In Ireland as well as property tax we also have a dereliction charge for sites/properties, it's been on the books since 1990, but recently being leveraged (clumsily) to punish land hoarding in urban areas. It's currently 7% p.a. of what somebody declares the market value of the land is, and the land can also be subject to a CPO unless remedied.
The LPT local property tax is a fraction of 1% p.a. typically 0.1% (subject to regional and valuation variables).
Here in California, we tend to have total property tax rates of ~1.5%, which includes improvements like buildings. For various reasons, this is lower than the rest of the country which is more like 2-2.5%. But also, the assessed values of buildings tends to be artificially low in most places. These low assessed values discourage real estate changing hands, because the new owner would often have to pay more.
There's a lot of economists who think we should have a higher tax rate, but only on the true market value of the land, to promote efficient usage of real property.
