From £1,496
Ballantine building solutions is an established extension buildering business in Ballyclare. We come highly recommended and provide competitive quo...
From £1,576
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £1,464
Trusted and professional extension builder in Ballyclare. Experienced in all extension buildering work and keeping within budget and on quote. DGA ...
From £1,584
Designco Ltd is an established extension buildering business in Ballyclare. We come highly recommended and provide competitive quotes for your work...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Ballyclare it ranges from £1,464 (DGA based in BT37) to £1,584 (Designco Ltd based in BT36).
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 Ballyclare by posting a job with HaMuch and we will send it to extension builders in Ballyclare.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Ballyclare | £20 | £124 |
| Install An RSJ near Greenisland | £23 | £153 |
| Install An RSJ near Carrickfergus | £23 | £158 |
| Install An RSJ near Larne | £15 | £122 |
| Install An RSJ near Holywood | £23 | £159 |
| Install An RSJ near Belfast | £23 | £161 |
| Install An RSJ near Crumlin | £26 | £194 |
| Install An RSJ near Carryduff | £23 | £158 |
| Install An RSJ near Bangor | £24 | £183 |
| Install An RSJ near Bangor | £24 | £183 |
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 - £16,830

Two storey extension - £86,995

Build a timber frame extension - £25,330

Build a swimming pool - £80,330

Single storey extension - £41,600

Side return extension - £33,963

Install an RSJ - £1,530

Outbuilding - £9,330

Build a Mansard loft conversion - £51,330

Loft conversion - £27,469

Build a kitchen extension - £41,330

Hip to gable loft conversion - £41,330

Granny annexe - £86,330

Garden office - £9,330

Convert a Garage - £15,330

Garage - £17,830

Build a flat roof extension - £21,330

Build a dormer loft conversion - £41,330

Concrete foundations - £5,580

Convert a bungalow loft - £28,330

Convert a basement - £29,963