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 £2,024

Last active Nov 26
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ATLAS BUILDING AND MAINT

ATLAS BUILDING AND MAINT are here to help customers who need an Extension Builder in BN21. We offer a competitive rate to complete all your extensi...

From £2,440

Last active Nov 26
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CG Renovations Ltd

Experienced extension builder ready to quote for your work. CG Renovations Ltd is the best extension builder in BN21. No obligation free quotes and...

From £2,304

Last active Nov 26
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Templar Developments Ltd

Russell Channnon

At Templar Developments we work with our clients from thought to finish all the while keeping quality 110%. We cover all your construction needs on...

From £2,056

Last active Nov 26
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Heymann Builders Ltd

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

Heymann Builders Ltd provides a local, trusted extension...

From £2,232

Last active Mar 26
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Gem Construction (Sussex) Ltd

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

Gem Construction (Sussex) Ltd provides a local, trusted ...

From £2,120

Last active Mar 26
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Technique Roofing and Maintenance

Technique Roofing and Maintenance are here to help customers who need an Extension Builder in BN21. We offer a competitive rate to complete all you...

From £1,680

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Pro For You

Krzysztof Jankowski

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

From £2,016

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Razvan Building Services Ltd

Experienced extension builder ready to quote for your work. Razvan Building Services Ltd is the best extension builder in BN21. No obligation free ...

From £2,448

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GREEN ROOM CONSTRUCTION

GREEN ROOM CONSTRUCTION is an established and experienced local extension builder in BN21. Please contact us for a free, no obligation quote and co...

From £2,008

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DINNAGE BUILDERS

Richard Dinnage

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

DINNAGE BUILDERS provides a local, trusted extension bui...

RSJ cost in BN21

Estimates for install an rsj near BN21

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in BN21 it ranges from £1,680 (Pro For You based in BN22) to £2,448 (GREEN ROOM CONSTRUCTION based in BN22).

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 BN21 by posting a job with HaMuch and we will send it to extension builders in BN21.


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Estimates for common extension builder jobs in BN21;

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...