Group houses--with unrelated individuals living under one roof--have long been issues in college towns. But those living arrangements have increased recently and are necessary, according to Slate's Henry Grabar.

Complaints by neighborhood associations about “mini-dorms” go back decades. But the problem has grown more acute in recent years, as rents have gone through the roof.

Even though the occupants of group housing are changing, neighborhood concerns are still the same.

Over-occupied housing can no longer be characterized as an issue about college students. But the problem it presents to home owners yearning for a neighborhood of nuclear families persists, even if beer pong and loud music don’t.

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