Guide

How Long Does an ESA Letter Last? Renewal Rules Explained

Why most landlords want an ESA letter from the past year, when to renew, and how to keep your documentation current without stress.

Updated October 20, 2026 • 3 min read
Desk calendar beside a potted plant on a wooden table
In this guide
  1. Do ESA letters expire?
  2. The 12-month rule of thumb
  3. When should you renew your ESA letter?
  4. What changes when you renew?
  5. How renewal works with Dogtor’s Note
  6. What if your landlord asks for an updated letter mid-lease?
  7. The bottom line
Key takeaways

  • Federal law doesn’t set a fixed expiration date for ESA letters.
  • In practice, many landlords, property managers and schools ask for a letter dated within the last 12 months.
  • Renewing once a year — and before a lease renewal or move — avoids most problems.
  • Some states have their own rules about ESA documentation, so check local requirements.

You got your emotional support animal letter, your landlord approved it, and life moved on. Then lease renewal comes around and your property manager asks for an “updated letter.” Is that allowed? How long is an ESA letter actually good for?

Do ESA letters expire?

There’s no single federal rule that says an ESA letter expires after a set time. The Fair Housing Act requires housing providers to consider reasonable accommodation requests, and when the need isn’t obvious they can ask for reliable documentation. What counts as “reliable” is where dates come in.

Because a person’s health and needs can change, many housing providers consider a letter from the past year to be current. A letter that’s several years old is more likely to be questioned.

The 12-month rule of thumb

Most people treat an ESA letter as valid for about one year. You’ll commonly be asked for a recent letter when:

  • You’re renewing your lease
  • You’re moving to a new apartment or home
  • A new property manager or owner takes over
  • You’re starting a new school year in campus housing
  • Your landlord has a policy of annual documentation updates
Good to know: In September 2025, HUD withdrew its older guidance notices on assistance animals. The Fair Housing Act itself didn’t change, but with less federal guidance, housing providers vary more in what they ask for. A current, verifiable letter is the simplest way to avoid back-and-forth.

When should you renew your ESA letter?

  1. About a month before your lease renewsThat leaves time to send updated documentation without pressure.
  2. Before you apply for a new placeA fresh letter makes the application smoother.
  3. When your situation changesFor example, if you get a new animal or add a second one.
  4. Once a year as a habitA yearly check-in with a licensed clinician keeps your documentation current.
Brown dog resting on a sofa at home

What changes when you renew?

A renewal usually involves a short reassessment with a licensed health care professional, who confirms you still have a disability-related need for your animal. If you qualify, you get a letter with a new date. Your animal’s details should be updated if anything changed.

How renewal works with Dogtor’s Note

With a Dogtor’s Note membership, your letter is re-issued automatically each year while your membership is active, so you always have a current letter on hand. Your verification code stays the same, and your landlord can confirm on our verification page that your letter is active — no new paperwork for them to track down.

What if your landlord asks for an updated letter mid-lease?

Some landlords ask for updated documentation more often than once a year. If your letter is recent and you have a reasonable accommodation already approved, ask in writing why an update is needed. If your letter is more than a year old, it’s usually easiest to renew it. If you think you’re being singled out or harassed, consider contacting a local fair housing organization.

The bottom line

ESA letters don’t have a federal expiration date, but most housing providers expect a letter from the past 12 months. Renew yearly, renew before you move, and keep your letter easy to verify — that covers nearly every situation. For the basics, see how to get a legitimate ESA letter online.

Frequently asked questions

Is an ESA letter valid forever?

No federal rule sets an expiration date, but most landlords and schools expect a letter dated within the last 12 months. Older letters are more likely to be questioned.

Can my landlord ask for a new ESA letter every year?

Many landlords ask for updated documentation at lease renewal, and a yearly update is common. If a landlord asks much more often than that, ask in writing why an update is needed.

Do I need a new letter if I move?

It’s a good idea. A new landlord will review your request fresh, and a current letter makes approval much smoother.

Does my verification code change when my letter renews?

With Dogtor’s Note, no. Your letter is re-issued each year while your membership is active, and the same verification code continues to show it as active.

What happens if my ESA letter is out of date?

Your landlord may ask for updated documentation before approving or continuing your accommodation. Renewing your letter usually resolves this quickly.

This guide is general information, not legal or medical advice. Laws and policies change and can vary by state, city and building. For advice about your situation, talk with a licensed professional.

Ready to keep your animal by your side?

Answer a few questions online. A licensed doctor reviews your answers, and if you qualify, your letter comes by email with a verification code your landlord can check in seconds.

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Dogtor’s Note provides ESA and service animal letters based on a professional review and clinical opinion from a licensed healthcare provider. We do not offer medical treatment, diagnosis, or ongoing care. Acceptance of ESA or service animal documentation is determined by third parties, including landlords, property managers, businesses, and applicable laws. We do not guarantee approval or acceptance in every situation. Emotional support animals and service animals are not registered or certified by any government agency. Powered by FLMMD Tech Solutions LLC. All Rights Reserved. View our Privacy Policy and Terms and Conditions.