From £2,200
SKED CONSTRUCTION LTD are here to help customers who need an Extension Builder in South Lanarkshire. We offer a competitive rate to complete all yo...
From £2,504
We are a young vibrant company specialised in plastering Roughcasting and roofing (wet trades) we have a fresh approach and a mission to offer some...
From £1,840
Trusted and professional extension builder in South Lanarkshire. Experienced in all extension buildering work and keeping within budget and on quot...
From £1,976
BURNSIDE DESIGN & BUILD LTD is a trusted extension builder serving customers in South Lanarkshire and the surrounding area. Contact us to today to ...
From £1,848
Glenavon Joinery & Construction Services Ltd is an established extension buildering business in South Lanarkshire. We come highly recommended and p...
From £1,952
Relax... you have found a reliable extension builder in South Lanarkshire. Dingwall Joiners & Builders is a friendly and reliable company based in ...
From £2,328
Swiftbuild are here to help customers who need an Extension Builder in South Lanarkshire. We offer a competitive rate to complete all your extensio...
From £1,920
Need to find an Extension Builder near you for all your extension buildering work?
Glencairn Builders & Joiners provides a local, trusted e...
From £1,928
Need to find an Extension Builder near you for all your extension buildering work?
APSIS SOLTIONS CONSTRUCTION provides a local, trusted ex...
From £2,544
Finavary Designs Ltd is an established extension buildering business in South Lanarkshire. We come highly recommended and provide competitive quote...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in South Lanarkshire it ranges from £1,840 (Clyde Windows And Construction Limited based in ML9) to £2,544 (Finavary Designs Ltd based in ml3).
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 South Lanarkshire by posting a job with HaMuch and we will send it to extension builders in South Lanarkshire.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near South Lanarkshire | £33 | £250 |
| Install An RSJ near Larkhall | £31 | £237 |
| Install An RSJ near Wishaw | £30 | £231 |
| Install An RSJ near Motherwell | £31 | £227 |
| Install An RSJ near Bellshill | £32 | £235 |
| Install An RSJ near North Lanarkshire | £31 | £238 |
| Install An RSJ near Airdrie | £31 | £238 |
| Install An RSJ near Viewpark | £31 | £233 |
| Install An RSJ near Coatbridge | £32 | £245 |
| Install An RSJ near Blantyre | £33 | £240 |
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 - £17,404

Two storey extension - £87,856

Build a timber frame extension - £25,904

Build a swimming pool - £80,904

Single storey extension - £53,080

Side return extension - £40,420

Install an RSJ - £2,104

Outbuilding - £9,904

Build a Mansard loft conversion - £51,904

Loft conversion - £32,850

Build a kitchen extension - £41,904

Hip to gable loft conversion - £41,904

Granny annexe - £86,904

Garden office - £9,904

Convert a Garage - £15,904

Garage - £18,404

Build a flat roof extension - £21,904

Build a dormer loft conversion - £41,904

Concrete foundations - £6,154

Convert a bungalow loft - £28,904

Convert a basement - £36,420