Step 3: Determine the issues to emphasize. A property tax appeal can be based on a mistake in the assessment or a higher assessment than comparable homes. Note items that negatively affect the value of your home. For example, a bridge is no longer in operation near your home, making your house much less accessible—and less valuable. Or if a garage has been taken down to increase garden space, the home’s value likely would be less. Compare your assessment with homes of the same size, age, and general location.

Obtain comparisons for 5 to 10 homes.