Keep in mind that you must have actual comps to show what the value really is or the $400 expense or so for an appraisal. Most importantly, keep in mind that regardless of what the decision is this year even showing that they were double the real value they will be back to showing that the value is double next year. There is no affect on next year's assessment from this year's appeal. It can be very trying and usually saves very little money, yet wastes a ton of time. For that reason, the counties usually show the value lower than it really is just to avoid all of the appeals, but of course the tax rate is just shown higher so that the overall income is the same. Kind of goofy, but how else can it be done?