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 £2,568
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,168
Trusted and professional extension builder in S18. Experienced in all extension buildering work and keeping within budget and on quote. R S Heating...
From £2,592
Peak Roofclean offer an inexpensive way of permanently keeping your roof free of moss, lichens and algae. Not only is it 100% effective but...
From £2,536
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,056
C ROWLEY (SELFBUILD) is an established and experienced local extension builder in S18. Please contact us for a free, no obligation quote and compet...
From £2,272
Need an Extension Builder in S18? Cortworth Millhouse Design & Build has been helping local clients (20 mile radius) with their extension builderin...
From £2,136
Dore Decor are a family run business with over 30 years experience - we offer an extensive range of building services and are able to provide a ful...
From £2,544
Need to find an Extension Builder near you for all your extension buildering work?
JHM Property Services Ltd provides a local, trusted exte...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in S18 it ranges from £1,488 (JON WINDLE CONSTRUCTION based in S17) to £2,592 (Peak Roof Clean based in S42).
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 S18 by posting a job with HaMuch and we will send it to extension builders in S18.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Dronfield | £35 | £288 |
| Install An RSJ near Chesterfield | £33 | £257 |
| Install An RSJ near Sheffield | £34 | £280 |
| Install An RSJ near Rotherham | £33 | £257 |
| Install An RSJ near Wickersley | £33 | £257 |
| Install An RSJ near Worksop | £33 | £265 |
| Install An RSJ near Alfreton | £34 | £261 |
| Install An RSJ near Sutton-in-Ashfield | £33 | £265 |
| Install An RSJ near Mansfield Woodhouse | £33 | £263 |
| Install An RSJ near Kirkby-in-Ashfield | £34 | £270 |
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 - £17,557

Two storey extension - £88,085

Build a timber frame extension - £26,057

Build a swimming pool - £81,057

Single storey extension - £56,136

Side return extension - £42,139

Install an RSJ - £2,257

Outbuilding - £10,057

Build a Mansard loft conversion - £52,057

Loft conversion - £34,283

Build a kitchen extension - £42,057

Hip to gable loft conversion - £42,057

Granny annexe - £87,057

Garden office - £10,057

Convert a Garage - £16,057

Garage - £18,557

Build a flat roof extension - £22,057

Build a dormer loft conversion - £42,057

Concrete foundations - £6,307

Convert a bungalow loft - £29,057

Convert a basement - £38,139