Part 10.3 Room heights

(1) Heights of rooms and other spaces (see Figure 10.3.1) must be not less than—

1. in a habitable room excluding a kitchen — 2.4 m; and
2. in a kitchen — 2.1 m; and
3. in a corridor, passageway or the like — 2.1 m; and
4. in a bathroom, shower room, laundry, sanitary compartment, airlock, pantry, storeroom, garage, car parking area or the like — 2.1 m; and
5. in a room or space with a sloping ceiling or projections below the ceiling line within—
   1. a habitable room—
      1. in an attic — a height of not less than 2.2 m for at least two-thirds of the floor area of the room or space; and
      2. in other rooms — a height of not less than 2.4 m over two-thirds of the floor area of the room or space; and
   2. a non-habitable room — a height of not less than 2.1 m for at least two-thirds of the floor area of the room or space; and
6. in a stairway, ramp, landing, or the like — 2.0 m measured vertically above the nosing line of stairway treads or the floor surface of a ramp, landing or the like.

(2) For the purposes of (1)(e), when calculating the floor area of a room or space, any part that has a ceiling height of less than 1.5 m is not included.