There are a limited number of car spaces available behind the residences which are allocated each year. Details will be provided in the arrival pack in your accommodation.
For parking on campus, please see http://www.dcu.ie/info/regulations/parking.shtml
The only place where bicycles can be left on the campus is in a University bicycle rack, some of which are located in both courtyards. Any bicycle found in the residences will have a second lock put on it, and the owner will have to pay a fine before the lock is removed.