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Information for Residential

Through its Planning and Development Division, Toronto and Region Conservation Authority (TRCA) regulates development in valley and stream corridors, wetlands, and along the Lake Ontario shoreline, and reviews and comments on development proposals and planning applications within or near these natural areas.

By doing so, Toronto and Region Conservation Authority aims to prevent, eliminate, or reduce the risk to life and property from flooding, erosion and slope instability, and to encourage the protection and enhancement of natural systems. Toronto and Region Conservation Authority also makes technical data available where appropriate.

Our goals are to:

  • Ensure your development is not at risk from flooding or erosion hazards.
  • Protect and regenerate the ecological health and sustainability of natural systems.
  • Provide opportunities for public use and enjoyment of natural systems.
  • Support provincial and municipal environmental policies.

Areas of interest include:

  • Features and hazards regulated under Ontario Regulation 166/06
  • Terrestrial Natural Heritage Systems, which may include Areas of Natural and Scientific Interest or Environmentally Significant Areas
  • Fish habitat on behalf of Fisheries and Oceans Canada (DFO)
  • TRCA properties

Applicable legislation:

  • Conservation Authorities Act
  • Planning Act
  • Environmental Assessment Act
  • Clean Water Act
  • Fisheries Act
  • Greenbelt Act
  • Niagara Escarpment Planning and Development Act
  • Oak Ridges Moraine Conservation Act
  • Municipal legislation (e.g., tree and ravine by-laws)
  • Other applicable legislation

Planning Applications

The Planning Act is the primary piece of legislation governing land use planning and development in Ontario. It sets out the means by which a municipality must implement land use planning decisions. Toronto and Region Conservation Authority is a commenting agency under the Planning Act, enabling us to provide input to our partner municipalities on planning matters.

Toronto and Region Conservation Authority provides technical and scientific expertise for the following planning applications:

  • Official Plan amendments
  • Zoning by-law amendments
  • Plans of subdivision
  • Site plans
  • Consents/severances
  • Minor variances

Planning Application process

TRCA Permit Applications

Toronto and Region Conservation Authority is empowered by Section 28 of the Conservation Authorities Act to administer Ontario Regulation 166/06, a natural hazard-based regulation.

Areas affected:

  • Watercourses
  • River or stream valley systems
  • Lake Ontario shoreline
  • Wetlands
  • Areas of Interference around wetlands

Regulated activities:

  • Development
    • Construction and reconstruction
    • Change of use to a building
    • Site grading
    • Temporary or permanent fill placement
  • Interference and alterations to wetlands
  • Interference and alterations to shorelines
  • Interference and alterations to watercourses

Permit Application process