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Spatial separation between houses

Part 9 · Housing and small buildings · Div. B 9.10.15HouseAbout 20 min

For houses and houses with a secondary suite: glazed openings by limiting distance, and when the exposing wall needs a fire-resistance rating and noncombustible cladding.

Study notes, not an official interpretation. About these notes

Only the Minister’s binding interpretations (Act s.28.1) and the decisions of the chief building official on a real project are authoritative.

Quoted from the 2024 Building Code, O. Reg. 163/24 as amended by O. Reg. 5/25 (Building Code Compendium, January 16, 2025 update). Later amendments are not yet reflected. This copy is for study; check the current official Code.

Each provision is quoted word for word. Study summaries, background, examples, exam traps and recall answers are ours: shorthand for memory and made-up scenarios for study, not a substitute for the text. On a real project, the chief building official decides how the Code applies.

Confirm against the official text of the Act and the Code before relying on anything.

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