Multnomah County enforces noxious weed abatement under ORS 105.550 to 105.570 and Oregon Department of Agriculture OAR 603-052. Portland City Code 29.20 requires property owners to remove tall grass and noxious weeds over 10 inches. Armenian blackberry, English ivy, knotweed, and garlic mustard are priority invasives. The Portland Bureau of Development Services Nuisance Inspection Team handles complaints.
Multnomah County uses the state authority in ORS 105.550 through 105.570 to compel abatement of overgrown vegetation and noxious weeds. Portland's Property Maintenance Regulations under PCC 29.20.030 require that grass, weeds, and rank vegetation not exceed 10 inches in height on any portion of a residential lot visible from a public way, and prohibit noxious weeds designated by the Oregon Department of Agriculture (ODA) under OAR 603-052-1200. Portland's priority list includes Armenian (Himalayan) blackberry, English ivy, Japanese knotweed, garlic mustard, giant hogweed, and false-brome. The Portland Bureau of Development Services (BDS) Nuisance Inspection Team investigates complaints, issues a 10-day notice, and can abate at the owner's expense with administrative fees added as a property lien. Gresham Municipal Code 7.10 and Troutdale Code 8.05 contain parallel standards. Unincorporated Multnomah County enforces through County Code MCC 25 Nuisance provisions. The Four-County CWMA (Cooperative Weed Management Area) coordinates regional invasive species efforts. ODA can require landowners to treat Class A/B listed weeds under ORS 569.175, particularly in agricultural areas.
Portland grass/weed violation: 10-day notice, then $280 civil penalty plus abatement billed to owner. BDS abatement fees typically $350 to $1,500 depending on lot size, placed as lien. Noxious weed non-abatement on ODA order: up to $2,500 per violation.
Gresham, OR
Gresham addresses barking dogs through noise and animal control ordinances. Persistent barking that disturbs neighbors is a violation enforceable through Cod...
Gresham, OR
Gresham permits construction activities between 7 AM and 10 PM per GRC §7.20. Construction noise outside these hours is prohibited in residential areas.
Gresham, OR
Gresham Revised Code §7.20 regulates noise. Residential areas must not exceed 50 dBA between 10 PM and 7 AM, or 60 dBA between 7 AM and 10 PM at the property...
Gresham, OR
Gresham regulates on-street parking with time limits in certain areas. Vehicles must be currently registered and operable. Abandoned vehicles are subject to ...
Gresham, OR
Gresham requires driveways to meet development code standards. Vehicles must not block sidewalks or extend into the public right-of-way. Driveway modificatio...
Gresham, OR
Gresham restricts commercial vehicle parking in residential zones. Large commercial vehicles and heavy equipment may not be stored in residential areas.
Side-by-side rule comparisons with other cities in Multnomah County.
See how other cities in Multnomah County handle weed ordinances.
See how Gresham's weed ordinances rules stack up against other locations.
Quick Compare
Help us keep this page accurate. If you notice an error or outdated information, let us know.