California Senate Bill 13 (2019) — eliminated impact fees for ADUs under 750 sqft, capped permit fees, and removed local owner-occupancy requirements through 2025.
The first major piece of modern California ADU legislation, opening the door to the AB-2221/976/1033 framework that followed.
Part of the BackyardADU California ADU Glossary — plain-English definitions of the regulatory, construction, and financing terms you'll encounter during a California ADU project.