In addition to the definitions in San Francisco Building Code Chapter 2, the following definitions shall apply for purposes of this Chapter:
DWELLING UNIT. A dwelling unit shall include any individual residential unit within either an R-1 or an R-2 occupancy building. It shall also include a guestroom, with or without a kitchen, within either a tourist or residential hotel or motel but shall not include a “housekeeping room.” A dwelling unit shall include an area that is occupied as a dwelling unit, whether such is approved or unapproved for residential use.
STORY. The first story of any building shall be considered a story, whether or not previously exempted from story count under an earlier edition of the San Francisco Building Code.