Cost to fit an RSJ in BT4

RSJ cost in BT4

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in BT4 it ranges from £1,568 (SM Plumbing & Heating based in BT7) to £1,568 (SM Plumbing & Heating based in BT7).

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 BT4 by posting a job with HaMuch and we will send it to extension builders in BT4.

"RSJ installation" - BELFAST, job posted 09/08/25

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Location in UK	Hourly Rate	Daily Rate
Install An RSJ near Belfast	£23	£161
Install An RSJ near Holywood	£23	£159
Install An RSJ near Carryduff	£23	£158
Install An RSJ near Comber	£22	£160
Install An RSJ near Greenisland	£23	£153
Install An RSJ near Ballygowan	£24	£183
Install An RSJ near Bangor	£24	£183
Install An RSJ near Bangor	£24	£183
Install An RSJ near Carrickfergus	£23	£158
Install An RSJ near Lisburn	£24	£164

Estimates for common extension builder jobs in BT4;

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.