Los Angeles County Sign Regulations: Window Signs Rules (2026)

Title 22.140.430 classifies window signs as on-premise signs that do not require a separate sign permit if they meet area limits and content rules. Total signage on any single window pane cannot exceed 25 percent of the glass area. Flashing, blinking, scrolling, or animated electronic window displays are prohibited in residential-adjacent commercial corridors. Permanent neon and LED signs require an electrical permit through Building and Safety. Temporary paper signs for sales or events may run up to 30 consecutive days without permit but must remove within seven days of expiration. Coverage from interior shelving and product displays counts toward the 25 percent threshold. Contract cities apply their own window sign rules.