2024 Ontario Building Code in effect (harmonized with NBC 2020)
In force since Jan 1, 2025
What it means for you: Permits applied for from April 1, 2025 must show compliance with the 2024 code.
New Construction Laws
New and upcoming construction laws, building codes and regulations across Canada, and what each change means for owners, buyers, contractors, trades, workers, suppliers and designers. Every entry links to the official source.
32 changes
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Showing changes that affect people and companies who own the property and commission the work, including homeowners renovating, with what each one means for you.
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14 changes for owners & developers · page 2 of 2
In force
These already apply.
Underused Housing Tax ended from the 2025 calendar year
In force since Jan 1, 2025
What it means for you: No UHT return or tax for 2025 onward, but any unfiled 2022–2024 returns and penalties are still owed.
Affects Owner Contractor
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Plain-language summaries by ArtBuild, checked against the official source on the date shown on each page. This is general information, not legal advice, and you are responsible for how you use it. Laws change: always read the official text, and we recommend asking a lawyer or the regulator about your situation.