Most likely you are overassessed, and in most cases by at least 15% or more. Unfortunately the assessments in a particular neighborhood and land-use code can fluctuate drastically. Chances are that you are paying more than your fair share, and are assessed higher than you should be. This means that there are always several properties that meet appeal criteria, and these properties can be used to build a case on your behalf. If you are severely overassessed, you could be paying up to 30-40% or maybe even more than you should be.