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 £4,040

Last active Nov 26
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1st & 2nd Fix Vasconstruct

Vas Constructs

RUBBERCOVER™ EPDM Permaroof rubber cover and roof system. Lead flashing. NCTS. Timber Frame Buildings. Refurbish fit out, structural ...

From £2,384

Last active Nov 26
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QA's Pointing and Brick Repair

QA's Pointing Brick Repair

Relax... you have found a reliable extension builder in South Kensington. QA's Pointing and Brick Repair is a friendly and reliable company based i...

From £2,456

Last active Oct 26
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Red Box Maintenance Ltd

Red Box are a Fulham-based building and decorating business who work in West and Southwest London, and who specialise in fine interior renovations,...

From £2,560

Last active Oct 26
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M & A UK Ltd

Relax... you have found a reliable extension builder in South Kensington. M & A UK Ltd is a friendly and reliable company based in South Kensington...

From £2,648

Last active Oct 26
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AJ Wells

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

AJ Wells provides a local, trusted extension buildering ...

From £2,368

Last active Oct 26
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Newpark Construction

Newpark Construction are here to help customers who need an Extension Builder in South Kensington. We offer a competitive rate to complete all your...

From £4,520

Last active Oct 26
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Reid and Co Developments Ltd

Jay Reid

We are a well established buildng firm who have been providing building services and managing of projects now for 25 years. We have all the necessary ...

From £2,520

Last active Sep 26
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D & G Building & Decorating

Experienced extension builder ready to quote for your work. D & G Building & Decorating is the best extension builder in South Kensington. No oblig...

From £2,576

Last active Sep 26
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CK Constructions & Development Ltd

CK Constructions & Development Ltd is a trusted extension builder serving customers in South Kensington and the surrounding area. Contact us to tod...

From £2,648

Last active Sep 26
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London Construction

London Construction is an established and experienced local extension builder in South Kensington. Please contact us for a free, no obligation quot...

RSJ cost in South Kensington

Estimates for install an rsj near South Kensington

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in South Kensington it ranges from £2,368 (Newpark Construction based in W12) to £4,520 (Reid and Co Developments Ltd based in NW8).

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


Estimates for common extension builder jobs in South Kensington;

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...