Skip to content
BCIN ExamBCIN Exam

Code guide

Ontario Building Code Bathroom Requirements

Bathroom rules in the 2024 Ontario Building Code: required fixtures, 25 L/s exhaust fan, 2,100 mm ceiling, waterproof finishes and the 49°C shower limit.
max water temperature at a shower head or tub
49°C
max water temperature at a shower head or tub
supplemental bathroom exhaust fan, where required
25 L/s
supplemental bathroom exhaust fan, where required
ceiling height where a person stands, above grade
2,100 mm
ceiling height where a person stands, above grade
waterproof finish height in a shower stall
1.8 m
waterproof finish height in a shower stall

Last updated

Under the 2024 Ontario Building Code, every dwelling unit with a water supply needs a lavatory, a bathtub or shower and a water closet, along with a kitchen sink (OBC Div. B 9.31.4.1.OBC Div. B 9.31.4.1. Required Fixtures(1) A kitchen sink, lavatory, bathtub or shower, and water closet shall be provided for every dwelling unit where a water distribution system is available.). The bathroom itself needs ventilation (a 25 L/s supplemental exhaust fan where the principal ventilation fan does not draw from it, OBC Div. B 9.32.3.7.OBC Div. B 9.32.3.7. Supplemental Exhaust(1) Except as provided in Sentences (2) and (3), a supplemental exhaust fan with a rated capacity not less than 50 L/s shall be installed in each kitchen. (2) A supplemental exhaust fan is not required in a kitchen where the only exhaust air intake for the principal ventilation fan is located in that kitchen. (3) A…), a ceiling of 2,100 mm where people stand (Table 9.5.3.1.OBC Div. B Table 9.5.3.1. Room Ceiling Heights — Forming Part of Sentences 9.5.3.1.(1) and (4)Table 9.5.3.1 — Room Ceiling Heights — Forming Part of Sentences 9.5.3.1.(1) and (4) Room or Space | Minimum Heights[1] Living room or space, dining room or space, kitchen or kitchen space | 2,300 mm over at least 75% of the required floor area with a clear height of 2,100 mm at any point over the required area…), waterproof finishes around the tub and shower, and shower water that is limited to 49°C (OBC Div. B 7.2.10.7.OBC Div. B 7.2.10.7. Water Temperature Control(1) Except as provided in Sentences (2) and (3), water supplied to shower heads or bathtubs shall be controlled by an automatic compensating valve conforming to (a) ASME A112.18.1 / CSA B125.1, "Plumbing Supply Fittings," or (b) ASSE 1016 / ASME A112.1016 / CSA B125.16, "Performance Requirements for Automatic…).

The rules are spread across Part 9 (rooms, finishes, ventilation) and Part 7 (plumbing) of Division B. This page pulls the bathroom pieces together for houses and other dwelling units. Your building department may add permit conditions, so confirm with it before you build or renovate.

Bathroom rules at a glance

Topic Key rule Article
Required fixtures lavatory, bathtub or shower, water closet (plus kitchen sink) 9.31.4.1.
Hot water required; service hot water 45°C to 60°C 9.31.4.2., 9.31.6.1A.
Natural ventilation 0.09 m² openable area Table 9.32.2.2.
Exhaust fan 25 L/s where no principal fan intake in the room 9.32.3.7.(4)
Ceiling height (above grade) 2,100 mm where a person would stand Table 9.5.3.1.
Door size 610 mm by 1,980 mm Table 9.5.5.1.
Waterproof wall finish 1.8 m shower, 1.2 m tub with shower, 400 mm tub only 9.29.2.1.
Shower and tub water 49°C maximum 7.2.10.7., 7.2.10.7B.
Grab bars, if installed resist 1.3 kN 9.31.2.3.

This is our own summary, not a copy of any code table. Read each article in full before relying on it.

