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

Signage for home-based businesses in unincorporated Trinity County is governed by Chapter 17.30B of the zoning code. For minor home occupations, Section 17.30B.060(A)(6) provides that signage shall be limited to one "residential nameplate sign." For major home occupations, Section 17.30B.060(B)(5) provides that signage shall be limited to one "appurtenant sign." The chapter references the County's sign standards (cited as Section 30.1, Sign Standards) for the exact definitions and dimensional limits of those sign types; those specific size figures are set in the sign-standards provisions rather than restated in the home-occupation chapter, so an applicant should obtain the current dimensions directly from the Planning Department. Separately, the zoning code's district regulations limit other on-site signs; for example, real-estate signs advertising the sale or lease of the property are generally limited to about six square feet in aggregate per building site under district rules (e.g., 17.17.040). Because sign limits differ by sign type, by home-occupation tier, and by zoning district, anyone advertising a home business should confirm the allowed number, size, lighting, and placement of signs with the Trinity County Planning Department before installing signage.