From £2,120
Inspire Carpentry and Construction Ltd is an established and experienced local extension builder in CB2. Please contact us for a free, no obligatio...
From £2,360
Silverwood Construction (Cambridge) Ltd are here to help customers who need an Extension Builder in CB2. We offer a competitive rate to complete al...
From £2,352
Relax... you have found a reliable extension builder in CB2. CROWNBUILD is a friendly and reliable company based in CB2 who consider no job as too ...
From £2,472
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,272
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,656
MDH Construction is an established and experienced local extension builder in CB2. Please contact us for a free, no obligation quote and competitiv...
From £3,560
Experienced extension builder ready to quote for your work. ALLIED BUILDING ASSOCIATES LTD is the best extension builder in CB2. No obligation free...
From £2,600
D C Salsbury Builders is an established and experienced local extension builder in CB2. Please contact us for a free, no obligation quote and compe...
From £2,352
Need to find an Extension Builder near you for all your extension buildering work?
JKL Construction & Carpentry Ltd provides a local, trust...
From £2,288
Eric Handyman- builder is an established and experienced local extension builder in CB2. Please contact us for a free, no obligation quote and comp...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in CB2 it ranges from £2,120 (Inspire Carpentry and Construction Ltd based in CB24) to £3,560 (ALLIED BUILDING ASSOCIATES LTD based in CB22).
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 CB2 by posting a job with HaMuch and we will send it to extension builders in CB2.
| 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 Haverhill | £37 | £260 |
| Install An RSJ near Ely | £40 | £279 |
| Install An RSJ near St Neots | £51 | £318 |
| Install An RSJ near Huntingdon | £38 | £284 |
| Install An RSJ near Biggleswade | £41 | £268 |
| Install An RSJ near Letchworth | £44 | £283 |
| Install An RSJ near East Hertfordshire | £44 | £289 |
| 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 - £17,803

Two storey extension - £88,455

Build a timber frame extension - £26,303

Build a swimming pool - £81,303

Single storey extension - £61,064

Side return extension - £44,911

Install an RSJ - £2,503

Outbuilding - £10,303

Build a Mansard loft conversion - £52,303

Loft conversion - £36,593

Build a kitchen extension - £42,303

Hip to gable loft conversion - £42,303

Granny annexe - £87,303

Garden office - £10,303

Convert a Garage - £16,303

Garage - £18,803

Build a flat roof extension - £22,303

Build a dormer loft conversion - £42,303

Concrete foundations - £6,553

Convert a bungalow loft - £29,303

Convert a basement - £40,911