Siskiyou County, CA Home Business: Signage Rules (2026)

Siskiyou County's Home Occupation Use Permit conditions strictly limit signage for home-based businesses in the unincorporated county. Under the usual conditions of approval, one sign - not exceeding six square feet (for example, 2 feet by 3 feet) - may be attached to the building. Freestanding or roof-mounted signs are not permitted. The signage limit works together with the broader requirement that a home occupation must not change the outside appearance of the structure in a way that conflicts with the residential appearance of surrounding homes, and that outside display or storage is not permitted. These conditions are designed to keep home businesses visually compatible with their residential neighborhoods and to prevent commercial-style advertising in residential and agricultural districts. The single attached sign is the only on-site advertising the County's standard conditions allow for a home occupation; larger, illuminated, or detached signs are characteristic of commercial uses and are not part of a permitted home occupation. Property owners should also be aware that additional conditions may be added to a permit after review by County agencies, and that any sign should comply with the approved plot plan submitted with the application. For signage questions tied to a specific parcel or proposed business, contact the County Planning Division.