Cost to fit an RSJ in CR5

RSJ cost in CR5

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in CR5 it ranges from £1,680 (First Trade Force based in Cr5) to £2,840 (G&R CONSTRUCTION LTD based in CR8).

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 CR5 by posting a job with HaMuch and we will send it to extension builders in CR5.

"RSJ installation also I will need help with the cost of theses below IRS extension either the following measurements. L-3m w-3.5m H-Item Site Preparation Groundworks & Foundations Floor Construction Superstructure Roof Construction Windows and External Doors Internal Works Electrical ..." - CR3, job posted 11/08/25

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Estimates for common extension builder jobs in CR5;

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.