From £2,104
Taylormade Conservatories are a local conservatory building company based in Coalville. For 42 years, we have been providing excellent conservatory...
From £1,520
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
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 £2,152
We offer a range of building services that are tailored to meet the specific needs of our clients. Whether you are looking to extend your home, con...
From £2,088
Experienced extension builder ready to quote for your work. J M Lidwell is the best extension builder in De3 9f. No obligation free quotes and many...
From £2,240
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £1,896
Relax... you have found a reliable extension builder in De3 9f. Mac Building Services is a friendly and reliable company based in De3 9f who consid...
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 De3 9f. We come highly recommended and provide competitive quotes for your wor...
From £2,056
Relax... you have found a reliable extension builder in De3 9f. Bennett Damp Proofing & Timber is a friendly and reliable company based in De3 9f w...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in De3 9f it ranges from £1,200 (HUSKINSON CONSTR SRVCS LTD based in NG16) to £2,240 (IH Properties Ltd based in LE67).
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 De3 9f by posting a job with HaMuch and we will send it to extension builders in De3 9f.
"RSJ installation Remove wall between kitchen and utility. Fit 3.4m steel beam Obtain Building Control approval and aign off" - DE3, job posted 01/01/70
"RSJ installation" - DERBY, job posted 07/11/25
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Derby | £30 | £228 |
| Install An RSJ near Amber Valley | £31 | £238 |
| Install An RSJ near Belper | £32 | £244 |
| Install An RSJ near Burton upon Trent | £32 | £255 |
| Install An RSJ near Erewash | £31 | £234 |
| Install An RSJ near Ilkeston | £31 | £236 |
| Install An RSJ near Heanor | £31 | £236 |
| Install An RSJ near Swadlincote | £31 | £248 |
| Install An RSJ near Ripley | £32 | £246 |
| Install An RSJ near Long Eaton | £32 | £249 |
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 - £17,263

Two storey extension - £87,645

Build a timber frame extension - £25,763

Build a swimming pool - £80,763

Single storey extension - £50,264

Side return extension - £38,836

Install an RSJ - £1,963

Outbuilding - £9,763

Build a Mansard loft conversion - £51,763

Loft conversion - £31,530

Build a kitchen extension - £41,763

Hip to gable loft conversion - £41,763

Granny annexe - £86,763

Garden office - £9,763

Convert a Garage - £15,763

Garage - £18,263

Build a flat roof extension - £21,763

Build a dormer loft conversion - £41,763

Concrete foundations - £6,013

Convert a bungalow loft - £28,763

Convert a basement - £34,836