If you bought your home before the bubble burst you're probably over paying on your property taxes. I don't know how other states work but in CA they can only raise your taxes by 2% each year. But they do that automatically without regard to how market is actually performing.
The good news is that you can request that your property be reassesed! You may have seen/heard commercials for companies that will help you do this for a fee. Those people are scam artists because all you have to do (at least in SD) is fill out a form and mail it in to the county. There's
no fee for this to be done!
For my GC pals in SD County this is the form that you need.
http://arcc.co.san-diego.ca.us/arcc/docs/calrev.pdf The form is due by Friday, May 30th. So get to it already!
If you bought property during the boom I
strongly urge you to contact your local assesor's department to find out how can save money on your property taxes!