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.
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Multnomah County, OR
Multnomah County has no countywide leaf blower ordinance. Portland adopted a phased gas leaf blower ban under City Code Title 18 and Ordinance 191370 (2022),...
Multnomah County, OR
Commercial vehicles on county-maintained roads in unincorporated Multnomah County are subject to Oregon state commercial vehicle regulations (ORS Title 59, O...
Multnomah County, OR
Driveways in unincorporated Multnomah County that access county roads require an approach permit from Multnomah County Land Use and Transportation. Vehicles ...
Multnomah County, OR
Multnomah County does not have a specific RV parking ordinance for unincorporated areas beyond Oregon state law. Oregon state law (ORS 197.493) addresses RV ...
Multnomah County, OR
Parking on county-maintained roads in unincorporated Multnomah County is governed by Oregon state traffic laws and county road rules. Abandoned vehicles may ...
Multnomah County, OR
Multnomah County enforces abandoned vehicle rules under MCC 14.700 on county roads and unincorporated areas. Portland PCC 16.30 applies within city limits. O...
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