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 £2,816

Last active Oct 26
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HOUSE BUILDING SERVICES LIMITED

Tommy House

HOUSE BUILDING SERVICES LIMITED is a trusted extension builder serving customers in SE9 and the surrounding area. Contact us to today to get a comp...

From £1,816

Last active Sep 26
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Jmc buildets

Jay Christenson

Experienced extension builder ready to quote for your work. Jmc buildets is the best extension builder in SE9. No obligation free quotes and many h...

From £2,072

Last active Sep 26
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AMJAC CONSTRUCTION LTD

Location

Eltham, SE9

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

AMJAC CONSTRUCTION LTD provides a local, trusted extensi...

From £2,136

Last active Sep 26
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RLD Contractors Ltd

RLD Contractors Ltd is an established and experienced local extension builder in SE9. Please contact us for a free, no obligation quote and competi...

From £2,240

Last active Sep 26
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Pro-Tec Roofing & Building Services Ltd

Pro-Tec Roofing & Building Services Ltd is an established and experienced local extension builder in SE9. Please contact us for a free, no obligati...

From £2,160

Last active Aug 26
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Rapid Bee Ltd

Rapid Bee Ltd is an established extension buildering business in SE9. We come highly recommended and provide competitive quotes for your work.

...

From £2,416

Last active Jun 26
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Aumosa Ltd

Experienced extension builder ready to quote for your work. Aumosa Ltd is the best extension builder in SE9. No obligation free quotes and many hap...

From £2,328

Last active Jun 26
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Upwards and Outwards

Relax... you have found a reliable extension builder in SE9. Upwards and Outwards is a friendly and reliable company based in SE9 who consider no j...

From £2,336

Last active Apr 26
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Hartigans Construction

Andy Hart

Location

London, SE9

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

Hartigans Construction provides a local, trusted extensi...

From £2,384

Last active Apr 26
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Loft Living

Need an Extension Builder in SE9? Loft Living has been helping local clients (5 mile radius) with their extension buildering jobs for many years. G...

RSJ cost in SE9

Estimates for install an rsj near SE9

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in SE9 it ranges from £1,816 (Jmc buildets based in SE9) to £2,816 (HOUSE BUILDING SERVICES LIMITED based in DA16).

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 SE9 by posting a job with HaMuch and we will send it to extension builders in SE9.

"RSJ installation - check if we need one installed" - ELTHAM, job posted 01/06/25


Estimates for common extension builder jobs in SE9;

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...