According to the ADU regulations established on the territory of the California state, a primary single-family residence located on the property land can be added by not more than two accessory dwelling units, which are an ADU and a JADU types. The first accessory dwelling unit can be either attached or detached, whereas the junior accessory dwelling unit can represent only a secondary structure that is a part of your existing primary dwelling unit. It is not allowed for a family-owned residence to have two detached ADUs simultaneously.