From £2,136
TSN Consultants Ltd are here to help customers who need an Extension Builder in CB2. We offer a competitive rate to complete all your extension bui...
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 £2,352
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 £2,544
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,272
Relax... you have found a reliable extension builder in CB2. D Stebbings is a friendly and reliable company based in CB2 who consider no job as too...
From £2,416
Trusted and professional extension builder in CB2. Experienced in all extension buildering work and keeping within budget and on quote. DEBRAY BUIL...
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 £2,584
Comprehensive, Intelligent Construction Service offering Domestic and Commercial Buildings, Barn, Basement and Loft Conversions, Renovation & Refur...
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 £2,424
SP-Building Services Ltd is an established and experienced local extension builder in CB2. Please contact us for a free, no obligation quote and co...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in CB2 it ranges from £2,136 (TSN Consultants Ltd based in CB1) 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 | £33 | £234 |
| Install An RSJ near South Cambridgeshire | £37 | £258 |
| Install An RSJ near Haverhill | £32 | £228 |
| Install An RSJ near Ely | £33 | £228 |
| Install An RSJ near St Neots | £42 | £256 |
| Install An RSJ near Huntingdon | £31 | £236 |
| Install An RSJ near Biggleswade | £35 | £230 |
| Install An RSJ near Letchworth | £37 | £239 |
| Install An RSJ near East Hertfordshire | £37 | £241 |
| Install An RSJ near North Hertfordshire | £37 | £239 |
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 - £17,847

Two storey extension - £88,521

Build a timber frame extension - £26,347

Build a swimming pool - £81,347

Single storey extension - £61,944

Side return extension - £45,406

Install an RSJ - £2,547

Outbuilding - £10,347

Build a Mansard loft conversion - £52,347

Loft conversion - £37,005

Build a kitchen extension - £42,347

Hip to gable loft conversion - £42,347

Granny annexe - £87,347

Garden office - £10,347

Convert a Garage - £16,347

Garage - £18,847

Build a flat roof extension - £22,347

Build a dormer loft conversion - £42,347

Concrete foundations - £6,597

Convert a bungalow loft - £29,347

Convert a basement - £41,406