Does living in university housing mean that they will own intellectual property you create there?
University IP policies generally have a separate category for intellectual property created using resources "usually and customarily provided" by the university. In every policy I've ever seen, even if the university generally retains ownership of IP created using university facilities, this excludes the above category (which would certainly include standard university housing).

For example, at the University of Illinois:


  Traditional academic copyrightable works created using university resources usually and customarily provided are owned by the creators. Such works need not be licensed to the University.
  
  When determining ownership and license rights in copyrightable works, "University resources usually and customarily provided" includes office space, library facilities, ordinary access to computers and networks, or salary.


At the University of Arkansas:


  Creator is entitled to copyright ownership and right to revenues subject to compliance with conflict of interest and commitment policies.
  
  This category applies when the faculty or staff member constructs the materials using nothing more than university resources usually and customarily provided. These include but may not be limited to office space, library facilities, ordinary access to computers and networks, faculty development workshops, or salary.
  
  The author owns the copyright and is entitled to receive all revenues for commercialization, subject to the conflict of interest and commitment policies.


An alternative terminology for the same concept is to distinguish between "substantial" and non-substantial use of resources. For example, at Minnesota State:


  Substantial Use of Resources. Substantial use exists when resources are provided beyond the normal professional, technology, and technical support supplied by the college, university, and/or system office to an individual or individuals for development of a project or program.


Or at CMU:


  Substantial use of university facilities means extensive unreimbursed use of major university laboratory, studio or computational facilities, or human resources. The use of these facilities must be important to the creation of the intellectual property; merely incidental use of a facility does not constitute substantial use, nor does extensive use of a facility commonly available to all faculty or professional staff (such as libraries and offices), nor does extensive use of a specialized facility for routine tasks.