How Portland Handles Outdoor Lighting: A Practical Guide
Portland maintains 144 local ordinances across all categories, and 2 of those deal specifically with outdoor lighting. 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.
Dark Sky Rules
Along the Willamette River, Portland's zoning code bans upward-facing exterior lights and requires full opaque shielding on light fixtures.
Key details: Governing zone: River Overlay zone (Willamette River). Shielding: 100% opaque, top and sides. Max color temp: Below 3000K. Upward/side light: Prohibited. Citywide glare cap: 0.5 foot-candles (§ 33.262.080).
Enforced through Bureau of Development Services zoning code compliance; non-shielded or upward-facing fixtures within the River Overlay zone are a code violation subject to correction orders.
Light Trespass & Shielding
Portland caps glare from nonresidential lighting at 0.5 foot candles measured on a neighboring property and bans strobe lights visible from adjacent land, under the city's off-site impacts standards for commercial and industrial zones.
Key details: Glare limit: 0.5 foot candles on neighbor's land. Strobe lights: banned if visible off-site. Applies to: R, C, CI, IR, OS zone nonresidential uses. Measured from: property line or affected property. Exempt: equipment in place before rule took effect.
Confirmed glare violations shift measurement costs to the violator, and unpaid charges are themselves a Code violation enforced under Title 22, Portland's general code enforcement chapter.
The Bottom Line
Portland's outdoor lighting 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.