The Ontario Building Code | Location of Plumbing Fixtures
220.127.116.11. Location of Plumbing Fixtures
(1) A room containing a water closet shall be located where,
(a) it does not open directly into any room or area where food or drink for human consumption, or an ingredient of food or drink for human consumption, is intended to be stored, prepared, processed, distributed, served, sold or offered for sale, and
(b) it is not necessary for the public to go through the food preparation areas to gain access to the plumbing fixtures.
(2) Except as permitted in Sentence (3), a room containing plumbing fixtures for the public and employees in a restaurant shall be located in the restaurant.
(3) A room containing plumbing fixtures for the public in Sentence (2) need not be located in the restaurant if,
(a) the room is located in the building containing the restaurant, and
(b) the distance of travel between the restaurant and the room is not more than 45 m.