The short version: most landlords expect an ESA letter to be no more than 12 months old at the time you submit it. That convention is widespread, codified in some states, and reasonable in most circumstances. The longer version has nuance -- federal law does not actually impose a 12-month limit, some state laws do, the practical pressure to renew comes from landlord behavior, and renewal usually means a fresh evaluation rather than a rubber-stamped reissue.
This post walks through what the law actually says, what landlords expect in practice, when renewal makes sense, and what to expect at the one-year mark.
The federal floor: there is no fixed expiration
The Fair Housing Act (42 USC 3601 et seq.) and HUD FHEO-2020-01 do not impose a specific expiration date on ESA documentation. The federal standard is that the documentation must come from a licensed health-care provider with personal knowledge of the patient and must support the existence of a disability and a connection between the disability and the animal.
In theory, a letter from five years ago issued by a clinician with whom you no longer have a relationship could still describe an accurate clinical picture. In practice, both housing providers and the patient's clinical situation tend to change over a year, and a letter from a relationship that no longer exists raises reasonable verification concerns.
HUD guidance does say that the supporting clinician must have "personal knowledge" of the patient. A letter that is several years old, from a clinician you no longer see, in a clinical situation that may have changed materially, no longer reliably describes "personal knowledge" in any meaningful sense. That is the federal logic behind why landlords typically expect annual renewal even though the statute does not explicitly require it.
What state laws say
Several states have codified the 12-month rule explicitly. A few examples:
- Florida (Statute 760.27) -- a landlord may "require that the documentation not be older than one year." This is the clearest 12-month rule in state law.
- California (AB 468) -- requires a 30-day clinical relationship before a letter can be issued, which effectively builds in regular reassessment cycles. Letters in California are generally treated as 12 months valid by landlords, though the statute does not name a specific expiration.
- New York, Massachusetts, Washington, Illinois -- no specific statutory expiration for ESA documentation, but landlord practice in these states generally follows the 12-month convention.
If your state has a specific rule, the state page covers it. If your state does not, the practical rule is "expect the landlord to ask for documentation no older than 12 months."
Why landlords ask for current documentation
A few reasons land in the "reasonable" column:
- Clinical situations change. Someone whose anxiety required an ESA letter two years ago may be in a substantially different situation now. A current letter reflects current circumstances.
- Clinician relationships change. The clinician who issued the original letter may no longer practice, may no longer be licensed in your state, or may no longer have a relationship with you. A current letter ensures the supporting clinician remains a real, licensable, contactable person.
- Verification. Landlords sometimes verify the issuing clinician's licensure. A recent letter is easier to verify (the clinician is still actively practicing, the license is current, the contact information still works).
- Lease cycles. Most residential leases are 12 months. A landlord asking for fresh documentation at lease renewal is consistent with how the rest of the lease works.
A few reasons land in the "not great" column:
- Some landlords use the renewal cycle to discourage tenants. A landlord who hopes the tenant will let the documentation lapse is not acting in good faith.
- Some online ESA services have made renewal cycles mostly performative -- a 60-second checkbox quiz once a year is not a clinical reassessment. Landlords have become more skeptical as a result.
What "renewal" actually means
There is a misconception that ESA letter renewal is a paperwork exercise -- that the original clinician simply updates the date and reissues. That is not what renewal should be, and it is not what a real licensed clinician will do.
Renewal means a fresh evaluation. The clinician revisits:
- Whether the patient still has a disability under the FHA standard.
- Whether the animal continues to play a meaningful role in the patient's management of the condition.
- Whether the housing context still makes the documentation relevant.
- Whether anything has materially changed (new diagnosis, new clinical picture, new housing, new animal).
If everything still aligns, a new letter is issued. If something has changed -- the condition has resolved, the animal has been replaced by a different one, the patient has moved into pet-friendly housing without restrictions -- the clinician has a real conversation with the patient about whether continued documentation is appropriate.
Some patients no longer need an ESA letter at year-one. That is a real outcome and a healthy one. The clinician's job is to assess honestly, not to keep the renewal cycle running on autopilot.
When to renew, in practical terms
Plan for renewal roughly 30 to 60 days before your current letter's one-year anniversary. The math is straightforward: if your current letter is dated June 1, 2026, your landlord can reasonably ask for fresh documentation any time after June 1, 2027. Starting the renewal evaluation in early May 2027 gives you time for the appointment, the clinical conversation, and the issuance of the new letter before the old one passes the 12-month mark.
A few specific timing situations to think about:
- Lease renewal due in the next 90 days. If your lease renews on July 1, 2027 and your letter is dated June 1, 2026, plan to renew the letter in May 2027 -- before the lease renewal paperwork lands.
- Move planned in the next 90 days. If you are moving, the new landlord will typically ask for current documentation when the new lease is signed. Time the renewal to ensure the letter is recent at signing.
- Clinical situation has changed. If your clinical picture has changed materially in the year -- new diagnosis, change in treatment, significant improvement, significant decline -- it is worth revisiting the letter even if the calendar does not require it.
- Animal has changed. ESA letters are generally written to support documentation for a specific animal, with descriptive details that link the documentation to the household. If your animal has changed (rehoming, death, replacement), the letter needs to be updated regardless of the calendar.
