California residential & ADU permit data
The nation's largest ADU market
Housing law
California mandates ministerial (by-right) approval of accessory dwelling units statewide, with a 60-day decision deadline and one ADU plus one junior ADU allowed on most single-family lots; owner-occupancy is generally not required.
SB 9 allows by-right duplexes and urban lot splits on single-family lots, and newer transit-oriented upzoning (SB 79) phases in from 2026.
Jurisdictions we cover
Why Igni for California
Built for the #1 ADU market in the US
The only feed that flags SB-9 lot-splits and SB-10/SB-79 transit corridors
Clean sourcing from official open-data portals — public records, no gray-area scraping
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Sourced live from Los Angeles, San Francisco and San Diego official open-data portals (Socrata public records and San Diego's PDDL public-domain bulk data); plus Anaheim.
Informational only, not legal advice. Housing law changes — verify current statutes before relying on this.