2019 California Standards for Accessible Design Guide (effective January 1, 2020 with July 1, 2021 amendments)

11B-233.3.1.2.5 Multi-story residential dwelling units in buildings with no elevator.

In non-elevator buildings, a minimum of 10 percent but not less than one of the ground floor multi-story residential dwelling units shall be calculated using the total number of multi-story residential dwelling units in buildings on a site and shall comply with the following:

1. The primary entry of the multi-story residential dwelling unit shall be on an accessible route.

2. At least one powder room or bathroom shall be located on the primary entry level.

3. Rooms or spaces located on the primary entry level shall be served by an accessible route and comply with Sections 11B-809.6 through 11B-809.12.