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 £2,168
Relax... you have found a reliable extension builder in S40. CS Construction & Conversions is a friendly and reliable company based in S40 who cons...
From £1,200
Honest, reliable, experienced building/civil engineering contractor established in 2001.
From £1,960
RMS Building Services is a trusted extension builder serving customers in S40 and the surrounding area. Contact us to today to get a competitive qu...
From £2,136
Trusted and professional extension builder in S40. Experienced in all extension buildering work and keeping within budget and on quote. Merebrook C...
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 £2,312
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,544
Trusted and professional extension builder in S40. Experienced in all extension buildering work and keeping within budget and on quote. AMB Joinery...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in S40 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 S40 by posting a job with HaMuch and we will send it to extension builders in S40.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Chesterfield | £33 | £257 |
| Install An RSJ near Dronfield | £33 | £262 |
| Install An RSJ near Alfreton | £34 | £261 |
| Install An RSJ near Sheffield | £32 | £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 |
| Install An RSJ near Ashfield | £34 | £270 |
| Install An RSJ near Mansfield | £33 | £262 |
| Install An RSJ near Worksop | £33 | £265 |
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 - £17,334

Two storey extension - £87,752

Build a timber frame extension - £25,834

Build a swimming pool - £80,834

Single storey extension - £51,688

Side return extension - £39,637

Install an RSJ - £2,034

Outbuilding - £9,834

Build a Mansard loft conversion - £51,834

Loft conversion - £32,198

Build a kitchen extension - £41,834

Hip to gable loft conversion - £41,834

Granny annexe - £86,834

Garden office - £9,834

Convert a Garage - £15,834

Garage - £18,334

Build a flat roof extension - £21,834

Build a dormer loft conversion - £41,834

Concrete foundations - £6,084

Convert a bungalow loft - £28,834

Convert a basement - £35,637