Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Trusted and professional extension builder in S66. Experienced in all extension buildering work and keeping within budget and on quote. Britishbuil...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in S66 it ranges from £2,040 (Britishbuildogs based in S65) to £2,304 (G.J.H Joinery & Construction based in S65).
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 S66 by posting a job with HaMuch and we will send it to extension builders in S66.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Wickersley | £32 | £258 |
| Install An RSJ near Rotherham | £32 | £257 |
| Install An RSJ near Doncaster | £29 | £238 |
| Install An RSJ near Worksop | £33 | £265 |
| Install An RSJ near Sheffield | £32 | £261 |
| Install An RSJ near Dronfield | £33 | £262 |
| Install An RSJ near Bassetlaw | £31 | £243 |
| Install An RSJ near Barnsley | £31 | £242 |
| Install An RSJ near Retford | £31 | £243 |
| Install An RSJ near Chesterfield | £33 | £257 |
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 - £17,472

Two storey extension - £87,958

Build a timber frame extension - £25,972

Build a swimming pool - £80,972

Single storey extension - £54,440

Side return extension - £41,185

Install an RSJ - £2,172

Outbuilding - £9,972

Build a Mansard loft conversion - £51,972

Loft conversion - £33,488

Build a kitchen extension - £41,972

Hip to gable loft conversion - £41,972

Granny annexe - £86,972

Garden office - £9,972

Convert a Garage - £15,972

Garage - £18,472

Build a flat roof extension - £21,972

Build a dormer loft conversion - £41,972

Concrete foundations - £6,222

Convert a bungalow loft - £28,972

Convert a basement - £37,185