From £2,080
Relax... you have found a reliable extension builder in NP20. A M I Construction is a friendly and reliable company based in NP20 who consider no j...
From £2,096
Barlam Drylining Ltd are here to help customers who need an Extension Builder in NP20. We offer a competitive rate to complete all your extension b...
From £2,072
Need an Extension Builder in NP20? P.D.Builders has been helping local clients (20 mile radius) with their extension buildering jobs for many years...
From £1,400
Very reliable honest and hard working guarantee all work clean and tidy first class work
From £2,144
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,496
N J Laity & Son & Grandson's are here to help customers who need an Extension Builder in NP20. We offer a competitive rate to complete all your ext...
From £2,040
MOORLAND DESIGN & BUILD LTD are here to help customers who need an Extension Builder in NP20. We offer a competitive rate to complete all your exte...
From £1,928
Neil Causon & Son is an established and experienced local extension builder in NP20. Please contact us for a free, no obligation quote and competit...
From £2,024
Need an Extension Builder in NP20? Mucha Construcion has been helping local clients (20 mile radius) with their extension buildering jobs for many ...
From £2,120
Relax... you have found a reliable extension builder in NP20. RD Pope Construction is a friendly and reliable company based in NP20 who consider no...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in NP20 it ranges from £1,400 (A.Gaddarn Builders based in NP11) to £2,496 (N J Laity & Son & Grandson's based in BS10).
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 NP20 by posting a job with HaMuch and we will send it to extension builders in NP20.
"RSJ installation" - NEWPORT, job posted 01/01/70
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Newport | £41 | £233 |
| Install An RSJ near Cwmbran | £43 | £219 |
| Install An RSJ near Risca | £32 | £218 |
| Install An RSJ near Pontypool | £30 | £210 |
| Install An RSJ near Caerphilly | £33 | £208 |
| Install An RSJ near Cardiff | £34 | £219 |
| Install An RSJ near Clevedon | £32 | £243 |
| Install An RSJ near Portishead | £33 | £247 |
| Install An RSJ near Penarth | £35 | £218 |
| Install An RSJ near Church Village | £34 | £214 |
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 - £17,340

Two storey extension - £87,760

Build a timber frame extension - £25,840

Build a swimming pool - £80,840

Single storey extension - £51,800

Side return extension - £39,700

Install an RSJ - £2,040

Outbuilding - £9,840

Build a Mansard loft conversion - £51,840

Loft conversion - £32,250

Build a kitchen extension - £41,840

Hip to gable loft conversion - £41,840

Granny annexe - £86,840

Garden office - £9,840

Convert a Garage - £15,840

Garage - £18,340

Build a flat roof extension - £21,840

Build a dormer loft conversion - £41,840

Concrete foundations - £6,090

Convert a bungalow loft - £28,840

Convert a basement - £35,700