Visit Part 1 if you have not yet.
The authorities may not have the resources to examine one house at a time, but there are property value assessment services that can not only assess the value but also provide you with information about comparable real estate in your locality - information that will come in handy when you file your claim.
With your application to reduce property tax, you should provide the tax assessor with the current market value and "evidence" to support your claim. The biggest proof you can provide to support your case is the details, including sale price, of like properties present in your neighborhood.
A good value assessment and comparison service will provide you with the market value of your house and data on other comparable houses sold in your neighborhood. The report containing information on comparable sales may cost you some bucks, but it will immensely strengthen your case and you may end up saving on property tax.
Tax reassessment is something you should definitely consider, because there are clear flaws in the tax assessment system. When making your appeal, make sure that you have solid evidence to persuade the tax assessor to rule in your favor.
Question for the Reader: Have you had your home reassessed for tax purposes?