Siskiyou County, CA Sign Regulations: Garage Sale Signs (2026)

Siskiyou County does not appear to publish a sign rule written specifically for garage or yard sales. Temporary, off-premises directional signs such as garage-sale signs fall under the general sign standards in Article 58 (Sign Regulation) of the county Zoning Code (Title 10, Chapter 6). The 2025 Zoning Code Audit confirms the county regulates signs in a content-neutral manner consistent with State law, so a garage-sale sign is treated the same as any other temporary noncommercial or directional sign rather than under a special category. The most important practical limit is on placement: signs may not be placed within the right-of-way of any state highway, and the California Outdoor Advertising Act (Business and Professions Code, including Section 5405.3 for temporary signs) authorizes Caltrans to remove unlawful signs from or near the state-highway system, which includes the Interstate 5 and State Route corridors crossing the county. Posting signs on utility poles, traffic-control devices, or other public property is generally prohibited. Because exact size, duration, and placement standards depend on the specific zoning district and the Article 58 text, owners should confirm the current requirements with the Siskiyou County Planning Division before posting temporary sale signs along county roads.