From £2,048
Need to find an Extension Builder near you for all your extension buildering work?
ANWEN CONSTRUCTION provides a local, trusted extension b...
From £2,024
Experienced extension builder ready to quote for your work. AW Building Projects North East Ltd is the best extension builder in DL5. No obligation...
From £2,120
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £1,936
Need an Extension Builder in DL5? Northern Roofline Solutions has been helping local clients (20 mile radius) with their extension buildering jobs ...
From £1,960
Trusted and professional extension builder in DL5. Experienced in all extension buildering work and keeping within budget and on quote. D & G Build...
From £2,168
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,408
Experienced extension builder ready to quote for your work. pidesigns is the best extension builder in DL5. No obligation free quotes and many happ...
From £1,832
Partek Site Services is an established and experienced local extension builder in DL5. Please contact us for a free, no obligation quote and compet...
From £2,264
Croft-Hill Building & Joinery is a trusted extension builder serving customers in DL5 and the surrounding area. Contact us to today to get a compet...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in DL5 it ranges from £1,832 (Partek Site Services based in DL2) to £2,464 (Heritage NE Ltd based in DL17).
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 DL5 by posting a job with HaMuch and we will send it to extension builders in DL5.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Newton Aycliffe | £39 | £227 |
| Install An RSJ near Bishop Auckland | £39 | £247 |
| Install An RSJ near Spennymoor | £38 | £248 |
| Install An RSJ near Darlington | £60 | £222 |
| Install An RSJ near Stockton-on-Tees | £40 | £226 |
| Install An RSJ near Durham | £47 | £267 |
| Install An RSJ near Billingham | £43 | £240 |
| Install An RSJ near Thornaby-on-Tees | £41 | £230 |
| Install An RSJ near Ingleby Barwick | £41 | £227 |
| Install An RSJ near Middlesbrough | £42 | £235 |
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 - £17,422

Two storey extension - £87,884

Build a timber frame extension - £25,922

Build a swimming pool - £80,922

Single storey extension - £53,448

Side return extension - £40,627

Install an RSJ - £2,122

Outbuilding - £9,922

Build a Mansard loft conversion - £51,922

Loft conversion - £33,023

Build a kitchen extension - £41,922

Hip to gable loft conversion - £41,922

Granny annexe - £86,922

Garden office - £9,922

Convert a Garage - £15,922

Garage - £18,422

Build a flat roof extension - £21,922

Build a dormer loft conversion - £41,922

Concrete foundations - £6,172

Convert a bungalow loft - £28,922

Convert a basement - £36,627