Clark County, WA Landscaping Rules: Weed Ordinances (2026)
Key Facts
- Weed statute
- RCW 17.10.140
- Class A weeds
- Must be eradicated
- Class B/C weeds
- Control per county list
- Local program
- County Noxious Weed Control
- Lawn-height number
- No county-wide limit
Summary
Washington law RCW 17.10.140 requires every Clark County property owner to eradicate Class A noxious weeds and control designated Class B and C weeds. The county nuisance code also targets vegetation that harbors debris or creates hazards.
Every owner must perform or cause to be performed those acts as may be necessary to: (a) Eradicate all class A noxious weeds; (b) Control and prevent the spread of all class B noxious weeds designated for control in that region within and from the owner's property.
Full Breakdown
There is no simple county-wide lawn-height number in unincorporated Clark County; instead the enforceable duty is the state noxious weed law. RCW 17.10.140 requires owners to eradicate all Class A weeds and control and prevent the spread of Class B weeds designated for control in the region plus locally listed Class B and C weeds. The Clark County Noxious Weed Control Program administers the county weed list and complaints. Overgrown vegetation that conceals junk or becomes a fire or sight hazard can also be addressed under CCC 9.24 nuisance provisions.
Violations & Fines
Noxious weed enforcement under RCW 17.10 can require owner control and, if ignored, county action and cost recovery. Vegetation nuisances are abated under CCC 9.24.
Frequently Asked Questions
Is there a maximum grass height?
What must I do about noxious weeds?
Sources & Official References
Other rules in Clark County
How Clark County compares: Cities with the Strictest Weed and Property Maintenance Rules·Compare Clark County to another location·View the Washington landscaping rules overview
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