Simi Valley Signage Rules Rules (2026): What You Need to Know

Simi Valley Development Code Chapter 9-26 establishes the conditions under which a Home Occupation Permit may be granted and maintained. Among these conditions is an absolute prohibition on exterior signage. No sign, nameplate, placard, display board, or advertising device — illuminated or non-illuminated, permanent or temporary — may be affixed to, placed upon, or made visible from the exterior of the residence. This includes window lettering or decals visible from the street, yard signs, door placards, fence-mounted displays, sandwich boards placed near the curb, and any other visual element that would indicate to a passerby that a business is operating at the location. The overriding goal is that the property must appear entirely residential at all times.

The signage prohibition extends to commercial vehicles. A van, truck, trailer, or personal vehicle bearing a business logo, vinyl wrap, painted graphics, roof sign, or magnetic placard must not be routinely stored at the residence in a manner that effectively advertises the business to the street. Code Compliance staff distinguish between incidental parking of a branded vehicle and the deliberate or habitual use of a driveway or street frontage to display commercial graphics. Where a wrapped vehicle is parked daily and prominently visible from the sidewalk or street, enforcement may treat it as an exterior sign in violation of the home occupation conditions, regardless of whether any separate stationary sign is posted.

Simi Valley does not provide the small-scale exemptions found in some other California jurisdictions — there is no allowance for a one-square-foot nameplate or a small professional identification plaque near the front door. Business owners who require any form of exterior identification for clients or the public must obtain a commercial address. Complaints regarding home occupation signage violations are handled by the Simi Valley Environmental Services Department, Planning Division and Code Enforcement. The Planning Division can be reached at (805) 583-6769.