Required fixtures and hot water

Section 9.31 covers plumbing facilities within dwelling units (9.31.1.1.OBC Div. B 9.31.1.1. Application(1) This Section applies to the plumbing facilities and plumbing systems within dwelling units. (2) In occupancies other than dwelling units, plumbing facilities, grab bars, floor drains, and floor and wall finishes around urinals shall conform to Subsection 3.7.4. (See also Section 3.8. regarding barrier-free…). Where a water distribution system is available, each dwelling unit needs a kitchen sink, lavatory, bathtub or shower, and water closet (9.31.4.1.OBC Div. B 9.31.4.1. Required Fixtures(1) A kitchen sink, lavatory, bathtub or shower, and water closet shall be provided for every dwelling unit where a water distribution system is available.), and a hot water supply (9.31.4.2.OBC Div. B 9.31.4.2. Hot Water Supply(1) Where a water distribution system is available a hot water supply shall be provided in every dwelling unit. (2) A water distribution system supplying hot water to plumbing fixtures shall conform to the requirements in Subsection 7.2.10.). The water heating equipment must supply service hot water in a range of 45°C to 60°C, and an electric storage-type water heater needs a minimum set storage temperature of 60°C (9.31.6.1A.OBC Div. B 9.31.6.1A. Hot Water Temperature(1) Where a hot water supply is required by Article 9.31.4.3., equipment shall be installed to provide to every dwelling unit an adequate supply of service hot water with a temperature range from 45°C to 60°C. (2) An electric storage-type service water heater shall have a minimum set storage temperature of 60°C.).

How the fixtures are drained, vented and supplied is Part 7 work: Section 9.31 sends plumbing systems there (9.31.2.1.OBC Div. B 9.31.2.1. General(1) The construction, extension, alteration, renewal or repair of plumbing systems and sewage disposal systems shall conform to Part 7.). See the Ontario plumbing code for how Part 7 is organised.

Note that 9.31.4.1. lists the fixtures for each dwelling unit, not for each room, so a powder room and a separate shower room can share the list between them.

Scald protection: 49°C at the shower

An electric storage tank is set to at least 60°C, so the code limits what reaches the bather:

  • Shower and tub controls. Water supplied to shower heads or bathtubs must be controlled by an automatic compensating valve meeting the listed CSA or ASSE standard. A temperature-limiting device or a single tempered water line can be used instead in the cases set out in the article (7.2.10.7.(1) to (3)OBC Div. B 7.2.10.7. Water Temperature Control(1) Except as provided in Sentences (2) and (3), water supplied to shower heads or bathtubs shall be controlled by an automatic compensating valve conforming to (a) ASME A112.18.1 / CSA B125.1, "Plumbing Supply Fittings," or (b) ASSE 1016 / ASME A112.1016 / CSA B125.16, "Performance Requirements for Automatic…).
  • Maximum temperature. Water discharging from a shower head or into a bathtub must not exceed 49°C. Dishwashers and clothes washers are not covered by that limit (7.2.10.7.(4) and (6)OBC Div. B 7.2.10.7. Water Temperature Control(1) Except as provided in Sentences (2) and (3), water supplied to shower heads or bathtubs shall be controlled by an automatic compensating valve conforming to (a) ASME A112.18.1 / CSA B125.1, "Plumbing Supply Fittings," or (b) ASSE 1016 / ASME A112.1016 / CSA B125.16, "Performance Requirements for Automatic…).
  • Fixed shower heads. Each valve supplying a fixed shower head must be an individually pressure-balanced or thermostatic-mixing valve. These valves must limit thermal shock, and either be designed so the outlet does not exceed 49°C or have high-limit stops set to 49°C maximum (7.2.10.7B.OBC Div. B 7.2.10.7B. Showers(1) Except as provided for in Sentences (2) and (3), all valves supplying fixed location shower heads, shall be individually pressure-balanced or thermostatic-mixing valves, conforming to ASME A112.18.1 / CSA B125.1, "Plumbing Supply Fittings." (2) An individually pressure-balanced or thermostatic-mixing valve is not…). Deck-mounted hand-held spray attachments are exempt from the thermal shock rules.

Health care facilities and retirement homes have a lower 43°C limit (7.2.10.7.(5)OBC Div. B 7.2.10.7. Water Temperature Control(1) Except as provided in Sentences (2) and (3), water supplied to shower heads or bathtubs shall be controlled by an automatic compensating valve conforming to (a) ASME A112.18.1 / CSA B125.1, "Plumbing Supply Fittings," or (b) ASSE 1016 / ASME A112.1016 / CSA B125.16, "Performance Requirements for Automatic…).

Ventilation and exhaust fans

Every residential occupancy needs non-heating-season ventilation, and a house with power and a heating system also needs heating-season ventilation (9.32.1.2.OBC Div. B 9.32.1.2. Required Ventilation(1) Every residential occupancy shall incorporate (a) provisions for non-heating-season ventilation in accordance with Subsection 9.32.2., and (b) except as required by Sentences (2) and (3), if supplied with electrical power and a heating system, provisions for heating-season ventilation in accordance with Part 6…).

