Trusted and professional extension builder in SG8. Experienced in all extension buildering work and keeping within budget and on quote. Rescapes Co...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,504
Relax... you have found a reliable extension builder in SG8. Refresh Renovations - Cambridgeshire - Simon is a friendly and reliable company based ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in SG8 it ranges from £2,272 (ECO DESIGN & BUILD (UK) LTD based in SG8) to £2,664 (Rescapes Construction Ltd based in SG8).
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 SG8 by posting a job with HaMuch and we will send it to extension builders in SG8.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near South Cambridgeshire | £50 | £315 |
| Install An RSJ near Letchworth | £44 | £283 |
| Install An RSJ near Biggleswade | £41 | £268 |
| Install An RSJ near North Hertfordshire | £44 | £283 |
| Install An RSJ near Cambridge | £41 | £275 |
| Install An RSJ near East Hertfordshire | £44 | £289 |
| Install An RSJ near Stevenage | £44 | £282 |
| Install An RSJ near Hitchin | £43 | £283 |
| Install An RSJ near St Neots | £51 | £318 |
| Install An RSJ near Bishop's Stortford | £42 | £264 |
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 - £17,780

Two storey extension - £88,420

Build a timber frame extension - £26,280

Build a swimming pool - £81,280

Single storey extension - £60,600

Side return extension - £44,650

Install an RSJ - £2,480

Outbuilding - £10,280

Build a Mansard loft conversion - £52,280

Loft conversion - £36,375

Build a kitchen extension - £42,280

Hip to gable loft conversion - £42,280

Granny annexe - £87,280

Garden office - £10,280

Convert a Garage - £16,280

Garage - £18,780

Build a flat roof extension - £22,280

Build a dormer loft conversion - £42,280

Concrete foundations - £6,530

Convert a bungalow loft - £29,280

Convert a basement - £40,650