The cost of repairing termite damage depends on the extent and location of the damage, as well as the type of repair needed. According to HomeAdvisor, the average cost of repairing termite damage is $3,300, but it can range from $200 to $8,000 or more. The cost of exterminating termites can vary from $500 to $2,500 or more depending on the method and size of the infestation.