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 £2,656

Last active Oct 26
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Up and Out Builds Ltd

Relax... you have found a reliable extension builder in SG12. Up and Out Builds Ltd is a friendly and reliable company based in SG12 who consider n...

From £2,392

Last active Apr 26
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Herts Loft Ltd

Herts Loft Ltd is an established extension buildering business in SG12. We come highly recommended and provide competitive quotes for your work.

From £2,624

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Hopson Bros Services

Hopson Bros Services is a trusted extension builder serving customers in SG12 and the surrounding area. Contact us to today to get a competitive qu...

From £2,424

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Groome & Sons Ltd

Experienced extension builder ready to quote for your work. Groome & Sons Ltd is the best extension builder in SG12. No obligation free quotes and ...

From £2,584

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D E BRACKEN BUILDING SERVICES

D E BRACKEN BUILDING SERVICES is an established and experienced local extension builder in SG12. Please contact us for a free, no obligation quote ...

From £2,360

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R & T Complete Building Services

R & T Complete Building Services is an established and experienced local extension builder in SG12. Please contact us for a free, no obligation quo...

From £2,472

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Landmark General Builders Ltd

Landmark General Builders Ltd are here to help customers who need an Extension Builder in SG12. We offer a competitive rate to complete all your ex...

From £2,328

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Nicholas James Home Improvements Ltd

Nicholas James Home Improvements Ltd are here to help customers who need an Extension Builder in SG12. We offer a competitive rate to complete all ...

From £2,200

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J B R Contracts

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

J B R Contracts provides a local, trusted extension buil...

From £2,424

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TJJ Construction Ltd

Need an Extension Builder in SG12? TJJ Construction Ltd has been helping local clients (10 mile radius) with their extension buildering jobs for ma...

RSJ cost in SG12

Estimates for install an rsj near SG12

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in SG12 it ranges from £2,200 (J B R Contracts based in SG14) to £2,656 (Up and Out Builds Ltd based in SG12).

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 SG12 by posting a job with HaMuch and we will send it to extension builders in SG12.


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Estimates for common extension builder jobs in SG12;

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...