Seattle requires replacement planting when trees are removed, with ratios scaled by the size and tier of the removed tree under SMC 25.11, and an in-lieu payment option when on-site replanting is not feasible.
When trees are removed under permit, Seattle's Tree Protection Ordinance requires replacement planting at ratios that increase with the size and tier of the removed tree. Tier 1 trees (6-12 inches) generally require 1:1 replacement. Tier 2 trees (12-24 inches) require replacement at higher ratios, typically 2:1 or 3:1 depending on species and circumstances. Exceptional trees (24+ inches) require the highest replacement ratios if removal is approved. Replacement trees must be a minimum caliper size (typically 1.5 to 2 inches) and planted on the same lot where feasible. If on-site planting is not feasible due to space constraints, an in-lieu payment to the city's tree fund is required, which finances tree planting elsewhere in Seattle. Replacement trees must be maintained for a minimum establishment period, typically 3 years, with replacement of any that die during that period.
Failure to plant required replacement trees after permitted removal can result in fines and additional enforcement action. Removing trees without proper replacement planning may result in retroactive penalties calculated at enhanced ratios. Trees removed illegally face the highest replacement requirements plus monetary penalties.
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Side-by-side rule comparisons with other cities in King County.
See how other cities in King County handle tree replacement requirements.
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