From £2,288
Hallamshire Paving is an established and experienced local extension builder in DE4. Please contact us for a free, no obligation quote and competit...
From £2,544
Trusted and professional extension builder in DE4. Experienced in all extension buildering work and keeping within budget and on quote. AMB Joinery...
From £2,208
We are a family run business with 20 years experience.
We take great care and attention to the work we carry out and pride ourselves on ...
From £2,192
Need to find an Extension Builder near you for all your extension buildering work?
A B Building Roofing Services provides a local, trusted ...
From £1,200
Honest, reliable, experienced building/civil engineering contractor established in 2001.
From £2,224
JG Design & Build is an established extension buildering business in DE4. We come highly recommended and provide competitive quotes for your work.<...
From £2,056
Relax... you have found a reliable extension builder in DE4. Bennett Damp Proofing & Timber is a friendly and reliable company based in DE4 who con...
From £2,136
Need an Extension Builder in DE4? Patrick David Building Services Limited has been helping local clients (20 mile radius) with their extension buil...
From £2,088
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,112
Need to find an Extension Builder near you for all your extension buildering work?
M F Westwick Construction Ltd provides a local, trusted ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in DE4 it ranges from £1,200 (HUSKINSON CONSTR SRVCS LTD based in NG16) to £2,544 (AMB Joinery & Building Services based in S8).
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 | £34 | £261 |
| Install An RSJ near Belper | £32 | £244 |
| Install An RSJ near Amber Valley | £32 | £244 |
| Install An RSJ near Ripley | £32 | £246 |
| Install An RSJ near Chesterfield | £33 | £257 |
| Install An RSJ near Heanor | £31 | £236 |
| Install An RSJ near Kirkby-in-Ashfield | £34 | £269 |
| Install An RSJ near Ashfield | £34 | £269 |
| Install An RSJ near Dronfield | £33 | £262 |
| Install An RSJ near Sutton-in-Ashfield | £33 | £264 |
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 - £17,405

Two storey extension - £87,857

Build a timber frame extension - £25,905

Build a swimming pool - £80,905

Single storey extension - £53,096

Side return extension - £40,429

Install an RSJ - £2,105

Outbuilding - £9,905

Build a Mansard loft conversion - £51,905

Loft conversion - £32,858

Build a kitchen extension - £41,905

Hip to gable loft conversion - £41,905

Granny annexe - £86,905

Garden office - £9,905

Convert a Garage - £15,905

Garage - £18,405

Build a flat roof extension - £21,905

Build a dormer loft conversion - £41,905

Concrete foundations - £6,155

Convert a bungalow loft - £28,905

Convert a basement - £36,429