We are adding a bathroom to the second level of a existing building that is employee only use. They are citing accessibility requirements, but the stairs are non-compliant and not accessible to a handicapped person. They agreed that that portion is grandfathered in but they keep pushing of the bathroom needs to be ADA compliant. Can anybody point me towards articles are lawsuits that show accessibility has to be made in the first place for the structure to be ADA compliant?