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 £1,936
Need an Extension Builder in County Durham? Northern Roofline Solutions has been helping local clients (20 mile radius) with their extension builde...
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 £2,264
Croft-Hill Building & Joinery is a trusted extension builder serving customers in County Durham and the surrounding area. Contact us to today to ge...
From £2,240
Need to find an Extension Builder near you for all your extension buildering work?
SBC (BUILDERS) LIMITED provides a local, trusted extensi...
From £2,080
J.collinson is an established and experienced local extension builder in County Durham. Please contact us for a free, no obligation quote and compe...
From £1,960
Need an Extension Builder in County Durham? K & J Property has been helping local clients (20 mile radius) with their extension buildering jobs for...
From £2,200
Relax... you have found a reliable extension builder in County Durham. AA Paving is a friendly and reliable company based in County Durham who cons...
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...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in County Durham it ranges from £1,936 (Northern Roofline Solutions based in DL14) 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 County Durham by posting a job with HaMuch and we will send it to extension builders in County Durham.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Bishop Auckland | £39 | £247 |
| Install An RSJ near Spennymoor | £38 | £248 |
| Install An RSJ near Newton Aycliffe | £39 | £227 |
| Install An RSJ near Durham | £47 | £267 |
| Install An RSJ near Darlington | £60 | £222 |
| Install An RSJ near Consett | £33 | £241 |
| Install An RSJ near Stanley | £34 | £242 |
| Install An RSJ near Chester-le-Street | £35 | £242 |
| Install An RSJ near Peterlee | £35 | £222 |
| Install An RSJ near Washington | £33 | £251 |
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 - £17,448

Two storey extension - £87,922

Build a timber frame extension - £25,948

Build a swimming pool - £80,948

Single storey extension - £53,960

Side return extension - £40,915

Install an RSJ - £2,148

Outbuilding - £9,948

Build a Mansard loft conversion - £51,948

Loft conversion - £33,263

Build a kitchen extension - £41,948

Hip to gable loft conversion - £41,948

Granny annexe - £86,948

Garden office - £9,948

Convert a Garage - £15,948

Garage - £18,448

Build a flat roof extension - £21,948

Build a dormer loft conversion - £41,948

Concrete foundations - £6,198

Convert a bungalow loft - £28,948

Convert a basement - £36,915