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 £2,576

Last active Oct 26
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WT Construction Service Ltd

Need the extension buildering job done quickly without breaking the bank? WT Construction Service Ltd offer fast, reliable, and affordable extensio...

From £2,576

Last active Oct 26
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Pavillion Building Services

Relax... you have found a reliable extension builder in N12. Pavillion Building Services is a friendly and reliable company based in N12 who consid...

From £1,520

Last active Aug 26
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Onyx Iv

Ivaylo Shkodrov

Extremely reliable service . Flexibility, correct, listening customer.  Wide experience.  

From £2,296

Last active Aug 26
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Taylor Construction Services Ltd

Relax... you have found a reliable extension builder in N12. Taylor Construction Services Ltd is a friendly and reliable company based in N12 who c...

From £2,128

Last active Aug 26
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Raf's Building Service

Need to find an Extension Builder near you for all your extension buildering work?

Raf's Building Service provides a local, trusted extensi...

From £2,576

Last active Aug 26
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DS Construction

Trusted and professional extension builder in N12. Experienced in all extension buildering work and keeping within budget and on quote. DS Construc...

From £2,632

Last active Aug 26
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Odp Builders

Need an Extension Builder in N12? Odp Builders has been helping local clients (5 mile radius) with their extension buildering jobs for many years. ...

From £2,184

Last active Aug 26
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RF Building Services

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

From £2,784

Last active Aug 26
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Homeworks Design & Build Ltd

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

From £2,488

Last active Jul 26
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D.J Coyle & Co.Ltd

Trusted and professional extension builder in N12. Experienced in all extension buildering work and keeping within budget and on quote. D.J Coyle &...

RSJ cost in N12

Estimates for install an rsj near N12

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in N12 it ranges from £1,520 (Onyx Iv based in N11) to £2,784 (Homeworks Design & Build Ltd based in N20).

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 N12 by posting a job with HaMuch and we will send it to extension builders in N12.


Estimates for common extension builder jobs in N12;

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...