Mold and Infestation Management for Ontario Tenants

Maintenance & Repairs Ontario 3 min read · published March 09, 2026 Flag of Ontario

As a tenant in Ontario, understanding your rights and responsibilities when dealing with mold or infestations is crucial. These issues not only affect your health but also your enjoyment of the rental property. The Tenant Rights in Ontario protect you under the Residential Tenancies Act, 2006. Knowing how to address these problems can greatly improve your rental experience.

Understanding Mold in Rental Properties

Mold is a common problem in many homes, and it can range from mild irritation to severe health issues. In Ontario, landlords are required to ensure that rental properties meet health and safety standards, including the management of mold. If you suspect mold in your rental unit, it is vital to take action immediately.

Steps to Take if You Find Mold

  • Notify your landlord in writing about the mold issue as soon as you notice it.
  • Request an inspection to determine the source and severity of the mold.
  • Document the mold with photos and notes on its location and extent.
  • If necessary, contact your local health department for further guidance.
Under Ontario law, landlords must maintain the rental unit in a good state of repair and fit for habitation. Mold remediation is typically the landlord’s responsibility when mold results from disrepair or structural issues; keep written records of all notices and remediation steps, and consult the local health department if the issue is not addressed promptly.
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Dealing with Pest Infestations

Pests can be a significant nuisance and pose health risks. In Ontario, landlords should address pest issues promptly to maintain habitable living conditions. Tenants, on the other hand, must keep their rental units clean to prevent infestations.

Tenant Responsibilities and Rights

Common mistake: tenants delay reporting pest issues hoping they’ll go away. Prompt, written reporting helps protect your rights and gives the landlord a clear timeline for inspection and treatment.

For more detailed solutions and tenant rights regarding pests, see Dealing with Pests in Your Rental: Tenant Rights and Effective Solutions.

Legal Framework and Action Steps

The Residential Tenancies Act, 2006 serves as the primary legal framework governing landlord and tenant duties concerning maintenance issues in Ontario. If you face persistent issues, you might consider leveraging the Landlord and Tenant Board to resolve disputes. Find out more about Ontario's Landlord and Tenant Board here.

Nuance: disputes are often clarified by documenting timelines and early communication with the landlord; while the board can order remedies, it's usually better to show a clear history of requests and responses.

Key Takeaways

  • Act promptly on mold and infestations by notifying your landlord.
  • Understand your rights and obligations under the Residential Tenancies Act, 2006.
  • Use resources like the landlord and tenant board for unresolved disputes.

Need Help? Resources for Tenants

If you require further assistance, contact Ontario's Landlord and Tenant Board or your local community legal clinic. These resources can provide guidance and legal support to help address your concerns.

What to bring when seeking help: your tenancy agreement, a log of mold or pest issues with dates, copies of notices or repair requests, and any photos or inspection reports. Present these documents to a community legal clinic or at a Landlord and Tenant Board hearing to support your claim.

  1. How do I report mold in my rental? Begin by notifying your landlord in writing. If unaddressed, contact the local health department or the landlord and tenant board.
  2. What should I do if I find pests in my rental? Clean your space to reduce pest attractions and report the issue to your landlord immediately for treatment action.
  3. Who pays for mold removal in a rental property? Generally, landlords are responsible for addressing mold if it results from structural issues or natural disasters.

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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.