North Carolina smoke and carbon monoxide alarm rules: operable at every tenancy, 15 days to fix and 10-year batteries
N.C.G.S. 42-42 requires a North Carolina landlord to provide operable smoke alarms, and carbon monoxide alarms where a unit has a fossil-fuel appliance or an attached garage. They must be operable and in good repair at the beginning of each tenancy, and the landlord must repair or replace within 15 days after the tenant's written notice.
What are the smoke alarm duties?
The landlord provides operable smoke alarms with a recognized testing-lab listing, installed to NFPA standards or the manufacturer's instructions, and keeps or provides proof of compliance. The alarm must be operable and in good repair at the beginning of each tenancy. Unless the parties agree otherwise in writing, the landlord places new batteries in battery-operated alarms at the start of the tenancy, and the tenant replaces batteries as needed, except for tamper-resistant 10-year lithium alarms.
After written notice from the tenant, the landlord repairs or replaces the alarm within 15 days. When installing or replacing an alarm after December 31, 2012, the landlord must use a tamper-resistant, 10-year lithium battery alarm, with exceptions for a hardwired alarm that has battery backup or a combined smoke and CO alarm meeting the CO rule.
What are the carbon monoxide duties?
A CO alarm is required in dwelling units with a fossil-fuel burning heater, appliance or fireplace, and in any unit with an attached garage. The landlord provides at least one operable alarm per rental unit per level, listed to ANSI/UL2034 or ANSI/UL2075, and one per unit per level satisfies the location and number requirements. The same start-of-tenancy, battery and 15-day repair rules apply as for smoke alarms. A tenant's failure to replace batteries is not treated as negligence by either party. A CO alarm may be combined with a smoke alarm if it meets both standards and clearly distinguishes the two hazards, and operable CO detectors installed before January 1, 2010 are deemed compliant.
Example a made-up owner in Raleigh rents a two-level townhouse with a gas furnace. The owner supplies one working CO alarm per level, records the model and date, and places fresh batteries at move-in.
Is there a testing schedule?
No. The section requires alarms to be operable at the start of each tenancy and repaired or replaced after written notice of a problem, but does not set a schedule for testing either type. A landlord who wants evidence can test at each turnover and record it.
Where North Carolina owners slip
Two slips are common. One is skipping the proof: the statute asks the landlord to keep or provide proof of compliance, so a dated photo and a model number matter. The other is replacing an alarm with a cheap battery model after 2012, when the replacement standard calls for a tamper-resistant 10-year lithium battery alarm or one of the listed exceptions. Also count the 15 days from the tenant's written notice, not from the day you read it. Keep a form letter ready that acknowledges the notice, names a repair date and attaches nothing a tenant has to sign.
Move-in paperwork that proves compliance
Put three items in each tenant's move-in packet: a dated list of the alarms in the unit with their locations and model numbers, a note stating whether you installed fresh batteries and when, and a one-page instruction on testing and on how to give written notice of a problem. Have the tenant sign it. When a written notice arrives, acknowledge it the same day, count 15 days, and finish early. That paper trail is the proof of compliance the statute expects you to keep or provide.
How DoorKeeping fits in North Carolina
DoorKeeping keeps a North Carolina unit's alarm checks as dated work orders with photos, so the move-in test, the tenant's reports and your fixes are on the record. Each tenant notice carries its date, which starts the 15 days. This is general information, not legal advice. Check the current statute, your local fire code and your lease before you act.
Sources
Questions
- How fast must a North Carolina landlord fix a smoke alarm?
- Within 15 days after the tenant's written notice.
- Which North Carolina units need carbon monoxide alarms?
- Units with a fossil-fuel burning heater, appliance or fireplace, and any unit with an attached garage.
- Who changes batteries in a North Carolina rental?
- The landlord puts in new batteries at the start of a tenancy unless otherwise agreed in writing; the tenant replaces them as needed, except for tamper-resistant 10-year lithium alarms.