Accessory dwelling units or ADUs are useful additions to single-family dwellings that can solve issues you have with your home. People have also hoped that ADUs could help solve the housing crisis. But, can they? Here are some ADU statistics to shed light on exactly where and how many ADUs are being built and whether or not you should jump on the trend.
How Many ADUs Have Been Built in California?
There is no specific accounting of how many ADUs there are in the state. However, creating an estimate based on how many permits have been granted isn’t unreasonable. Since 2012, 32,585 ADU permits have been granted by the state of California. That would suggest that 32,585 ADUs have been built in the state. However, there may be some cases of ADUs not being finished after the homeowner has been granted a permit, as well as illegal ADU conversions that have not been accounted for.
The overall trend of ADUs is heading up. There were, by far, more ADU permits issues in 2019 than any previous year. In 2019 there were 14,702 permits for ADUs issued in the state. That is almost double the 8,900 issued in 2018, which is double the 4,974 issued in 2017. While ADU permits have been around for many years before this, their popularity has just begun to skyrocket.
The city of Los Angeles has the most ADU permits issued, at 6,747 permits in 2019. San Francisco and Oakland are roughly even for second place, and San Jose and Sacramento follow behind.
But believe it or not, California does not lead North America when it comes to ADU construction. There are actually more ADUs built in Vancouver, British Columbia, as a percentage of total family housing units, than anywhere in California.