Paul Mccreadie
1980 are here to help customers who need an Extension Builder in DN3. We offer a competitive rate to complete all your extension buildering jobs to...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
At Northfield General Builders Ltd we pride ourselves on being the go-to bathroom fitters for discerning customers in the Doncaster area.At...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in DN3 it ranges from £1,864 (1980 based in DN2) to £2,416 (Northfield General Builders Ltd based in DN2).
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 DN3 by posting a job with HaMuch and we will send it to extension builders in DN3.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Doncaster | £29 | £238 |
| Install An RSJ near Goole | £26 | £217 |
| Install An RSJ near Wickersley | £32 | £258 |
| Install An RSJ near Pontefract | £30 | £228 |
| Install An RSJ near Bassetlaw | £31 | £243 |
| Install An RSJ near Rotherham | £32 | £257 |
| Install An RSJ near Gainsborough | £30 | £234 |
| Install An RSJ near Retford | £31 | £243 |
| Install An RSJ near Selby | £30 | £240 |
| Install An RSJ near Castleford | £30 | £225 |
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 - £17,508

Two storey extension - £88,012

Build a timber frame extension - £26,008

Build a swimming pool - £81,008

Single storey extension - £55,160

Side return extension - £41,590

Install an RSJ - £2,208

Outbuilding - £10,008

Build a Mansard loft conversion - £52,008

Loft conversion - £33,825

Build a kitchen extension - £42,008

Hip to gable loft conversion - £42,008

Granny annexe - £87,008

Garden office - £10,008

Convert a Garage - £16,008

Garage - £18,508

Build a flat roof extension - £22,008

Build a dormer loft conversion - £42,008

Concrete foundations - £6,258

Convert a bungalow loft - £29,008

Convert a basement - £37,590