The following excerpts should help to answer that question:
Definitions
1. (1) In this Act,
“building” means,
(a) a structure occupying an area greater than ten square metres consisting of a wall, roof and floor or any of them or a structural system serving the function thereof including all plumbing, works, fixtures and service systems appurtenant thereto,
(b) a structure occupying an area of ten square metres or less that contains plumbing, including the plumbing appurtenant thereto,
(c) plumbing not located in a structure,
(c.1) a sewage system, or
(d) structures designated in the building code; (“bâtiment”)
1.3.1.1. Designated Structures
(1) The following structures are designated for the purposes of clause (d) of the definition of building in subsection 1 (1)
of the Act:
(a) a retaining wall exceeding 1,000 mm in exposed height adjacent to,
(i) public property,
(ii) access to a building, or
(iii) private property to which the public is admitted,
(b) a pedestrian bridge appurtenant to a building,
(c) a crane runway,
(d) an exterior storage tank and its supporting structure that is not regulated by the Technical Standards and Safety Act,
2000,
(e) signs regulated by Section 3.15. of Division B that are not structurally supported by a building,
(f) a solar collector that is mounted on a building and has a face area equal to or greater than 5 m²,
(g) a structure that supports a wind turbine generator having a rated output of more than 3 kW,
(h) a dish antenna that is mounted on a building and has a face area equal to or greater than 5 m²,
(i) a communication tower exceeding 16.6 m above ground level,
(j) an outdoor pool that has a water depth greater than 3.5 m at any point,
(k) a public pool, and
(l) a public spa.
Definitions
1. (1) In this Act,
“building” means,
(a) a structure occupying an area greater than ten square metres consisting of a wall, roof and floor or any of them or a structural system serving the function thereof including all plumbing, works, fixtures and service systems appurtenant thereto,
(b) a structure occupying an area of ten square metres or less that contains plumbing, including the plumbing appurtenant thereto,
(c) plumbing not located in a structure,
(c.1) a sewage system, or
(d) structures designated in the building code; (“bâtiment”)
1.3.1.1. Designated Structures
(1) The following structures are designated for the purposes of clause (d) of the definition of building in subsection 1 (1)
of the Act:
(a) a retaining wall exceeding 1,000 mm in exposed height adjacent to,
(i) public property,
(ii) access to a building, or
(iii) private property to which the public is admitted,
(b) a pedestrian bridge appurtenant to a building,
(c) a crane runway,
(d) an exterior storage tank and its supporting structure that is not regulated by the Technical Standards and Safety Act,
2000,
(e) signs regulated by Section 3.15. of Division B that are not structurally supported by a building,
(f) a solar collector that is mounted on a building and has a face area equal to or greater than 5 m²,
(g) a structure that supports a wind turbine generator having a rated output of more than 3 kW,
(h) a dish antenna that is mounted on a building and has a face area equal to or greater than 5 m²,
(i) a communication tower exceeding 16.6 m above ground level,
(j) an outdoor pool that has a water depth greater than 3.5 m at any point,
(k) a public pool, and
(l) a public spa.
