How Do I Deal With a Tenant's Unauthorized Pet?

An unauthorized pet is a breach of the lease, not a personal insult, and treating it as one makes enforcement harder. The tenant agreed to a pet policy and then broke it. Your job is to enforce the lease consistently, the same way you would for any violation, without turning the situation into a grudge match.

Start by confirming the facts. Have you actually seen the pet, or is it secondhand information? Note the type, size, and where the pet is kept, because the specifics determine how you respond and what the notice should say. A stray the tenant is fostering for a week is different from a permanent new dog.

Check your own records at the same time. Does the lease clearly prohibit the pet? Was there a pet addendum you signed that the tenant might have relied on? If the lease language is ambiguous about whether this pet is covered, the enforcement you attempt will be weak from the start.

When the violation is confirmed, send a written notice that states the pet, the lease clause it violates, and the deadline to cure. Pennsylvania's standard for a lease violation other than nonpayment is 15 days' written notice to correct the problem, and this is the framework to follow. State that the tenant must remove the pet or correct the situation by the deadline, or face further action.

Keep the notice factual and specific: the date, the pet, the clause, the cure, and the deadline. Do not list a string of past grievances; the notice is about the unauthorized pet, and a clean, single-issue notice is easier to enforce and harder to dispute.

Serve it in writing with proof of delivery and keep a copy. If the tenant removes the pet within the window, document the cure and close the file with a note. If they do not, the notice is the foundation for the next step, a lease-violation eviction if the problem persists.

Pet Policies That Prevent the Problem

The best handling of an unauthorized pet is a policy that makes it less likely. Write the pet rules plainly in the lease: which pets are allowed, the approval process, the deposit and any pet rent, and the statement that unapproved animals violate the agreement. Give the tenant the pet addendum at signing so there is no confusion about what approval means.

Consider whether a reasonable pet policy serves you better than a complete ban. Allowing pets with a deposit attracts a larger pool of responsible applicants, and it turns the unauthorized-pet conversation into an enforcement of the written process rather than a surprise discovery.

Beyond the legal process, decide what outcome you actually want, because the notice alone does not manage the relationship. If you would never allow any pet, hold the line consistently and follow through. If the tenant otherwise pays on time and keeps the unit well, consider whether a pet addendum with a pet deposit or pet rent serves you better than accelerating toward an eviction over a dog.

Many landlords convert the unauthorized pet into an authorized one: the tenant signs a pet addendum, pays the agreed pet deposit, and the tenancy continues. That outcome enforces your policy, corrects the violation, and keeps a good tenant, which is often cheaper and less disruptive than starting over with a vacancy.

Whatever you choose, apply the same policy to every tenant. Consistent enforcement is not only fair; it protects you if a former tenant ever claims they were singled out.

Fair housing law separates service and emotional support animals from pets, and a no-pets lease does not apply to them. A tenant with a disability who needs a service animal, or an emotional support animal as a reasonable accommodation, is entitled to keep the animal even under a no-pets policy, and you cannot charge a pet deposit or pet rent for it.

You can request limited verification for an emotional support animal, such as reliable documentation of the disability-related need, while a service animal assisting with a visible need generally needs no documentation. You cannot ask for details about the tenant's disability, and you cannot impose breed or weight restrictions on assistance animals.

If a tenant raises the accommodation, respond in writing, engage in the interactive process, and document the decision. Refusing a legitimate accommodation, or charging pet fees for an assistance animal, is a fair housing violation that a pet-dispute eviction would never justify.