From £2,584
Comprehensive, Intelligent Construction Service offering Domestic and Commercial Buildings, Barn, Basement and Loft Conversions, Renovation & Refur...
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 £2,448
J & N Contracts Cambs Ltd is an established and experienced local extension builder in South Cambridgeshire. Please contact us for a free, no oblig...
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 £2,416
M OLIVER BUILDING is an established and experienced local extension builder in South Cambridgeshire. Please contact us for a free, no obligation qu...
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 £3,560
Experienced extension builder ready to quote for your work. ALLIED BUILDING ASSOCIATES LTD is the best extension builder in South Cambridgeshire. N...
From £2,136
TSN Consultants Ltd are here to help customers who need an Extension Builder in South Cambridgeshire. We offer a competitive rate to complete all y...
From £2,352
Relax... you have found a reliable extension builder in South Cambridgeshire. CROWNBUILD is a friendly and reliable company based in South Cambridg...
From £2,416
Trusted and professional extension builder in South Cambridgeshire. Experienced in all extension buildering work and keeping within budget and on q...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in South Cambridgeshire 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 South Cambridgeshire by posting a job with HaMuch and we will send it to extension builders in South Cambridgeshire.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near South Cambridgeshire | £43 | £305 |
| Install An RSJ near Cambridge | £38 | £271 |
| Install An RSJ near Biggleswade | £41 | £268 |
| Install An RSJ near St Neots | £51 | £318 |
| Install An RSJ near Huntingdon | £38 | £284 |
| Install An RSJ near Letchworth | £44 | £283 |
| Install An RSJ near North Hertfordshire | £44 | £283 |
| Install An RSJ near Haverhill | £37 | £260 |
| Install An RSJ near East Hertfordshire | £44 | £289 |
| Install An RSJ near Ely | £40 | £279 |
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 - £17,837

Two storey extension - £88,505

Build a timber frame extension - £26,337

Build a swimming pool - £81,337

Single storey extension - £61,736

Side return extension - £45,289

Install an RSJ - £2,537

Outbuilding - £10,337

Build a Mansard loft conversion - £52,337

Loft conversion - £36,908

Build a kitchen extension - £42,337

Hip to gable loft conversion - £42,337

Granny annexe - £87,337

Garden office - £10,337

Convert a Garage - £16,337

Garage - £18,837

Build a flat roof extension - £22,337

Build a dormer loft conversion - £42,337

Concrete foundations - £6,587

Convert a bungalow loft - £29,337

Convert a basement - £41,289