I'll say BS.
My assessment has gone up after arguing about it about $35,000 since we bought the house in 9 years. The first assessment a couple of years after we purchased the house went up $59,000 but we argued it down. I think we have been assessed about 3 times so far. The last assessment is higher than the actual appraised value of the house. We paid two different appraisers (Sp.) to have some material to argue with when we went to our hearing.
I would like a new driveway but it's not going to happen. That will add more the "value" of the house and I'm not happy paying $5000 a year as it is now in taxes. It's silly to keep your house up because you'll end up paying for it the rest of your life. What's the point.