DIVISION C · PART 3 — ADMINISTRATIVE PROVISIONSUpdated for the 2024 Ontario Building Code
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3.5.2.1.Inspectors and Persons Who Carry out Design Activities
(1) Table 3.5.2.1. sets out the classes of registration and categories of qualifications for inspectors and persons who
carry out design activities.
Table 3.5.2.1.
Classes of Registration and Categories of Qualifications for Inspectors and Persons Who Carry Out Design Activities (1)(2)
Forming Part of Sentence 3.5.2.1.(1)
Classes of Registration Categories of Qualifications
for Inspectors and Persons for Inspectors and Persons
Item Type of Building
Who Carry out Design Described in Clauses 3.2.4.2.(1)(a)
Activities and (b) and 3.2.5.2.(1)(a)
(a) A house and the building systems, works, fixtures and service
systems appurtenant to the house,
including:
House House (b) an ancillary building that serves the house, and
1 excluding:
(c) buildings and parts of buildings described in Column 3 of any of
Items 5, 6, 7, 8, 10 and 11 of this Table.
(a) Buildings described in Sentence 1.3.3.3.(1) of Division A and the
building systems, works, fixtures and service systems
appurtenant to these buildings,
including:
(b) buildings and parts of buildings,
(i) described in Column 3 of Item 1 of this Table, or
2 Small Buildings Small Buildings (ii) to which any of Sections 3.10., 3.11., 3.12., 3.14. and
3.15. of Division B apply and that are appurtenant to or
serve buildings described in Clause (a),
excluding:
(c) buildings and parts of buildings described in Column 3 of any of
Items 4 to 10 of this Table, and
(d) signs described in Clause 1.3.3.5.(1)(e) of Division A.
(a) Buildings described in Sentence 1.3.3.2.(1), (3) or (4) of Division
A and the building systems, works, fixtures and service systems
appurtenant to these buildings,
3 Large Buildings Large Buildings excluding:
(b) buildings and parts of buildings described in Column 3 of any of
Items 4 to 11 of this Table, and
(c) signs described in Clause 1.3.3.5.(1)(e) of Division A.
Building systems, works, fixtures and service systems to which
4 Complex Buildings Complex Buildings Subsection 3.2.6. of Division B or any provision in Articles 3.2.8.3. to
3.2.8.8. of Division B applies.
All plumbing systems to which Part 7 of Division B applies that are
5 Plumbing – House Plumbing – House
appurtenant to a house.
(a) All plumbing systems to which Part 7 of Division B applies,
including:
6 Plumbing – All Buildings Plumbing – All Buildings
(b) buildings and parts of buildings described in Column 3 of Item 5
of this Table.
All building systems, works, fixtures and service systems to which
7 HVAC – House HVAC – House Section 9.32. or 9.33. of Division B applies that are appurtenant to a
house.
Column 1 2 3
Table 3.5.2.1. (Cont’d)
Classes of Registration and Categories of Qualifications for Inspectors and Persons Who Carry Out Design Activities (1)(2)
Forming Part of Sentence 3.5.2.1.(1)
Classes of Registration Categories of Qualifications
for Inspectors and Persons for Inspectors and Persons
Item Type of Building
Who Carry out Design Described in Clauses 3.2.4.2.(1)(a)
Activities and (b) and 3.2.5.2.(1)(a)
(a) Building systems, works, fixtures and service systems that are
appurtenant to buildings described in Sentence 1.3.3.2.(1), (3)
or (4) or Sentence 1.3.3.3.(1) of Division A and that relate to
fire suppression, fire detection, smoke control, exhaust, vertical
movement of smoke, energy efficiency, lighting and emergency
power, and
8 Building Services Building Services (b) building systems, works, fixtures and service systems
appurtenant to buildings to which Part 6 of Division B applies
or to which Section 9.32. or 9.33. of Division B applies,
including:
(c) buildings and parts of buildings described in Column 3 of Item
7 or 11 of this Table.
Internal and external loadbearing structural elements essential to the
stability or strength of a building described in Sentence 1.3.3.2.(2) or
9 Building Structural Building Structural 1.3.3.3.(1) of Division A and that resist dead loads or live loads
including, but not limited to, foundations, floors, walls, roofs, columns
and beams.
10 On-Site Sewage Systems On-Site Sewage Systems Sewage systems to which Part 8 of Division B applies.
Early warning and electrical systems including systems appurtenant
to buildings described in Sentence 1.3.3.2.(1) or 1.3.3.3.(1) of
Detection, Lighting and Division A and that relate to fire alarm and detection systems, voice
11 Detection, Lighting and Power
Power communication systems, lighting systems, emergency lighting
systems or emergency power systems for building services in all
buildings.
Fire suppression, fire detection, firefighting and fire safety systems
12 Fire Protection Fire Protection appurtenant to buildings described in Sentence 1.3.3.2.(1) or
1.3.3.3.(1) of Division A.
Column 1 2 3
Notes to Table 3.5.2.1.:
(1) An inspector registered in one class of registration may carry out plans review and inspection in another class where to do so does
not constitute a substantial part of the plans review or inspection on any project.
(2) A person registered in one class of registration may carry out design activities in another class where to do so does not constitute a
substantial part of the design activities on any project.
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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.