An animal addendum to a lease is a separate document, signed by you and your landlord and attached to your existing rental agreement, that sets out the specific terms for keeping an animal in the unit. It names the animal, lays down behavioral rules, assigns responsibility for damage, and spells out any pet-related money you owe on top of rent. Once signed, it becomes part of the lease and overrides any conflicting general language, including a blanket no-pets clause.
What the Addendum Puts in Writing
The first job of the addendum is to identify the animal. You’ll usually list the type, breed, name, weight, age, and sometimes color or markings. That specificity matters: the approval attaches to that animal, not to a general right to have a pet. If you later get a second animal or replace the first, you typically need a new addendum or an amendment.
Behavioral rules come next. Common ones include leash requirements in shared spaces like hallways and courtyards, noise limits (especially for dogs), waste cleanup duties, and areas of the property that are off-limits. Many addendums require current vaccinations and proof of local licensing, because an unvaccinated animal that bites someone exposes the landlord to liability too.
The addendum also makes you responsible for damage the animal causes, beyond ordinary wear and tear. Scratched floors, chewed door frames, stained carpet, torn screens. Most addendums say this outright so there’s no argument at move-out about whether the security deposit stretches to cover pet damage.
Pet Deposits, Pet Fees, and Pet Rent
Three different charges show up in animal addendums, and they are not interchangeable. Read the labels carefully before you sign.
- Pet deposit. Refundable, held against pet-related damage. In many states it counts toward the overall security deposit cap, so it can’t push your total deposits past the legal maximum. Some states allow a separate pet deposit on top of the general one. Limits vary widely by jurisdiction.
- Pet fee. A one-time, non-refundable charge. Not every state allows non-refundable fees, so whether this is legal depends on where you rent. Where it is allowed, the amount is often at the landlord’s discretion.
- Pet rent. An extra monthly charge, usually in the range of $10 to $50 per animal. Generally legal everywhere, and meant to cover ongoing wear from having an animal in the unit.
These charges stack. A $300 pet deposit, a $200 pet fee, and $35 a month in pet rent comes to more than $900 across the first year on top of your regular rent and security deposit. Confirm in writing which charges are refundable and which aren’t before you sign.
Breed, Weight, and Screening Restrictions
Many addendums restrict certain dog breeds. Pit bulls, Rottweilers, German Shepherds, Dobermans, and similar breeds commonly appear on restricted lists. These restrictions often trace back to the landlord’s insurance carrier rather than personal preference: some homeowner’s and landlord policies either exclude certain breeds entirely or charge much higher premiums for them.
Weight caps are common too. A 25-pound limit effectively rules out most large-breed dogs regardless of how calm the individual animal is. Any size and breed limits should be stated plainly in the addendum so you know what qualifies before you bring an animal home.
Expect some kind of screening. Many landlords now run pet applications alongside tenant applications, which may require vaccination records, references from a prior landlord, or an in-person meeting with the animal. Some use third-party pet screening services that charge roughly $20 to $35 per animal and assign a rating based on breed, size, age, and behavior history. Those screening fees usually come out of your pocket.
How the Addendum Interacts With Your Lease
Once both parties sign, the animal addendum is a legally binding part of the lease. It modifies the original agreement, so if the lease says “no pets” but the addendum approves your specific dog, the addendum controls that point. Specific terms override general ones.
To hold up, the addendum needs the same formalities as the lease. Both parties should sign and date it, it should reference the original lease by date and property address, and both should keep a copy. An unsigned addendum, or one that contradicts the lease without clearly stating it is meant to override, won’t protect either side in a dispute.
The terms also have to comply with local law. A clause imposing a $5,000 non-refundable pet fee in a state that caps security deposits at one month’s rent likely won’t survive a legal challenge. Signing the document doesn’t let a landlord override tenant protection statutes.
Service Animals and Emotional Support Animals Sit Outside the Addendum
This is the point most tenants get wrong. Service animals and emotional support animals are not pets under federal law, and a pet addendum does not apply to them. The Fair Housing Act prohibits landlords from discriminating against tenants with disabilities and requires reasonable accommodations for assistance animals. 1U.S. Department of Housing and Urban Development. Assistance Animals The Americans with Disabilities Act, which many people assume governs this area, covers public accommodations like restaurants and hotels but does not apply to private residential housing. 2U.S. Department of Justice. Service Animals and Assistance Animals
Under the Fair Housing Act, landlords cannot charge pet deposits, pet fees, or pet rent for assistance animals, 3U.S. Department of Housing and Urban Development. Fact Sheet on HUD Assistance Animals Notice and they cannot apply breed or weight restrictions to them. A no-pets lease still has to allow an assistance animal as a reasonable accommodation. 4Office of the Law Revision Counsel. 42 USC 3604 – Discrimination in the Sale or Rental of Housing and Other Prohibited Practices If your disability and the need for the animal aren’t obvious, the landlord can request documentation from a healthcare provider with personal knowledge of your condition. The right is not absolute: a landlord can deny the request if the specific animal poses a direct threat to others that can’t be reduced through another accommodation, or would cause significant property damage that can’t be mitigated. 1U.S. Department of Housing and Urban Development. Assistance Animals You remain responsible for any damage the animal does; the landlord simply can’t collect a deposit up front against the possibility.
What Happens If You Violate the Addendum
Bringing in an unauthorized animal or breaking the terms of an existing addendum is a lease violation. The usual sequence starts with a written notice identifying the problem and giving you a deadline to cure it. The length of that deadline depends on lease type and local law; month-to-month tenants generally get shorter notice than long-term tenants.
If you fix the issue in time (remove the animal, address the behavior), that normally ends things. If you don’t, the landlord can move to financial penalties under the addendum or to termination of the lease. The landlord cannot change locks or remove your belongings. Eviction requires a court order and the formal legal process behind it.
Some landlords will instead offer to approve the animal after the fact through a new addendum with a deposit and pet rent, because eviction is expensive and slow for them too. Don’t count on it. Treating the addendum as optional is a reliable way to end up in an eviction proceeding.
What to Check Before You Sign
A few places in these documents trip tenants up more than they should:
- Total cost over the lease term. Add the pet deposit, pet fee, and monthly pet rent across the full term. A modest-sounding $30 a month is $360 on a one-year lease.
- Refundability. Anything called a “deposit” should be refundable minus legitimate damage costs. Anything called a “fee” you should assume is gone.
- Damage liability beyond the deposit. Most addendums make you responsible for damage beyond what the pet deposit covers, meaning more money could come due at move-out.
- Removal clauses. Some addendums let the landlord require the animal be removed after repeated behavioral violations like noise complaints or aggressive incidents. Know what triggers that and how much notice you’d get.
- Insurance requirements. Some landlords require renters insurance with a set liability limit, or want to be named as an additional insured. Standard renters liability coverage typically runs $100,000 to $300,000, but some policies exclude certain dog breeds, so check what yours actually covers.
- Number of animals. If you might add a second animal later, see whether the addendum caps the number. Adding one without approval is a lease violation.
Read the addendum with the same attention you give the lease. The pet-specific terms are where most end-of-tenancy money disputes start, and where both sides most often feel blindsided.