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What smoke and carbon monoxide alarm rules apply to landlords in Oregon?
Short answer
Carbon monoxide alarms: required before a new tenancy where there is a CO source; give written testing instructions at move-in
When: Before each new tenancy (units with or connected to a carbon monoxide source); testing instructions no later than move-in
If a unit contains a carbon monoxide source, or is connected by a door, ductwork or ventilation shaft to a room with one, the landlord may not start a new tenancy unless properly working CO alarms are installed. Give the tenant written testing instructions no later than move-in, supply working batteries at the start of a new tenancy, and repair or replace a deficient alarm after written notice from the tenant.
"a landlord may not enter into a rental agreement creating a new tenancy in the dwelling unit if the dwelling unit: (a) Contains a carbon monoxide source; or" oregonlegislature.gov
"The landlord shall provide the written notice to the tenant no later than at the time that the tenant first takes possession of the premises." oregonlegislature.gov
"the landlord shall supply working batteries for the alarm at the beginning of a new tenancy." oregonlegislature.gov
Carbon monoxide alarms: required before a new tenancy where there is a CO source; give written testing instructions at move-in Verified
Deadline: Before each new tenancy (units with or connected to a carbon monoxide source); testing instructions no later than move-in
If a unit contains a carbon monoxide source, or is connected by a door, ductwork or ventilation shaft to a room with one, the landlord may not start a new tenancy unless properly working CO alarms are installed. Give the tenant written testing instructions no later than move-in, supply working batteries at the start of a new tenancy, and repair or replace a deficient alarm after written notice from the tenant.
"a landlord may not enter into a rental agreement creating a new tenancy in the dwelling unit if the dwelling unit: (a) Contains a carbon monoxide source; or" oregonlegislature.gov
"The landlord shall provide the written notice to the tenant no later than at the time that the tenant first takes possession of the premises." oregonlegislature.gov
"the landlord shall supply working batteries for the alarm at the beginning of a new tenancy." oregonlegislature.gov
Notes: ORS 90.316 and 90.317.
Last verified 2026-10-24 · Confidence: high · Status: verified · Report a correction