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. 

Need help with a job?

HaMuch is Excellent

Install an RSJ cost in E5

ISE Services

From £2,632

Location

Clapton, E5

Relax... you have found a reliable extension builder in E5. ISE Services is a friendly and reliable company based in E5 who consider no job as too ...

Bspec Ltd

From £2,448

At Building Services Contractors we pride ourselves on an efficient and friendly service, and strive to achieve 100% customer satisfaction.

Ang Lee Projects

From £2,456

Location

London, E5

I am an enthusiastic and effective project manager, willing to flex what I can do to suit you and your project. The best projects are in the planni...

D B Duri Building

From £2,656

D B Duri Building are here to help customers who need an Extension Builder in E5. We offer a competitive rate to complete all your extension builde...

Amastic Roofing Building and Scaffolding Services Ltd

From £2,392

Trusted and professional extension builder in E5. Experienced in all extension buildering work and keeping within budget and on quote. Amastic Roof...

FISKA DESIGN & BUILD

From £2,344

FISKA DESIGN & BUILD are here to help customers who need an Extension Builder in E5. We offer a competitive rate to complete all your extension bui...

Carland Builders Ltd

From £2,392

Carland Builders Ltd are here to help customers who need an Extension Builder in E5. We offer a competitive rate to complete all your extension bui...

Barnaby Reynolds Design.

From £2,304

Experienced extension builder ready to quote for your work. Barnaby Reynolds Design. is the best extension builder in E5. No obligation free quotes...

Carbin Canopy

From £2,520

Relax... you have found a reliable extension builder in E5. Carbin Canopy is a friendly and reliable company based in E5 who consider no job as too...

UCDB Ltd

From £2,536

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

UCDB Ltd provides a local, trusted extension buildering ...

RSJ cost in E5

Estimates for install an rsj near E5

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in E5 it ranges from £2,304 (Barnaby Reynolds Design. based in N16) to £2,656 (D B Duri Building based in E8).

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 E5 by posting a job with HaMuch and we will send it to extension builders in E5.

"RSJ re-installation" - N16, job posted 04/10/25


Get extension builder rates instantly

Estimates for common extension builder jobs in E5;

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...