From £2,272
Relax... you have found a reliable extension builder in CB1. D Stebbings is a friendly and reliable company based in CB1 who consider no job as too...
From £2,136
TSN Consultants Ltd are here to help customers who need an Extension Builder in CB1. We offer a competitive rate to complete all your extension bui...
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 £2,576
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,424
SP-Building Services Ltd is an established and experienced local extension builder in CB1. Please contact us for a free, no obligation quote and co...
From £2,352
Relax... you have found a reliable extension builder in CB1. CROWNBUILD is a friendly and reliable company based in CB1 who consider no job as too ...
From £2,416
Trusted and professional extension builder in CB1. Experienced in all extension buildering work and keeping within budget and on quote. DEBRAY BUIL...
From £2,280
Coulson Building Group is a trusted extension builder serving customers in CB1 and the surrounding area. Contact us to today to get a competitive q...
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 £3,560
Experienced extension builder ready to quote for your work. ALLIED BUILDING ASSOCIATES LTD is the best extension builder in CB1. No obligation free...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in CB1 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 CB1 by posting a job with HaMuch and we will send it to extension builders in CB1.
| 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 Huntingdon | £31 | £236 |
| Install An RSJ near St Neots | £42 | £256 |
| Install An RSJ near Biggleswade | £35 | £230 |
| Install An RSJ near Bishop's Stortford | £36 | £229 |
| Install An RSJ near East Hertfordshire | £37 | £241 |
| Install An RSJ near Letchworth | £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 - £17,817

Two storey extension - £88,475

Build a timber frame extension - £26,317

Build a swimming pool - £81,317

Single storey extension - £61,336

Side return extension - £45,064

Install an RSJ - £2,517

Outbuilding - £10,317

Build a Mansard loft conversion - £52,317

Loft conversion - £36,720

Build a kitchen extension - £42,317

Hip to gable loft conversion - £42,317

Granny annexe - £87,317

Garden office - £10,317

Convert a Garage - £16,317

Garage - £18,817

Build a flat roof extension - £22,317

Build a dormer loft conversion - £42,317

Concrete foundations - £6,567

Convert a bungalow loft - £29,317

Convert a basement - £41,064