In most cases, you won’t need to leave your home. However, it is recommended that children less than a year old are not on the premises (as they might be allergic). And most companies advise waiting two to four hours before letting young children in the house. If your house needs more extensive services like fumigation, expect to be out of the house for three to four days. Be sure to let your technician know if there are any sensitive persons, pets, plants around your house.