The tax is small if you own a condo in foreign quota, but still have to pay yearly. If it is in a company name condo or house they will charge you 12.5% tax on their appraised value. Been going through this for months now and they sent me a bill for the past 7 years. I guess they can’t go back further. I believe there are 2 types of taxes. The other one was very cheap. This was for a house in Company name and didn’t matter if we are living there or not. As a foreign director you must pay the 12.5% tax. If it’s in a Thai name I believe it’s only like 1%.