From £2,096
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
2 reviews
From £2,464
30 years experience In building . Plastering and colour renders
"Totally unreliable, takes your money and doesn't finish the job." - NORTH EAST,reviewed 04/10/17, L S
From £1,960
Trusted and professional extension builder in DL1. Experienced in all extension buildering work and keeping within budget and on quote. D & G Build...
From £2,304
RAINTON CONSTRUCTION LTD is an established and experienced local extension builder in DL1. Please contact us for a free, no obligation quote and co...
From £1,944
Trusted and professional extension builder in DL1. Experienced in all extension buildering work and keeping within budget and on quote. Empire Buil...
From £3,112
Trusted General Builders in Durham From small fixes to full renovations, Radici Construction delivers quality workmanship, clear communication,...
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 £1,728
Experienced extension builder ready to quote for your work. KIETH GRAY ROOFING & BUILDING is the best extension builder in DL1. No obligation free ...
From £2,008
Trusted and professional extension builder in DL1. Experienced in all extension buildering work and keeping within budget and on quote. DHB Builder...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in DL1 it ranges from £1,728 (KIETH GRAY ROOFING & BUILDING based in TS24) 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 DL1 by posting a job with HaMuch and we will send it to extension builders in DL1.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Darlington | £60 | £222 |
| Install An RSJ near Newton Aycliffe | £39 | £227 |
| Install An RSJ near Stockton-on-Tees | £41 | £228 |
| Install An RSJ near Ingleby Barwick | £41 | £228 |
| Install An RSJ near Thornaby-on-Tees | £42 | £231 |
| Install An RSJ near Bishop Auckland | £39 | £247 |
| Install An RSJ near Billingham | £44 | £242 |
| Install An RSJ near Spennymoor | £38 | £248 |
| 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 - £17,494

Two storey extension - £87,990

Build a timber frame extension - £25,994

Build a swimming pool - £80,994

Single storey extension - £54,872

Side return extension - £41,428

Install an RSJ - £2,194

Outbuilding - £9,994

Build a Mansard loft conversion - £51,994

Loft conversion - £33,690

Build a kitchen extension - £41,994

Hip to gable loft conversion - £41,994

Granny annexe - £86,994

Garden office - £9,994

Convert a Garage - £15,994

Garage - £18,494

Build a flat roof extension - £21,994

Build a dormer loft conversion - £41,994

Concrete foundations - £6,244

Convert a bungalow loft - £28,994

Convert a basement - £37,428