Power Construction is an established and experienced local extension builder in BT66. Please contact us for a free, no obligation quote and competi...
From £1,648
Trusted and professional extension builder in BT66. Experienced in all extension buildering work and keeping within budget and on quote. The Method...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in BT66 it ranges from £1,560 (Power Construction based in BT65) to £1,648 (The Method Group based in BT66).
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 BT66 by posting a job with HaMuch and we will send it to extension builders in BT66.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Waringstown | £23 | £167 |
| Install An RSJ near Craigavon | £23 | £181 |
| Install An RSJ near Maghaberry | £31 | £205 |
| Install An RSJ near Banbridge | £29 | £205 |
| Install An RSJ near Hillsborough and Culcavy | £25 | £170 |
| Install An RSJ near Lisburn | £24 | £164 |
| Install An RSJ near Crumlin | £26 | £194 |
| Install An RSJ near Coalisland | £27 | £223 |
| Install An RSJ near Carryduff | £23 | £158 |
| Install An RSJ near Ballynahinch | £19 | £189 |
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 - £16,904

Two storey extension - £87,106

Build a timber frame extension - £25,404

Build a swimming pool - £80,404

Single storey extension - £43,080

Side return extension - £34,795

Install an RSJ - £1,604

Outbuilding - £9,404

Build a Mansard loft conversion - £51,404

Loft conversion - £28,163

Build a kitchen extension - £41,404

Hip to gable loft conversion - £41,404

Granny annexe - £86,404

Garden office - £9,404

Convert a Garage - £15,404

Garage - £17,904

Build a flat roof extension - £21,404

Build a dormer loft conversion - £41,404

Concrete foundations - £5,654

Convert a bungalow loft - £28,404

Convert a basement - £30,795