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How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in GL12 it ranges from £2,104 (M J LLEWLLYN BUILDING SERVICES based in GL12) to £2,296 (STAG Design & Build Ltd based in GL12).
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 GL12 by posting a job with HaMuch and we will send it to extension builders in GL12.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Yate | £34 | £263 |
| Install An RSJ near South Gloucestershire | £34 | £260 |
| Install An RSJ near Bradley Stoke | £34 | £259 |
| Install An RSJ near Stroud | £33 | £249 |
| Install An RSJ near Kingswood | £34 | £257 |
| Install An RSJ near Chippenham | £34 | £258 |
| Install An RSJ near Quedgeley | £31 | £247 |
| Install An RSJ near Bristol | £33 | £255 |
| Install An RSJ near Clifton | £33 | £255 |
| Install An RSJ near Keynsham | £33 | £251 |
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 - £17,500

Two storey extension - £88,000

Build a timber frame extension - £26,000

Build a swimming pool - £81,000

Single storey extension - £55,000

Side return extension - £41,500

Install an RSJ - £2,200

Outbuilding - £10,000

Build a Mansard loft conversion - £52,000

Loft conversion - £33,750

Build a kitchen extension - £42,000

Hip to gable loft conversion - £42,000

Granny annexe - £87,000

Garden office - £10,000

Convert a Garage - £16,000

Garage - £18,500

Build a flat roof extension - £22,000

Build a dormer loft conversion - £42,000

Concrete foundations - £6,250

Convert a bungalow loft - £29,000

Convert a basement - £37,500