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 £2,576

Last active Nov 26
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Exquisite Design & Build Ltd

Need an Extension Builder in South East? Exquisite Design & Build Ltd has been helping local clients (5 mile radius) with their extension builderin...

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 South East. No obligation free quote...

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 South East. No obligation ...

From £2,448

Last active Sep 26
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Cornerstones Construction

Experienced extension builder ready to quote for your work. Cornerstones Construction is the best extension builder in South East. No obligation fr...

From £2,408

Last active Sep 26
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Vidanov Building Services

Trusted and professional extension builder in South East. Experienced in all extension buildering work and keeping within budget and on quote. Vida...

From £2,456

Last active Sep 26
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DUWIX BUILDING MAINTENANCE

DUWIX BUILDING MAINTENANCE are here to help customers who need an Extension Builder in South East. We offer a competitive rate to complete all your...

From £2,296

Last active Sep 26
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Building and Plastering Solution

Peter Cesma

Experienced builder in all aspects of building works. All work guaranteed. Quality finish, promt ,honest and reliable services.  Public liabil...

From £2,376

Last active Aug 26
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Home Tranformers Ltd

At Home Tranformers Ltd we have been fitting bespoke bathrooms for over 10 years. We pride ourselves on being the go-to bathroom fitters for discer...

From £2,656

Last active Jul 26
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Ask Building

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

Ask Building provides a local, trusted extension builder...

RSJ cost in South East

Estimates for install an rsj near South East

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in South East it ranges from £2,184 (RCB Group Design & Build based in SE21) to £2,656 (Ask Building based in SE1).

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


Estimates for common extension builder jobs in South East;

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...