We know students that have kept their housing cost (rent and utilities) maybe in the $450 price area, but that is older, more cramped, farther from campus - usually a number of students renting a house. DD had no rent increase from her first to second apt year, but next year has a $50 a month increase. One key thing to remember is that moving from place to place gets expensive, and then the drudgery of parent helping to move, especially with furniture.
Key for students that go away from home is to learn personal budgeting before they get to college - one DD was good with this, another learned it in the semester long personal finance course at her HS which was Dave Ramsey. Some students do have jobs which they use for personal expenses. Some parents are having to put an amount in the student’s bank account weekly (on Monday) because they go through their monthly amount too quickly (and also this way they can learn to ‘save’ some money for weekend spending).