Over the past two decades, San Francisco has produced an average of 1,500 new housing units per year. Compare this with Seattle (another 19th century industrial city that now has a tech economy), which has produced about 3,000 units per year over the same time period (and remember it’s starting from a smaller overall population base). While Seattle decided to embrace infill development as a way to save open space at the edge of its region and put more people in neighborhoods where they could walk, San Francisco decided to push regional population growth somewhere else.

via The San Francisco Exodus – Gabriel Metcalf – The Atlantic Cities.