Relax... you have found a reliable extension builder in OX12. CHF CONSTRUCTION is a friendly and reliable company based in OX12 who consider no job...
From £2,400
WJW Home Improvements - Friendly and professional builders. We specialize in extensions, loft conversions, and big renovation projects. Our motto i...
From £2,424
SH Carpentry and Construction Ltd is a professional, reliable and friendly carpentry, joinery and general construction company working in and aroun...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in OX12 it ranges from £2,328 (CHF CONSTRUCTION based in OX12) to £2,424 (SH Carpentry & Construction Limited based in OX12).
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 OX12 by posting a job with HaMuch and we will send it to extension builders in OX12.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Vale of White Horse | £36 | £271 |
| Install An RSJ near Didcot | £36 | £266 |
| Install An RSJ near Abingdon-on-Thames | £35 | £258 |
| Install An RSJ near Oxford | £37 | £261 |
| Install An RSJ near Witney | £32 | £244 |
| Install An RSJ near Newbury | £37 | £262 |
| Install An RSJ near Stratton St Margaret | £32 | £238 |
| Install An RSJ near South Oxfordshire | £36 | £253 |
| Install An RSJ near Swindon | £31 | £238 |
| Install An RSJ near Thatcham | £38 | £266 |
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 - £17,684

Two storey extension - £88,276

Build a timber frame extension - £26,184

Build a swimming pool - £81,184

Single storey extension - £58,680

Side return extension - £43,570

Install an RSJ - £2,384

Outbuilding - £10,184

Build a Mansard loft conversion - £52,184

Loft conversion - £35,475

Build a kitchen extension - £42,184

Hip to gable loft conversion - £42,184

Granny annexe - £87,184

Garden office - £10,184

Convert a Garage - £16,184

Garage - £18,684

Build a flat roof extension - £22,184

Build a dormer loft conversion - £42,184

Concrete foundations - £6,434

Convert a bungalow loft - £29,184

Convert a basement - £39,570