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 Get quotes.

HaMuch is Excellent

Install an RSJ cost in WA11 - Sort by rates or availability

From £1,864

(last active 08/10/26)
Get quotes

KMC Brickwork

Need an Extension Builder in WA11? KMC Brickwork has been helping local clients (20 mile radius) with their extension buildering jobs for many year...

From £1,808

(last active 11/06/26)
Get quotes

M L R Building Services

Mark Robinson

Trusted and professional extension builder in WA11. Experienced in all extension buildering work and keeping within budget and on quote. M L R Buil...

From £2,000

(last active 11/06/26)
Get quotes

Higher End Construction Limited

Higher End Construction Limited is an established extension buildering business in WA11. We come highly recommended and provide competitive quotes ...

From £2,072

(last active 11/06/26)
Get quotes

G. Finnigan Builders

G. Finnigan Builders is an established extension buildering business in WA11. We come highly recommended and provide competitive quotes for your wo...

From £2,232

(last active 16/03/26)
Get quotes

Allan Rowe Property Services

Hello, I am Allan. I have run Allan Rowe Property Services since September 2014. I am based in Newton Le Willows and provide a wide range of proper...

From £1,424

Get quotes

MJ Barker & Son

MJ Barker & Son is an established extension buildering business in WA11. We come highly recommended and provide competitive quotes for your work.

RSJ cost in WA11

Estimates for install an rsj near WA11

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in WA11 it ranges from £1,424 (MJ Barker & Son based in WA11) to £2,232 (Allan Rowe Property Services based in WA12).

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 WA11 by posting a job with HaMuch and we will send it to extension builders in WA11.


Get extension builder rates instantly

Estimates for common extension builder jobs in WA11;

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...