotes for your work.<...
From £2,712
Oxford, OX2
Michael E Phillips is an established extension buildering business in Oxford. We come highly recommended and provide competitive quotes for your wo...
From £2,392
Oxford, OX3
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Oxford it ranges from £216 (Beaumont Design & Build Ltd based in OX4) to £2,712 (Michael E Phillips 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 Oxford by posting a job with HaMuch and we will send it to extension builders in Oxford.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Oxford | £37 | £263 |
| Install An RSJ near Abingdon-on-Thames | £35 | £258 |
| Install An RSJ near Cherwell | £35 | £249 |
| Install An RSJ near Witney | £32 | £244 |
| Install An RSJ near Didcot | £36 | £266 |
| Install An RSJ near South Oxfordshire | £36 | £253 |
| Install An RSJ near Bicester | £35 | £249 |
| Install An RSJ near Vale of White Horse | £36 | £271 |
| Install An RSJ near Aylesbury Vale | £36 | £246 |
| Install An RSJ near Aylesbury | £42 | £270 |
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 - £17,456

Two storey extension - £87,934

Build a timber frame extension - £25,956

Build a swimming pool - £80,956

Single storey extension - £54,120

Side return extension - £41,005

Install an RSJ - £2,156

Outbuilding - £9,956

Build a Mansard loft conversion - £51,956

Loft conversion - £33,338

Build a kitchen extension - £41,956

Hip to gable loft conversion - £41,956

Granny annexe - £86,956

Garden office - £9,956

Convert a Garage - £15,956

Garage - £18,456

Build a flat roof extension - £21,956

Build a dormer loft conversion - £41,956

Concrete foundations - £6,206

Convert a bungalow loft - £28,956

Convert a basement - £37,005