Non-heating season. This can be natural or mechanical (9.32.2.1.OBC Div. B 9.32.2.1. Required Ventilation(1) The non-heating-season ventilation required by Clause 9.32.1.2.(1)(a) shall be supplied by (a) natural ventilation in accordance with Article 9.32.2.2., or (b) a mechanical ventilation system in accordance with Article 9.32.2.3.). A bathroom or water-closet room in a dwelling unit ventilated by natural means needs at least 0.09 m² of unobstructed openable area to the outdoors (Table 9.32.2.2.OBC Div. B Table 9.32.2.2. Natural Ventilation - Forming Part of Sentence 9.32.2.2.(1)Table 9.32.2.2. Natural Ventilation - Forming Part of Sentence 9.32.2.2.(1) Forming Part of Sentence 9.32.2.2.(1) Application | Location | Minimum Unobstructed Area Within a dwelling unit | Bathrooms or water-closet rooms | 0.09 m² Within a dwelling unit | Unfinished basement space | 0.2% of the floor area Within a…). A window does not have to be provided at all where there is electric lighting (Table 9.7.2.3.OBC Div. B Table 9.7.2.3. Glass Areas for Rooms of Residential Occupancy — Forming Part of Sentence 9.7.2.3.(1)Table 9.7.2.3 — Glass Areas for Rooms of Residential Occupancy — Forming Part of Sentence 9.7.2.3.(1) Location | Minimum Unobstructed Glass Area — With No Electric Lighting | Minimum Unobstructed Glass Area — With Electric Lighting Laundry, basement recreation room, unfinished basement | 4% of area served | Windows…), so a windowless bathroom relies on electric lighting and mechanical ventilation. See Ontario window requirements.

Heating season. In a self-contained system under Subsection 9.32.3., the principal ventilation fan may draw from the bathroom. If its exhaust intake is not in the bathroom or water-closet room, that room needs a supplemental exhaust fan rated at not less than 25 L/s (9.32.3.7.(4)OBC Div. B 9.32.3.7. Supplemental Exhaust(1) Except as provided in Sentences (2) and (3), a supplemental exhaust fan with a rated capacity not less than 50 L/s shall be installed in each kitchen. (2) A supplemental exhaust fan is not required in a kitchen where the only exhaust air intake for the principal ventilation fan is located in that kitchen. (3) A…). Details that inspectors check:

  • Switch in the room. The supplemental fan must have a manual switch in the room it serves. If a dehumidistat or timer also controls it, the manual switch must still turn the fan on at any setting (9.32.3.7.(6) and (8)OBC Div. B 9.32.3.7. Supplemental Exhaust(1) Except as provided in Sentences (2) and (3), a supplemental exhaust fan with a rated capacity not less than 50 L/s shall be installed in each kitchen. (2) A supplemental exhaust fan is not required in a kitchen where the only exhaust air intake for the principal ventilation fan is located in that kitchen. (3) A…).
  • Intake height. A principal ventilation intake in a bathroom must be in the ceiling or on the wall at least 2 m above the floor (9.32.3.3.(10)OBC Div. B 9.32.3.3. Principal Ventilation System(1) The principal ventilation system shall incorporate the following components: (a) a principal ventilation fan complying with this Article, and (b) except as permitted by Article 9.32.3.6., provision for the introduction of outdoor air to the dwelling unit, in conformance with Article 9.32.3.4. or 9.32.3.5. (2) The…).
  • Noise. A supplemental bathroom fan with less than 1 m of duct to the room must have a sound rating of not more than 2.5 sones under CAN/CSA-C260-M, or 3.5 under HVI 915 (9.32.3.10.(6)OBC Div. B 9.32.3.10. Fans(1) Except as provided in Sentence (4), capacity ratings for required fans shall be determined in accordance with (a) CAN/CSA-C260-M, "Rating the Performance of Residential Mechanical Ventilating Equipment," or (b) HVI Publication 916, "Airflow Test Procedure." (2) Sound ratings for fans shall be determined in…, Table 9.32.3.10.-BOBC Div. B Table 9.32.3.10-B. Maximum Sound Rating for Fans - Forming Part of Sentence 9.32.3.10.(6)Table 9.32.3.10.-B Maximum Sound Rating for Fans - Forming Part of Sentence 9.32.3.10.(6) Forming Part of Sentence 9.32.3.10.(6) Fan Application | Maximum Sound Rating according to CAN/-C260-M, sones | Maximum Sound Rating according to HVI 915 Principal exhaust fan | 2.0 | 2.5 Supplemental exhaust fans installed in…).
  • Outlet location. Bathroom exhaust outlets must be at least 1,800 mm from air intakes and vented soffits, with soffit blocking where they are closer, and must have backdraft dampers (9.32.3.13.(4) to (6) and (11)OBC Div. B 9.32.3.13. Outdoor Intake and Exhaust Openings(1) Intake openings shall be located so as to avoid contamination of the ventilation air from other local sources such as automobile exhaust and exhaust from the building or adjacent buildings. (2) The distance from the bottom of an air intake opening to finished ground or to any nearer and lower permanent horizontal…).

