From £2,096
Derbyshire Bathrooms & Kitchens Ltd is an established and experienced local extension builder in DE22. Please contact us for a free, no obligation ...
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...
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...
From £2,104
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
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...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in DE22 it ranges from £1,944 (The Blackbrook Group based in DE22) to £2,312 (J Pearson Building based in DE24).
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 DE22 by posting a job with HaMuch and we will send it to extension builders in DE22.
"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
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Derby | £29 | £227 |
| Install An RSJ near Amber Valley | £32 | £244 |
| Install An RSJ near Belper | £32 | £244 |
| Install An RSJ near Erewash | £31 | £234 |
| Install An RSJ near Ilkeston | £31 | £236 |
| Install An RSJ near Heanor | £31 | £236 |
| Install An RSJ near Ripley | £32 | £246 |
| Install An RSJ near Long Eaton | £32 | £249 |
| Install An RSJ near Burton upon Trent | £33 | £257 |
| Install An RSJ near Broxtowe | £34 | £240 |
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.

Underpin a building - £17,382

Two storey extension - £87,822

Build a timber frame extension - £25,882

Build a swimming pool - £80,882

Single storey extension - £52,632

Side return extension - £40,168

Install an RSJ - £2,082

Outbuilding - £9,882

Build a Mansard loft conversion - £51,882

Loft conversion - £32,640

Build a kitchen extension - £41,882

Hip to gable loft conversion - £41,882

Granny annexe - £86,882

Garden office - £9,882

Convert a Garage - £15,882

Garage - £18,382

Build a flat roof extension - £21,882

Build a dormer loft conversion - £41,882

Concrete foundations - £6,132

Convert a bungalow loft - £28,882

Convert a basement - £36,168