Usually this means your property grew in value faster than the rest of the city so you now pay for a higher total percentage of the cities budget. This has happ

Usually this means your property grew in value faster than the rest of the city so you now pay for a higher total percentage of the cities budget. This has happened to me too. Roughly speaking if the mill rate falls from 1.0% to 0.9% but your property went from $1 million to $1.2 million you now pay $10,800 instead of $10,000. But the rise in property prices still caused the mill rate to go down.