Ceiling height and door size

Above grade, a bathroom, water-closet room or laundry area needs a ceiling height of 2,100 mm wherever a person would normally stand (Table 9.5.3.1.OBC Div. B Table 9.5.3.1. Room Ceiling Heights — Forming Part of Sentences 9.5.3.1.(1) and (4)Table 9.5.3.1 — Room Ceiling Heights — Forming Part of Sentences 9.5.3.1.(1) and (4) Room or Space | Minimum Heights[1] Living room or space, dining room or space, kitchen or kitchen space | 2,300 mm over at least 75% of the required floor area with a clear height of 2,100 mm at any point over the required area…). The rule is tied to standing areas, not the whole floor. That table row is for bathrooms above grade; the table has a separate row for basement space, and in a secondary suite ceilings must be at least 1.95 m (9.5.3.1.OBC Div. B 9.5.3.1. Ceiling Heights of Rooms or Spaces(1) Except as provided in Sentences (2) and (3), the ceiling heights and clear heights in rooms or spaces in residential occupancies and live/work units shall conform to Table 9.5.3.1. (2) Ceiling heights in secondary suites shall be not less than 1.95 m. (3) Clear heights under beams and ducting in secondary suites…). See Ontario ceiling height and room sizes.

Doorways within a dwelling unit must fit at least the door sizes in Table 9.5.5.1. (9.5.5.1.OBC Div. B 9.5.5.1. Doorway Opening Sizes(1) Except as provided in Sentence (2) and Articles 9.5.5.3., 9.9.6.2. and 9.9.6.3., doorway openings within dwelling units and within houses with a secondary suite including their common spaces shall be designed to accommodate at least the door sizes given in Table 9.5.5.1. for swing-type and folding doors. (2)…). For a bathroom, water-closet room or shower room, that is 610 mm wide by 1,980 mm high (Table 9.5.5.1.OBC Div. B Table 9.5.5.1. Minimum Door Sizes — Forming Part of Sentence 9.5.5.1.(1)Table 9.5.5.1 — Minimum Door Sizes — Forming Part of Sentence 9.5.5.1.(1) At Entrance to: | Minimum Width, mm | Minimum Height, mm Dwelling unit or house with a secondary suite including common spaces (required entrance) Vestibule or entrance hall | 810 | 1,980 Stairs to a floor level that contains a finished space…). Where a suite has a barrier-free path of travel to Section 3.8. and a bathroom is on the entrance level, that bathroom door needs a clear opening of 760 mm or 810 mm, depending on the width of the corridor serving it (9.5.5.3.OBC Div. B 9.5.5.3. Doors to Bathrooms(1) Where a barrier-free path of travel conforming to Section 3.8. is provided into a suite of residential occupancy and where a bathroom within the suite is at the level of the suite entrance door, the doorway to such bathroom and to each bedroom at the same level as such bathroom shall have, when the door is in the…).

