How Portland Handles Sign Regulations: A Practical Guide
Portland maintains 126 local ordinances across all categories, and 2 of those deal specifically with sign regulations. Here is a breakdown of what the city actually requires, what is prohibited, and where Portland falls on the strict-to-permissive spectrum compared to other cities.
Window Signs
Storefront window signage in Portland can't exceed 50% of the window's area: temporary and permanent signs, including painted or perforated-vinyl designs, all count toward that cap. Window signs are limited to first- and second-story windows, must be displayed on the interior, and unlike most permanent signs, don't need a sign permit under Land Use Code § 19.7.2, Table 19-Q.
Key details: Coverage cap: 50% max of window area, combined signage. Eligible floors: 1st and 2nd story windows only. Placement: Must mount on interior of window. Illumination: Neon or single-/two-color LED only. Permit: No sign permit required (§ 19.3.3).
Exceeding the 50% window-coverage cap, mounting a sign outside the glass instead of on the interior, or placing window signage above the second story violates Table 19-Q even though no permit is required. The Building Authority enforces the Land Use Code, and Chapter 1, § 1-15's general penalty, $100 to $500 per offense, with each day a separate offense, applies absent a more specific fine.
Digital Billboards
Portland's Land Use Code allows only one electronic message sign per lot, and it can't flash, blink, or show video: each changing message must hold for at least 30 seconds. Automatic photocell dimming must cap night luminance at 100 nits at full brightness, and the display has to shut off by 10 p.m. under § 19.6.3.G.
Key details: Signs per lot: One electronic message sign per lot. Motion: No flashing, blinking, or video messages. Message duration: Minimum 30 seconds per displayed message. Night brightness cap: 100 nits maximum at full white. Shutoff: Off by 10 p.m. or close of business, first to occur.
An electronic message sign that flashes, shows video, holds a static message for less than 30 seconds, exceeds the 100-nit night cap, or stays lit past 10 p.m. violates § 19.6.3.G and is enforced by the Building Authority. As with other Land Use Code offenses, Chapter 1, § 1-15 sets a general penalty of $100 to $500 per offense, with each day of noncompliance a separate offense.
The Bottom Line
Portland's sign regulations rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Portland is broadly strict or permissive.
All of the above reflects Portland's municipal code as of our last review. If you need specifics on fines, exemptions, or filing requirements, the detailed ordinance pages linked above have the full breakdown.