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

Under Lassen County Code Chapter 18.102 (General Provisions and Exceptions), a home occupation is allowed one nonilluminated sign that shall not be larger than three square feet. On parcels smaller than twenty thousand square feet, the sign must be attached to a building and shall not be freestanding. On parcels of twenty thousand square feet or larger, the sign may be freestanding. In any case, the sign shall not be located in the sight-distance area (the corner/intersection visibility triangle protected for traffic safety). The prohibition on illumination keeps the sign consistent with the surrounding residential character, which is a core requirement of the County's home-occupation standards - the activity must not change the exterior residential appearance of the dwelling or accessory buildings. Beyond the home-occupation sign, general sign regulations in the Zoning Code apply to other uses. Because the standard is built into the home-occupation provisions rather than a fee-based sign permit program, the main constraint is the size, count, attachment, illumination, and placement rules above. Owners with a unique parcel configuration should confirm placement with Planning and Building Services before installing a sign.