You can do your research according to the type of property to rent, to the surface, and you have access to the distance of the suggested accommodation compared to the ISO Rennes.
Once the perfect treasure found, you can contact the owner very simply, using the contact form or directly by phone when you are connected to your account.
The site ImmoJeune.com is free and will allow you to stay near the ISO Rennes in the best possible conditions.
Good luck and good moving.