From £1,960
In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...
From £1,504
John Scarisbrick
Local reliable family business
Free estimates
Clean friendly service
From £2,200
Urban Select Construction is a trusted extension builder serving customers in L39 and the surrounding area. Contact us to today to get a competitiv...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in L39 it ranges from £1,504 (John Scarisbrick based in L39) to £2,200 (Urban Select Construction based in L39).
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 L39 by posting a job with HaMuch and we will send it to extension builders in L39.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Ormskirk | £29 | £206 |
| Install An RSJ near West Lancashire | £28 | £203 |
| Install An RSJ near Maghull | £33 | £220 |
| Install An RSJ near Skelmersdale | £28 | £210 |
| Install An RSJ near Kirkby | £31 | £224 |
| Install An RSJ near Southport | £27 | £198 |
| Install An RSJ near Formby | £23 | £162 |
| Install An RSJ near Sefton | £33 | £221 |
| Install An RSJ near Crosby | £33 | £223 |
| Install An RSJ near Orrell | £29 | £214 |
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 - £17,188

Two storey extension - £87,532

Build a timber frame extension - £25,688

Build a swimming pool - £80,688

Single storey extension - £48,760

Side return extension - £37,990

Install an RSJ - £1,888

Outbuilding - £9,688

Build a Mansard loft conversion - £51,688

Loft conversion - £30,825

Build a kitchen extension - £41,688

Hip to gable loft conversion - £41,688

Granny annexe - £86,688

Garden office - £9,688

Convert a Garage - £15,688

Garage - £18,188

Build a flat roof extension - £21,688

Build a dormer loft conversion - £41,688

Concrete foundations - £5,938

Convert a bungalow loft - £28,688

Convert a basement - £33,990