As pres of our owners association, a few years back, I got a call from an irate owner.
He purchased a property for $50K that was evaluated for taxes at $25K.
He wanted me to interfere and get his taxes lowered.
My response was rather negative as I told him that the evaluations were based on selling history in the area and that thanks to him the city would start considering that all similar properties would then be worth 50% more than they had evaluated.
That is exactly what then occured the next year, not exactly his 50% ratio, but a considerable raise however.
Funny but one sale like the above example causes increases, but if 10 sell below evaluation, taxes don't come down.
But then for those that can remember that far back, taxes were only a wartime tempory measure to pay off WW2 costs.
That's not a 50% raise, that's 100%. 50% would have been 37.5 K