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 £2,120

Rates updated Oct 26
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Lp Townsend Brickwork

Lee Townsend

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

Lp Townsend Brickwork provides a local, trusted extensio...

From £2,384

Rates verified Oct 26
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Buildmac Ltd

Chris Czerwinski

About us: Buildmac Ltd is a well-established, trustworthy, reliable and professional business based in High Wycombe, covering all surrounding areas...

From £2,480

Last active Oct 26
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ABC Associates STRUCTURES 4 U

Relax... you have found a reliable extension builder in Buckinghamshire. ABC Associates STRUCTURES 4 U is a friendly and reliable company based in ...

From £2,232

Last active Oct 26
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BeautifulRenovation

BeautifulRenovation are here to help customers who need an Extension Builder in Buckinghamshire. We offer a competitive rate to complete all your e...

From £2,192

Last active Oct 26
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EIC Builders Ltd

EIC Builders Ltd are here to help customers who need an Extension Builder in Buckinghamshire. We offer a competitive rate to complete all your exte...

From £2,288

Last active Oct 26
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B.A Ruffle Building Contractor

B.A Ruffle Building Contractor is an established extension buildering business in Buckinghamshire. We come highly recommended and provide competiti...

From £2,584

Last active Oct 26
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HAMPTON CONSTRUCTION LTD

HAMPTON CONSTRUCTION LTD are here to help customers who need an Extension Builder in Buckinghamshire. We offer a competitive rate to complete all y...

From £2,112

Last active Aug 26
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TENNORCREST CONSTRUCTION

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

From £2,176

Last active Aug 26
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A Iqbal Construction Ltd

Our building services company A Iqbal Construction Ltd was established in 2018. Since then, we have been helping customers in Slough and the surrou...

From £2,128

Last active Aug 26
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Rai Builders

Experienced extension builder ready to quote for your work. Rai Builders is the best extension builder in Buckinghamshire. No obligation free quote...

RSJ cost in Buckinghamshire

Estimates for install an rsj near Buckinghamshire

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Buckinghamshire it ranges from £2,112 (TENNORCREST CONSTRUCTION based in SL6) to £2,584 (HAMPTON CONSTRUCTION LTD based in SL2).

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


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Estimates for common extension builder jobs in Buckinghamshire;

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...