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 £2,760

Last active Oct 26
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Rafix Building

Rafal Szczepanski

Our homes need to be regularly maintained and from time to time they need to be rejuvenated, modernised and enhanced. When it comes to building wor...

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 £2,144

Last active Oct 26
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New Finishes

New Finishes is a trusted extension builder serving customers in N20 and the surrounding area. Contact us to today to get a competitive quote for e...

From £2,576

Last active Oct 26
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Pavillion Building Services

Relax... you have found a reliable extension builder in N20. Pavillion Building Services is a friendly and reliable company based in N20 who consid...

From £2,408

Last active Oct 26
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Homeland Building Ltd

Homeland Building Ltd is a trusted extension builder serving customers in N20 and the surrounding area. Contact us to today to get a competitive qu...

From £2,256

Last active Oct 26
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Wittick Building Ltd

Wittick Building Ltd is a trusted extension builder serving customers in N20 and the surrounding area. Contact us to today to get a competitive quo...

From £2,408

Last active Sep 26
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Roni Lofts Conversions Ltd

Need an Extension Builder in N20? Roni Lofts Conversions Ltd has been helping local clients (10 mile radius) with their extension buildering jobs f...

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 N20. Taylor Construction Services Ltd is a friendly and reliable company based in N20 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...

RSJ cost in N20

Estimates for install an rsj near N20

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in N20 it ranges from £1,520 (Onyx Iv based in N11) to £2,760 (Rafix Building based in EN4).

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 N20 by posting a job with HaMuch and we will send it to extension builders in N20.


Estimates for common extension builder jobs in N20;

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...