Does another story independently accessible of the ADU count towards floor area?

The determination of floor area inclusion of a non-ADU story depends on the specific proposal and the context of the other story's relation to the ADU. For example, if the other story shows design intent that the story will be used in conjunction with the ADU, the floor area of both stories may be counted. If the new story clearly argues design intent and logical reasoning that the non-ADU story is independent of the ADU and is for the use of the residents of the primary dwelling, it could be possible that the story is not included in the ADU floor area calculation. The ADU must have a separate entrance and cannot be internally connected to the other story, and the specific proposal may require additional information for the Planning Division to reasonably judge that the other story is separate. However, the non-ADU story of the structure would not be eligible for review and approval under the permit processing procedures for ADUs and would be reviewed through the standard entitlement process applicable to the non-ADU story as if the ADU was not present. This may include Design Review, depending on the area of the other story. The height of the entire structure would be limited by the permitted height applicable to the ADU.