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 green button.

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From £2,144

Last active May 26
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Jaymi Wright

Trusted and professional extension builder in North Lincolnshire. Experienced in all extension buildering work and keeping within budget and on quo...

From £1,800

Last active Apr 26
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A Kemp Build

A Kemp Build is a trusted extension builder serving customers in North Lincolnshire and the surrounding area. Contact us to today to get a competit...

From £2,000

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viking build

viking build is an established extension buildering business in North Lincolnshire. We come highly recommended and provide competitive quotes for y...

From £1,680

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Northfield General Builders Ltd

Experienced extension builder ready to quote for your work. Northfield General Builders Ltd is the best extension builder in North Lincolnshire. No...

RSJ cost in North Lincolnshire

Estimates for install an rsj near North Lincolnshire

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in North Lincolnshire it ranges from £1,680 (Northfield General Builders Ltd based in DN17) to £2,144 (Jaymi Wright based in DN16).

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

"RSJ installation to support a chimney which has been removed" - DN16, job posted 04/12/26


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Estimates for common extension builder jobs in North Lincolnshire;

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...