From £2,200
All In One Building Services is an established and experienced local extension builder in CB25. Please contact us for a free, no obligation quote a...
From £2,088
Need to find an Extension Builder near you for all your extension buildering work?
Bespoke Build and Restoration ltd provides a local, trus...
From £2,280
Coulson Building Group is a trusted extension builder serving customers in CB25 and the surrounding area. Contact us to today to get a competitive ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in CB25 it ranges from £2,088 (Bespoke Build and Restoration ltd based in CB25) to £2,280 (Coulson Building Group based in CB4).
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 CB25 by posting a job with HaMuch and we will send it to extension builders in CB25.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Cambridge | £41 | £275 |
| Install An RSJ near Ely | £40 | £279 |
| Install An RSJ near South Cambridgeshire | £50 | £315 |
| Install An RSJ near Haverhill | £37 | £260 |
| Install An RSJ near Huntingdon | £38 | £284 |
| Install An RSJ near Bury St Edmunds | £34 | £251 |
| Install An RSJ near St Neots | £51 | £318 |
| Install An RSJ near Huntingdonshire | £36 | £290 |
| Install An RSJ near Biggleswade | £41 | £268 |
| Install An RSJ near Thetford | £42 | £277 |
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 - £17,489

Two storey extension - £87,984

Build a timber frame extension - £25,989

Build a swimming pool - £80,989

Single storey extension - £54,787

Side return extension - £41,380

Install an RSJ - £2,189

Outbuilding - £9,989

Build a Mansard loft conversion - £51,989

Loft conversion - £33,650

Build a kitchen extension - £41,989

Hip to gable loft conversion - £41,989

Granny annexe - £86,989

Garden office - £9,989

Convert a Garage - £15,989

Garage - £18,489

Build a flat roof extension - £21,989

Build a dormer loft conversion - £41,989

Concrete foundations - £6,239

Convert a bungalow loft - £28,989

Convert a basement - £37,380