Depends if your in the city limits or out but the actual number for in town is 8.98 of the EVA. In Mill Creek (a large community out of the city limits) its about 9.55. The local realtors used to use about a 2.3% number (of asking/listing or selling price for quick math) that worked in the past but not so much any more as the values have dropped but not the taxes, they are up. But a 500K home is about 12-14K in taxes.
Let me know if i can help