Depreciation depends largely on age, condition, and the current desirability of the property's features and location. Sales comparison models are usually more important in appeals. A sales comparison model says the estimated market value of your property equals the sale price of a comparable property, with adjustments to the sale price for differences between your property and the comparable. For example, if your property has a swimming pool and two bathrooms, but the comparable has no pool and three bathrooms, you would add the value of the pool to the comparable's sale price and subtract the value of a bathroom. The result would be evidence of what you might expect to sell your property for.
Assessors use more than one comparable, usually three to five.
Also, they use more complex models that incorporate many more factors. Appealing Your Assessment Taxpayers are justifiably concerned about rising property taxes. Even if you can't change anything, you will understand more about what really needs to be changed. Separate the issue of higher taxes from the issue of the accuracy of the assessed value of your property. Elected officials, school boards, and other special taxing authorities establish your tax bill.