From £2,152
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £1,200
Honest, reliable, experienced building/civil engineering contractor established in 2001.
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 ...
From £1,960
RMS Building Services is a trusted extension builder serving customers in Osmaston and the surrounding area. Contact us to today to get a competiti...
From £2,136
Trusted and professional extension builder in Osmaston. Experienced in all extension buildering work and keeping within budget and on quote. Merebr...
From £3,128
Trusted and professional extension builder in Osmaston. Experienced in all extension buildering work and keeping within budget and on quote. COMPLE...
From £1,952
Relax... you have found a reliable extension builder in Osmaston. MTD Brickwork Ltd is a friendly and reliable company based in Osmaston who consid...
From £2,496
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £1,672
We are a local building company serving the amber valley area working to a high class o...
From £4,280
Acorn Builders is an established extension buildering business in Osmaston. We come highly recommended and provide competitive quotes for your wor...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Osmaston it ranges from £1,200 (HUSKINSON CONSTR SRVCS LTD based in NG16) to £4,280 (Acorn Builders based in NG17).
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 Osmaston by posting a job with HaMuch and we will send it to extension builders in Osmaston.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Amber Valley | £31 | £238 |
| Install An RSJ near Belper | £32 | £244 |
| Install An RSJ near Derby | £30 | £228 |
| Install An RSJ near Burton upon Trent | £32 | £255 |
| Install An RSJ near Ripley | £32 | £246 |
| Install An RSJ near Leek | £33 | £254 |
| Install An RSJ near Heanor | £31 | £236 |
| Install An RSJ near Alfreton | £34 | £261 |
| Install An RSJ near Ilkeston | £31 | £236 |
| Install An RSJ near Swadlincote | £31 | £248 |
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 - £17,609

Two storey extension - £88,163

Build a timber frame extension - £26,109

Build a swimming pool - £81,109

Single storey extension - £57,176

Side return extension - £42,724

Install an RSJ - £2,309

Outbuilding - £10,109

Build a Mansard loft conversion - £52,109

Loft conversion - £34,770

Build a kitchen extension - £42,109

Hip to gable loft conversion - £42,109

Granny annexe - £87,109

Garden office - £10,109

Convert a Garage - £16,109

Garage - £18,609

Build a flat roof extension - £22,109

Build a dormer loft conversion - £42,109

Concrete foundations - £6,359

Convert a bungalow loft - £29,109

Convert a basement - £38,724