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 £1,760

Last active Nov 26
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TR1 Construction Ltd

TR1 Construction Ltd is a one-stop solution for all your extension buildering needs. Establish over 10 years ago and covering 20 miles around St Ag...

From £2,104

Last active Nov 26
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Peninsula Property Refurbishments

Dave Paull

At peninsula refurbishment we provide a service from start to finish with minimal hassle for the customer. The workmanship is always high priority,...

From £1,728

Last active Sep 26
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D & S Builders

Trusted and professional extension builder in St Agnes. Experienced in all extension buildering work and keeping within budget and on quote. D & S ...

From £1,744

Last active Apr 26
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KEAST CONSTRUCTION LTD

Experienced extension builder ready to quote for your work. KEAST CONSTRUCTION LTD is the best extension builder in St Agnes. No obligation free qu...

From £1,832

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J C MITCHELL BUILDERS LTD

J C MITCHELL BUILDERS LTD is a trusted extension builder serving customers in St Agnes and the surrounding area. Contact us to today to get a compe...

From £1,984

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KPK Builders Ltd

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

KPK Builders Ltd provides a local, trusted extension bui...

From £1,904

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Cannon and Son Ltd.

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

From £1,904

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Cannon and Son Ltd.

From start to finish, your project will be undertaken by one of the family, providing the utmost care and quality of workmanship. We’ll work with...

From £2,016

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Rock Construction

Rock Construction is a trusted extension builder serving customers in St Agnes and the surrounding area. Contact us to today to get a competitive q...

From £1,872

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A Collins Building Contractor

A Collins Building Contractor is a trusted extension builder serving customers in St Agnes and the surrounding area. Contact us to today to get a c...

RSJ cost in St Agnes

Estimates for install an rsj near St Agnes

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in St Agnes it ranges from £1,728 (D & S Builders based in TR15) to £2,104 (Peninsula Property Refurbishments based in TR15).

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


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Get extension builder rates instantly (excluding VAT or callout charges)
Location in UKHourly RateDaily Rate
Install An RSJ near Truro£31£206
Install An RSJ near Camborne£28£196
Install An RSJ near Newquay£32£230
Install An RSJ near Falmouth£33£220
Install An RSJ near St Ives, Cornwall£27£188
Install An RSJ near St Austell£38£245

Estimates for common extension builder jobs in St Agnes;

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...