Is a Toronto address in a flood plain, and whose map says so?
The Toronto and Region Conservation Authority's Regulated Area Search and Flood Plain Map Viewer. In Toronto there is no City zoning overlay for the flood plain.
Sources checked October 16, 2026
Conservation authorities in 2027
Toronto and Region authorityjoinsCentral Lake Ontario Regional Conservation Authority
On 1 February 2027 or a later date set by regulation, under the Conservation Authorities Act as amended in 2026.
- The recordFlood plain and regulated area
- Where to read itTRCA Regulated Area Search; TRCA Flood Risk Management and 2 more
- In the full reportWith the address's other records
What the record shows
Unlike Ottawa, Toronto's zoning by-law carries no flood plain overlay. The record for the city is kept by the Toronto and Region Conservation Authority: its Regulated Area Search takes an address or postal code and says whether the property falls inside the area regulated under Ontario Regulation 41/24, which covers land subject to flooding or erosion, wetlands, shorelines and watercourses; its Flood Plain Map Viewer shows the regulatory flood plain itself. The authority's own terms say that not every regulated area is mapped, that the boundary lines are conceptual, and that a feature need not be mapped to be regulated.
A regulated-area result governs permits for work near water, such as additions, decks and grading; it is not a forecast that a home will flood, and a home outside the mapped area can still take water through a basement. For written confirmation the authority offers a property inquiry service. Under the Conservation Authorities Act as amended in 2026, the Toronto and Region authority is to join the Central Lake Ontario Regional Conservation Authority on 1 February 2027 or a later date set by regulation.
Where to read it yourself
- TRCA Regulated Area Search: the address search for the conservation authority's regulated area
- TRCA Flood Risk Management: the authority's flood programs and mapping
- Bill 97, Plan to Protect Ontario Act (Budget Measures), 2026: Schedule 3 amends the Conservation Authorities Act; the transition date is 1 February 2027 or a later date set by regulation
- Regional conservation authority boundaries (ERO 025-1257): the Province's decision of 10 March 2026 on which authority joins which of the nine regional authorities
What OfferDue covers in Toronto
Conservation-authority regulated-area and flood plain checks are not currently included in our reports, so for a Toronto home the authority's own search is the place to look. The full report's water and flooding group does cover past floods seen by satellite, nearby creeks, rivers and ponds, and mapped wetlands for any Toronto address.
Public-record information, not legal, financial, insurance or inspection advice. Records change and can be incomplete, and this page describes the records, not any particular home. What we cover, city by city.