Auburn, WA Landscaping Rules: Tree Removal & Heritage Trees (2026)

Under Auburn City Code Chapter 18.76 (Tree Preservation), removal of any significant tree on private property requires a tree removal permit from Auburn Community Development. A significant tree is generally defined as 6 inches or greater DBH for deciduous and most conifers, with protected species such as Garry oak and Pacific madrone having stricter thresholds. Residential property owners may remove up to two significant trees per year without replacement under the small-parcel exemption, though a no-fee permit may still be required. Trees beyond the annual allowance, or removals related to development, require replacement on a 1-to-1 to 3-to-1 ratio depending on size and species. Hazard trees (dead, diseased, structurally unsound, or posing imminent risk) may be removed through an expedited process with a certified arborist report. Trees in critical area buffers (wetlands, streams, steep slopes, shorelines) under ACC 16.10 and the Shoreline Master Program require a critical area permit. Unpermitted removal can trigger civil penalties up to $5,000 per tree plus mandatory replacement planting under ACC 18.76. Street trees in the public right-of-way are managed by Auburn Public Works; a ROW work permit and urban forester approval are required for any removal.