Kirkland's Tree Protection: The Rules That Matter

Every city handles tree protection a little differently. In Kirkland, Washington, there are 2 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.

Heritage & Protected Trees

Kirkland classifies any regulated tree with a trunk 26 inches or more in diameter as a landmark tree, and KZC 95.23 bars removing one from public or private property without a tree removal permit and an approved mitigation plan. Owners who cut one down must replant three trees per landmark tree removed or pay a $450 per-tree fee.

Key details: Landmark tree threshold: 26-inch DBH or greater. Mitigation ratio: 3 replacement trees per landmark tree. Fee in lieu: $450 per required mitigation tree. Banking limit: Max 2 landmark trees per 24 months. Maintenance term: 5-year recorded maintenance agreement.

Removing a landmark tree without a permit is a code enforcement matter handled by Kirkland's Planning and Building Department, which can require restoration plantings and pursue fines under Chapter 95's enforcement provisions (KZC 95.55). Skipping the mitigation plantings or the $450-per-tree fee in lieu leaves the obligation outstanding and can hold up final inspection on any related development permit until the five-year maintenance agreement is recorded.

Parkway Planting

Kirkland requires street trees spaced 30 feet on-center in the landscape strip between curb and sidewalk on improved rights-of-way, with City-approved species, a 2-inch planting caliper, and a ban on paving or parking on the strip.

Key details: Tree spacing: 30 feet on-center. Minimum planting caliper: 2 inches in diameter. Canopy clearance: 6 feet above finished grade. Alternate spacing (no strip): 30 ft on-center, 2.5 ft behind sidewalk. Species approval: Required from Public Works Director.

It is a violation of the code to pave or cover the landscape strip with impervious material or to park motor vehicles on the strip. Planting the wrong species, skipping Public Works Director approval, or failing to meet the 2-inch caliper and 30-foot spacing standard can hold up final inspection and occupancy on a development project subject to Chapter 110 KZC improvements.

The Bottom Line

Kirkland's tree protection rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Kirkland is broadly strict or permissive.

These rules come from Kirkland's publicly available municipal code. For complete penalty schedules, exemption details, and answers to common questions, see the individual ordinance pages throughout this guide.