Important: This article is general information, not legal advice. Ontario rental rules and available remedies depend on the tenancy, condition, notices, evidence, and current law. Use official Landlord and Tenant Board resources or qualified legal help for advice on a specific situation.
Maintenance responsibility
The Ontario Landlord and Tenant Board states that a landlord is responsible for providing and maintaining a residential complex and rental unit in a good state of repair, fit for habitation, and compliant with health, safety, housing, and maintenance standards. Tenants are generally responsible for cleanliness and for undue damage they cause.
A moisture or mould concern should be evaluated based on its cause and conditions. A leak, building-envelope issue, plumbing issue, ventilation issue, or tenant-caused damage may require different information and responses. Avoid assuming responsibility or a legal result before the condition is documented.
Practical steps for tenants
- Record the condition safely. Take dated photographs and notes describing location, odours, leaks, or water damage. Do not disturb suspect material.
- Notify the landlord in writing. Describe the condition, location, and any active water source. Keep a copy of the message and any reply.
- Allow reasonable access as required by law. Discuss inspection and repair arrangements in writing where possible.
- Escalate safety concerns appropriately. Contact emergency services, a utility, or local public health resources where an immediate hazard or contamination is involved.
- Use official information before taking tenancy action. The LTB provides materials about maintenance and repairs, filing, and its forms and procedures.
The LTB advises tenants to write to the landlord asking them to fix a problem and keep a copy of that correspondence before filing an application. See the LTB's Help for Tenants page (opens in a new tab) for current official resources.
Practical steps for landlords
A written record of the complaint, observations, access arrangements, investigation, and any work performed can help everyone understand what happened. When conditions need specialized work, the scope should identify the observed moisture issue, affected areas, safety measures, and who will address the underlying cause.
Do not rely on painting over a damp or mould-affected surface as evidence that the underlying issue is resolved. Health Canada emphasizes locating and correcting excess moisture. If a tenant needs to be temporarily displaced or extensive work is contemplated, confirm the appropriate legal process using current official information before issuing notices or agreements.
Tenant Relocation Due to Mold in Ontario
Whether a tenant needs to leave a unit while work is performed depends on the observed condition, the work scope, safety directions, and the tenancy facts. This article cannot determine whether relocation is required, permitted, or what process applies to a particular tenancy. Use current official resources or qualified legal advice before making a decision or signing an agreement.
Do I have to move out while mold is removed from my rental?
Not necessarily. Ask what condition has been found, what safety measures are proposed, which rooms are affected, how long the work is expected to take, and what official tenancy information applies. Keep the answers and any agreement in writing.
How long does a landlord have to fix mold in Ontario?
The Landlord and Tenant Board says landlords are responsible for maintaining rental housing in a good state of repair. A general article cannot set a deadline for a specific concern, so document the condition, notify the landlord in writing, and review current official guidance for the tenancy.
Keeping useful records
Records can be useful for a maintenance conversation, insurance question, or official process. Keep:
- dated photos and videos of visible conditions;
- written notices, replies, and access arrangements;
- inspection findings and proposed scopes of work;
- receipts, invoices, and a record of work completed; and
- notes about any ongoing leak, odour, or recurrence.
A property inspection can document accessible building conditions; it cannot provide legal or medical conclusions. For inspection questions, see mould inspection and inspection versus testing.
Where to get official help
The Landlord and Tenant Board (opens in a new tab) publishes current information about maintenance and repairs, forms, filing, and dispute-resolution processes. It also directs users to Navigate Tribunals Ontario and legal-help resources. For health questions, consult a healthcare professional or local public-health resource. For moisture and mould safety information, consult Health Canada's homeowner guide (opens in a new tab).
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