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

Because Glenn County defines a home occupation (Title 15, Ch. 15.780) as a use that 'does not change the character' of the dwelling and is 'clearly incidental and secondary' to residential use, exterior signage that would advertise or display the business is restricted. The Unified Development Code regulates signs through its sign provisions, and exempt residential nameplates are limited in size - for example, the County's residential sign provisions allow small name plates (on the order of a couple of square feet) identifying the resident, not a commercial business sign. There should be no exterior evidence (such as illuminated, animated, or oversized signs, display windows, or storefront-style signage) that the dwelling is being used for anything other than a residence. Any sign associated with a home business must be reviewed against the County's adopted sign standards in Title 15 and against the Chapter 15.780 home-occupation conditions. Because the precise allowable sign dimensions for a home occupation are set by the sign chapter and any permit conditions, owners should confirm the exact permitted size, lighting, and placement with the Glenn County Planning Division before installing any sign. Sign rules differ for properties in commercial and agricultural zones, so verify your parcel's zoning.