Waterproof walls and floors

  • Wall finish height. Waterproof finish is required to at least 1.8 m above the floor in shower stalls, 1.2 m above the rim of a bathtub with a shower, and 400 mm above the rim of a bathtub without one (9.29.2.1.OBC Div. B 9.29.2.1. Where Required(1) Waterproof finish shall be provided to a height of not less than (a) 1.8 m above the floor in shower stalls, (b) 1.2 m above the rims of bathtubs equipped with showers, and (c) 400 mm above the rims of bathtubs not equipped with showers.).
  • Materials. Ceramic, plastic or metal tile, sheet vinyl, tempered hardboard, laminated thermosetting decorative sheets or linoleum (9.29.2.2.OBC Div. B 9.29.2.2. Materials(1) Waterproof finish shall consist of ceramic, plastic or metal tile, sheet vinyl, tempered hardboard, laminated thermosetting decorative sheets or linoleum.).
  • Tile backing. Ceramic and plastic tile on walls around tubs and showers goes over moisture-resistant backing (9.29.10.4.OBC Div. B 9.29.10.4. Moisture Resistant Backing(1) Ceramic and plastic tile installed on walls around bathtubs or showers shall be applied over moisture-resistant backing.), and the joint between tile and tub or shower is caulked with a mildew-resistant sealant to CAN/CGSB-19.22-M (9.29.10.5.OBC Div. B 9.29.10.5. Joints Between Tiles and Bathtub(1) The joints between wall tiles and a bathtub or shower shall be suitably caulked with material conforming to CAN/CGSB-19.22-M, "Mildew Resistant Sealing Compound for Tubs and Tiles.").
  • Shower receptors. Must be built so water cannot leak through the walls or floor (7.2.2.3.(1)OBC Div. B 7.2.2.3. Showers(1) Shower receptors shall be constructed and arranged so that water cannot leak through the walls or floor. (See Note A-7.2.2.3.(1)) (2) Not more than 6 shower heads shall be served by a single shower drain. (3) Where 2 or more shower heads are served by a shower drain, the floor shall be sloped and the drain located…).
  • Floors. Bathroom flooring must be resilient flooring, concrete, terrazzo, ceramic tile or another material with similar water resistance (9.30.1.2.OBC Div. B 9.30.1.2. Water Resistance(1) Finished flooring in bathrooms, kitchens, public entrance halls, laundry and general storage areas shall consist of resilient flooring, felted-synthetic-fibre floor coverings, concrete, terrazzo, ceramic tile, mastic or other types of flooring providing similar degrees of water resistance. (See Note A-9.30.1.2.(1))).

Wall and ceiling finishes in bathrooms within suites also need a flame-spread rating of not more than 200 (9.10.17.11.OBC Div. B 9.10.17.11. Walls and Ceilings in Bathrooms(1) The interior finish of walls and ceilings in bathrooms within suites of residential occupancy shall have a surface flame-spread rating of not more than 200.).

Grab bars and barrier-free bathrooms

Houses, semi-detached houses, houses with a secondary suite, duplexes, triplexes and row houses do not have to meet the barrier-free rules of Section 3.8. (9.5.2.1.OBC Div. B 9.5.2.1. General(1) Except as provided in Sentence (2) and Article 3.8.1.1., every building shall be designed in conformance with Section 3.8. (2) The requirements of Section 3.8. need not be provided for detached houses, semi-detached houses, houses with a secondary suite, duplexes, triplexes, row houses and boarding or rooming…). Two rules still apply in a house:

  • Future grab bars. Where wood or sheet steel studs enclose the main bathroom of a dwelling unit, reinforcement must be installed so grab bars can be added later beside the water closet, in the shower and at the bathtub (9.5.2.4.OBC Div. B 9.5.2.4. Stud Wall Reinforcement(1) If wood wall studs or sheet steel wall studs enclose the main bathroom in a dwelling unit, reinforcement shall be installed to permit the future installation of the following: (a) for a water closet, a grab bar described in Clauses 3.8.3.8.(3)(a) and a grab bar described in Clause 3.8.3.8.(3)(c), (b) for a shower…).
  • Installed grab bars. When provided, a grab bar must resist a load of at least 1.3 kN applied vertically or horizontally (9.31.2.3.OBC Div. B 9.31.2.3. Grab Bars(1) When provided, grab bars shall be capable of resisting a load of not less than 1.3 kN applied vertically or horizontally.).

Washrooms outside dwelling units, such as in shops or offices, follow Subsection 3.7.4. and Section 3.8. (9.31.1.1.(2)OBC Div. B 9.31.1.1. Application(1) This Section applies to the plumbing facilities and plumbing systems within dwelling units. (2) In occupancies other than dwelling units, plumbing facilities, grab bars, floor drains, and floor and wall finishes around urinals shall conform to Subsection 3.7.4. (See also Section 3.8. regarding barrier-free…). See barrier-free accessibility in the Ontario Building Code.

