As Carbonie Déménagement does not offer utility rental in Geneva and many customers request this service, we have made a list of rental companies available in the canton of Geneva. We only focused on the 20m3 van renters because it is the biggest category when you have a simple B license.  

However, be always careful because renters are like movers, you must confirm as soon as possible in order to have them. Ends of month are much requested, especially the end of March; June; September and just before Christmas.