State pet-deposit treatment, federal Fair Housing Act assistance-animal rules, and what Washington landlords can and cannot ask.
Washington landlords operate under two separate rulebooks for animals. Ordinary pets are a business decision governed mainly by RCW 59.18.285 and your lease. Service animals and emotional support animals are not pets at all under the law; they are disability accommodations protected by the Washington Law Against Discrimination (RCW 49.60) and the federal Fair Housing Act. Charging the wrong fee, or applying a no-pet policy to the wrong animal, is where most owners get into trouble.
For pets you choose to allow, an additional pet damage deposit is capped at one month's periodic rent under RCW 59.18.285, and any nonrefundable fee has to be spelled out in writing. For service animals and ESAs, you generally cannot charge a pet deposit, pet fee, or pet rent at all, and you cannot enforce breed, size, or weight limits against them. Washington also punishes tenants who fake it: under RCW 49.60.214, misrepresenting an animal as a service animal is a civil infraction carrying a fine of up to $500.
This page walks through the split between pets and assistance animals, what you may and may not ask a tenant, and the accommodation process the Washington State Human Rights Commission expects you to follow.
Total security deposit (including pet deposit) capped indirectly via fee disclosure rules. Washington expressly limits non-refundable pet damage deposits to 25% of one month's rent (RCW § 59.18.285) on top of the regular security deposit.
An ordinary pet is anything a tenant keeps for companionship that is not tied to a disability. You are free to prohibit pets, restrict breeds and sizes, and charge for them, subject to your lease and local ordinances. A service animal (under the ADA, a dog individually trained to perform work or tasks for a person with a disability) and an emotional support animal (an animal that alleviates a disability's symptoms by its presence, with no training required) are treated as accommodations, not pets.
The practical consequence: your no-pet policy, breed list, and weight cap do not apply to a service animal or ESA. Under WAC 162-38-100, a landlord may not impose a pet deposit on a disabled tenant's dog guide or service animal in addition to a standard cleaning or damage deposit, and may not refuse to rent because of the animal. The federal Fair Housing Act extends the same logic to ESAs in housing.
For a permitted pet, an additional pet damage deposit may not exceed one month's periodic rent under RCW 59.18.285. Any fee you keep regardless of damage must be nonrefundable in name and in the written rental agreement; you cannot label nonrefundable money a deposit. You may generally charge monthly pet rent for an ordinary pet if the lease provides for it.
For a service animal or ESA, you may charge none of these pet-specific costs: no pet deposit, no pet fee, no pet rent, no breed surcharge. The standard security deposit that applies to every tenant still applies, and the tenant remains fully responsible for any actual damage the animal causes. Note that some cities are stricter than the state floor: Seattle limits a pet damage deposit to 25% of one month's rent and caps combined deposits and nonrefundable move-in fees at one month's rent.
When a tenant asks to keep an assistance animal, treat it as a reasonable-accommodation request under RCW 49.60.222 and the Fair Housing Act. If the disability and the animal's connection to it are not obvious, you may ask for reliable documentation from a professional in a position to know about the disability and the disability-related need for the animal. For a service dog whose task is not obvious, you may ask only two questions: whether the animal is required because of a disability, and what work or task it is trained to perform.
You may not require the animal to wear a vest, demand certification or registration papers, ask about the nature or severity of the disability, or insist on a specific breed or a demonstration of the task. HUD's 2020 assistance-animal guidance frames the analysis: does the requester have a disability, and does the animal work, assist, or ease symptoms related to it. If yes to both, the accommodation is presumptively required unless the specific animal poses a direct threat or would impose an undue burden.
Assistance-animal protections are strong but not unlimited. You may deny or remove an animal that poses a direct threat to the health or safety of others that cannot be reduced by another accommodation, or one that would cause substantial physical damage to property. The assessment has to be individualized and based on the specific animal's actual conduct, not on breed reputation or generalized fear. A tenant also stays liable for damage the animal causes and for nuisance behavior that would justify action against any tenant.
You may verify a genuine documentation request, and Washington backs owners against fraud: under RCW 49.60.214, a tenant who knowingly misrepresents an animal as a service animal commits a civil infraction punishable by a fine of up to $500. That said, denying a legitimate accommodation exposes you to a WLAD or Fair Housing Act complaint, so document your reasoning before refusing.
Keep your pet policy and your accommodation process in separate lanes. Put pet deposits and any nonrefundable pet fees in writing, keep the pet damage deposit at or below one month's rent (lower where a city ordinance requires), and never route an ESA or service-animal request through your pet screening or pet-fee workflow. Train anyone who takes applications to ask only the permitted questions and to escalate accommodation requests rather than deny them on the spot.
When you receive a request, respond promptly, request documentation only when the need is not obvious, and keep records of what you asked and why. If you believe an animal is a genuine direct threat or the documentation is fraudulent, document the specific facts before acting. The Washington State Human Rights Commission and HUD both enforce these rules, and a clean paper trail is your best defense.
The most common mistake in Washington ESA cases is responding with a flat denial, "no pets means no pets", instead of engaging in the interactive process. The interactive process is itself a substantive duty. A landlord who refuses to consider the request, demands more documentation than HUD permits, or imposes a pet fee on an accepted assistance animal will lose at HUD even if the underlying accommodation could have been reasonably denied on its merits.
Pet-related eviction filings correlate with overall landlord-tenant litigation rates. View landlord risk and tenant-law profile by city:
No. Under the Washington Law Against Discrimination and the federal Fair Housing Act, an ESA is a disability accommodation, not a pet. You cannot charge a pet deposit, pet fee, or pet rent for it, though the tenant remains responsible for any actual damage the animal causes and for the standard security deposit that applies to all tenants.
Under RCW 59.18.285, an additional pet damage deposit cannot exceed one month's periodic rent. Any nonrefundable pet fee must be identified as nonrefundable in a written rental agreement. Some cities are stricter: Seattle caps a pet damage deposit at 25% of one month's rent.
If the disability or the animal's connection to it is not obvious, you may ask for documentation from a professional in a position to know about the disability and the need for the animal. For a service dog whose task is not apparent, you may ask only two questions: whether it is required because of a disability and what task it is trained to perform. You may not ask about the disability's nature or demand certification, a vest, or registration.
No. Restrictions you enforce against ordinary pets do not apply to service animals or ESAs. WAC 162-38-100 and federal law require you to make a reasonable accommodation regardless of breed, size, or weight, unless the specific animal poses an individualized direct threat that cannot otherwise be reduced.
Yes, in narrow cases. You may deny or remove an animal that poses a direct threat to others' health or safety that cannot be reduced by another accommodation, or one that would cause substantial property damage. The decision must be based on that specific animal's actual behavior, not breed stereotypes, and should be documented before you act.
Under RCW 49.60.214, enacted in 2018, knowingly misrepresenting an animal as a service animal is a civil infraction in Washington punishable by a fine of up to $500. Even so, you should verify through the lawful documentation process rather than accuse a tenant, because wrongly denying a legitimate accommodation can trigger a discrimination complaint.
Federal authority: 42 U.S.C. § 3604(f)(3)(B); 24 C.F.R. § 100.204; HUD FHEO Notice 2020-01. State authority: RCW § 59.18.260 / RCW § 59.18.285. Last updated July 14, 2026. For informational purposes only, not legal advice. Pet and assistance-animal questions are highly fact-specific; consult a licensed Washington attorney before refusing any request.
