alt Hacker NewsAdditional property tax? Do you have any idea what property taxes are like in places like NJ, NY? It's 2-3% of the value, sometimes assessed at sales value. People buy despite this because they like an area or a school system. If you raise it more, rest assured that only the rich will have the right to buy. It's as regressive as it gets, your proposal.
I mentioned this in another comment but - this thread is interesting as it shows the differences in housing policies / issues in different parts of the country. I'm from the Midwest / Chicago where we have a lot more land to work with so the policies are slightly different.
That being said, it sounds like a land value tax might be a better approach to my first suggestion. Regardless, this would not effect people that truly "own and live in their only house"