California ADU Permits & Data
ADU permit data for every California jurisdiction, sourced directly from HCD Annual Progress Reports. Tracks permits filed, issued, and completed from 2018 to present.
Statewide Overview
[X]
Total ADU Permits (Latest Year)
[X]%
Year-over-Year Growth
[X]
Jurisdictions Reporting
Bar Chart: Statewide ADU Permits by Year
2018 – Present · Source: CA HCD Annual Progress Reports
California issued [X] ADU permits in [year], representing approximately [X]% of the state's total new housing starts.
Source: California HCD Annual Progress Reports
City & County Rankings
Jurisdictions ranked by total ADU permit activity. Only jurisdictions with 10 or more total permits across all available years are included.
| Rank | Jurisdiction | Permits Filed | Permits Issued | Completions | ADU % of Total Housing | YoY Growth |
|---|---|---|---|---|---|---|
| City-level data will be populated from HCD Annual Progress Report data. Each row will link to a dedicated city page. | ||||||
HCD APR data needed
Download CA HCD APR dataset, parse by jurisdiction, filter to jurisdictions with 10+ total ADU permits, calculate rankings, YoY growth, and ADU share of total housing permits.
Data Source & Methodology
All data is sourced from California HCD Annual Progress Reports. Every California city and county is legally required to submit annual housing data to HCD. The dataset includes permits filed, entitled, issued, and completed, broken out by unit type including ADUs.
Download original data: CA HCD APR Dashboard
Suggested Citation
Dwelling Index. (2026). California ADU Permits & Data by City (2018-2026). Retrieved from https://dwellingindex.com/research/california-adu-permits/