There are seven ways that more than one person can live in a residence in Fairfax County, according to the zoning ordinance:
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 and with not to exceed two roomers or boarders.
2. Two single parents or guardians with not 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 functioning as a single housekeeping unit.
4. A group residential facility.
5. Any group housekeeping unit which may consist of not more than 10 persons as may be approved by the Board of Zoning Appeals.
6. One person or two persons one of whom shall be elderly and/or disabled, and one or both of whom own the dwelling unit, plus one family, which may consist of one person or two or more persons related by blood or marriage, and with any number of natural children, foster children, step children or adopted children.
7. A bed and breakfast, as may be approved by the Board of Supervisors.