【Zillow】Mapping America's Metropolitan Growth: Islands of Density in a Sea of No Growth

As America struggles with a housing affordability crisis, especially in the expensive coastal cities, reinvigorating outward expansion – in other words, sprawl – is generally regarded as unsustainable. This leaves densification as the main alternative.

That raises an important question. Should densification be confined to islands of density, as it is today, or should American cities also come to accept modest densification of the vast existing sea of no-growth? The two options are complementary, not mutually exclusive, and pursuing them jointly could allow cities to produce a greater number of homes and a richer mix of housing types than they could otherwise.

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