Under the Conservation Authorities Act, Toronto and Region Conservation Authority (TRCA) is responsible for the protection of lives and property from the effects of flooding and erosion within its jurisdiction.
TRCA is responsible for the enforcement of land use regulations to:
- Prevent construction in areas subject to flooding hazard
- Prevent the indiscriminate placing of fill in flood and erosion hazard areas
- Regulate the interference with and alteration of water courses
Generally, Ontario Regulation 41/24 and TRCA policy prohibit any filling or new construction within an area subject to flooding. (Minor or accessory structures such as tool sheds and car garages may be allowed). The regulation also applies to renovation or additions, such as the floodproofing of existing buildings.
Prior to any filling or construction in the floodplain, a permit must be obtained from TRCA.
Construction activity may also require municipal approvals under municipal by-laws or building codes, or from other government agencies.