Congratulations. You've just arrived at the whole point of the article. The owners paid money to improve their house. Now they have to pay more to undo that if

Congratulations. You've just arrived at the whole point of the article. The owners paid money to improve their house. Now they have to pay more to undo that if they want to have a chance of selling it. That's a rather nasty thing to be hit with when you're trying to sell your house so that you can move.