Snohomish County has no set grass-height limit for residential yards, but every property owner must eradicate Class A noxious weeds and control designated Class B and C noxious weeds under state law, enforced by the county Noxious Weed Control Board.
Unlike many cities, unincorporated Snohomish County does not cap lawn height by ordinance. Weed regulation instead flows from state law: RCW 17.10.140 requires every owner to eradicate Class A noxious weeds and control listed Class B and C weeds within and from their property. RCW 17.10.020 creates a noxious weed control board in each county; the Snohomish County Noxious Weed Control Board publishes the local weed list and, when owners fail to comply, may control the weeds and charge the cost back to the owner. Ordinary overgrown grass alone is generally not a code violation unless it harbors listed noxious weeds or creates a nuisance.
If an owner fails to comply, the county weed board may control noxious weeds or contract for control at the owner's expense (RCW 17.10).
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Snohomish County, WA
Snohomish County prohibits cruelty, neglect, and abandonment of animals under SCC 9.12.080. Failing to provide adequate food, water, shelter, sanitation, med...
Snohomish County, WA
Snohomish County's animal code does not set a general backyard wildlife-feeding ban. Feeding large carnivores such as bears and cougars is prohibited by Wash...
Snohomish County, WA
Snohomish County has no ordinance banning backyard composting, and it is encouraged for yard waste. In the unincorporated county, residential solid-waste and...
Snohomish County, WA
Snohomish County has no ordinance prohibiting or specifically permitting artificial turf in residential yards. In required development landscaping, the code ...
Snohomish County, WA
Snohomish County does not require native landscaping for homeowners, but Title 30 rewards it: development landscape plans that use Puget Sound indigenous spe...
Snohomish County, WA
Rooftop rainwater collection for outdoor use is allowed in Snohomish County with no water-right permit, following Washington's 2009 state policy. Storage tan...
See how Snohomish County's weeds & overgrown grass rules stack up against other locations.
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