From
https://archive.ph/eLjbX about the proposed Detroit land tax:
land will be taxed at a new rate of 11.8%, whether or not it has anything built on it.
Homeowners are guaranteed that they won't pay more tax. They can make the change fairly cost neutral for honeowners because currently land value is usually low compared to value of the house.
Increasing tax to 12% will drastically devalue existing vacant land. Land owners are currently paying say 7% mortgage (or equivalent opportunity cost by tying up equity).
Adding a 12% land tax would massively devalue land. The city is basically saying use it or lose it. To make it worthwhile to use it, any extra investment needs to return enough income to cover the new land tax (the tax is still there even if developed since the land value remains the same). I imagine owners would sue the city. Having your land value crashed by heavy taxation seems a bit harsh (not that most of us would be weeping for the investors).
The land value tax appears to only affect some of Detroit:
Before: https://detroitmi.gov/sites/detroitmi.localhost/files/2023-0...
After: https://detroitmi.gov/sites/detroitmi.localhost/files/2023-0...
I can't think of a way to model the drop in property market value due to the taxation. Can anyone think of a good approximation for how precipitously the market value would drop?
PS: I live near an area totally blighted by investors over many decades. I agree with the purpose behind land value tax - even though a land tax appears to completely screw over current investors. Investors have been screwing us locals for a long time, so maybe it is just.