On time/ professional/ time served/trustworthy
Need to find an Extension Builder near you for all your extension buildering work?
TK Builders provides a local, trusted extension builderi...
MM Building Services is an established and experienced local extension builder in SR3. Please contact us for a free, no obligation quote and compet...
Albert Radici
Trusted General Builders in Durham From small fixes to full renovations, Radici Construction delivers quality workmanship, clear communication,...
Tom Turner
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
"Totally unreliable, takes your money and doesn't finish the job." - NORTH EAST,reviewed 04/10/17, L S
Relax... you have found a reliable extension builder in SR3. AA Paving is a friendly and reliable company based in SR3 who consider no job as too b...
RAINTON CONSTRUCTION LTD is an established and experienced local extension builder in SR3. Please contact us for a free, no obligation quote and co...
ANDREW HUNTER BUILDING SERVICES is an established and experienced local extension builder in SR3. Please contact us for a free, no obligation quote...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in SR3 it ranges from £2,008 (ANDREW HUNTER BUILDING SERVICES based in NE15) 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 SR3 by posting a job with HaMuch and we will send it to extension builders in SR3.
"RSJ installation" - SUNDERLAND, job posted 01/01/70
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Sunderland | £33 | £251 |
| Install An RSJ near Seaham | £35 | £235 |
| Install An RSJ near Washington | £33 | £254 |
| Install An RSJ near South Tyneside | £34 | £261 |
| Install An RSJ near Jarrow | £34 | £262 |
| Install An RSJ near Chester-le-Street | £35 | £242 |
| Install An RSJ near Hebburn | £34 | £246 |
| Install An RSJ near South Shields | £36 | £257 |
| Install An RSJ near Peterlee | £36 | £230 |
| Install An RSJ near Durham | £47 | £267 |
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 - £17,624

Two storey extension - £88,186

Build a timber frame extension - £26,124

Build a swimming pool - £81,124

Single storey extension - £57,480

Side return extension - £42,895

Install an RSJ - £2,324

Outbuilding - £10,124

Build a Mansard loft conversion - £52,124

Loft conversion - £34,913

Build a kitchen extension - £42,124

Hip to gable loft conversion - £42,124

Granny annexe - £87,124

Garden office - £10,124

Convert a Garage - £16,124

Garage - £18,624

Build a flat roof extension - £22,124

Build a dormer loft conversion - £42,124

Concrete foundations - £6,374

Convert a bungalow loft - £29,124

Convert a basement - £38,895