The Ontario Building Code | Plumbing Fixtures for Other Residential Occupancies
3.7.4.6. Plumbing Fixtures for Other residential Occupancies
(1) Except for dwelling units and as provided in Sentence (2), the number of water closets required for residential occupancies shall conform to Table 3.7.4.6.
Table 3.7.4.6.
water Closets For residential Occupancies
Forming Part of Sentence 3.7.4.6.(1)
| Item | Column 1 Number of Persons of Each Sex | Column 2 Minimum Number of water Closets for Each Sex |
| 1. | up to 9 | 1 |
| 2. | 10 to 24 | 2 |
| 3. | 25 to 49 | 3 |
| 4. | 50 to 74 | 4 |
| 5. | 75 to 100 | 5 |
| 6. | over 100 | 6 plus 1 for each additional increment of 30 persons of each sex in excess of 100 |
(2) At least one water closet or privy shall be provided for every,
(a) 10 campers of each sex in a recreational camp, and
(b) 10 employees of each sex in a camp for housing of workers.
(3) In recreational camps and camps for housing of workers, no fewer than two lavatories or provision for a pail or other portable container of sound construction shall be provided for each of the water closets or privies required in Sentence (2).
(4) A camp for housing of workers shall include,
(a) at least one shower or other area of bathing, and
(b) provisions for at least one washing machine or laundry tub for every 15 beds.
In Plain Language
For residential occupancies other than individual dwelling units, like boarding houses and dormitories, the required number of water closets is set out in a dedicated fixture-count table.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.