The Lake Simcoe Region Conservation Authority

Riverine Flood Status
Lake Simcoe Shoreline Status
Low Water Status

Regulation Maps

In accordance with the Conservation Authorities Act and Ontario Regulation 41/24, Lake Simcoe Region Conservation Authority regulates areas where development could be subject to flooding, erosion, unstable soils or bedrock, and where interference with wetlands and alterations to shorelines and watercourses might adversely affect those features. Any development within the Regulated Area may require a permit from the Lake Simcoe Region Conservation Authority.

We have updated our mapping as part of Provincial-led consultation on the updated changes to the Conservation Authorities Act and Ontario Regulation 41/24. You can view these changes online here (

The main update is the reduction in the regulated area around all wetlands. Additionally, the Lake Simcoe Region Conservation Authority retained Baird & Associates company in December, 2021 to undertake a review and update of our Shoreline Hazard limits. Advances in technology have allowed a more accurate depiction of the shoreline flooding and erosion hazards. The completion of this study coincides with the updated Act and release of Ontario Regulation 41/24 and is being consulted on as part of our overall Regulation limit update. The final report can be found here.

You can use the search tool below to determine if your property is within a regulated area and to view the current vs. the updated regulation limits. Inquiries and/or comments can be sent to

Note that in the event of a conflict between the mapping and the regulated features that the description of the areas where the development activity is prohibited prevails. The Lake Simcoe Region Conservation Authority uses the ‘best available information’ for decision making.

Regulation Area Property Search

Search for properties using our Interactive Regulation Mapviewer.

Office Hours

Important Notice:

Our public office hours will be Tuesdays, Wednesdays and Thursdays from 8:30 am to 4:30 pm.
We highly recommend making an appointment in advance to ensure there is staff available to help you. 

phone icon   Who to Contact 

Permits & Regulations
1-800-465-0437 Toll free

Submit electronic applications to​

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