From £1,808
Need an Extension Builder in Coleraine? SF Carpentry has been helping local clients (20 mile radius) with their extension buildering jobs for many ...
From £1,696
Trusted and professional extension builder in Coleraine. Experienced in all extension buildering work and keeping within budget and on quote. purdy...
From £1,720
Luxury Garden Studios is an established and experienced local extension builder in Coleraine. Please contact us for a free, no obligation quote and...
From £1,632
We have over 25 years experience in all building work and renowned for good workmanship All jobs small and large taken on
From £2,104
FJS CONTRACTS LTD are here to help customers who need an Extension Builder in Coleraine. We offer a competitive rate to complete all your extension...
From £2,216
Seamus Mcmullan building and joinery is an established extension buildering business in Coleraine. 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 Coleraine it ranges from £1,632 (C McGurk Building Contractor based in BT44) to £2,216 (Seamus Mcmullan building and joinery based in BT45).
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 Coleraine by posting a job with HaMuch and we will send it to extension builders in Coleraine.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Coleraine | £23 | £201 |
| Install An RSJ near Ballymoney | £21 | £187 |
| Install An RSJ near Dungiven | £22 | £190 |
| Install An RSJ near Magherafelt | £30 | £238 |
| Install An RSJ near Londonderry | £24 | £190 |
| Install An RSJ near Strathfoyle | £24 | £190 |
| Install An RSJ near Newbuildings | £24 | £190 |
| Install An RSJ near Strabane | £27 | £223 |
| Install An RSJ near Ballyclare | £20 | £124 |
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 - £17,163

Two storey extension - £87,494

Build a timber frame extension - £25,663

Build a swimming pool - £80,663

Single storey extension - £48,253

Side return extension - £37,705

Install an RSJ - £1,863

Outbuilding - £9,663

Build a Mansard loft conversion - £51,663

Loft conversion - £30,588

Build a kitchen extension - £41,663

Hip to gable loft conversion - £41,663

Granny annexe - £86,663

Garden office - £9,663

Convert a Garage - £15,663

Garage - £18,163

Build a flat roof extension - £21,663

Build a dormer loft conversion - £41,663

Concrete foundations - £5,913

Convert a bungalow loft - £28,663

Convert a basement - £33,705