This seems by _far_ the biggest difficulty, and I find it strange that this rarely comes up in LVT discussions. Even for nominally 'liquid' land it's not clear who values it or how.
Lots of countries value land and improvements separately (e.g. New Zealand, Australia, Denmark) for council rates (property tax essentially). Here in New Zealand, there are several companies that provide valuation services to local councils (and private individuals if you want to value your property). You can dispute the valuation if you think you're being unfairly valued (usually because you want to pay less property tax).
It doesn't seem that different from what normally is done for property tax. Property tax is already generally based on land and structure (Just look at property taxes on the million dollar tiny houses on prime real estate). LVT is just removing the structure portion.
Is it? I can tell you now, I have no difficulty asserting that the value is near zero for the depreciating, crumbling houses on top of most of the land in the Mission in San Francisco. All the appreciation, which means nearly all of the sales price, of a typical home here, is the land.
BuT rEnNoVaTiOnS. Listen, I’m not trying to give you a comprehensive answer. I’m just trying to show that it’s not by far the biggest difficulty, not in the places LVT is most impactful, such as cities with extremely high vacancies like San Francisco.
The problem you're glossing over is what value should be assigned to the land.
If some land developer wants to build a new arena next to your plot of land - boom you're value just skyrocketed.
If the same land developer backs out of the deal - boom your land is worth less (or is actually worthless).
Your taxes depend on exactly when the assessment was made... and even professionals cannot agree on valuation (as we're seeing in some high profile cases right now).
Even for the same plot of land two people can value it radically differently.
Yes, and it's been long bemoaned about how people game that system and how unfair it has a tendency of being. Which was one of the points I was raising.
There is no objective valuation for anything really... particularly when it comes to more-or-less unique, speculative properties such as land and/or improvements.
The only reason everyone mostly agrees on, say a car's value is there's a lot of cars exactly like it that have been sold recently in whatever area you are in. Yet, every plot of land is mostly unique and has a tremendous amount of potential, debatable factors when it comes to value.