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 £2,216

Last active Sep 26
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M Davies & Sons

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

From £2,248

Last active May 26
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Guest & Roberts

Experienced extension builder ready to quote for your work. Guest & Roberts is the best extension builder in LL12. No obligation free quotes and ma...

From £2,784

Last active Apr 26
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David Williams General Builder & Maintenance

Relax... you have found a reliable extension builder in LL12. David Williams General Builder & Maintenance is a friendly and reliable company based...

From £2,216

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READ CONSTRUCTION HOLDINGS LTD

Experienced extension builder ready to quote for your work. READ CONSTRUCTION HOLDINGS LTD is the best extension builder in LL12. No obligation fre...

RSJ cost in LL12

Estimates for install an rsj near LL12

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in LL12 it ranges from £2,216 (M Davies & Sons based in LL11) to £2,784 (David Williams General Builder & Maintenance based in LL11).

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 LL12 by posting a job with HaMuch and we will send it to extension builders in LL12.


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Estimates for common extension builder jobs in LL12;

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...