California ADU (2019 – 2023)

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This resource hub from California ADU (UC Berkeley’s Center for Community Innovation) features best practices for facilitating attached and detached ADU development in light of enabling state legislation passed in California in 2016.

Key insights:

Highlighted initiatives include:

  • Introducing pre-approved designs
  • Providing supportive project financing
  • Increasing public awareness of new ADU regulations.
  • Explore spatial visuals of ADU permitting and development in California (2018-2022)
  • Engage with previous research released by the Center for Community Innovation.

Past work notably includes a jurisdictional scan which grades municipal ADU ordinances based on their compliance with state legislation and use of best practices.

You can access their full suite of resources on their dedicated homepage.