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Select your affordable BB5 extension builder
Need to find an Extension Builder near you for all your extension buildering work?
D Parker Design & Build provides a local, trusted extens...
WM Brickwork & Pointing are here to help customers who need an Extension Builder in BB5. We offer a competitive rate to complete all your extension...
Darren Gaynor is a trusted extension builder serving customers in BB5 and the surrounding area. Contact us to today to get a competitive quote for ...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Experienced extension builder ready to quote for your work. SMH Joinery & Building is the best extension builder in BB5. No obligation free quotes ...
Need to find an Extension Builder near you for all your extension buildering work?
J. Grimshaw provides a local, trusted extension builderi...
Garage Conversions by Joe Hanlon is a trusted extension builder serving customers in BB5 and the surrounding area. Contact us to today to get a com...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in BB5 it ranges from £1,824 (WM Brickwork & Pointing based in BB1) to £2,136 (Garry Ryan Property Repairs based in BB1).
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 BB5 by posting a job with HaMuch and we will send it to extension builders in BB5.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Accrington | £33 | £244 |
| Install An RSJ near Blackburn | £33 | £247 |
| Install An RSJ near Rawtenstall | £29 | £213 |
| Install An RSJ near Burnley | £29 | £219 |
| Install An RSJ near Darwen | £34 | £255 |
| Install An RSJ near Nelson | £27 | £214 |
| Install An RSJ near Chorley | £30 | £221 |
| Install An RSJ near Bury | £30 | £219 |
| Install An RSJ near Bamber Bridge | £30 | £216 |
| Install An RSJ near Bolton | £31 | £219 |
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 - £17,283

Two storey extension - £87,674

Build a timber frame extension - £25,783

Build a swimming pool - £80,783

Single storey extension - £50,657

Side return extension - £39,057

Install an RSJ - £1,983

Outbuilding - £9,783

Build a Mansard loft conversion - £51,783

Loft conversion - £31,714

Build a kitchen extension - £41,783

Hip to gable loft conversion - £41,783

Granny annexe - £86,783

Garden office - £9,783

Convert a Garage - £15,783

Garage - £18,283

Build a flat roof extension - £21,783

Build a dormer loft conversion - £41,783

Concrete foundations - £6,033

Convert a bungalow loft - £28,783

Convert a basement - £35,057