Portland encourages cool-roof and ecoroof installations through Title 33 zoning incentives and BES stormwater credits, addressing urban heat island effects and combined-sewer overflow reduction simultaneously.
Portland's Ecoroof Program, administered by BES, offers stormwater fee discounts and density bonuses for vegetated and reflective roofing on commercial and multifamily buildings. The Stormwater Management Manual recognizes ecoroofs as approved on-site stormwater facilities, while Title 33 grants floor-area bonuses in central-city zones. Cool-roof specifications align with Oregon Reach Code voluntary standards and PCEF retrofit grants for low-income residential conversions, supporting the city's climate-resilience goals during heat-dome events.
No fines apply for choosing a conventional roof, but improperly installed ecoroofs that fail stormwater performance forfeit fee discounts and may require BES-approved corrective work.
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See how Portland's cool roof requirements rules stack up against other locations.
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