Cost to fit an RSJ in SY23

Install an RSJ cost in SY23

RSJ cost in SY23

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in SY23 it ranges from £1,808 (SP Coupland Ltd based in SY25) to £1,816 (DRAGON CONSTRUCTION T/A based in SY25).

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 SY23 by posting a job with HaMuch and we will send it to extension builders in SY23.

Estimates for common extension builder jobs in SY23;

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.