Floor drains and electrical

A floor drain is required in a basement that forms part of a dwelling unit, where gravity drainage to a sewer, ditch or dry well is possible (9.31.4.3.OBC Div. B 9.31.4.3. Floor Drains(1) Where gravity drainage to a sewer, drainage ditch or dry well is possible, a floor drain shall be installed in a basement forming part of a dwelling unit.).

On the electrical side, the Building Code requires a lighting outlet with a fixture controlled by a wall switch in bathrooms and water-closet rooms (9.34.2.2.OBC Div. B 9.34.2.2. Outlets in Dwelling Units(1) Except as provided in Sentence (2), a lighting outlet with fixture controlled by a wall switch shall be provided in kitchens, bedrooms, living rooms, utility rooms, laundry rooms, dining rooms, bathrooms, water-closet rooms, vestibules and hallways in dwelling units. (2) Where a receptacle controlled by a wall…). Receptacles, GFCI protection and wiring are set by the Ontario Electrical Safety Code, which the Electrical Safety Authority administers.

Common mistakes

  1. Bath fan switched only by a humidity sensor with no manual switch in the room that overrides it.
  2. Exhaust outlet under a vented soffit or within 1,800 mm of an air intake.
  3. Tile stopping at the tub rim height for a tub with a shower head, instead of 1.2 m above the rim.
  4. No stud reinforcement in the main bathroom of a new house.
  5. Tank set to 60°C with a shower valve that has no high-limit stop at 49°C.
  6. A basement bathroom measured against the 2,100 mm above-grade rule instead of the basement space rule.

How to look it up yourself

In the 2024 Compendium, open Division B, Part 9. Search the code text for:

  • "Required Fixtures" (9.31.4.1.)
  • "Supplemental Exhaust" (9.32.3.7.)
  • "Bathroom, water closet room or laundry area above grade" (Table 9.5.3.1.)
  • "Waterproof finish shall be provided" (9.29.2.1.)
  • "Stud Wall Reinforcement" (9.5.2.4.)

For shower temperature, go to Part 7 and search "Water Temperature Control" (7.2.10.7.).

Plumbing facilities, ventilation and interior finishes are on the House exam syllabus. Read the free House exam study guide and try the free practice quiz on that page.

Based on the official 2024 Building Code Compendium on ontario.ca.

© King's Printer for Ontario, 2024. Reproduced with permission.

Sources

Free accountNo card needed

Start practising for your BCIN exam, free

  • A free practice quiz for each exam
  • Every answer cites its 2024 OBC article
  • Full 70 question timed simulations with a paid plan
  • Works on phone, tablet and computer
Create a free account

Frequently asked questions

What bathroom fixtures does the Ontario Building Code require in a house?
Where a water distribution system is available, every dwelling unit needs a kitchen sink, a lavatory, a bathtub or shower, and a water closet (Division B, Article 9.31.4.1.). A hot water supply is also required (Article 9.31.4.2.).
Does a bathroom need an exhaust fan in Ontario?
Where the principal ventilation fan does not have an exhaust intake in the bathroom, a supplemental exhaust fan of at least 25 L/s must be installed there, controlled by a manual switch in the bathroom (Division B, Sentences 9.32.3.7.(4) and (6)).
Does a bathroom need a window?
No, if electric lighting is provided (Division B, Table 9.7.2.3.). For non-heating-season ventilation, a bathroom ventilated by natural means needs 0.09 m² of unobstructed openable area (Table 9.32.2.2.); otherwise mechanical ventilation is used (Article 9.32.2.1.).
How hot can shower water be in Ontario?
Water discharging from a shower head or into a bathtub must not exceed 49°C, and showers and tubs are controlled by an automatic compensating valve (Division B, Article 7.2.10.7.). Valves for fixed shower heads must be pressure-balanced or thermostatic-mixing types (Article 7.2.10.7B.).
How high must tile go around a shower or tub?
Waterproof finish must reach at least 1.8 m above the floor in shower stalls, 1.2 m above the rim of a bathtub with a shower, and 400 mm above the rim of a bathtub without one (Division B, Article 9.29.2.1.).
Do houses need grab bars in the bathroom?
Grab bars are not required in a house, but where wood or steel studs enclose the main bathroom, the walls need reinforcement so grab bars can be added later (Division B, Article 9.5.2.4.). Any grab bar that is installed must resist 1.3 kN (Article 9.31.2.3.).