A service animal addendum is a written modification to your lease that formalizes a Fair Housing Act accommodation to keep an assistance animal in a rental that otherwise restricts animals. On the landlord’s side, it waives pet fees, pet deposits, monthly pet rent, and any breed, size, or species rules that would normally apply.1U.S. Department of Housing and Urban Development. Assistance Animals On your side, it confirms you are responsible for the animal’s behavior and any damage it causes. The document exists so both parties have a clear record of what was approved and on what terms.
What the Addendum Actually Puts in Writing
The addendum modifies the existing lease rather than replacing it. It identifies the specific animal that has been approved, states that pet-related rules in the lease no longer apply to that animal, and lays out the tenant’s continuing obligations. Because an assistance animal is not a pet under federal law, the landlord cannot use the addendum to attach a pet deposit, pet rent, or a pet fee to the accommodation.1U.S. Department of Housing and Urban Development. Assistance Animals Breed, weight, and species limits that apply to pets also fall away.2HUD Exchange. Can a Public Housing Agency Restrict the Breed or Size of an Assistance Animal A building that bans pit bulls, for example, still has to consider a reasonable accommodation for a tenant whose assistance animal is a pit bull.
What the landlord can put in the addendum is the ordinary conduct that any resident is expected to meet: keep the animal under control, clean up after it, and pay for damage beyond normal wear and tear.
Who Can Request One
The Fair Housing Act uses the term “assistance animal,” which is broader than the Americans with Disabilities Act definition of a service animal. Assistance animals under the FHA include both trained service dogs and untrained animals that provide therapeutic emotional support, and they can be any common domestic household animal rather than dogs alone.1U.S. Department of Housing and Urban Development. Assistance Animals A cat that helps a tenant manage anxiety symptoms can qualify, as can a small dog that has no formal training. Requests involving unusual animals, such as reptiles, birds, or primates, receive more scrutiny, and the tenant may need to explain specifically why that type of animal is necessary.
In housing, then, whether your animal is a task-trained service dog or an emotional support cat, the landlord evaluates the request through the same reasonable accommodation process. The stricter ADA rules govern places like restaurants and stores, not your rental.
Documentation You Need to Provide
How much paperwork you owe depends on whether your disability and the need for the animal are obvious. If both are apparent, the landlord should approve the request without asking for documentation. A tenant who uses a wheelchair and has a dog trained to open doors, for instance, should not be asked for a doctor’s letter.
When the disability or the animal-related need is not obvious, which is the situation for most emotional support animal requests, the landlord may ask for documentation of two things:
- A qualifying disability: a physical or mental impairment that substantially limits a major life activity.
- A disability-related need: the specific animal provides therapeutic support that alleviates a symptom or effect of that disability.
The strongest documentation is a letter from a licensed healthcare professional who has an existing therapeutic relationship with you. The letter should confirm the disability and explain how the animal helps.3U.S. Department of Housing and Urban Development. Fact Sheet on HUD Assistance Animals Notice The provider needs personal knowledge of your condition, meaning they have actually diagnosed, treated, or counseled you rather than skimmed a questionnaire.
What the Landlord Cannot Ask For
There are firm limits. A landlord cannot require your specific diagnosis, detailed medical records, or a medical examination.4U.S. Department of Housing and Urban Development. FHEO Assistance Animals Notice 2020 They cannot insist that the healthcare provider use a particular form, notarize the letter, or write it under penalty of perjury. They cannot demand training, certification, or registration for the animal. No legitimate federal or state registry for assistance animals exists, and websites selling one are scams.
Online ESA Letters
HUD has taken a direct position on the certificates sold by websites that issue letters after a brief questionnaire and a payment: on their own, they are not sufficient to establish a disability or a need for an assistance animal.3U.S. Department of Housing and Urban Development. Fact Sheet on HUD Assistance Animals Notice HUD has called them “not meaningful and a waste of money” when issued without a genuine therapeutic relationship.
Telehealth documentation is a different matter. A letter from a licensed provider who has genuinely treated you carries the same weight whether the appointment happened online or in person. The test is whether the provider actually knows you, not the format of the visit.
How the Approval Process Should Go
After you submit the request, the landlord should engage in a back-and-forth dialogue to clarify what you are asking for, verify supporting documentation, and work through any concerns. Both sides are expected to participate in good faith. A landlord who ignores the request or sits on it for weeks is not meeting the standard.
