From £2,424
Small extension, to full turn key new house builds, listed building works, renovations. We provide a full comprehensive quotation for all your need...
From £1,944
Experienced extension builder ready to quote for your work. Brayfield Construction is the best extension builder in IP31. No obligation free quotes...
From £1,976
Trusted and professional extension builder in IP31. Experienced in all extension buildering work and keeping within budget and on quote. RD FARROW ...
From £2,056
Experienced extension builder ready to quote for your work. Beechwood Building Services is the best extension builder in IP31. No obligation free q...
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 £2,056
Offering a friendly and professional construction and insulation services to private residential and commercial customers in East Anglia and surrou...
From £2,600
Helenski Group Ltd specialises in complete bathroom renovations, luxury tiling, kitchens and full property refurbishments. We have over 20 years of...
From £1,824
Relax... you have found a reliable extension builder in IP31. Mixbrow Construction is a friendly and reliable company based in IP31 who consider no...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in IP31 it ranges from £1,824 (Mixbrow Construction based in IP6) 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 IP31 by posting a job with HaMuch and we will send it to extension builders in IP31.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Bury St Edmunds | £34 | £251 |
| Install An RSJ near Thetford | £42 | £277 |
| Install An RSJ near Stowmarket | £30 | £221 |
| Install An RSJ near Sudbury | £34 | £229 |
| Install An RSJ near Breckland | £28 | £248 |
| Install An RSJ near Ipswich | £33 | £235 |
| Install An RSJ near Haverhill | £37 | £260 |
| Install An RSJ near Ely | £40 | £279 |
| Install An RSJ near Suffolk Coastal | £28 | £215 |
| Install An RSJ near Dereham | £25 | £203 |
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 - £17,419

Two storey extension - £87,879

Build a timber frame extension - £25,919

Build a swimming pool - £80,919

Single storey extension - £53,384

Side return extension - £40,591

Install an RSJ - £2,119

Outbuilding - £9,919

Build a Mansard loft conversion - £51,919

Loft conversion - £32,993

Build a kitchen extension - £41,919

Hip to gable loft conversion - £41,919

Granny annexe - £86,919

Garden office - £9,919

Convert a Garage - £15,919

Garage - £18,419

Build a flat roof extension - £21,919

Build a dormer loft conversion - £41,919

Concrete foundations - £6,169

Convert a bungalow loft - £28,919

Convert a basement - £36,591