> Increased demand for housing in my area doesn't mean I have more cash to pay taxes. Not until I sell the house and realize that gain. Right. As I understand

> Increased demand for housing in my area doesn't mean I have more cash to pay taxes. Not until I sell the house and realize that gain. Right. As I understand it, that's part of the point (for economists, anyway): It incentivizes the allocation of scarce resources to those who value it more highly (and thus, presumably, to those who can make more productive use of it). Now, I don't want to give the impression that I am on board with this argument, since it implicitly incentivizes the concentration of property ownership into the hands of those who will rent it out, rather than those who will use it. Landlords who are faced with a growing tax bill don't have to sell the property to realize their gains, they can just raise rents (not to mention using it as collateral for a loan to purchase more property). In order to make the incentives align correctly for more participants, you would also have to establish a pretty robust system of rent control to keep spiraling property values from pricing existing homeowners out of the market, and incentivizing redevelopment: if you can't raise rents arbitrarily to cover your property taxes, you have to build more units to rent (but not so many that a glut of available units depresses rental income).