Generally speaking CA property tax is 1% of purchase price, then 2% yearly increase on that base tax, however refi, pulling construction permits, or title change, allows the local assessor to revalue your home and increase your property taxes. The formula used for reassessment when you haven't refi'd for more than your current loan, is using 50% of the homes current market value for the new base property tax amount.
When most LEO's only target practice to qualify, and when needing to requalify, it is easy to understand how LEO's can miss 60% or more of the time.
Nothing has been done to the house, refi was not reassessed.
Going into battle with a 60% chance of hitting the enemy = you dying.