Something that some people may be missing here -
just because your home doubles in 'value', that doesn't mean your property taxes necessarily double. In our county (and many others I think), the total tax bill is divided up across the property values. What this means is, if the total tax bill goes up 5%, and everyone's home doubled, each tax bill would go up by 5% (not 2x + 5%). There's an equalization formula that covers this.
I know first hand that many people that live here do not understand this. They think their taxes are directly related to their assessed value. No, it really is your assessed value in relationship to total assessed values.
I suspect many posters here talking about how someone who experiences a real estate boom can't keep up with their taxes is thinking this way. But it may not be the case. Was it this way in CA prior to Prop 13 (or whatever #)? I don't know.
I can't say how many municipalities use the equalization formula versus an absolute % of value formula, but I will guess (based on my experience of how few people here understand it), that it is way more common than most people think. I'll also guess that most municipalities would prefer an equalization formula, or their year-to-year budgets would vary wildly with real estate markets. If the real estate market tanks, you still need to pay fire, police etc.
There are many retirees in our neighborhood who bought houses for under $100K but if their property tax bill went to current rates the tax bill alone alone would consume close to 100% of an average retiree monthly SS benefits. We can't ship everyone over 65 here to Arkansas or some other lower cost of living place. Many have lived here their whole lives and their children and grandchildren live locally.
First, if everyone was paying the full share, the current rates for new owners would be less. So maybe less sticker shock than you think?
Second, if someone can no longer afford to live in an area, is it really the rest of the communities responsibility to chip in and help? I don't think so, I think the retiree needs to plan and adapt. That includes me. I'm not going to 'ship' anyone anywhere, but if they can't afford the area, they ought to move to a lower COL place voluntarily. Or their children can chip in if they want them near.
BTW, this conversation got me looking into the local tax exemption for seniors, since I'm getting close. It's pretty modest, a $5,000 reduction in assessed value (which is oddly ~ 1/3 of market value for tax purposes - I guess commercial is at full rate?). So a $300K home, assessed at $100K, would get a $5,000 reduction in assessed value, so a 5% discount on their tax bill, no caps otherwise. I know there is a means for seniors to defer taxes and have it charged to their equity plus interest. IIRC, not very attractive rates, but something for an elderly person who wants to live their last remaining years at home.
-ERD50