1208.3.1 Habitable rooms and spaces.
BC § 1208.3.1
Every habitable room or space shall have not less than 80 square feet (7.4 m 2 ) in net floor area. Exceptions: 1. A room that complies with the requirements for natural light and natural ventilation and in addition has an unobstructed opening of not less than 60 square feet (5.6 m 2 ) into an immediately adjoining room shall have not less than 70 square feet (6.5 m 2 ) of net floor area.
2.A habitable dining space, as defined by the New York City Housing Maintenance Code, that complies with the requirements for natural light and natural ventilation may have less than 80 square feet (7.4 m 2 ) of net floor area.
3.A room in a Group R-1 dwelling unit shall have not less than 60 square feet (5.6 m 2 ) of net floor area.
