From £2,120
We are a family business for 37 years experience between us reliable Team value for money check out our reviews on Google Rated People bar...
From £1,744
Need to find an Extension Builder near you for all your extension buildering work?
Poulton Building & Joinery Services provides a local, tr...
From £1,960
Attention to detail. Member of safe trader. Recommendations References available.
From £1,696
COASTAL CONSTRUCTION LTD is an established and experienced local extension builder in LA13. Please contact us for a free, no obligation quote and c...
From £1,912
Trusted and professional extension builder in LA13. Experienced in all extension buildering work and keeping within budget and on quote. CORKHILL C...
From £2,096
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £1,592
Self employed and am good at what I do 40 yrs experience
From £1,760
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £1,696
ADAM READ TRADITIONAL BUILDING is an established and experienced local extension builder in LA13. Please contact us for a free, no obligation quote...
From £1,800
Lancaster Building Contractors is an established and experienced local extension builder in LA13. 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 LA13 it ranges from £1,592 (Owen Williamson based in LA14) to £2,120 (JPw Property Care LTD based in LA4).
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 LA13 by posting a job with HaMuch and we will send it to extension builders in LA13.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Barrow-in-Furness | £25 | £204 |
| Install An RSJ near Morecambe | £25 | £212 |
| Install An RSJ near Fleetwood | £28 | £206 |
| Install An RSJ near Lancaster | £25 | £211 |
| Install An RSJ near Thornton | £29 | £211 |
| Install An RSJ near Blackpool | £29 | £209 |
| Install An RSJ near Kendal | £28 | £236 |
| Install An RSJ near Lytham St Annes | £28 | £206 |
| Install An RSJ near Fulwood | £31 | £217 |
| Install An RSJ near Penwortham | £30 | £218 |
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 - £17,138

Two storey extension - £87,456

Build a timber frame extension - £25,638

Build a swimming pool - £80,638

Single storey extension - £47,752

Side return extension - £37,423

Install an RSJ - £1,838

Outbuilding - £9,638

Build a Mansard loft conversion - £51,638

Loft conversion - £30,353

Build a kitchen extension - £41,638

Hip to gable loft conversion - £41,638

Granny annexe - £86,638

Garden office - £9,638

Convert a Garage - £15,638

Garage - £18,138

Build a flat roof extension - £21,638

Build a dormer loft conversion - £41,638

Concrete foundations - £5,888

Convert a bungalow loft - £28,638

Convert a basement - £33,423