The shattered moon particles would have spread around Saturn, and any of them that were on a tilted orbit would quickly collide with others, and in the end that would average out all their orbits to form a flattened ring.
So American houses are certainly not the global norms and averaging out all of these numbers gives us a building living with 90, 860 square kilometers of living space in a two-dimensional view.
There's about 24.6 million square miles of habitable land on Earth, so if we average out the space between every chimney, that gives us about 0.026 square miles per household.