PART 3 — FIRE PROTECTION, OCCUPANT SAFETY AND ACCESSIBILITYUpdated for the 2024 Ontario Building Code
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3.7.4.3.Plumbing Fixtures for Assembly Occupancies
(1) Except as provided by Sentences (2) to (16) and Sentence 3.7.4.2.(10), the number of water closets required for
assembly occupancies shall conform to Table 3.7.4.3.-A.
Table 3.7.4.3.-A
Water Closets for Assembly Occupancies
Forming Part of Sentence 3.7.4.3.(1)
Minimum Number of Water Closets for Minimum Number of Water Closets for
Number of Persons of Each Sex
Males Females
1 - 25 1 1
26 - 50 1 2
51 - 75 2 3
76 - 100 2 4
101 - 125 3 5
126 - 150 3 6
151 - 175 4 7
176 - 200 4 8
201 - 250 5 9
251 - 300 5 10
301 - 350 6 11
351 - 400 6 12
7 plus 1 for each additional increment 13 plus 1 for each additional increment
Over 400
of 200 males in excess of 400 of 100 females in excess of 400
(2) Except for motion picture theatres, the number of water closets required for Group A, Division 1 occupancies shall
conform to Table 3.7.4.3.-B.
Table 3.7.4.3.-B
Water Closets for Assembly Occupancies
Forming Part of Sentence 3.7.4.3.(2)
Minimum Number of Water Closets for Minimum Number of Water Closets for
Number of Persons of Each Sex
Males Females
1 to 50 1 2
51 to 75 2 3
76 to 100 2 4
101 to 125 3 5
126 to 150 3 6
151 to 175 4 7
176 to 200 4 8
201 to 250 5 9
251 to 300 5 10
301 to 350 6 11
351 to 400 6 12
7 plus 1 for each additional increment of 13 plus 1 for each additional increment of
over 400
200 males in excess of 400 100 females in excess of 400
(3) The number of water closets required shall conform to Table 3.7.4.3.-C for
(a) motion picture theatres,
(b) Group A, Division 3 occupancies,
(c) Group A, Division 4 occupancies, and
(d) outdoor pools.
Table 3.7.4.3.-C
Water Closets for Assembly Occupancies
Forming Part of Sentences 3.7.4.3.(3) and 3.11.9.1.(4)
Number of Persons of Each Sex Minimum Number of Water Closets for Each Sex
1 to 50 1
51 to 150 2
151 to 250 3
251 to 375 4
376 to 500 5
6 plus 1 for each additional increment of
over 500
150 persons of each sex in excess of 500
(4) Except as provided in Sentences (6) and (7), the number of water closets required for dining rooms, restaurants and
cafeteria shall conform to Table 3.7.4.3.-D.
Table 3.7.4.3.-D
Water Closets for Assembly Occupancies
Forming Part of Sentences 3.7.4.3.(4) and (7)
Number of Persons of Each Sex Minimum Number of Water Closets for Each Sex
1 to 20 1
21 to 70 2
71 to 105 3
106 to 135 4
136 to 165 5
166 to 195 6
196 to 225 7
226 to 275 8
276 to 325 9
326 to 375 10
376 to 425 11
12 plus 1 for each additional increment of
over 425
50 persons of each sex in excess of 425
(5) The number of water closets required for establishments used primarily for the consumption of alcoholic beverages
that provide limited or no food service shall conform to Table 3.7.4.3.-E.
Table 3.7.4.3.-E
Water Closets for Assembly Occupancies
Forming Part of Sentences 3.7.4.3.(5) and 3.14.1.8.(1)
Number of Persons of Each Sex Minimum Number of Water Closets for Each Sex
1 to 50 2
51 to 70 3
71 to 90 4
91 to 110 5
111 to 140 6
141 to 180 7
181 to 220 8
221 to 260 9
10 plus 1 for each additional increment of
over 260
40 persons of each sex in excess of 260
(6) In every dining room, restaurant, cafeteria and alcoholic beverage establishment having more than 40 seats, separate
sanitary facilities shall be provided for employees, in addition to facilities provided for patrons, and the number of water
closets and lavatories required shall conform to Table 3.7.4.3.-F.
