Assistance animal

Where the term is used

Under the Fair Housing Act, housing providers must make reasonable accommodations in rules and policies, such as no-pets rules, when needed for a person with a disability to use and enjoy a home. HUD's 2020 notice described two types of assistance animals: service animals and other support animals. That notice was withdrawn in September 2025, but the underlying law didn't change. HUD's May 2026 enforcement guidance treats requests for animals individually trained to perform disability-related tasks as presumptively reasonable and reviews untrained emotional support animals case by case.

The HUD and DOJ joint statement on reasonable accommodations, still published by DOJ, uses an assistance dog in its example of a required exception to a no-pets policy.

Assistance animal vs service animal

The ADA's service animal definition is narrower: a dog (or, under a separate provision, a miniature horse) individually trained to perform tasks for a person with a disability. Comfort alone doesn't qualify.

So every psychiatric service dog is an assistance animal in housing, but not every assistance animal is a service animal.

• Housing (FHA): assistance animals include service dogs and emotional support animals
• Public places (ADA): only trained service dogs (and miniature horses, separately)
• Air travel (DOT): trained service dogs; ESAs aren't required to be accepted

Assistance animal documentation

If your disability or need for the animal isn't obvious, a housing provider may ask for reliable information that verifies the disability and the link to the accommodation. They generally may not ask about the nature or severity of your disability. For a trained service animal such as a psychiatric service dog, the HUD and DOJ joint statement says providers may not require extra fees or deposits as a condition of the accommodation. Under HUD's May 2026 guidance, fees for untrained emotional support animals may be allowed, though state law may differ. Either way, you're responsible for damage.

State laws can add detail. Florida, for example, limits what a provider may request for an emotional support animal and says online registrations aren't enough by themselves.

Which letter fits

If your dog is task-trained, a PSD letter is the accurate document for housing. If your dog provides comfort but isn't task-trained, an emotional support animal letter is the accurate document; we don't provide ESA letters. Either way, a letter isn't needed for public access and doesn't grant it.

Checklist before you ask

Clear, honest requests are easier for providers to evaluate.

• Confirm whether your dog is task-trained or provides comfort only
• Make your request in writing
• Provide reliable documentation if your disability or need isn't obvious
• Keep your dog's vaccinations and local license current
• Keep copies of all correspondence