Hawthorne, CA Sign Regulations: Window Signs (2026)

35 splits window signage into two tracks. 110(G), may cover no more than twenty-five percent of the area of the window on which they are displayed, with no separate permit-count cap described for that category. 240(N) and are treated more strictly: every twenty-five square feet of temporary window sign area, or any fraction of it, requires its own sign permit from the director of building and safety, though the code sets no cap on how many such permits a business can hold at once. The cumulative area of all temporary window signs on a business is capped at whichever is least: twenty-five percent of the window area, two hundred square feet per building wall segment where the windows sit, or one square foot of sign per lineal foot of total window length in that wall.

Window area itself is measured using the outside dimensions set by perimeter frames, mullions, and building facade divisions, not interior decorative trim, and the calculation folds together every temporary window sign displayed, regardless of number or combination. The clock on display time is cumulative too: the number of signs multiplied by the days each is displayed cannot exceed thirty days per calendar year, so a business cannot dodge the limit by rotating several signs. 400.