Multnomah County, OR Landscaping Rules: Weed Ordinances (2026)

(7) Uncontrolled or uncultivated growth of weeds, brush, or grasses which offer vector or rodent harborage, contribute noxious pollens to the atmosphere, constitute a fire hazard or produce toxins that are harmful to humans, pets, livestock or wildlife.

(8) Any explosive or radioactive substance unless the possession is authorized by law.

(9) Any vacant building, left unsecured and unattended and accessible to the public.

(10) An open pit, well, quarry, cistern, excavation or other hole of a depth of four feet or more and a top width of 12 inches or more without reasonable safeguards or barriers to prevent them from being accessible to children.

(11) Dead or decaying trees and tree limbs that present a safety hazard to the public or to the abutting property owners.

(12) A fence, barrier, partition or obstruction located in a residential zone, except RL-C or F-2, and which is partially or totally constructed with barbed wire or is electrically charged in such a manner as to transmit an electrical shock or charge upon contact.

(13) Any abandoned vehicle upon private or public property unless the owner of the property is lawfully authorized to operate a business specifically for that purpose.

(14) Signs, hedges, shrubbery, natural growth or other obstructions at or near intersections which hinder the view necessary for the safe operation of vehicles.

(15) Obstruction to public sidewalks or roadways by trees, bushes, roots, other natural growth, soil or solid waste.