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

11B-809.10.2 Number of complying bathing rooms and fixtures.

One bathing room and one fixture of each type within the dwelling unit shall be designed to comply with the following:

1. Maneuvering space in toilet, bathing and shower rooms shall comply with Section 11B-809.10.4.

2. Bathtubs complying with Section 11B-809.10.5.

3. Showers complying with Section 11B-809.10.6.

4. Water closets complying with Section 11B-809.10.7.

5. Lavatories, vanities, mirrors and towel bars complying with Section 11B-809.10.8. When two or more lavatories are provided, at least one shall comply with Section 11B-809.10.8.

6. Where both a tub and shower are provided in the bathroom, at least one shall be made accessible. Where two or more bathrooms are provided, when a bathtub is installed in the first bathroom in compliance with Section 11B-809.10.5 and a shower compartment is provided in a subsequent bathroom, at least one shower compartment shall comply with Section 11B-809.10.6.