From £1,176
Have worked in building industry for over 30 years contracts from government to private sector.
From £1,600
T.I Building is a trusted extension builder serving customers in Newtownabbey and the surrounding area. Contact us to today to get a competitive qu...
From £1,336
Need to find an Extension Builder near you for all your extension buildering work?
Mount Oriel Conversions & Extensions provides a local, t...
From £1,568
Relax... you have found a reliable extension builder in Newtownabbey. SM Plumbing & Heating is a friendly and reliable company based in Newtownabbe...
From £1,536
Trusted and professional extension builder in Newtownabbey. Experienced in all extension buildering work and keeping within budget and on quote. Be...
From £1,496
Ballantine building solutions is an established extension buildering business in Newtownabbey. We come highly recommended and provide competitive q...
From £1,464
Trusted and professional extension builder in Newtownabbey. Experienced in all extension buildering work and keeping within budget and on quote. DG...
From £1,584
Designco Ltd is an established extension buildering business in Newtownabbey. We come highly recommended and provide competitive quotes for your wo...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Newtownabbey it ranges from £1,176 (Anak based in BT40) 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 Newtownabbey by posting a job with HaMuch and we will send it to extension builders in Newtownabbey.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Greenisland | £23 | £153 |
| Install An RSJ near Holywood | £23 | £159 |
| Install An RSJ near Belfast | £23 | £161 |
| Install An RSJ near Carrickfergus | £23 | £158 |
| Install An RSJ near Ballyclare | £20 | £124 |
| Install An RSJ near Carryduff | £23 | £158 |
| Install An RSJ near Bangor | £24 | £183 |
| Install An RSJ near Bangor | £24 | £183 |
| Install An RSJ near Comber | £22 | £160 |
| Install An RSJ near Ballygowan | £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 - £16,921

Two storey extension - £87,131

Build a timber frame extension - £25,421

Build a swimming pool - £80,421

Single storey extension - £43,416

Side return extension - £34,984

Install an RSJ - £1,621

Outbuilding - £9,421

Build a Mansard loft conversion - £51,421

Loft conversion - £28,320

Build a kitchen extension - £41,421

Hip to gable loft conversion - £41,421

Granny annexe - £86,421

Garden office - £9,421

Convert a Garage - £15,421

Garage - £17,921

Build a flat roof extension - £21,421

Build a dormer loft conversion - £41,421

Concrete foundations - £5,671

Convert a bungalow loft - £28,421

Convert a basement - £30,984