11B-610 Seats — 2025 California Building Code
California Building Code (Title 24, Part 2) · 2025 edition · updated 2026-09-25 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
Cite as: 2025 California Building Code (Title 24, Part 2) § 11B-610 · Effective January 1, 2026 · Official source: Building Standards Commission
11B- 610.1 General. Seats in bathtubs and shower compartments shall comply with Section 11B- 610 .
11B- 610.2 Bathtub seats. The top of bathtub seats shall be 17 inches ( 432 mm) minimum and 19 inches ( 483 mm) maximum above the bathroom finish floor. The depth of a removable in-tub seat shall be 15 inches ( 381 mm) minimum and 16 inches ( 406 mm) maximum. The seat shall be capable of secure placement. Permanent seats at the head end of the bathtub shall be 15 inches ( 381 mm) deep minimum and shall extend from the back wall to or beyond the outer edge of the bathtub.
FIGURE 11B- 610.2—BATHTUB SEATS
11B- 610.3 Shower compartment seats. A seat in a standard roll-in shower compartment shall be a folding type, shall be installed on the side wall adjacent to the controls, and shall extend from the back wall to a point within 3 inches ( 76 mm) of the compartment entry. A seat in an alternate roll-in type shower compartment shall be a folding type, shall be installed on the front wall opposite the back wall, and shall extend from the adjacent side wall to a point within 3 inches ( 76 mm) of the compartment entry. In transfer type showers, the seat shall extend from the back wall to a point within 3 inches ( 76 mm) of the compartment entry. The top of the seat shall be 17 inches ( 432 mm) minimum and 19 inches ( 483 mm) maximum above the bathroom finish floor. When folded, the seat shall extend 6 inches (152 mm) maximum from the mounting wall. Seats shall comply with Section 11B- 610.3.1 or 11B- 610.3.2.
FIGURE 11B -610.3—EXTENT OF SEAT
ACCESSIBILITY TO PUBLIC BUILDINGS, PUBLIC ACCOMMODATIONS, COMMERCIAL BUILDINGS AND PUBLIC HOUSING
11B- 610.3.1 Rectangular seats. The rear edge of a rectangular seat shall be 2 1/2 inches (64 mm) maximum and the front edge 15 inches ( 381 mm) minimum and 16 inches ( 406 mm) maximum from the seat wall. The side edge of the seat shall be 1 1/2 inches (38 mm) maximum from the adjacent wall.
FIGURE 11B- 610.3.1—RECTANGULAR SHOWER SEAT
11B- 610.3.2 L-shaped seats. The rear edge of an L-shaped seat shall be 2 1/2 inches (64 mm) maximum and the front edge 15 inches ( 381 mm) minimum and 16 inches ( 406 mm) maximum from the seat wall. The rear edge of the “L” portion of the seat shall be 1 1/2 inches (38 mm) maximum from the wall and the front edge shall be 14 inches ( 356 mm) minimum and 15 inches ( 381 mm) maximum from the wall. The end of the “L” shall be 22 inches ( 559 mm) minimum and 23 inches ( 584 mm) maximum from the main seat wall.
FIGURE 11B- 610.3.2—L-SHAPED SHOWER SEAT
11B- 610.4 Structural strength. Allowable stresses shall not be exceeded for materials used when a vertical or horizontal force of 250 pounds (1112 N) is applied at any point on the seat, fastener, mounting device or supporting structure.
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