From £1,672
From £2,416
Burgins Property Solutions Ltd is an established and experienced local extension builder in DE4. Please contact us for a free, no obligation quote ...
From £2,448
Here at AEC Building Services, we've been improving homes for local residential customers in Chesterfield, Derbyshire and surrounding areas since 1...
From £2,224
Camo Bear Construction is a local building contractor based in Wingerworth, Chesterfield. We cover many areas across Derbyshire, South Yorkshire an...
From £2,088
JWM Building Services is a trusted extension builder serving customers in DE4 and the surrounding area. Contact us to today to get a competitive qu...
From £2,136
Trusted and professional extension builder in DE4. Experienced in all extension buildering work and keeping within budget and on quote. Merebrook C...
From £1,672
We are a local building company serving the amber valley area working to a high class o...
From £2,128
Relax... you have found a reliable extension builder in DE4. Palace Roofline Ltd is a friendly and reliable company based in DE4 who consider no jo...
From £1,992
Need to find an Extension Builder near you for all your extension buildering work?
PJ Whitehurst (Building) Ltd provides a local, trusted e...
From £2,472
R.J Building Services is an established extension buildering business in DE4. We come highly recommended and provide competitive quotes for your wo...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in DE4 it ranges from £1,672 (Oakenstone Design Planning Build based in DE4) to £2,472 (R.J Building Services based in S41).
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 DE4 by posting a job with HaMuch and we will send it to extension builders in DE4.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Alfreton | £29 | £221 |
| Install An RSJ near Belper | £28 | £219 |
| Install An RSJ near Amber Valley | £28 | £218 |
| Install An RSJ near Ripley | £28 | £217 |
| Install An RSJ near Chesterfield | £29 | £225 |
| Install An RSJ near Heanor | £27 | £204 |
| Install An RSJ near Kirkby-in-Ashfield | £28 | £230 |
| Install An RSJ near Ashfield | £28 | £230 |
| Install An RSJ near Dronfield | £31 | £253 |
| Install An RSJ near Sutton-in-Ashfield | £28 | £231 |
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 - £17,425

Two storey extension - £87,887

Build a timber frame extension - £25,925

Build a swimming pool - £80,925

Single storey extension - £53,496

Side return extension - £40,654

Install an RSJ - £2,125

Outbuilding - £9,925

Build a Mansard loft conversion - £51,925

Loft conversion - £33,045

Build a kitchen extension - £41,925

Hip to gable loft conversion - £41,925

Granny annexe - £86,925

Garden office - £9,925

Convert a Garage - £15,925

Garage - £18,425

Build a flat roof extension - £21,925

Build a dormer loft conversion - £41,925

Concrete foundations - £6,175

Convert a bungalow loft - £28,925

Convert a basement - £36,654