Does ESA Letter Have to Be Renewed March 11th, 2021 Yes. ESA letters are valid for one year. The recommended practice is to renew your ESA annually to avoid the inconvenience of being denied housing or boarding an aircraft due to outdated documentation. Related Posts How to Verify an ESA Letter: A Guide for Landlords 10 Best Harnesses for Small Dogs You Should Buy 5 Breeds of Dogs with the Longest Lifespan Can Any Doctor Prescribe an ESA? [therapypet_step1_form show_in_mobile="1"]