Cost to fit an RSJ in SL3

Install an RSJ cost in SL3

RSJ cost in SL3

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in SL3 it ranges from £1,744 (Drains R Uss based in SL3) to £2,536 (Tom's Builders based in SL3).

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 SL3 by posting a job with HaMuch and we will send it to extension builders in SL3.

"RSJ installation" - SLOUGH, job posted 05/07/25

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Location in UK	Hourly Rate	Daily Rate
Install An RSJ near Slough	£42	£272
Install An RSJ near Windsor & Maidenhead	£42	£272
Install An RSJ near Windsor	£41	£271
Install An RSJ near Staines-upon-Thames	£42	£269
Install An RSJ near Egham	£42	£266
Install An RSJ near Hillingdon	£62	£276
Install An RSJ near Gerrards Cross	£43	£282
Install An RSJ near Maidenhead	£41	£273
Install An RSJ near Ascot	£41	£276
Install An RSJ near Sunbury-on-Thames	£42	£279

Estimates for common extension builder jobs in SL3;

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.