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is to renew your ESA annually to avoid the inconvenience of being denied housing or boarding an aircraft due to outdated documentation.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 Your Dog Be Mad at You? Mast Cell Tumor: Dogs Diet and Nutrition Guide Owing a Therapy Pet Flea Tick Frontline Spot on Dogs and Treatment Guide [therapypet_step1_form show_in_mobile="1"]