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 TS20. Experienced in all extension buildering work and keeping within budget and on quote. D & G Buil...
From £2,304
RAINTON CONSTRUCTION LTD is an established and experienced local extension builder in TS20. Please contact us for a free, no obligation quote and c...
From £1,944
Trusted and professional extension builder in TS20. Experienced in all extension buildering work and keeping within budget and on quote. Empire Bui...
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 TS20. No obligation free...
From £2,008
Trusted and professional extension builder in TS20. Experienced in all extension buildering work and keeping within budget and on quote. DHB Builde...
From £2,032
LJP Roofing are here to help customers who need an Extension Builder in TS20. We offer a competitive rate to complete all your extension buildering...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in TS20 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 TS20 by posting a job with HaMuch and we will send it to extension builders in TS20.
"Removing a structural wall between the kitchen and dining room. We have sent off the structural drawings to building control. We have also specified via 1:10 details a hidden beam detail which sits within the floor void. This would mean cutting the timber joist overhangs and install joist hangers..." - STOCKTON-ON-TEES, job posted 01/01/70
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Stockton-on-Tees | £41 | £228 |
| Install An RSJ near Billingham | £44 | £242 |
| Install An RSJ near Middlesbrough | £43 | £236 |
| Install An RSJ near Thornaby-on-Tees | £42 | £231 |
| Install An RSJ near Ingleby Barwick | £41 | £228 |
| Install An RSJ near Eston | £42 | £241 |
| Install An RSJ near Hartlepool | £40 | £236 |
| Install An RSJ near Redcar & Cleveland | £43 | £254 |
| Install An RSJ near Redcar | £42 | £240 |
| 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 - £17,477

Two storey extension - £87,965

Build a timber frame extension - £25,977

Build a swimming pool - £80,977

Single storey extension - £54,536

Side return extension - £41,239

Install an RSJ - £2,177

Outbuilding - £9,977

Build a Mansard loft conversion - £51,977

Loft conversion - £33,533

Build a kitchen extension - £41,977

Hip to gable loft conversion - £41,977

Granny annexe - £86,977

Garden office - £9,977

Convert a Garage - £15,977

Garage - £18,477

Build a flat roof extension - £21,977

Build a dormer loft conversion - £41,977

Concrete foundations - £6,227

Convert a bungalow loft - £28,977

Convert a basement - £37,239