From £1,712
Ballynahinch, BT24
N W Doyle & Son is a trusted extension builder serving customers in Ballynahinch and the surrounding area. Contact us to today to get a competitive...
From £1,472
apex pharaoh ltd is a trusted extension builder serving customers in Ballynahinch and the surrounding area. Contact us to today to get a competitiv...
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 £1,600
T.I Building is a trusted extension builder serving customers in Ballynahinch and the surrounding area. Contact us to today to get a competitive qu...
From £1,584
Relax... you have found a reliable extension builder in Ballynahinch. Finch Construction NI is a friendly and reliable company based in Ballynahinc...
From £1,376
Trusted and professional extension builder in Ballynahinch. Experienced in all extension buildering work and keeping within budget and on quote. Ex...
From £1,536
Trusted and professional extension builder in Ballynahinch. Experienced in all extension buildering work and keeping within budget and on quote. Be...
From £1,568
Relax... you have found a reliable extension builder in Ballynahinch. SM Plumbing & Heating is a friendly and reliable company based in Ballynahinc...
From £1,512
Colin Gilmore Building Contractor is an established extension buildering business in Ballynahinch. We come highly recommended and provide competiti...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Ballynahinch it ranges from £1,336 (Mount Oriel Conversions & Extensions based in BT8) to £1,712 (N W Doyle & Son based in BT24).
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 Ballynahinch by posting a job with HaMuch and we will send it to extension builders in Ballynahinch.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Ballynahinch | £19 | £189 |
| Install An RSJ near Saintfield | £23 | £162 |
| Install An RSJ near Carryduff | £23 | £158 |
| Install An RSJ near Hillsborough and Culcavy | £25 | £170 |
| Install An RSJ near Lisburn | £24 | £164 |
| Install An RSJ near Comber | £22 | £160 |
| Install An RSJ near Ballygowan | £24 | £183 |
| Install An RSJ near Belfast | £23 | £161 |
| Install An RSJ near Portaferry | £22 | £164 |
| Install An RSJ near Maghaberry | £31 | £205 |
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 - £16,838

Two storey extension - £87,008

Build a timber frame extension - £25,338

Build a swimming pool - £80,338

Single storey extension - £41,768

Side return extension - £34,057

Install an RSJ - £1,538

Outbuilding - £9,338

Build a Mansard loft conversion - £51,338

Loft conversion - £27,548

Build a kitchen extension - £41,338

Hip to gable loft conversion - £41,338

Granny annexe - £86,338

Garden office - £9,338

Convert a Garage - £15,338

Garage - £17,838

Build a flat roof extension - £21,338

Build a dormer loft conversion - £41,338

Concrete foundations - £5,588

Convert a bungalow loft - £28,338

Convert a basement - £30,057