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is to renew your ESA annually to avoid the inconvenience of being denied housing or boarding an aircraft due to outdated documentation.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 Can You Buy a Trained Emotional Support Dog? Can Dogs Take Allegra? Find Out Here! CBD Oil for Dogs: Everything You Need to Know Flea Tick Frontline Spot on Dogs and Treatment Guide [therapypet_step1_form show_in_mobile="1"]