We always try to house students as close as possible to their course location. In Utrecht, there are several student dormitories, which are located throughout the city. We try to put students that are taking the same course in the same accommodation(s).
In order to manage that, we allocate rooms and apartments at the moment we have the final information and numbers of participants. Therefore we guarantee accommodation, but you will only know the exact place upon arrival in Utrecht. At any rate you will be placed together with other Summer School students.
If you wish to know more about housing in general you can have a look at your pre-departure document. You can find this in your account after your payment has been registered.