LA ADU construction reaches record high, accounts for 38% of new housing last year: USC

Los Angeles County’s backyard-housing boom is showing no signs of slowing as accessory dwelling unit construction reached an all-time high last year.  The county completed 10,230 ADUs in 2025, more than six times the 1,624 completed in 2018, the Los Angeles Daily News reported, citing a new report from the University of Southern California’s Lusk Center for Real Estate. ADUs made up 37.5 percent of the 27,293 housing units certified for occupancy last year, marking the highest share on record in the near-decade that USC has been tracking ADU production.  The surge came even as overall housing production dipped from […]

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