From £2,352
Relax... you have found a reliable extension builder in Cambridge. CROWNBUILD is a friendly and reliable company based in Cambridge who consider no...
From £2,608
Need to find an Extension Builder near you for all your extension buildering work?
Louise Swarbrick Design provides a local, trusted extens...
From £2,576
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,424
Cambridge, CB5
SP-Building Services Ltd is an established and experienced local extension builder in Cambridge. Please contact us for a free, no obligation quote ...
From £2,176
Need an Extension Builder in Cambridge? SturdyBuild has been helping local clients (20 mile radius) with their extension buildering jobs for many y...
From £2,136
Cambridge, CB1
TSN Consultants Ltd are here to help customers who need an Extension Builder in Cambridge. We offer a competitive rate to complete all your extensi...
From £2,280
Coulson Building Group is a trusted extension builder serving customers in Cambridge and the surrounding area. Contact us to today to get a competi...
From £2,272
Relax... you have found a reliable extension builder in Cambridge. D Stebbings is a friendly and reliable company based in Cambridge who consider n...
From £2,328
Need an Extension Builder in Cambridge? Baufritz (UK) Limited has been helping local clients (20 mile radius) with their extension buildering jobs ...
From £2,432
WESTWICK BUILDERS LIMITED is an established extension buildering business in Cambridge. We come highly recommended and provide competitive quotes f...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Cambridge it ranges from £2,136 (TSN Consultants Ltd based in CB1) to £2,608 (Louise Swarbrick Design based in CB3).
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 Cambridge by posting a job with HaMuch and we will send it to extension builders in Cambridge.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Cambridge | £38 | £271 |
| Install An RSJ near South Cambridgeshire | £43 | £305 |
| Install An RSJ near Ely | £40 | £279 |
| Install An RSJ near Huntingdon | £38 | £284 |
| Install An RSJ near Haverhill | £37 | £260 |
| Install An RSJ near St Neots | £51 | £318 |
| Install An RSJ near Biggleswade | £41 | £268 |
| Install An RSJ near Huntingdonshire | £36 | £290 |
| Install An RSJ near Letchworth | £44 | £283 |
| Install An RSJ near North Hertfordshire | £44 | £283 |
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 - £17,658

Two storey extension - £88,238

Build a timber frame extension - £26,158

Build a swimming pool - £81,158

Single storey extension - £58,168

Side return extension - £43,282

Install an RSJ - £2,358

Outbuilding - £10,158

Build a Mansard loft conversion - £52,158

Loft conversion - £35,235

Build a kitchen extension - £42,158

Hip to gable loft conversion - £42,158

Granny annexe - £87,158

Garden office - £10,158

Convert a Garage - £16,158

Garage - £18,658

Build a flat roof extension - £22,158

Build a dormer loft conversion - £42,158

Concrete foundations - £6,408

Convert a bungalow loft - £29,158

Convert a basement - £39,282