The number of tenant violations a landlord may tolerate will likely depend on the:
Tenancy laws in their province or territory
Nature of the violations
Terms of the lease
For minor lease violations, such as late rent payments, landlords should make a decision based on the severity and frequency of the violations. They should also consider the unique details of the situation. A tenant who’s consistently late on rent payments is annoying, but eviction might not be worth the trouble if their lease term is nearly up.
For more serious infractions, such as conducting illegal businesses on the property, landlords may have grounds for immediate eviction. However, it's crucial to follow the proper legal procedures and document the violations appropriately. Be sure to consult your local laws to confirm whether you can pursue an eviction.