Rohnert Park, CA Home Business: Signage Rules (2026)

110(A)(1), a home occupation is only allowed in a residential district if it holds a city business license, and the license cannot be granted unless every criterion in the section is met. Subsection (c) requires that there be no exterior indication of a home occupation at all: the dwelling cannot be altered in appearance and the operator cannot use colors, materials, construction, lighting, or signs that make the residence look different from its original residential character. Subsection (d) extends the ban to outdoor storage, parking, or display of any vehicles, equipment, materials, or supplies tied to the business, with one exception: a single business vehicle, up to one-ton capacity, may carry the operation's signage and be kept at the property.

Read together, the two subsections mean a resident running a licensed home business cannot post a yard sign, window sign, or illuminated sign, and cannot repaint or remodel to look commercial, but can letter a single work truck or van with the company's name. 110(A)(1) are conditions of licensure rather than free-standing prohibitions, planning and community development staff can deny or revoke a home occupation business license outright if a sign appears on the property itself. This provision applies only inside Rohnert Park city limits; it has no bearing on Sonoma State University property at the city's edge or the Graton Resort and Casino, both outside city zoning jurisdiction.