Renew your ESA letter every 12 months, starting a few weeks before the issue date printed on it reaches one year. Federal law does not set an end date for ESA documentation, but most housing providers treat a letter older than 12 months as outdated and can ask for updated paperwork before approving your accommodation. For the legal side of how long a letter stays valid, see our guide on whether ESA letters expire.
The timing matters most at three points: a new rental application, a lease renewal, and a housing audit where your landlord re-verifies paperwork they previously accepted. Starting your renewal 2 to 4 weeks before any of these gives the clinician time to complete your reassessment and issue a newly dated letter before you need it.
A renewal is a fresh evaluation with an ESA letter from a licensed clinician, not a reprint of your old letter. The clinician confirms your ongoing need and issues a new letter with the current date and their license details. Some states add their own documentation rules, so check our ESA laws by state guide if you’ve moved since your last letter.