https://www.mercurynews.com/2019/08/01/permits-for-new-bay-area-homes-apartments-drop-sharply/

Despite a pressing demand for new homes, condos and apartments, residential building permits in California fell 16 percent in the last year, dropping for the first time since the recession nearly a decade ago.

In the Bay Area, permits to build new homes and apartments tanked — falling nearly 50 percent in San Mateo County compared with the prior year, 30 percent in Alameda County, nearly 10 percent in Santa Clara County and 7 percent in Contra Costa County, according to a new analysis by the Public Policy Institute of California.