California Assembly Bill 1033 (2024) — allowed cities to opt in to permitting ADUs to be sold separately as condominium units, decoupling ownership of the ADU from the main house.
A potential game-changer for ADU economics. Berkeley adopted AB-1033 in 2024. If your city opts in, your ADU could appraise as an independent property and be financed/sold separately. Most California cities have not yet opted in as of April 2026.
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.