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 £2,184

Last active Oct 26

2 reviews

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RCB Group Design & Build

Vasi J

No Call out charges! 

All Jobs Fully Insured and Guaranteed !!!

All aspects of Plumbing, Heating and Drains....

...

"I am very pleased with the work carried out. All very clear and transparent." - ROMFORD,reviewed 10/01/18, KELLY

From £2,256

Last active Oct 26
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The Perfectionist

Experienced extension builder ready to quote for your work. The Perfectionist is the best extension builder in SE23. No obligation free quotes and ...

From £2,352

Last active Jan 26
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S G Painting Contractor Ltd

Relax... you have found a reliable extension builder in SE23. S G Painting Contractor Ltd is a friendly and reliable company based in SE23 who cons...

From £2,304

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South East Builders

South East Builders are here to help customers who need an Extension Builder in SE23. We offer a competitive rate to complete all your extension bu...

From £2,448

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Baseline Build and Renovate Ltd

Baseline Build and Renovate Ltd is an established extension buildering business in SE23. We come highly recommended and provide competitive quotes ...

From £2,224

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GreenGauge Heating Limited

Jeremy Weston, trading as GreenGauge has over 10 years experience working as a Heating Engineer. Fully Insured and Gas Safe Registered.Base...

From £2,632

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Universal Plastering Ltd

We are a family run local business that was founded in 2007. Universal Plastering Ltd provides a wide variety of building and plastering services i...

From £2,080

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FRIERN BUILDING LTD

FRIERN BUILDING LTD is an established extension buildering business in SE23. We come highly recommended and provide competitive quotes for your wor...

From £2,472

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BERNARD CONSTRUCTION LTD

BERNARD CONSTRUCTION LTD are here to help customers who need an Extension Builder in SE23. We offer a competitive rate to complete all your extensi...

From £2,296

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S W BUILDPROVEMENT

Whether you are looking to build, extend or upgrade we will help. From building to decorating. Our professional team have the skills and experie...

RSJ cost in SE23

Estimates for install an rsj near SE23

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in SE23 it ranges from £2,080 (FRIERN BUILDING LTD based in SE22) to £2,632 (Universal Plastering Ltd based in SE19).

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 SE23 by posting a job with HaMuch and we will send it to extension builders in SE23.


Estimates for common extension builder jobs in SE23;

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...