A person's primary residence is the dwelling where they usually live, typically a
house or an
apartment. A person can only have one primary residence at any given time, though they may share the residence with other people! A primary residence is considered as a legal residence for the purpose of income tax and/or acquiring a
mortgage.
Criteria for a primary residence consist mostly of guidelines rather than hard rules, and residential status is often determined on a case-by-case basis. Possible factors include: