"If you undervalue the property, someone can buy it through an app."
This assumes that you set a self-assessed property value and are subsequently required to sell if an offer is made. (I guess, that's the premise of "every property is always up for sale")
As it stands right now, a house valued at $500,000 will pay a tax that reflects that valuation, but the owner doesn't have to sell even if I offer them x10 that amount. The proposal of self-assessment only works if there's a downside to a low-self assessment (forced selling at self-assessed valuation). This seems decidedly opposed to the concept of "private property" (e.g. This [X] thing is mine).
This assumes that you set a self-assessed property value and are subsequently required to sell if an offer is made. (I guess, that's the premise of "every property is always up for sale")
As it stands right now, a house valued at $500,000 will pay a tax that reflects that valuation, but the owner doesn't have to sell even if I offer them x10 that amount. The proposal of self-assessment only works if there's a downside to a low-self assessment (forced selling at self-assessed valuation). This seems decidedly opposed to the concept of "private property" (e.g. This [X] thing is mine).