National City, CA Sign Regulations: Political Signs (2026)

The Regulatory Sign Ordinance in the Land Use Code (Title 18, Chapter 18.47) treats political speech as protected noncommercial speech. Under § 18.47.060, every legal residential dwelling unit gets a defined cumulative display area that is available at all times, and political/election signs are named among the permissible message types alongside other constitutionally protected noncommercial speech. Residential signs can be freestanding or mounted on doors, walls or fences. Flag poles cannot exceed twenty-five feet of cumulative linear footage, and roof-mounted signs are prohibited.

The area limits are the core of the rule. Outside the election period, the maximum display area is sixteen square feet per parcel per frontage, counted as the cumulative total of all signs subject to the cap. Street address indicators, occupant names and images mounted on the ground, such as door mats, are not counted. During the election period, the code says there is no limit on the maximum display area. Section 18.47.040 defines that period as beginning sixty days before a special, general or primary election in which at least some registered voters in the city are eligible to vote, and ending ten days after the election. The maximum sign size of six square feet per sign applies at all times, so a large banner does not become legal just because an election is near. Special illumination of residential signs is prohibited; they are lit only by natural and legal ambient lighting.

Section 18.47.030 sets the message neutrality policy: National City regulates signs without favoring commercial speech over noncommercial speech and does not regulate protected noncommercial speech by message content. A noncommercial message can be substituted for an allowed message, but only with the private property owner's consent and only if the sign structure or mounting device is legal. Section 18.47.020 limits the chapter to signs on private property where the city has land use authority. Signs on city land fall under Chapter 13.28, and signs used with parades, protests, demonstrations and outdoor public assemblies are regulated as temporary uses under Chapter 15.60. Under § 18.47.090, temporary signs must carry the name and valid contact information of whoever posted them, in type at least ten point, so the city can call the responsible person and allow a cure.