Most likely you have recently received the WOZ value? It can in these harsh economic times beneficial to have very critical look to the set value. The set value is influenced by market developments and we often doubt about the correct impact of this in your WOZ valuation. If in doubt about the correctness of the set value lodge an objection against this value.
It is also good to know incidental value reducing factors were honored by the Judges, the more reason for a critical look at the set WOZ value. Let yourself be assisted by an expert (broker / appraiser) in the WOZ to get the proper appreciation.
Also the height of the WOZ is of influence in your income tax return, if you own a house and other municipal taxes.