Issaquah Tree Removal Permit & Ordinance Guide
King County, Washington
Protected Tree Definition
Significant tree: 6+ inches DBH for conifers, 8+ inches DBH for deciduous. Landmark trees designated separately for exceptional size or historical significance.
Heritage / Landmark Trees
Landmark trees designated for exceptional size, species, age, or community value.
Permit Requirements
Tree Retention Plan required during development review. Tree removal permits required for significant trees outside approved activity.
Who can apply: Property owner or authorized agent with arborist report
Required Report Sections
Tree inventory with DBH, species, condition, retention plan, replacement plan
Replacement Requirements
Based on retention percentage (typically 30-35% for residential)
On-site replacement required; fee-in-lieu when infeasible.
Fees & Fines
Processing Time
4-8 weeks
Required Certifications
ISA Certified Arborist
Municipal Code
Issaquah Municipal Code Chapter 18.12 (Tree Retention)
View full ordinanceContact
Development Services Department
(425) 837-3100
Nearby Cities in King County
Other Washington cities
Compare with nearby cities
Data last verified: April 2026. This information is provided as a reference. Always verify requirements directly with Issaquah before submitting permits or reports.
Ready to apply? How to apply for a permit in Issaquah →
See Washington replacement obligations compared: How Issaquah's replacement ratio ranks in Washington →
See Washington heritage criteria compared: How Issaquah's heritage designation ranks in Washington →
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