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ARTICLE · 06 APRIL 2026

Better With Age: Purchasing A Property With A Legal Non-Conforming Use

Properties with legal non‑conforming ("grandfathered") uses often come with unique considerations, particularly when municipal zoning shifts.

CanadaReal Estate and Construction

Properties with legal non‑conforming (“grandfathered”) uses often come with unique considerations, particularly when municipal zoning shifts. 

Imagine someone just purchased a charming bed & breakfast (“B&B”) that has been in business for many years. They close the B&B for two weeks to complete renovations, such as changing the signage, and then, suddenly, the municipal Council amends the zoning by-law to prohibit all short‑term accommodation on the street. Does that mean they can’t reopen the B&B? Let’s discuss.

Establishing When a Property Has Legal Non-Conforming Use Status 

Subsection 34(9) of the Ontario Planning Act provides that provisions in a zoning by-law do not apply to the use of land, a building, or a structure that was lawfully commenced on the date the by-law was passed. Meaning, if the building was legally used as a B&B before the by-law amendment, then the property can continue to be used as a B&B. The use has become legally non-conforming, and there are

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