HUD’s internal guidelines set a maximum of 30 business days to process and provide a reasonable accommodation from the date of the request, whether the request was made orally, in writing, or in any other form. That clock pauses while the landlord is waiting on medical documentation you were asked to supply, and resumes when it arrives. If something outside either party’s control causes a delay, the landlord must notify you in writing with the reason and an approximate decision date.5U.S. Department of Housing and Urban Development. Chapter 6: The Decision Making Process
Repeated requests for “additional documentation” every few weeks, with no genuine gap in what you have submitted, can be a stalling tactic that functions as a denial. That pattern is itself a fair housing problem.
When a Landlord Can Refuse
The law starts from the presumption that the accommodation should be granted. A landlord can deny the request on narrow grounds:
- Undue burden: the accommodation would impose an unreasonable financial or administrative cost.
- Fundamental alteration: the accommodation would fundamentally change the nature of the provider’s operations.
- Direct threat: the specific animal poses a genuine danger to the health or safety of others.
- Significant property damage: the specific animal would cause substantial physical damage to the property of others.
The direct threat and property damage grounds require objective evidence about the specific animal, such as documented incidents of aggression. Assumptions about the breed, size, or species do not qualify. “Pit bulls are dangerous” or “large dogs damage apartments,” without evidence of the actual animal’s behavior, is not a lawful basis for denial. Before denying on threat or damage grounds, the landlord must also consider whether some other accommodation could reduce or eliminate the risk.
A denial must explain the reason and, where possible, offer to discuss alternatives. A flat refusal without explanation almost certainly violates the FHA.
Your Responsibilities Once It’s Signed
Approval does not give you a blank check. The addendum typically sets ongoing obligations:
- Damage liability: you are financially responsible for damage the animal causes to the unit or common areas, beyond normal wear and tear. The landlord cannot charge a pet deposit up front, but can deduct documented damage costs from the security deposit at move-out or pursue costs that exceed the deposit.1U.S. Department of Housing and Urban Development. Assistance Animals
- Control: the animal must be under your control at all times, including in hallways, lobbies, and outdoor common areas.
- Sanitation: you clean up after the animal and dispose of waste properly.
- Behavior: the animal cannot create a nuisance through excessive noise, aggression, or unsanitary conditions.
Violating these terms can lead to revocation. A landlord who can show that the animal has become a genuine direct threat or nuisance despite reasonable efforts to address the problem has grounds to require its removal, though that does not automatically justify evicting you from the unit.
Once the accommodation has been granted, the landlord should not periodically re-verify it or demand updated documentation unless something meaningfully changes.3U.S. Department of Housing and Urban Development. Fact Sheet on HUD Assistance Animals Notice
Rentals Where the FHA Doesn’t Apply
Two federal exemptions exist. A building with four or fewer units where the owner lives in one of them is exempt from the FHA’s discrimination prohibitions, sometimes called the Mrs. Murphy exemption.6Office of the Law Revision Counsel. 42 US Code 3603 – Effective Dates of Certain Prohibitions Religious organizations and private clubs also have limited exemptions for housing they own or operate.7Office of the Law Revision Counsel. 42 US Code 3607 – Religious Organization or Private Club Exemption
Even where the federal exemption applies, state or local fair housing laws may still require the accommodation. Many states have narrowed or eliminated the Mrs. Murphy exemption under their own laws, so a landlord within the federal exemption is not automatically free of the obligation.
If Your Request Is Denied or Ignored
You can file a housing discrimination complaint with HUD’s Office of Fair Housing and Equal Opportunity if your request is denied, ignored, or subjected to unreasonable delays. Complaints can be filed online, by phone at 1-800-669-9777, or by mail.8U.S. Department of Housing and Urban Development. Report Housing Discrimination The complaint must be filed within one year of the last discriminatory act.9U.S. Department of Housing and Urban Development. Learn About FHEO’s Process to Report and Investigate Housing Discrimination You can also file a federal lawsuit under the FHA, and many states have their own fair housing agencies with separate processes.
Keep a written record of everything. Save your accommodation request, the documentation you submitted, the landlord’s responses or silence, and any communications that show delay or pretext. A well-documented paper trail is often the difference between a complaint that moves and one that doesn’t.