Concord, CA Home Business: Zoning & Home Occupation Permits (2026)

100 is the standards-for-specific-uses provision in Title 18 (Development Code) that governs every home occupation in Concord. The Planning Division's permit acknowledgement form, signed and stamped by the City, reproduces the operative criteria verbatim. (1) Location: the business must be conducted entirely within the principal dwelling, within an enclosed structure attached to the dwelling, or within a legally permitted and constructed enclosed accessory structure detached from the dwelling, excluding required garage parking area. (2) Floor area cap: the space exclusively devoted to the business, including any related storage, shall not exceed 20 percent of the dwelling unit's habitable square footage as determined by county tax records.

m. ); an administrative permit may authorize up to six nonstudent clientele per day, one at a time, as an exception. (5) Vehicles: a maximum of one business vehicle up to one-ton capacity is permitted, and only if it does not give the appearance that a business is being conducted on site. Limousines, dump trucks, tow trucks, modified pick-up trucks with raised hauling compartments, construction vehicles, trailers, construction equipment, and any vehicle over one ton are expressly prohibited. m. (7) Nuisances: the business shall not create noise, odor, dust, vibration, smoke, electrical disturbance, or any other interference with adjacent residential uses, and shall be invisible to the neighborhood, with no excessive use of, or unusual discharge into, water, sanitary sewer, electrical, garbage, or storm drains.

(8) Prohibited businesses: automotive service, diagnosis, or repair of vehicles, large machinery, equipment, or large appliances of others; beauty salons and barber shops; and any cannabis business or commercial activity are categorically banned as home-based uses. 100's structural, employee, and traffic criteria. State ADU law (Gov. 100 when the ADU is used for business purposes.