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 £2,096
Planet ozone ltd is an established and experienced local extension builder in IP25. Please contact us for a free, no obligation quote and competiti...
From £1,848
Trusted and professional extension builder in IP25. Experienced in all extension buildering work and keeping within budget and on quote. C MARSH BU...
From £1,544
All works carried out to a very high standard, 30 years experience in all aspects of building works & general plumbing, honest reliable tradesm...
From £1,328
Our team are a well established and well trusted company with many years experiance all roofing and building work completed to th...
From £1,840
BARLOW CONSTRUCTION is an established extension buildering business in IP25. We come highly recommended and provide competitive quotes for your wor...
From £2,024
GREENBUILDING SOLUTIONS LTD is an established extension buildering business in IP25. We come highly recommended and provide competitive quotes for ...
From £2,232
Need to find an Extension Builder near you for all your extension buildering work?
MICKS BUILDING SERVICES provides a local, trusted extens...
From £1,920
Walker Design and Installation has been designing and fitting quality tiling installations for over ten years.Our company is built on trust and the...
From £2,600
Helenski Group Ltd specialises in complete bathroom renovations, luxury tiling, kitchens and full property refurbishments. We have over 20 years of...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in IP25 it ranges from £1,328 (RM contractors based in Nr20) to £2,600 (Helenski Group Ltd based in IP24).
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 IP25 by posting a job with HaMuch and we will send it to extension builders in IP25.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Breckland | £28 | £248 |
| Install An RSJ near Dereham | £25 | £203 |
| Install An RSJ near Thetford | £42 | £277 |
| Install An RSJ near Norwich | £25 | £200 |
| Install An RSJ near Broadland | £24 | £194 |
| Install An RSJ near Kings Lynn & West Norfolk | £31 | £238 |
| Install An RSJ near King's Lynn | £33 | £254 |
| Install An RSJ near Bury St Edmunds | £34 | £251 |
| Install An RSJ near Ely | £40 | £279 |
| Install An RSJ near Stowmarket | £30 | £221 |
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 - £17,250

Two storey extension - £87,624

Build a timber frame extension - £25,750

Build a swimming pool - £80,750

Single storey extension - £49,992

Side return extension - £38,683

Install an RSJ - £1,950

Outbuilding - £9,750

Build a Mansard loft conversion - £51,750

Loft conversion - £31,403

Build a kitchen extension - £41,750

Hip to gable loft conversion - £41,750

Granny annexe - £86,750

Garden office - £9,750

Convert a Garage - £15,750

Garage - £18,250

Build a flat roof extension - £21,750

Build a dormer loft conversion - £41,750

Concrete foundations - £6,000

Convert a bungalow loft - £28,750

Convert a basement - £34,683