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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Install an RSJ cost in E20 - Sort by rates or availability

From £2,080

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Can design and Construction

Erald Kanani

Member since August 2025

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

From £2,600

Last active Oct 26
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Decorating Building Service

Decorating Building Service are here to help customers who need an Extension Builder in E20. We offer a competitive rate to complete all your exten...

From £2,232

Last active Oct 26
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M & S Builders

M & S Builders is a trusted extension builder serving customers in E20 and the surrounding area. Contact us to today to get a competitive quote for...

From £2,168

Last active Sep 26
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B J CULLEN BUILDERS

B J CULLEN BUILDERS are here to help customers who need an Extension Builder in E20. We offer a competitive rate to complete all your extension bui...

From £2,232

Last active Sep 26
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Major Building Contractors Ltd

Relax... you have found a reliable extension builder in E20. Major Building Contractors Ltd is a friendly and reliable company based in E20 who con...

From £2,384

Last active Sep 26
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Sz Builders

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

Sz Builders provides a local, trusted extension builderi...

From £2,912

Last active Sep 26
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Render

Experienced extension builder ready to quote for your work. Render is the best extension builder in E20. No obligation free quotes and many happy c...

From £2,096

Last active Sep 26
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Jhon

Experienced extension builder ready to quote for your work. Jhon is the best extension builder in E20. No obligation free quotes and many happy cus...

From £2,184

Last active Sep 26
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CREATIVE BUILDING SOLUTIONS

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

From £2,472

Last active Aug 26
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Kunshi Services UK Ltd

Kunshi Services UK Ltd is a trusted extension builder serving customers in E20 and the surrounding area. Contact us to today to get a competitive q...

RSJ cost in E20

Estimates for install an rsj near E20

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in E20 it ranges from £2,080 (Can design and Construction based in Ig11) to £2,912 (Render based in IG1).

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 E20 by posting a job with HaMuch and we will send it to extension builders in E20.


Estimates for common extension builder jobs in E20;

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...