CEDAR INTERIORS LIMITED are here to help customers who need an Extension Builder in OX15. We offer a competitive rate to complete all your extensio...
From £2,104
NJM GENERAL BUILDING CONTRACTO is an established and experienced local extension builder in OX15. Please contact us for a free, no obligation quote...
From £2,352
Haras Building Contractors Ltd is a family run business with over 20 years experience within the building trade. We firmly believe in and work from...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in OX15 it ranges from £2,032 (CEDAR INTERIORS LIMITED based in OX16) to £2,352 (Haras Building Contractors Ltd based in OX16).
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 OX15 by posting a job with HaMuch and we will send it to extension builders in OX15.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Banbury | £33 | £239 |
| Install An RSJ near Cherwell | £35 | £249 |
| Install An RSJ near Bicester | £35 | £249 |
| Install An RSJ near Stratford-upon-Avon | £27 | £215 |
| Install An RSJ near Stratford-on-Avon | £27 | £215 |
| Install An RSJ near Daventry | £31 | £230 |
| Install An RSJ near Witney | £32 | £244 |
| Install An RSJ near Leamington Spa | £27 | £212 |
| Install An RSJ near Warwick | £28 | £213 |
| Install An RSJ near Oxford | £37 | £261 |
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 - £17,463

Two storey extension - £87,944

Build a timber frame extension - £25,963

Build a swimming pool - £80,963

Single storey extension - £54,253

Side return extension - £41,080

Install an RSJ - £2,163

Outbuilding - £9,963

Build a Mansard loft conversion - £51,963

Loft conversion - £33,400

Build a kitchen extension - £41,963

Hip to gable loft conversion - £41,963

Granny annexe - £86,963

Garden office - £9,963

Convert a Garage - £15,963

Garage - £18,463

Build a flat roof extension - £21,963

Build a dormer loft conversion - £41,963

Concrete foundations - £6,213

Convert a bungalow loft - £28,963

Convert a basement - £37,080