Parents purchased the house (3000 sq ft) in 1970s for 100k and it's now assessed at 1.3m (the monthly rent is only 4000/mo). Property taxes last year were $2833. No reassessment when the house was passed to me. Apparently no reassessment when I pass the house on to my kids and so on down the line. Because of this, most of the houses on my street are occupied by the kids of the people who purchased them. In the case of the house next to me, the two kids split the property into a secret multi-family! (So that they could both share it, as neither could afford to buy the other out... or live anywhere else.) I think their taxes are even lower than mine.
I would have sold but every year the value rises so much faster than the tax cap can ever hope to keep up with (as ronin mentioned). To me the CAP rate is 1%+ more than it would be to someone who purchased from me and had the tax rate reassessed. Odd situation. I have visions of a 3500 property tax bill for a 3.5 million dollar valuation (0.1%). I sense Mr. excuse me Dr. Bernanke will make it so. Oh yes it's the pride of my investment fleet nicknamed the "HMS Dumb Luck".
MB does this not count as ridiculously low in your book? You should be in the same situation.