Table 3.7.4.3.-F
Plumbing Fixtures for Assembly Occupancies
Forming Part of Sentence 3.7.4.3.(6)
Minimum Number of Water Closets and Minimum Number of Water Closets and
Number of Employees of Each Sex
Lavatories for Males Lavatories for Females
1 to 9 1 1
10 to 24 2 2
25 to 49 3 3
50 to 74 4 4
75 to 100 5 5
6 plus 1 for each additional increment of 6 plus 1 for each additional increment of
over 100
30 male employees in excess of 100 30 female employees in excess of 100
(7) Except as provided in Sentence (8), in every dining room, restaurant, cafeteria and alcoholic beverage establishment
having not more than 40 seats, employees are permitted to share the sanitary facilities provided for patrons, and the
minimum number of water closets shall conform to Table 3.7.4.3.-D based on
(a) a male occupant load of 50% of the number of seats plus the number of male employees, and
(b) a female occupant load of 50% of the number of seats plus the number of female employees.
(8) Where a separate employee washroom is provided, the same room may be used by both female and male employees
provided that
(a) the total number of employees is not more than 5, and
(b) the door to the room can be locked from the inside.
(9) The number of employees in Sentences (6) to (8) shall be the maximum number of employees who are normally
present on the premises at one time and shall include only those who are present for more than 25 per cent of the working
day.
(10) For a parking lot that is part of a restaurant where patrons are intended to eat in vehicles parked on the lot, the
number of water closets required shall conform to,
(a) Table 3.7.4.3.-G where food service by employees is not provided on the parking lot, or
(b) Table 3.7.4.3.-H where employees serve food on the parking lot.
(11) The number of water closets required for drive-in theatres shall conform to Table 3.7.4.3.-H.
(12) The number of water closets required for dance halls and recreational establishments shall be at least one fixture for
each 100 males and one fixture for each 75 females.
(13) In a child care facility the maximum number of children per water closet and lavatory shall conform to Table
3.7.4.3.-I.
(14) The number of water closets required for elementary and secondary schools shall be at least one fixture for each 30
males and one fixture for each 26 females.
(15) The number of water closets required for non-residential college buildings shall be at least one fixture for each 100
males and one fixture for each 75 females.
(16) The number of water closets required for places of worship and undertaking premises shall be at least one fixture for
each 150 persons of each sex.
Table 3.7.4.3.-G
Water Closets for Assembly Occupancies
Forming part of Sentence 3.7.4.3.(10)
Minimum Number of Water Closets
Number of Parking Spaces
for Each Sex
1 to 20 1
21 to 70 2
71 to 105 3
106 to 135 4
136 to 165 5
166 to 195 6
196 to 225 7
226 to 275 8
276 to 325 9
326 to 375 10
376 to 425 11
12 plus 1 for each additional increment of 50
over 425
parking spaces in excess of 425
Table 3.7.4.3.-H
Water Closets for Assembly Occupancies
Forming part of Sentences 3.7.4.3.(10) and (11)
Minimum Number of Water Closets
Number of Parking Spaces
for Each Sex
1 to 40 1
41 to 140 2
141 to 210 3
211 to 270 4
271 to 330 5
331 to 390 6
391 to 450 7
451 to 550 8
551 to 650 9
651 to 750 10
751 to 850 11
12 plus 1 for each additional increment of 100
over 850
parking spaces in excess of 850
Table 3.7.4.3.-I
Plumbing Fixtures for a Child Care Facility
Forming Part of Sentence 3.7.4.3.(13)
Maximum Number of Children per
Age of Children
Water Closet and Lavatory
under 2 10 without regard to number of each sex
2 to 5 10 without regard to number of each sex
6 to 9 15 for males; 15 for females
over 9 30 for males; 26 for females
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.