What about lifetime ESA letters?
Some online services market "lifetime" or "permanent" ESA letters. Treat those with skepticism.
The federal rule does not specify an expiration, which is the basis for the marketing. The practical rule is that landlords almost universally expect documentation no older than 12 months -- and several states explicitly permit landlords to require it. A "lifetime letter" purchased today and submitted to a landlord in 2030 is unlikely to be accepted as currently authoritative.
A "lifetime letter" is also a clinical impossibility. The clinician issuing it cannot speak to the patient's clinical situation in 2030, 2032, or 2040. The patient's condition may have resolved, the animal may have changed, the clinician may no longer be licensed. A clinician who claims to make a permanent statement about future clinical circumstances is making a statement they cannot justify.
We cover this and other warning signs in Online ESA Letters: How to Tell Real From Fake.
What if my landlord asks for a letter older than 12 months and I do not want to renew?
Three options.
1. Discuss with the landlord
Some landlords will accept a slightly older letter if you can explain why renewal is delayed. If your scheduled evaluation is two weeks away, the landlord may be willing to wait. Communicate in writing.
2. Renew if appropriate
If your clinical picture is unchanged and the animal still plays the same role, renewing is straightforward. The fresh evaluation is the model -- in a state like California or Florida with codified relationship requirements, it is the law. In other states, it is best practice and the cleanest path through landlord scrutiny.
3. Reconsider whether the documentation is still needed
If your clinical picture has changed substantially -- if the condition has improved, if the animal is no longer central, if your housing has changed -- it may be that an ESA letter is no longer appropriate for your situation. Talking to a clinician about that is a reasonable use of the renewal evaluation. There is no shame in concluding that you no longer need the documentation.
What changes between year-one and year-two letters
For most patients whose situation is stable, a year-two letter looks materially identical to a year-one letter. The clinician confirms that the disability picture remains substantially the same, that the animal continues to play a meaningful role, and that the housing context still makes the documentation relevant. The new letter has a fresh issuance date, the same general clinical narrative, and updated details if any have changed.
For some patients, the year-two evaluation is when something material has shifted:
- A new clinical concern has surfaced. The original letter was anchored in anxiety; the patient has since been diagnosed with PTSD, OCD, or another condition that adds to the picture.
- The patient has moved into a different living situation. A new lease, a new building, a new state. The clinician may want to update the documentation accordingly.
- The animal has changed. Rehoming, death, replacement. The new animal needs to be documented.
- The patient's condition has substantially improved. Treatment has worked, daily functioning has stabilized, the animal still plays a role but the disability picture is different. The clinician may issue a different letter, or may have the conversation about whether the documentation is still appropriate.
A renewal does not always mean a new letter
This is worth saying explicitly. The renewal evaluation is a clinical conversation. If the clinician concludes after the conversation that the patient no longer meets the FHA disability standard, no letter is issued. The fee covers the clinical assessment, not a reissuance.
For most patients with chronic conditions, the year-two letter is the same as the year-one letter, and the conversation is short. For some, it is more involved. For a small number, the appropriate outcome is "no longer needs ESA documentation." All three are legitimate.
What to ask your clinician at renewal
When you book the renewal evaluation, a few useful prompts:
- "Has anything in my clinical picture changed in the last year that would affect this?"
- "Is there anything I should be doing differently in the year ahead?"
- "If my landlord pushes back on the new letter, what is the cleanest way to respond?"
- "Should we update anything about how the animal is described?"
These are reasonable questions. They are also not "what do I need to say to get approved" questions -- which the clinician will not answer. The renewal evaluation is a conversation about reality, not a preparation session for a test.
Bottom line
- Federal law does not impose a fixed expiration on ESA letters.
- Landlords typically expect documentation no older than 12 months. Several states (Florida explicitly) permit this requirement.
- Renewal means a fresh clinical evaluation, not a rubber-stamped reissuance.
- Plan to renew 30 to 60 days before your current letter's one-year anniversary.
- If your clinical picture has changed substantially, the renewal evaluation is the right time to revisit whether documentation is still appropriate.
- "Lifetime ESA letters" are marketing, not clinical reality. Treat them with skepticism.
Talk to a Veritas clinician
A licensed nurse practitioner in your state will evaluate whether ESA documentation -- whether a first-time letter or a renewal -- is clinically appropriate in your situation. The fee is $99 and covers the evaluation itself, not a guaranteed outcome.
Educational content only. This post is not a clinical evaluation, not medical advice, and not a substitute for the professional judgment of a licensed clinician. Whether ESA documentation is issued in any individual case is determined solely by the licensed clinician's professional judgment at the time of your evaluation. Reading this article does not create a clinician-patient relationship.
Veritas Behavioral Group, LLC. Licensed clinicians available in AZ, CA, CO, DE, FL, ID, IL, KS, MA, NV, NM, NY, TX, UT, VT, WA, and WY.
This is not legal advice. Statutes and regulations change, courts interpret them, and your situation has facts this post does not know. For advice about your specific case, consult a licensed attorney in your state. Veritas's founder is a licensed attorney; this blog is not the practice of law and does not create an attorney-client relationship.