$200.75 per 291 m² billing unit of impervious surface, annual. The City publishes per-parcel billing as open data — every charge on this map is sourced directly, not estimated.

Up to 50% standard reduction with documented on-site stormwater controls. Up to 90% for properties with direct Lake Ontario discharge + green-space land use — the highest credit rate in any Ontario city.

Industrial, commercial, institutional, and multi-residential parcels. Single-family residential pays a flat fee and isn't credit-eligible.

Our RGB-only ortho was misclassifying farmland as impervious. We've hidden the toggle; the popup's Impervious field is derived from the City's billing-units data, which is authoritative.

A darker border around a parcel means a Stormwater Management report is on file — click for the structured analysis (consultant, qualifying credit categories, source PDF).