2 county-level rules, plus city-specific rules for 1 city in Multnomah County, Oregon.
Verified from official government sources
Portland requires outdoor lighting to use full-cutoff, downward-directed fixtures under PCC 33.130.215. Commercial lighting cannot exceed 0.5 foot-candles at residential property lines. Oregon has no statewide dark-sky statute, but Multnomah County's SEC overlays (Columbia Gorge, Sandy River) apply dark-sky best practices. LED color temperature generally limited to 3000K or below to reduce sky glow and protect bird migration along the Pacific Flyway.
Multnomah County regulates light trespass through the Zoning Code exterior lighting standards in MCC 39.6400, requiring fixtures to be fully shielded and limiting illumination at residential property lines. Portland enforces PCC 33.262.070 (Outdoor Lighting) and PCC 33.510 Central City light standards. Oregon Department of Transportation standards govern state highway lighting. Complaints are investigated by county Land Use & Transportation Code Compliance or Portland's Bureau of Development Services.
1 cities in Multnomah County have their own outdoor lighting rules. Each link goes to that city's dedicated page with code citations.
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