This week I got my notice from the government about how much they think my house is worth. They clearly didn’t spend much time on my house because my assessment went up by exactly the average amount in my area, 13%. Fortunately, this doesn’t mean that my property taxes will go up by 13%. City governments don’t collect more taxes when property values rise and less when property values fall. What actually happens is the city decides on the total amount they will collect from homeowners, and then divides that amount among homeowners in proportion to assessed property values. For example, if the city needs $1 billion from us, and the total value of all houses is $80 billion, then the tax rate is set at 1/80=1.25%. A house worth $320,000 would pay $4000 in property taxes. If property values had plummeted to a total of $50 billion, then the tax rate would have been set at 1/50=2%. The house that was worth $320,000 in good times is probably worth only $200,000 in bad times, but would st...