From £2,008
Trusted and professional extension builder in LS15. Experienced in all extension buildering work and keeping within budget and on quote. NE BUILDIN...
From £2,168
Relax... you have found a reliable extension builder in LS15. Basement Structures LTD is a friendly and reliable company based in LS15 who consider...
From £1,832
Trusted and professional extension builder in LS15. Experienced in all extension buildering work and keeping within budget and on quote. Fearnville...
From £2,120
Experienced extension builder ready to quote for your work. J W Building Services is the best extension builder in LS15. No obligation free quotes ...
From £2,144
Need an Extension Builder in LS15? D & D Builders has been helping local clients (20 mile radius) with their extension buildering jobs for many yea...
From £1,984
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,136
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 £1,904
Our building services company Inspired Builds was established in 2020, but collectively have over 35 years of experience, providing professional, t...
From £2,008
Relax... you have found a reliable extension builder in LS15. Hoqs Construction is a friendly and reliable company based in LS15 who consider no jo...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in LS15 it ranges from £1,832 (Fearnville Driveways based in LS8) to £2,168 (Basement Structures LTD based in LS15).
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 LS15 by posting a job with HaMuch and we will send it to extension builders in LS15.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Chapeltown | £30 | £232 |
| Install An RSJ near Rothwell | £30 | £230 |
| Install An RSJ near Leeds | £31 | £236 |
| Install An RSJ near Beeston | £31 | £236 |
| Install An RSJ near Castleford | £30 | £225 |
| Install An RSJ near Normanton | £30 | £233 |
| Install An RSJ near Morley | £31 | £239 |
| Install An RSJ near Wakefield | £31 | £240 |
| Install An RSJ near Pudsey | £30 | £226 |
| Install An RSJ near Batley | £32 | £239 |
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 - £17,346

Two storey extension - £87,768

Build a timber frame extension - £25,846

Build a swimming pool - £80,846

Single storey extension - £51,912

Side return extension - £39,763

Install an RSJ - £2,046

Outbuilding - £9,846

Build a Mansard loft conversion - £51,846

Loft conversion - £32,303

Build a kitchen extension - £41,846

Hip to gable loft conversion - £41,846

Granny annexe - £86,846

Garden office - £9,846

Convert a Garage - £15,846

Garage - £18,346

Build a flat roof extension - £21,846

Build a dormer loft conversion - £41,846

Concrete foundations - £6,096

Convert a bungalow loft - £28,846

Convert a basement - £35,763