From £2,120
Graham Gamble is an established and experienced local extension builder in Whitby. Please contact us for a free, no obligation quote and competitiv...
From £2,328
Need an Extension Builder in Whitby? Holvey Home Improvements has been helping local clients (20 mile radius) with their extension buildering jobs ...
From £1,984
Plant to Build Northern is an established and experienced local extension builder in Whitby. Please contact us for a free, no obligation quote and ...
From £1,640
Trusted and professional extension builder in Whitby. Experienced in all extension buildering work and keeping within budget and on quote. Marshall...
From £2,064
Whitby, YO21
Need to find an Extension Builder near you for all your extension buildering work?
MARK STRINGER BUILDING LIMITED provides a local, trusted...
From £2,120
Need to find an Extension Builder near you for all your extension buildering work?
louisjh provides a local, trusted extension buildering s...
From £2,384
Over a Decade of Property Maintenance. Military Maintenance has years of experience in the construction and development industry, our expertise ran...
From £2,176
Need an Extension Builder in Whitby? M&K BEDROOM DESIGNS has been helping local clients (20 mile radius) with their extension buildering jobs for m...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Whitby it ranges from £1,640 (Marshall & Son Builders based in TS14) to £2,384 (Military Maintenance Ltd based in ts10).
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 Whitby by posting a job with HaMuch and we will send it to extension builders in Whitby.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Redcar | £42 | £240 |
| Install An RSJ near Redcar & Cleveland | £43 | £254 |
| Install An RSJ near Scarborough | £29 | £234 |
| Install An RSJ near Eston | £42 | £241 |
| 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 Billingham | £44 | £242 |
| Install An RSJ near Hartlepool | £40 | £236 |
| Install An RSJ near Stockton-on-Tees | £41 | £228 |
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 - £17,402

Two storey extension - £87,853

Build a timber frame extension - £25,902

Build a swimming pool - £80,902

Single storey extension - £53,040

Side return extension - £40,398

Install an RSJ - £2,102

Outbuilding - £9,902

Build a Mansard loft conversion - £51,902

Loft conversion - £32,831

Build a kitchen extension - £41,902

Hip to gable loft conversion - £41,902

Granny annexe - £86,902

Garden office - £9,902

Convert a Garage - £15,902

Garage - £18,402

Build a flat roof extension - £21,902

Build a dormer loft conversion - £41,902

Concrete foundations - £6,152

Convert a bungalow loft - £28,902

Convert a basement - £36,398