Find a builder to make your building structurally sound

RSJs support your new extension or other construction to ensure that your property is structurally sound. They are crucial parts of your building work that mustn't be ignored, and must be installed by a professional. 

Install an RSJ cost in NP20 - Sort by rates or availability

A M I Construction

From £2,080

(last active 02/10/26)

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...

Barlam Drylining Ltd

From £2,096

(last active 02/10/26)

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...

P.D.Builders

From £2,072

(last active 01/10/26)

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...

A.Gaddarn Builders

From £1,400

(last active 01/10/26)

Very reliable honest and hard working guarantee all work clean and tidy first class work

Sunnyside Property Developments

From £2,144

(last active 01/10/26)

Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

N J Laity & Son & Grandson's

From £2,496

(last active 30/09/26)

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...

MOORLAND DESIGN & BUILD LTD

From £2,040

(last active 30/09/26)

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...

Neil Causon & Son

From £1,928

(last active 30/09/26)

Neil Causon & Son is an established and experienced local extension builder in NP20. Please contact us for a free, no obligation quote and competit...

Mucha Construcion

From £2,024

(last active 30/09/26)

Need an Extension Builder in NP20? Mucha Construcion has been helping local clients (20 mile radius) with their extension buildering jobs for many ...

RD Pope Construction

From £2,120

(last active 26/09/26)

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...

RSJ cost in NP20

Estimates for install an rsj near NP20

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


Get extension builder rates instantly

Get extension builder rates instantly (excluding VAT or callout charges)
Location in UKHourly RateDaily 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

Estimates for common extension builder jobs in NP20;

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.

More extensions & conversions cost guides...