Landscaping Rules in Kirkland, WA (2026)
8 verified landscaping rules for Kirkland, Washington, sourced directly from the municipal code and official government pages.
Verified from official government sources
Grass Height Limits
Kirkland has no fixed grass height limit but KMC Chapter 1.12 nuisance provisions allow code enforcement of overgrown vegetation that harbors rodents, fire risk, or obstructs sight lines at intersections.
Kirkland Grass Height and Lawn Maintenance
Few RestrictionsTree Trimming
Routine tree pruning in Kirkland needs no permit, but major topping or removing 30 percent or more of a significant or heritage tree canopy requires review under KZC Chapter 95.
Kirkland Tree Trimming and Pruning
Some RestrictionsTree Removal & Heritage Trees
Kirkland requires a tree removal permit under KZC Chapter 95 to remove any significant tree (6 inches DBH or larger) or heritage tree; replacement plantings are typically required at a 1:1 or greater ratio.
Kirkland Tree Removal Permit Requirements
Heavy RestrictionsWeed Ordinances
Kirkland enforces King County Noxious Weed Control Board regulations under RCW 17.10; property owners must control Class A and designated Class B weeds including knotweed, tansy ragwort, and poison hemlock.
Kirkland Noxious Weed Control
Some RestrictionsWater Restrictions
Kirkland water comes from Cascade Water Alliance via Seattle Public Utilities; during declared shortage stages, residents must follow the regional Cascade Water Shortage Contingency Plan restrictions.
Kirkland Water Use and Drought Restrictions
Some RestrictionsRainwater Harvesting
Rainwater harvesting is legal in Kirkland for outdoor irrigation under WA Ecology Policy 1017; residential potable use requires a plumbing permit and treatment under state rules.
Kirkland Rainwater Harvesting Rules
Few RestrictionsWA Department of Ecology Rainwater Use Interpretive Policy (Policy 1017)
Rainwater collection. Rainwater collection, including the use of rain barrels, has become more popular as a supplemental source of water. In 2009, we issued a rainwater use interpretive policy, which clarifies that you may use water collected from your rooftop without a water right permit. However, there are rules on using rainwater as a potable (drinkable) water source. Some counties in Washin...
Native Plants
Kirkland encourages native Pacific Northwest plant landscaping through its Green Kirkland Partnership and the required landscape standards of KZC Chapter 95, which credit native and drought-tolerant species.
Kirkland Native Plant Landscaping
Few RestrictionsArtificial Turf
Artificial turf is allowed on Kirkland residential lots but rarely counts toward required landscape area under KZC 95, and is restricted in critical areas and Lake Washington shoreline zones.
Kirkland Artificial Turf Rules
Some RestrictionsLooking for King County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Kirkland city rules.
Landscaping Rules in King County →