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 £1,816

Last active Sep 26
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Max Sandford & San

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

Max Sandford & San provides a local, trusted extension b...

From £1,776

Last active Sep 26
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G.I Davies & Son

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

G.I Davies & Son provides a local, trusted extension bui...

From £1,824

Last active Sep 26
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D.A Fisher General Builders

D.A Fisher General Builders is an established and experienced local extension builder in Carmarthenshire. Please contact us for a free, no obligati...

From £1,936

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F & E Construction

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

From £2,136

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N Morgans & Son Ltd

Nigel Morgans

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

N Morgans & Son Ltd provides a local, trusted extension ...

RSJ cost in Carmarthenshire

Estimates for install an rsj near Carmarthenshire

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Carmarthenshire it ranges from £1,776 (G.I Davies & Son based in SA32) to £2,136 (N Morgans & Son Ltd based in SA33).

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


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Estimates for common extension builder jobs in Carmarthenshire;

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...