Paul Foran
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Sasho Mitev
Hello So we do not work and almost any work and it works very well and qualitatively If you are interested we can work in the future
Need to find an Extension Builder near you for all your extension buildering work?
DC Contractors provides a local, trusted extension build...
Relax... you have found a reliable extension builder in BB1. David Anderson Builders is a friendly and reliable company based in BB1 who consider n...
Jonathan
Need to find an Extension Builder near you for all your extension buildering work?
ESBP Specialists Ltd provides a local, trusted extension...
Need an Extension Builder in BB1? MK Builders has been helping local clients (20 mile radius) with their extension buildering jobs for many years. ...
Need to find an Extension Builder near you for all your extension buildering work?
J & C Barker (Builders) Limited provides a local, truste...
Amak Construction is an established and experienced local extension builder in BB1. Please contact us for a free, no obligation quote and competiti...
Wallplas is an established extension buildering business in BB1. We come highly recommended and provide competitive quotes for your work.
WWS Garage Doors & Shutters is a trusted extension builder serving customers in BB1 and the surrounding area. Contact us to today to get a competit...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in BB1 it ranges from £1,160 (Aquatec Builder based in OL10) to £2,160 (ESBP Specialists Ltd based in M26).
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 BB1 by posting a job with HaMuch and we will send it to extension builders in BB1.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Blackburn | £33 | £246 |
| Install An RSJ near Accrington | £33 | £243 |
| Install An RSJ near Darwen | £34 | £253 |
| Install An RSJ near Rawtenstall | £29 | £213 |
| Install An RSJ near Bamber Bridge | £30 | £216 |
| Install An RSJ near Chorley | £30 | £221 |
| Install An RSJ near Burnley | £29 | £219 |
| Install An RSJ near Preston | £30 | £218 |
| Install An RSJ near Leyland | £30 | £223 |
| Install An RSJ near Fulwood | £31 | £217 |
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 - £17,169

Two storey extension - £87,503

Build a timber frame extension - £25,669

Build a swimming pool - £80,669

Single storey extension - £48,376

Side return extension - £37,774

Install an RSJ - £1,869

Outbuilding - £9,669

Build a Mansard loft conversion - £51,669

Loft conversion - £30,645

Build a kitchen extension - £41,669

Hip to gable loft conversion - £41,669

Granny annexe - £86,669

Garden office - £9,669

Convert a Garage - £15,669

Garage - £18,169

Build a flat roof extension - £21,669

Build a dormer loft conversion - £41,669

Concrete foundations - £5,919

Convert a bungalow loft - £28,669

Convert a basement - £33,774