Smoke & CO Alarm Rules for Ontario Landlords

If you rent out property anywhere in Toronto or the GTA, the landlord smoke alarm rules in Ontario put the legal duty for working alarms squarely on you, not your tenant. Under the Ontario Fire Code, landlords must install and maintain smoke alarms on every storey and outside sleeping areas, and carbon monoxide alarms wherever there is a fuel-burning appliance or an attached garage. Getting rental smoke alarm law wrong is not a paperwork slip, it is an offence that carries real fines.

What is the landlord's legal duty?

The Ontario Fire Code (O. Reg. 213/07), made under the Fire Protection and Prevention Act, is the law that governs alarms in rental housing. It makes the owner, which for a rental unit means the landlord, responsible for providing and maintaining working smoke and carbon monoxide alarms. This duty applies to houses, basement apartments, duplexes, condo units you lease out, and multi-unit buildings across Scarborough, North York, Etobicoke, Mississauga, Vaughan, Markham and Richmond Hill.

Maintaining an alarm means more than screwing it to the ceiling. You must keep it in operating condition, replace dead batteries, and replace the unit itself at the end of its service life, typically about ten years from the manufacture date. If a tenant reports a chirping or faulty alarm, acting on it promptly is part of your legal obligation, not a courtesy. For a broader view of your obligations, see our Ontario Fire Code compliance checklist.

Where are alarms required in rentals?

Ontario law sets clear minimum locations. Meeting them is the baseline for tenant fire safety, and inspectors check these exact spots.

• Smoke alarms: on every storey of the unit and outside each sleeping area. In many rentals this means the hallway serving the bedrooms plus one on any additional level, including a finished basement.
• Carbon monoxide alarms: adjacent to each sleeping area if the unit or building has a fuel-burning appliance (gas furnace, water heater, stove or fireplace) or an attached storage garage. This reflects Ontario's CO-alarm law.
• Interconnection: newer construction often requires interconnected alarms so that one triggering sounds them all, which the Ontario Building Code addresses at the time of build or renovation.

Correct placement matters as much as quantity. Our guides on carbon monoxide detector requirements and smoke and CO alarm installation walk through mounting distances, dead-air spaces and combination units in detail.

Who maintains them, landlord or tenant?

This is where disputes arise, so it is worth stating plainly. The landlord installs, tests and maintains the alarms. The tenant's role is limited but important: keep the alarm in place, do not remove batteries or cover the unit, and report any problem right away. A landlord cannot download the maintenance duty onto a tenant through a lease clause, because the Fire Code obligation stays with the owner.

Practically, most landlords test alarms at the start of every tenancy and periodically during it, giving proper notice of entry as required under the Residential Tenancies Act. Keeping working alarms across a portfolio of units is far easier when a qualified technician handles testing and replacement on a schedule, the same way we manage fire alarm inspection and testing for larger buildings.

Documentation and proof

If a fire happens, or if an inspector visits, the question is not just whether alarms existed but whether you can prove you maintained them. Records are your defence. Keep a simple, dated log for each unit covering installation, tests, battery changes, tenant sign-offs at move-in, and any replacements. Photographs of installed alarms with visible model and date labels are useful supporting evidence.

Here is a practical maintenance and record-keeping schedule landlords can follow. Alarm intervals below reflect common manufacturer and code guidance; always follow the specific device instructions.

Penalties for non-compliance

Failing to provide working smoke or carbon monoxide alarms is an offence under the Fire Protection and Prevention Act. Fire inspectors can issue tickets or lay charges, and penalties can be substantial for individuals, with much larger maximum fines available against corporations. Beyond the fine itself, a missing or disabled alarm can expose a landlord to civil liability and can complicate an insurance claim after a loss.

The takeaway is simple: treat every alarm requirement as mandatory and non-negotiable. The cost of compliant alarms and a testing schedule is trivial next to the cost of a charge, and far smaller than the human cost the rules exist to prevent. Landlords running multiple properties often fold alarm checks into a broader annual fire inspection so nothing slips.

Get a rental compliance check

Whether you own a single basement apartment in Scarborough or a portfolio of units across the GTA, a professional check confirms you have the right alarms in the right places, that they work, and that you have the paperwork to prove it. Tovic Fire serves Toronto and the Greater Toronto Area, aligns to ULC, NFPA, CSA and TSSA standards, and performs City of Toronto permitted work. If you also lease commercial or mixed-use space, our fire protection for condos guidance covers the shared and in-suite requirements that apply. Ready to book? Request a site assessment and we will handle the rest.

Frequently asked questions