2022 California Standards for Accessible Design Guide (effective January 1, 2023 with July 1, 2024 amendments)

11B-233.3.1.2.1 Elevator buildings.

A residential building with one or more elevators shall have an elevator serve all floors with a residential dwelling unit primary entrance and all floors with common use areas. Elevators shall comply with Section 11B-407. Residential dwelling units on floors served by an elevator shall be adaptable.
Exceptions:
1. A building with only an elevator that serves a parking garage or building entry level not containing residential dwelling units to the first ground floor above grade containing residential dwelling units.
2. A building with a multi-story residential dwelling unit with an elevator within the unit.