From £1,832
Taggart Homes - The Designer Builder are here to help customers who need an Extension Builder in BT48. We offer a competitive rate to complete all ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in BT48 it ranges from £1,832 (Taggart Homes - The Designer Builder based in BT47) to £1,832 (Taggart Homes - The Designer Builder based in BT47).
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 BT48 by posting a job with HaMuch and we will send it to extension builders in BT48.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Strathfoyle | £24 | £190 |
| Install An RSJ near Culmore | £24 | £190 |
| Install An RSJ near Newbuildings | £24 | £190 |
| Install An RSJ near Londonderry | £24 | £190 |
| Install An RSJ near Eglinton | £25 | £204 |
| Install An RSJ near Strabane | £30 | £240 |
| Install An RSJ near Dungiven | £22 | £190 |
| Install An RSJ near Coleraine | £23 | £201 |
| Install An RSJ near Magherafelt | £30 | £238 |
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 - £17,132

Two storey extension - £87,448

Build a timber frame extension - £25,632

Build a swimming pool - £80,632

Single storey extension - £47,640

Side return extension - £37,360

Install an RSJ - £1,832

Outbuilding - £9,632

Build a Mansard loft conversion - £51,632

Loft conversion - £30,300

Build a kitchen extension - £41,632

Hip to gable loft conversion - £41,632

Granny annexe - £86,632

Garden office - £9,632

Convert a Garage - £15,632

Garage - £18,132

Build a flat roof extension - £21,632

Build a dormer loft conversion - £41,632

Concrete foundations - £5,882

Convert a bungalow loft - £28,632

Convert a basement - £33,360