Nine Years After Approval, Only 1 Percent of San Francisco’s Housing Units Built. Approximately nine years after San Francisco officials approved the construction of 25,700 housing units to address the city’s housing shortage, only 350 homes – 1.3 percent of the total – have been built, the San Francisco Chronicle reported January 16. “San Francisco lawmakers approved three historic, neighborhood-transforming redevelopment proposals during the 12 months leading up to summer 2011 …,” the Chronicle reported. “Even as housing prices have skyrocketed and developers…