> Zillow list price for vacant land doesn't consider all the vacant lots held by people who aren't building for various reasons nor does it consider the surrounding suburbs etc. or the land uvm holds but doesn't develop (who they gonna sell to? they have more money than anybody). there are a lot more variables than just zillow!
What? Yes it does. That's how prices work. If UVM sold all of their land, prices would go down, but they aren't selling all of their land, so the prices are higher.
I never said "all land is being used productively." I said "land prices are the primary source of cost in high COL areas." One contributor to high land prices are all the things you mention: people withholding their unused land from the market.
No, there are not more variables than just the sale price. The price of land is the price of land, and it factors in all the variables you mentioned.