Smoke and CO Alarm Maintenance: Landlord Duties Ontario

Smoke and carbon monoxide alarms keep tenants safe, and in Ontario landlords have clear legal duties to install, maintain, and repair them. This guide explains what renters and landlords each must do, when a landlord may enter a unit to check or replace alarms, and how tenants can document problems and request prompt fixes. It also outlines the relevant section of the Residential Tenancies Act, the Landlord and Tenant Board process, and the official forms and contacts tenants may need to resolve urgent safety or maintenance disputes. Use the practical steps here to protect your household, preserve evidence, and know when to escalate a safety issue to municipal fire services or the Landlord and Tenant Board.

Who is responsible for alarms in Ontario?

Under Ontario rules, landlords are generally responsible for ensuring smoke alarms and carbon monoxide alarms are installed and in working order at the start of a tenancy and maintained thereafter. Tenants must keep alarms in working condition while occupying the unit, for example by notifying the landlord about dead batteries or faults so the landlord can repair or replace the device. For formal disputes or urgent unresolved safety problems you can contact the Landlord and Tenant Board for information on applications and remedies.^[1] The primary statute that governs rental relationships in Ontario is the Residential Tenancies Act, 2006.^[2]

Where and what alarms are required

Provincial and municipal fire codes set minimum locations for smoke and CO alarms. Typical requirements include alarms outside sleeping areas, on each storey of a unit, and where fuel-burning appliances are present. Check municipal fire code guidance for local specifics and installation standards.

Landlord duties: installation, maintenance and records

• Install and maintain working smoke and carbon monoxide alarms in the unit and required common areas.
• Replace batteries and replace alarms when they reach end-of-life; act within reasonable timeframes after a tenant reports a fault.
• Keep records of inspections, maintenance and replacements to show compliance with safety obligations.
• Provide proper written notice before entering a rental unit to test or replace alarms unless it is an emergency.
• Address safety faults immediately; alarms that do not work present a serious risk and should be fixed without delay.

Timing and entry rules

Landlords must give notice before routine entries to inspect, test or replace alarms, except in emergencies. Reasonable advance notice is usually 24 hours unless local rules say otherwise. If a landlord needs quicker access for an urgent safety repair, they can enter without the usual notice rules but should document the reason and action taken.

What tenants should do

Tenants should report alarm problems in writing, provide access for lawful inspections or repairs, and document communications and the fault itself with photos or video. If a landlord does not respond to a safety issue, tenants may apply to the Landlord and Tenant Board or contact local fire services for immediate danger. You can learn more about general hazards and tenant health and safety expectations in the guide Health and Safety Issues Every Tenant Should Know When Renting.

• Document the fault with photos or video and note the date and time.
• Tell the landlord in writing about the problem and request a repair or replacement; keep a copy of the message.
• Allow reasonable access for the landlord or approved contractors to test or replace alarms after proper notice.
• If the issue is not resolved, contact the Landlord and Tenant Board for next steps or call municipal fire services if there is immediate risk.

For more on general obligations of each party during a tenancy, see Obligations of Landlords and Tenants: Rights and Responsibilities Explained.

FAQ

Do landlords have to install smoke and CO alarms in Ontario?

Yes. Landlords must install and maintain alarms as required by provincial and municipal rules; tenants should report issues promptly and allow access for repairs.

Can a landlord enter my unit to check or replace an alarm?

Yes, but the landlord must usually provide proper written notice for routine entry. In emergencies they may enter without the standard notice, but should document the emergency reason and action taken.

What can I do if my landlord doesn’t fix a faulty alarm?

Document the problem, send a written request for repair, and if the landlord does not act you can apply to the Landlord and Tenant Board or contact municipal fire services for immediate danger.

How-To

1. Photograph or record the alarm problem and note the date, time and any symptoms (e.g., frequent beeping).
2. Send a written request to your landlord asking for repair or replacement and keep a copy as evidence.
3. Agree to reasonable access so the landlord can test or replace the alarm after proper notice; ask for a receipt of work done.
4. If the landlord does not fix the alarm within a reasonable time, consider applying to the Landlord and Tenant Board for an order or contact local tenant services for help.^[1]
5. If you believe there is immediate danger from smoke or carbon monoxide, leave the unit and call 911 or your local fire services right away.

Help and Support / Resources

• Contact the Landlord and Tenant Board for case information, forms and dispute applications.
• Read the Residential Tenancies Act, 2006 text for legal duties and tenant protections.
• Review Ontario government guidance on smoke and carbon monoxide alarm requirements and safety.

1. [1] Landlord and Tenant Board (Tribunals Ontario)
2. [2] Residential Tenancies Act, 2006 (e-Laws)
3. [3] Smoke and carbon monoxide alarms guidance (Ontario.ca)

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