I agree! But in appraisals that I have seen, there is an effort to assess the highest and best use of a parcel as well as a break-out of the value of the land associated with a parcel.
If the highest and best use of a parcel is a skyscraper, a sale of the parcel should occur near the valuation of skyscrapers in that area. If there is no skyscraper on the parcel, the sale should occur near the valuation of land that has the possibility to be turned into a skyscraper.
> Switching from a tax on market value to a tax on land value rewards the the owner who developed their land and punishes the owner who didn't.
I agree that the owner who built the skyscraper is being penalized (but also, the owner would not have created a sksyscraper if the underwriting did not show the endeavor would be profitable).
However, both land owners are being taxed on land value; one is also being taxed on the improvements on the land. It would seem that the land value of both parcels should be the same.