Find a builder to make your building structurally sound

RSJs support your new extension or other construction to ensure that your property is structurally sound. They are crucial parts of your building work that mustn't be ignored, and must be installed by a professional.  To see prices and availability for your job click Get quotes.

HaMuch is Excellent

Install an RSJ cost in LD3 - Sort by rates or availability

From £1,840

(last active 28/04/26)
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DEREK REES BUILDING MAINTENANC

DEREK REES BUILDING MAINTENANC is an established extension buildering business in LD3. We come highly recommended and provide competitive quotes fo...

From £1,944

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SEER CONSTRUCTION LTD

Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

RSJ cost in LD3

Estimates for install an rsj near LD3

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in LD3 it ranges from £1,840 (DEREK REES BUILDING MAINTENANC based in LD3) to £1,944 (SEER CONSTRUCTION LTD based in LD3).

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 LD3 by posting a job with HaMuch and we will send it to extension builders in LD3.


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Estimates for common extension builder jobs in LD3;

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.

More extensions & conversions cost guides...