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 £2,048

Last active Nov 26
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R&J Building Services Ltd

Need an Extension Builder in North Hertfordshire? R&J Building Services Ltd has been helping local clients (20 mile radius) with their extension bu...

From £2,584

Last active Nov 26
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HB Construction

Experienced extension builder ready to quote for your work. HB Construction is the best extension builder in North Hertfordshire. No obligation fre...

From £2,216

Last active Oct 26
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FULLERS BUILDING SERVICES

Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

From £2,344

Last active Jul 26
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Amcell Renovations

Trusted and professional extension builder in North Hertfordshire. Experienced in all extension buildering work and keeping within budget and on qu...

From £2,120

Last active Jul 26
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MA Gower

Need an Extension Builder in North Hertfordshire? MA Gower has been helping local clients (20 mile radius) with their extension buildering jobs for...

From £2,408

Last active Jul 26
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WILLMOTT DIXON CONSTRUCTION LI

Need an Extension Builder in North Hertfordshire? WILLMOTT DIXON CONSTRUCTION LI has been helping local clients (20 mile radius) with their extensi...

From £2,392

Last active May 26
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Red Swan Construction

In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...

From £2,216

Last active Apr 26
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G B BUILDSTORE LTD

Gary Braine

Experienced extension builder ready to quote for your work. G B BUILDSTORE LTD is the best extension builder in North Hertfordshire. No obligation ...

From £2,344

Last active Apr 26
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TPJ Building Ltd

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

TPJ Building Ltd provides a local, trusted extension bui...

From £2,688

Last active Apr 26
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M SPINDLER CONSTRUCTION LTD

Need an Extension Builder in North Hertfordshire? M SPINDLER CONSTRUCTION LTD has been helping local clients (20 mile radius) with their extension ...

RSJ cost in North Hertfordshire

Estimates for install an rsj near North Hertfordshire

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in North Hertfordshire it ranges from £2,048 (R&J Building Services Ltd based in SG17) to £2,688 (M SPINDLER CONSTRUCTION LTD based in SG6).

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


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Estimates for common extension builder jobs in North Hertfordshire;

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...