ADUs for Sale? San Diego Could Legalize Backyard Condos

As one of 25 proposed amendments, San Diego may soon allow accessory dwelling units to be bought and sold as individual homes.

1 minute read

June 1, 2025, 9:00 AM PDT

By Diana Ionescu @aworkoffiction


White accessory dwelling unit in backyard of small grey home in Seattle, Washington.

A backyard cottage in Seattle, Washington. | Sightline Institute / Flickr

A proposed amendment to San Diego’s accessory dwelling unit (ADU) regulations would allow property owners to sell ADUs separately from the main home, reports Jake Gotta for KPBS. “[The amendments] would allow all the market-rate ADUs moving forward to be sellable as individual homes — often for far less than the single-family homes they sit behind.”

The units would function much like condos, which are currently not permitted in single-family zoned neighborhoods. In a city with a median home price of over $1 million, the change could open up the possibility of homeownership for many more San Diegans.

Last August, San Jose became the first California city to legalize the sale of ADUs as condos. San Francisco is also considering a similar measure. A California state law passed in 2023, AB 1033, allows property owners to sell ADUs by setting up a homeowners association for the main house and treating the ADU as a condo, with governing documents for the maintenance of shared areas and infrastructure.

Wednesday, May 28, 2025 in KPBS

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