for every formal permitted ADU that was built in San Jose between 2016 and 2020, it is estimated that seven to eight unpermitted ADUs were built in the same time frame, he said. Ouyang points out ...

So, they opted for another solution: building an accessory dwelling unit, or ADU, in their parent's backyard. Today, they live in a 1,200-square-foot, three-bedroom, two-bathroom ADU in San Ramon ...