There are different rules about the occupancy of cellars and basements. You can read more about this topic in the brochure Occupancy of Cellars and Basements in One- and Two-Family Dwellings.
Building Construction or Alteration Permit
Housing & DevelopmentBuilding Management ResourcesInformation & Assistance
Housing & DevelopmentBuildings & PropertyInformation & Assistance
Housing & DevelopmentPrivate Homeowner ResourcesInformation & Assistance