Portland's Title 11 (Trees) requires replacement plantings when permitted tree removal occurs. Replacement ratios range from 1:1 for smaller trees to 3:1 or higher for larger trees. In flood hazard areas, replacement ratios are 3:1 to 6:1 based on tree size. The 2025 code amendments increased replacement requirements.
When a tree is removed with a permit, the property owner must plant replacement trees at ratios specified in Title 11. Standard replacement is at least one tree for each tree removed, with larger trees requiring higher ratios (up to 3:1 for very large trees). Trees removed in the 100-year flood hazard area require replacement at 3:1 to 6:1 ratios per the 2024 PICM amendments. Replacement trees must meet minimum caliper standards and be planted within the specified timeframe. If on-site planting is not feasible, the owner may pay into the city's tree fund. Portland's Urban Forestry program monitors compliance with replacement requirements.
Failure to plant required replacement trees results in additional penalties and potential liens on the property. The city may plant replacement trees and assess costs to the property owner. Non-compliance extends the violation period and increases penalties.
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See how Portland's tree replacement requirements rules stack up against other locations.
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