The Americans With Disabilities Act mandates a handicapped-accessible toilet be 17 to 19 inches from the top of the seat to the floor. If the toilet is for children, the height must be between 11 and 17 inches. Standard toilets measure 17 inches or lower, with 14.5 inches being common.
Additional requirements regarding handicapped-accessible toilets include having a clear floor space of 48 inches between the walls on either side of the toilet. They must also feature grab bars, and the flush control must be automatic or able to be used with one hand. Toilet paper holders must be located "within reach."