>But just because my land is worth £100k doesn't mean I should be forced to sell the house that is on it for only £100k! Then you could "value" the land at £20

>But just because my land is worth £100k doesn't mean I should be forced to sell the house that is on it for only £100k! Then you could "value" the land at £200k and pay a higher property tax to secure that preference. In other words, your property is more valuable, to you. >If you must have that sort of system, there probably ought to be an obligation on the buyer to first pay to have the entire existing structure demolished. I think you are right, which is a problem. Or you could stipulate that all the buildings are demolished before the land bought in this manner is used. I think this system would evolve into people overvaluing their land to be between the land and the land+building value, and then keeping a public offer for the land+building value. That strategy would minimize the land-only sales and encourage buyers to buy the entire building instead.