From £1,816
CHANDER CONSTRUCTION LIMITED is an established and experienced local extension builder in NP23. Please contact us for a free, no obligation quote a...
From £1,928
Experienced extension builder ready to quote for your work. Limitlesskitchens is the best extension builder in NP23. No obligation free quotes and ...
From £2,072
Need an Extension Builder in NP23? P.D.Builders has been helping local clients (20 mile radius) with their extension buildering jobs for many years...
From £2,000
Need to find an Extension Builder near you for all your extension buildering work?
A B CONSTRUCTION provides a local, trusted extension bui...
From £1,808
Relax... you have found a reliable extension builder in NP23. HEDLYN BUILDING CONTRACTORS is a friendly and reliable company based in NP23 who con...
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 £1,968
Our building services company JSP Carpentry & Building Services has 15 years of experience in the industry. Since then, we have been helping custom...
From £2,144
Trusted and professional extension builder in NP23. Experienced in all extension buildering work and keeping within budget and on quote. BIs Group ...
From £2,000
Need an Extension Builder in NP23? MG3Design has been helping local clients (20 mile radius) with their extension buildering jobs for many years. G...
From £2,048
Relax... you have found a reliable extension builder in NP23. Professional Concrete Solutions is a friendly and reliable company based in NP23 who ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in NP23 it ranges from £1,808 (HEDLYN BUILDING CONTRACTORS based in NP4) 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 NP23 by posting a job with HaMuch and we will send it to extension builders in NP23.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Ebbw Vale | £30 | £217 |
| Install An RSJ near Tredegar | £30 | £217 |
| Install An RSJ near Pontypool | £30 | £210 |
| Install An RSJ near Merthyr Tydfil | £33 | £220 |
| Install An RSJ near Cwmbran | £43 | £219 |
| Install An RSJ near Aberdare | £32 | £212 |
| Install An RSJ near Risca | £32 | £218 |
| Install An RSJ near Rhondda, Cynon, Taff | £31 | £209 |
| Install An RSJ near Pontypridd | £33 | £211 |
| Install An RSJ near Caerphilly | £33 | £208 |
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 - £17,263

Two storey extension - £87,645

Build a timber frame extension - £25,763

Build a swimming pool - £80,763

Single storey extension - £50,264

Side return extension - £38,836

Install an RSJ - £1,963

Outbuilding - £9,763

Build a Mansard loft conversion - £51,763

Loft conversion - £31,530

Build a kitchen extension - £41,763

Hip to gable loft conversion - £41,763

Granny annexe - £86,763

Garden office - £9,763

Convert a Garage - £15,763

Garage - £18,263

Build a flat roof extension - £21,763

Build a dormer loft conversion - £41,763

Concrete foundations - £6,013

Convert a bungalow loft - £28,763

Convert a basement - £34,836