This is a granular, city-by-city, annual chart depiction of ADU permit trends in California. In California at large, the permit numbers increased from 1,269 ADU permits in 2016 to 14,702 in 2019—-a remarkable 11-fold increase in ADU permits in 3 years, due largely to changes in state legislation over that time span
Welcome to the Building an ADU blog. You can expect regular posts here about all facets of building an ADU--from financing, to permitting, to designing to building.