Township Ordinance entitled Building Numbering System chapter 15.04 requires the numbering of homes. The house number must be placed at the end of the driveway and another number must be placed on the house.
Try to think of yourself as an emergency vehicle coming to your home. Can you find your house easily? Is the house identifiable by its number?
Remember, when an emergency call comes into the radio communications center, it is dispatched to emergency workers and police by your physical address.