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 DE21

Fitted Solutions Ltd

From £1,952

Fitted Solutions was established in 2006 by founder Sam Fisher; with a promise to deliver exceptional craftmanship combined with first class custom...

Flying Tortise

From £2,016

Relax... you have found a reliable extension builder in DE21. Flying Tortise is a friendly and reliable company based in DE21 who consider no job a...

Fearn Property

From £2,104

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

BRICKON CONSTRUCTION LIMITED

From £2,000

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

BRICKON CONSTRUCTION LIMITED provides a local, trusted e...

A J Construction

From £1,904

A J Construction is an established and experienced local extension builder in DE21. Please contact us for a free, no obligation quote and competiti...

J Pearson Building

From £2,312

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

J Pearson Building provides a local, trusted extension b...

Refresh Renovations Derbyshire

From £2,064

Nestled in the rolling hillside of the West Midlands, Derby is a city birthed by the Roman Empire, and grown in the industrial revolution. Initiall...

Rowes Building Ltd

From £2,352

Experienced extension builder ready to quote for your work. Rowes Building Ltd is the best extension builder in DE21. No obligation free quotes and...

The Blackbrook Group

From £1,944

The Blackbrook Group offers a one-stop shop for your construction project. We offer support from concept through to completion. We start with an in...

Seerey and Smith Building Solutions

From £2,464

Trusted and professional extension builder in DE21. Experienced in all extension buildering work and keeping within budget and on quote. Seerey and...

RSJ cost in DE21

Estimates for install an rsj near DE21

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in DE21 it ranges from £1,904 (A J Construction based in DE22) to £2,464 (Seerey and Smith Building Solutions based in DE7).

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 DE21 by posting a job with HaMuch and we will send it to extension builders in DE21.

"RSJ installation" - DERBY, job posted 07/11/25

"RSJ installation Remove wall between kitchen and utility. Fit 3.4m steel beam Obtain Building Control approval and aign off" - DE3, job posted 01/01/70


Get extension builder rates instantly

Get extension builder rates instantly (excluding VAT or callout charges)
Location in UKHourly RateDaily Rate
Install An RSJ near Derby£30£228
Install An RSJ near Erewash£31£233
Install An RSJ near Ilkeston£31£235
Install An RSJ near Amber Valley£31£238
Install An RSJ near Belper£32£244
Install An RSJ near Heanor£31£236
Install An RSJ near Long Eaton£32£248
Install An RSJ near Ripley£32£246
Install An RSJ near Broxtowe£33£240
Install An RSJ near Nottingham£34£241

Estimates for common extension builder jobs in DE21;

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...