From £1,400
Very reliable honest and hard working guarantee all work clean and tidy first class work
From £2,144
Trusted and professional extension builder in Abercarn. Experienced in all extension buildering work and keeping within budget and on quote. BIs Gr...
From £1,848
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,024
LEE BAILEY BUILDING SERVICES are here to help customers who need an Extension Builder in Abercarn. We offer a competitive rate to complete all your...
From £1,616
Trusted and professional extension builder in Abercarn. Experienced in all extension buildering work and keeping within budget and on quote. M2 Bui...
From £2,016
G T Brickwork is an established extension buildering business in Abercarn. We come highly recommended and provide competitive quotes for your work....
From £2,064
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,128
Experienced extension builder ready to quote for your work. DAYS BUILDING SERVICES LTD is the best extension builder in Abercarn. No obligation fre...
From £2,048
Atlantic Building Services Ltd is an established extension buildering business in Abercarn. We come highly recommended and provide competitive quot...
From £2,000
Need an Extension Builder in Abercarn? MG3Design has been helping local clients (20 mile radius) with their extension buildering jobs for many year...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Abercarn it ranges from £1,400 (A.Gaddarn Builders based in NP11) to £2,144 (BIs Group based in NP12).
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 Abercarn by posting a job with HaMuch and we will send it to extension builders in Abercarn.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Risca | £32 | £218 |
| Install An RSJ near Cwmbran | £43 | £219 |
| Install An RSJ near Caerphilly | £33 | £208 |
| Install An RSJ near Pontypool | £30 | £210 |
| Install An RSJ near Newport | £41 | £233 |
| Install An RSJ near Pontypridd | £33 | £211 |
| Install An RSJ near Church Village | £34 | £214 |
| Install An RSJ near Ebbw Vale | £28 | £218 |
| Install An RSJ near Tredegar | £28 | £218 |
| Install An RSJ near Cardiff | £35 | £219 |
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 - £17,229

Two storey extension - £87,593

Build a timber frame extension - £25,729

Build a swimming pool - £80,729

Single storey extension - £49,576

Side return extension - £38,449

Install an RSJ - £1,929

Outbuilding - £9,729

Build a Mansard loft conversion - £51,729

Loft conversion - £31,208

Build a kitchen extension - £41,729

Hip to gable loft conversion - £41,729

Granny annexe - £86,729

Garden office - £9,729

Convert a Garage - £15,729

Garage - £18,229

Build a flat roof extension - £21,729

Build a dormer loft conversion - £41,729

Concrete foundations - £5,979

Convert a bungalow loft - £28,729

Convert a basement - £34,449