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. 

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Install an RSJ cost in TW9

Demre Home Refurbishment

From £2,200

Location

Surrey, TW9

We provide ‘end-to-end’ design and build services for Loft conversions, Home extension, Kitchen and Bathroom renovations. Our bespoke Design & ...

11th Hour Construction Group

From £2,504

11th Hour Construction Group are here to help customers who need an Extension Builder in TW9. We offer a competitive rate to complete all your exte...

West 1 Construction

From £2,352

Location

Greater London, TW9

Relax... you have found a reliable extension builder in TW9. West 1 Construction is a friendly and reliable company based in TW9 who consider no jo...

The Bespoke Building Company

From £2,360

Experienced extension builder ready to quote for your work. The Bespoke Building Company is the best extension builder in TW9. No obligation free q...

Edmond & Tann Builders

From £2,296

Need an Extension Builder in TW9? Edmond & Tann Builders has been helping local clients (10 mile radius) with their extension buildering jobs for m...

London Urban - Intelligent Construction

From £2,280

London Urban - Intelligent Construction is a trusted extension builder serving customers in TW9 and the surrounding area. Contact us to today to ge...

FL Construction London

From £2,336

Location

Surrey, TW9

FL Construction London is an established and experienced local extension builder in TW9. Please contact us for a free, no obligation quote and comp...

Embury Building Services Ltd

From £2,168

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

Embury Building Services Ltd provides a local, trusted e...

Renovations, Building, Servicing and Maintenance

From £2,112

Location

Greater London, TW9

Renovations, Building, Servicing and Maintenance is an established extension buildering business in TW9. We come highly recommended and provide com...

Pro Construction London Ltd

From £2,320

Pro Construction London Ltd is more than an ordinary Refurbishment and Building Contractor. We are a building contractor with long experience and 1...

RSJ cost in TW9

Estimates for install an rsj near TW9

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in TW9 it ranges from £2,112 (Renovations, Building, Servicing and Maintenance based in TW9) to £2,504 (11th Hour Construction Group based in TW9).

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 TW9 by posting a job with HaMuch and we will send it to extension builders in TW9.

"UC beam install 2.5m only (calculations done, building control notification done, no pretty boxing etc.)" - TW8, job posted 03/09/26


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Estimates for common extension builder jobs in TW9;

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.

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