Take Banff for instance: it’s in a national park and is legally restricted from growing much more. You could approve more building, but then more people would move in until prices were high again. The area is so appealing that no matter how much housing there was, people would flood in until it became saturated again. Unless you ruined it, bulldozed the forests for 100km in every direction, covered the area in housing—that would do the trick. But who wants that?

In a couple of cases, building more housing isn’t the ideal solution