CanadaCan the Crown claim ownership of land that was formerly under water?
Yes, the Crown generally retains ownership of land that was formerly under water — especially the beds and shores of navigable waters — unless legally conveyed to private parties.
What the Law Says
Canadian property law recognizes the Crown’s underlying title to lands, especially those beneath navigable waters. While no single federal statute universally defines this rule across all provinces, provincial legislation and foundational common law principles govern shoreline and submerged land ownership.
The principle stems from English common law inherited by Canada: the Crown holds radical title to all land, and ownership of the beds and shores of navigable waters is presumed to belong to the Crown unless expressly granted away.
This presumption applies regardless of whether the land is currently underwater or has been exposed due to natural or artificial changes (e.g., drainage, erosion, or lake level fluctuations).
Provincial statutes may modify or confirm this rule — for example, Ontario’s Beds of Navigable Waters Protection Act affirms Crown ownership of such beds unless lawfully alienated.
What Courts Have Said
The Supreme Court of Canada has affirmed the Crown’s enduring ownership of submerged and formerly submerged lands adjacent to navigable waters — even against long-standing private use.
The Court held that owners of lakeshore property on Lake Erie do not acquire title to land below the high water mark by virtue of adjacency or long use; the Crown retains ownership of the bed and shore of navigable waters, and adverse possession cannot be claimed against the Crown in such cases.
What to Do
Confirm whether the water body is legally ‘navigable’ — courts consider historical and practical use for transportation.
Check provincial land registry and Crown land records to determine if title was ever granted or reserved.
Consult a lawyer experienced in property or Aboriginal and Crown title matters, especially where Indigenous rights or treaties may affect ownership.
Do not assume ownership based on physical occupation or longstanding use — adverse possession does not apply against the Crown for beds of navigable waters.
Sources
Not legal advice. This article is general information based on publicly available sources, written for educational purposes. Laws change and individual situations vary. Consult a licensed attorney in your jurisdiction before acting on anything you read here. Last reviewed: 2026-06-08.