Florida Building Code Plumbing Fixture Requirements

The required number of plumbing fixtures is calculated by: determining the occupant load for each occupancy area, applying the fixture ratios from FBC Table 403.1 for each occupancy, and rounding up to the nearest whole number. For mixed-occupancy buildings, the fixture count is calculated separately for each occupancy area and then combined. Common fixture ratios: Office (B): 1 water closet per 25 persons (first 50), then 1 per 50; Restaurant (A-2): 1 water closet per 75 persons; Retail (M): 1 water closet per 500 sq ft.

Florida law (FS 553.865) allows the use of gender-neutral restrooms in lieu of separate male and female restrooms for certain occupancies. Gender-neutral restrooms must have privacy partitions from floor to ceiling and must be designed to provide the same level of privacy as separate male and female restrooms.

Accessible restrooms must comply with FBC Chapter 11 and ADA Standards. Key requirements include: accessible toilet compartments (minimum 60 inches wide × 56 inches deep for wall-hung water closets), grab bars (36-inch side grab bar and 42-inch rear grab bar), accessible lavatories (knee clearance below the lavatory), and accessible mirrors (bottom of mirror no higher than 40 inches above the floor).