2025 California Standards for Accessible Design Guide (effective January 1, 2026)
11B-809.10.6.1 Size.
When one or more shower stalls are provided within the same dwelling unit, at least one shower stall shall comply with one of the following:
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A transfer type shower compartment 36 inches (914 mm) wide by 36 inches (914 mm) deep, clear inside dimensions measured at center points of opposing sides, with an entrance opening 36 inches (914 mm) wide; or
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A shower stall 30 inches (762 mm) deep minimum by 60 inches (1524 mm) wide minimum with an entrance opening 60 inches (1524 mm) minimum. A water closet shall be permitted to project 12 inches (305 mm) maximum into the opening provided that 36 inches (914 mm) minimum clear space is maintained between the water closet and the shower wall as illustrated in Figure 11B-809.10.6.1 or;
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A shower stall 36 inches (914 mm) deep by 60 inches (1524 mm) wide minimum with an entrance 36 inches (914 mm) minimum when a wall is installed on the opening side.
FIGURE 11B-809.10.6.1 SHOWERS.
ETA Editor's Note:
From DSA's "Summary of New and Amended 2025 California Building Code (CBC) Regulations for Accessibility in the Triennial Code Cycle": "Amendment removes the reference to Section 11B-608.1 for accessible transfer showers and replaces the reference with specific shower requirements applicable to residential dwelling units with adaptable features."
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