Power Construction is an established and experienced local extension builder in Derryadd. Please contact us for a free, no obligation quote and com...
From £1,648
Trusted and professional extension builder in Derryadd. Experienced in all extension buildering work and keeping within budget and on quote. The Me...
From £1,736
Experienced extension builder ready to quote for your work. Terry Design is the best extension builder in Derryadd. No obligation free quotes and m...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Derryadd it ranges from £1,560 (Power Construction based in BT65) to £2,760 (Build a Boiler based in BT67).
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 Derryadd by posting a job with HaMuch and we will send it to extension builders in Derryadd.
| 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 - £17,226

Two storey extension - £87,589

Build a timber frame extension - £25,726

Build a swimming pool - £80,726

Single storey extension - £49,520

Side return extension - £38,418

Install an RSJ - £1,926

Outbuilding - £9,726

Build a Mansard loft conversion - £51,726

Loft conversion - £31,181

Build a kitchen extension - £41,726

Hip to gable loft conversion - £41,726

Granny annexe - £86,726

Garden office - £9,726

Convert a Garage - £15,726

Garage - £18,226

Build a flat roof extension - £21,726

Build a dormer loft conversion - £41,726

Concrete foundations - £5,976

Convert a bungalow loft - £28,726

Convert a basement - £34,418