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. 

HaMuch is Excellent

Install an RSJ cost in SS1

Ottley Lofts Ltd

From £2,192

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

JLS Building Services Ltd

From £2,464

JLS Building Services was established in 2004, the company has many years of experience.JLS pride ourselves on giving 100% custome...

JLS Building Services

From £1,920

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

JLS Building Services provides a local, trusted extensio...

L C P Carpentry

From £2,000

Relax... you have found a reliable extension builder in SS1. L C P Carpentry is a friendly and reliable company based in SS1 who consider no job as...

MWS Property Services

From £2,200

I have been in this industry for over 22 years and for the last fifteen years I have been getting a large percentage of my work through Which? Trus...

M&M Builders

From £2,064

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

M&M Builders provides a local, trusted extension builder...

Fine Build Homes Ltd

From £2,304

Fine Build Homes Ltd are here to help customers who need an Extension Builder in SS1. We offer a competitive rate to complete all your extension bu...

House Q Ltd

From £2,352

Experienced extension builder ready to quote for your work. House Q Ltd is the best extension builder in SS1. No obligation free quotes and many ha...

A Dead Short Ltd

From £2,024

I'm only as good as my last job .

Wrights Building Services

From £2,368

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

Wrights Building Services provides a local, trusted exte...

RSJ cost in SS1

Estimates for install an rsj near SS1

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in SS1 it ranges from £1,920 (JLS Building Services based in SS1) to £2,464 (JLS Building Services Ltd based in SS1).

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 SS1 by posting a job with HaMuch and we will send it to extension builders in SS1.


Get extension builder rates instantly

Estimates for common extension builder jobs in SS1;

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...