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Need an Extension Builder in OX5? K C CONSTRUCTION has been helping local clients (20 mile radius) with their extension buildering jobs for many ye...
R AND J CONSTRUCTION is an established and experienced local extension builder in OX5. Please contact us for a free, no obligation quote and compet...
From £2,296
KEITH COOK CONSTRUCTION LIMITED are here to help customers who need an Extension Builder in OX5. We offer a competitive rate to complete all your e...
From £2,288
Trusted and professional extension builder in OX5. Experienced in all extension buildering work and keeping within budget and on quote. Macfarlane ...
From £2,544
Need an Extension Builder in OX5? Yarnton Leisure Buildings has been helping local clients (20 mile radius) with their extension buildering jobs fo...
From £2,152
Inspired Restorations offer a range of services that cover all aspects of property renovations and maintenance. Whether you require a full renovati...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in OX5 it ranges from £2,024 (R AND J CONSTRUCTION based in OX2) to £2,544 (Yarnton Leisure Buildings based in OX5).
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 OX5 by posting a job with HaMuch and we will send it to extension builders in OX5.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Cherwell | £35 | £249 |
| Install An RSJ near Oxford | £38 | £270 |
| Install An RSJ near Bicester | £35 | £249 |
| Install An RSJ near Witney | £32 | £244 |
| Install An RSJ near Abingdon-on-Thames | £35 | £258 |
| Install An RSJ near South Oxfordshire | £36 | £253 |
| Install An RSJ near Didcot | £36 | £266 |
| Install An RSJ near Vale of White Horse | £36 | £271 |
| Install An RSJ near Aylesbury Vale | £36 | £246 |
| Install An RSJ near Banbury | £33 | £239 |
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 - £17,588

Two storey extension - £88,132

Build a timber frame extension - £26,088

Build a swimming pool - £81,088

Single storey extension - £56,760

Side return extension - £42,490

Install an RSJ - £2,288

Outbuilding - £10,088

Build a Mansard loft conversion - £52,088

Loft conversion - £34,575

Build a kitchen extension - £42,088

Hip to gable loft conversion - £42,088

Granny annexe - £87,088

Garden office - £10,088

Convert a Garage - £16,088

Garage - £18,588

Build a flat roof extension - £22,088

Build a dormer loft conversion - £42,088

Concrete foundations - £6,338

Convert a bungalow loft - £29,088

Convert a basement - £38,490