From £2,304
Durham, DH1
RAINTON CONSTRUCTION LTD is an established and experienced local extension builder in Durham. Please contact us for a free, no obligation quote and...
From £3,112
Durham, DH1
Trusted General Builders in Durham From small fixes to full renovations, Radici Construction delivers quality workmanship, clear communication,...
From £1,960
Need an Extension Builder in Durham? K & J Property has been helping local clients (20 mile radius) with their extension buildering jobs for many y...
From £2,200
Relax... you have found a reliable extension builder in Durham. AA Paving is a friendly and reliable company based in Durham who consider no job as...
From £2,032
LJP Roofing are here to help customers who need an Extension Builder in Durham. We offer a competitive rate to complete all your extension builderi...
From £2,032
Experienced extension builder ready to quote for your work. L F BUILDING & JOINERY is the best extension builder in Durham. No obligation free quot...
From £2,264
Croft-Hill Building & Joinery is a trusted extension builder serving customers in Durham and the surrounding area. Contact us to today to get a com...
From £2,008
Trusted and professional extension builder in Durham. Experienced in all extension buildering work and keeping within budget and on quote. DHB Buil...
From £2,112
Need an Extension Builder in Durham? Spacesaver Loft Storage has been helping local clients (20 mile radius) with their extension buildering jobs f...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Durham it ranges from £1,960 (K & J Property based in DH7) to £3,112 (Radici Construction North East Ltd based in DH1).
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 Durham by posting a job with HaMuch and we will send it to extension builders in Durham.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Durham | £47 | £267 |
| Install An RSJ near Chester-le-Street | £35 | £242 |
| Install An RSJ near Spennymoor | £38 | £248 |
| Install An RSJ near Washington | £33 | £254 |
| Install An RSJ near Sunderland | £33 | £251 |
| Install An RSJ near Stanley | £34 | £242 |
| Install An RSJ near Seaham | £35 | £235 |
| Install An RSJ near Bishop Auckland | £39 | £247 |
| Install An RSJ near Peterlee | £36 | £230 |
| Install An RSJ near Newton Aycliffe | £39 | £227 |
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 - £17,549

Two storey extension - £88,073

Build a timber frame extension - £26,049

Build a swimming pool - £81,049

Single storey extension - £55,976

Side return extension - £42,049

Install an RSJ - £2,249

Outbuilding - £10,049

Build a Mansard loft conversion - £52,049

Loft conversion - £34,208

Build a kitchen extension - £42,049

Hip to gable loft conversion - £42,049

Granny annexe - £87,049

Garden office - £10,049

Convert a Garage - £16,049

Garage - £18,549

Build a flat roof extension - £22,049

Build a dormer loft conversion - £42,049

Concrete foundations - £6,299

Convert a bungalow loft - £29,049

Convert a basement - £38,049