@h5e There are some changes by municipality here, too, but in general state law still sets the broad rules. Some of the common ones states use are: (1) exempting ~50% of the median price of a "normal" home (2) Putting a very low maximum on how much your primary residence's taxes can increase by (3) Fixing the assessed value to that at the date of sale
That latter one is a California thing that actually causes serious issues, though.