Smoke Alarms & CO Rules: Ontario Landlord Fines

Landlord Compliance & Penalties Ontario 3 min read · published March 09, 2026 Flag of Ontario

Tenants in Ontario rely on working smoke alarms and carbon monoxide (CO) detectors for safety, and landlords have legal duties to install and maintain them. This guide explains what renters should expect, common landlord responsibilities, and the fines or orders landlords may face for non-compliance under provincial rules. You’ll find clear steps to document problems, how to notify your landlord, when to contact municipal fire services or the Landlord and Tenant Board, and what forms or evidence help a tenant’s case. Practical tips show how to protect your living space and preserve your rights while staying cooperative and safe. Keep records and act quickly.

What Ontario requires

Under provincial rules, landlords must ensure rental units have working smoke alarms and carbon monoxide detectors where required by code and the Residential Tenancies Act[1]. That means installing, testing and maintaining alarms, replacing batteries when needed, and responding to tenant reports in a reasonable time. Tenants should expect alarms in hallways, sleeping areas, and near fuel-burning appliances depending on the building type. For more on landlord duties and tenant expectations see Obligations of Landlords and Tenants: Rights and Responsibilities Explained.

In most regions, tenants are entitled to basic habitability standards.

Common landlord responsibilities

  • Install and maintain working smoke alarms and carbon monoxide detectors in required locations.
  • Repair or replace alarms and replace batteries promptly after a tenant reports a fault.
  • Keep records of tests, maintenance, and replacement dates so tenants and inspectors can verify compliance.
  • Respond to tenant reports and arrange any inspections within a reasonable timeframe and with proper notice.

If a landlord fails to comply, municipalities or the province can issue orders or fines and tenants can apply to the Landlord and Tenant Board for remedies[2]. Local fire departments may also issue compliance orders or carry out safety inspections under the Fire Code and municipal by-laws[3].

Respond to safety issues promptly and keep copies of all notices you send or receive.

When you spot a problem, document it with photos, dates and short notes about what you heard or saw. If the landlord does not act, a written request creates a clear record and helps if you later file a complaint or an LTB application.

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Practical steps tenants can take

  • Document the issue: take photos of alarms, note times and describe noises or failures.
  • Notify your landlord in writing and request repair or replacement, keeping a copy of the message.
  • Give reasonable time for the landlord to respond, and follow up if there is no action.
  • Contact local fire services if you believe there is immediate danger or to report a code violation.
  • If necessary, apply to the Landlord and Tenant Board or seek local tenant assistance to request orders or compensation.
Keep all rent receipts and correspondence organized in one folder.

FAQ

Do landlords have to install smoke alarms and carbon monoxide detectors in Ontario?
Yes. Landlords must ensure working smoke alarms and CO detectors are installed where required by law and maintained in working order. See provincial rules for exact locations and types of detectors.
What can I do if my landlord doesn’t fix a faulty alarm?
Document the problem, send a written request, and allow reasonable time for repair. If the landlord does not act, contact municipal fire services for immediate risks and consider filing an application with the Landlord and Tenant Board.
Can landlords be fined for not complying?
Yes. Municipalities and regulators can issue fines or orders, and the Landlord and Tenant Board can order repairs or compensation depending on the situation.

How-To

  1. Gather evidence: take dated photos, note the issue, and keep records of any related problems.
  2. Send a written request to your landlord describing the problem and the remedy you want, and keep a copy.
  3. Wait a reasonable time for the landlord to fix the issue, and send a polite reminder if there is no response.
  4. Contact your local fire department for immediate danger and the Landlord and Tenant Board for unresolved disputes.
  5. If you apply to the Board, include your evidence, copies of requests, and any repair invoices or reports.

Key Takeaways

  • Landlords must provide and maintain working smoke and CO alarms to meet Ontario safety rules.
  • Document problems, notify your landlord in writing, and keep all records.
  • If repairs aren’t made, you can contact fire services and the Landlord and Tenant Board for remedies.

Help and Support / Resources

If you are also searching for a new rental while resolving safety issues, consider Houseme - your rental solution in Canada to find listings and neighbourhood information.


  1. [1] Residential Tenancies Act, 2006
  2. [2] Landlord and Tenant Board forms and guides
  3. [3] Smoke alarms and carbon monoxide alarms information

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David Chen
David Chen

Tenant Law Analyst, Tenant Rights Canada

David specializes in Ontario residential tenancy law and Northern territories housing regulations. He has followed developments at the Landlord and Tenant Board closely for over eight years and writes extensively on LTB procedures, rent increases, and maintenance obligations.