Legalizing Unpermitted ADUs and JADUs Under AB 2533 What is AB 2533? California Assembly Bill 2533, effective January 1, 2025, creates an amnesty program for unpermitted Accessory Dwelling Units (ADUs) and Junior ADUs (JADUs) built before January 1, 2020. This program makes it easier for homeowners to legalize existing units without meeting all current zoning...