We always try to house student in close proximity of their course location. If the course location of your friend is at a different campus, you cannot stay at the same accommodation.
In Utrecht, there are several student dormitories, which are located throughout the city. Utrecht Summer School generally tries to house students from one course in the same accommodation. Students from other courses might by housed together in the same building as well, which gives you the great opportunity to meet international students from other disciplines. There are no standard combinations of specific courses and student accommodations. The housing of students of each course depends on the duration of the course and its number of participants.
Therefore, it is very difficult for us to comply with housing requests. You can send us a request to be housed together, but we cannot guarantee that we can meet your request. Also keep in mind that this means that there's a chance that at least one of you, or both, won't be staying with students from the same course.