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 £2,648

Last active Nov 26
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London Construction

London Construction is an established and experienced local extension builder in SW12. Please contact us for a free, no obligation quote and compet...

From £2,384

Last active Nov 26
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QA's Pointing and Brick Repair

QA's Pointing Brick Repair

Relax... you have found a reliable extension builder in SW12. QA's Pointing and Brick Repair is a friendly and reliable company based in SW12 who c...

From £2,304

Last active Oct 26
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Langston Builders

Langston Builders is a trusted extension builder serving customers in SW12 and the surrounding area. Contact us to today to get a competitive quote...

From £2,520

Last active Oct 26
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Renaissance Timothy Brewer Ltd

Renaissance Timothy Brewer Ltd is an established extension buildering business in SW12. We come highly recommended and provide competitive quotes f...

From £2,240

Last active Oct 26
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PW Construction & Renovation Ltd

PW Construction & Renovation Ltd is a trusted extension builder serving customers in SW12 and the surrounding area. Contact us to today to get a co...

From £2,520

Last active Sep 26
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D & G Building & Decorating

Experienced extension builder ready to quote for your work. D & G Building & Decorating is the best extension builder in SW12. No obligation free q...

From £2,536

Last active Sep 26
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PRM BUILDING

Relax... you have found a reliable extension builder in SW12. PRM BUILDING is a friendly and reliable company based in SW12 who consider no job as ...

From £2,520

Last active Sep 26
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QSA Builders Ltd

QSA Builders Ltd are here to help customers who need an Extension Builder in SW12. We offer a competitive rate to complete all your extension build...

From £2,216

Last active Sep 26
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Local Building Services

Trusted and professional extension builder in SW12. Experienced in all extension buildering work and keeping within budget and on quote. Local Buil...

From £2,216

Last active Jul 26
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R C BUILDER

R C BUILDER is a trusted extension builder serving customers in SW12 and the surrounding area. Contact us to today to get a competitive quote for e...

RSJ cost in SW12

Estimates for install an rsj near SW12

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in SW12 it ranges from £2,216 (Local Building Services based in SW16) to £2,648 (London Construction based in SW11).

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 SW12 by posting a job with HaMuch and we will send it to extension builders in SW12.


Estimates for common extension builder jobs in SW12;

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...