a majority? not by my recollection of the survey as I recall about half is rented out, a substantial additional share is rent free family housing, a small share is occupied by the owner, and something like 25-30% is used for short term housing or something else
okay so about two thirds of ADUs are occupied as long term housing by paying tenants (43%), family & friends (18%), or the owner themself (~5%) the other most common uses are extra space (16%) or short term rental (8%) per this 2021 survey: www.aducalifornia.org/wp-content/u...
Iād misremembered that survey. I wonder how newer ADUs compare with the ADUs from that survey. I see so many ADUs now being built as a way to get more square footage for the main hose,
I would also expect that wealthier areas like Los Altos have more of that, since people have the money to spare (vs homeowners in the SFV who need to collect rent to justify such a big investment)
Definitely true, and also, developers build $8 million McMansions, and get even more floor area by adding ADUs, which I suspect rarely get used as housing.