All districts
Home occupations are an accessory use in the one family districts (Section 3.03.D), the R-2 district (Section 4.03.D), and mobile home parks (Section 5.01.C). Six limits apply: only permanent residents of the dwelling may work in it; the use must stay wholly inside the dwelling, not in a garage or outbuilding; no alterations, equipment, or machinery uncommon in homes; no more than 20 percent of the floor area of the house; no sign of any nature; and no traffic or parking beyond what a home normally generates (Section 3.03.D.1-6).
The multiple family articles (Articles 6 and 7) do not list home occupations as an accessory use, so apartment-based businesses are not clearly authorized; ask the Office of Planning before operating one from a multiple family unit.