If you're confused about the reassessment, then call the tax office. We haven't been reassessed in 10 years. It's mandated by law. Property values change over that time. These past years saw values rise. I'm sure you know your house is worth a lot of money. That's your first clue. Generally, after the houses are revalued then the millage rate is adjusted so that the taxes remain the same unless the town decides to raise them.