In Fairfax County Virginia, housing, building, and zoning codes limit the number of people who may live in a home, apartment, townhouse or condominium.

Occupancy requirements are governed by the Virginia Uniform Statewide Building Code (VUSBC) and the Fairfax County Zoning Ordinance.

The VUSBC places limits on the number of people who may live in a dwelling and establishes the following occupancy standards that are enforced by the Fairfax County Zoning Enforcement Branch:

  1. A bedroom or sleeping area regularly occupied by one (1) person must have at least 70 square feet of space.
  2. For two (2) people, 100 square feet of space.
  3. For three (3) people 150 square feet.
  4. In addition to the space requirement, the room(s) used for sleeping must provide privacy, adequate light and ventilation, and two means of exit; one must lead directly to the outside. Kitchens, bathrooms, hallways, living and dining rooms, non-habitable spaces, and other interior public areas may not be used for sleeping.

The Fairfax County Zoning Ordinance says that no more than four unrelated people may live in a house. Following are other zoning rules that govern how many people can live in a house:

  1. One family, which may consist of one person or two or more persons related by blood or marriage with any number of natural children, foster children, step children, or adopted children. In addition, there may be up to two roomers or boarders.

  2. Two single parents or guardians with no more than a total of six of their dependent children, including natural children, foster children, step children, or adopted children, functioning as a single housekeeping unit.

  3. A group of not more than four persons not necessarily related by blood or marriage living as a single housekeeping unit.