Trusted and professional extension builder in DL3. Experienced in all extension buildering work and keeping within budget and on quote. D & G Build...
From £2,408
Experienced extension builder ready to quote for your work. pidesigns is the best extension builder in DL3. No obligation free quotes and many happ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in DL3 it ranges from £1,960 (D & G Builders based in DL3) to £2,408 (Pidesigns based in DL1).
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 DL3 by posting a job with HaMuch and we will send it to extension builders in DL3.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Darlington | £60 | £222 |
| Install An RSJ near Newton Aycliffe | £38 | £225 |
| Install An RSJ near Stockton-on-Tees | £41 | £228 |
| Install An RSJ near Bishop Auckland | £38 | £248 |
| Install An RSJ near Ingleby Barwick | £41 | £228 |
| Install An RSJ near Thornaby-on-Tees | £42 | £231 |
| Install An RSJ near Spennymoor | £37 | £249 |
| Install An RSJ near Billingham | £44 | £242 |
| Install An RSJ near Middlesbrough | £43 | £236 |
| Install An RSJ near Eston | £42 | £241 |
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 - £17,484

Two storey extension - £87,976

Build a timber frame extension - £25,984

Build a swimming pool - £80,984

Single storey extension - £54,680

Side return extension - £41,320

Install an RSJ - £2,184

Outbuilding - £9,984

Build a Mansard loft conversion - £51,984

Loft conversion - £33,600

Build a kitchen extension - £41,984

Hip to gable loft conversion - £41,984

Granny annexe - £86,984

Garden office - £9,984

Convert a Garage - £15,984

Garage - £18,484

Build a flat roof extension - £21,984

Build a dormer loft conversion - £41,984

Concrete foundations - £6,234

Convert a bungalow loft - £28,984

Convert a basement - £37,320