How school catchments work in Ontario

A school catchment — the board term is attendance boundary — is the area of homes zoned for a specific public school. Ontario families routinely shortlist homes by school first, but boundaries are set by school boards, not by neighbourhood names, and the two often disagree. This guide explains how boundaries are drawn, why they change, and how to verify the catchment for any address before an offer.

Who sets catchments

Every Ontario address is served by up to four publicly funded systems — English public, English Catholic, French public and French Catholic — and each board draws its own attendance boundaries for its schools. In Halton, for example, the Halton District School Board publishes its boundaries through its Planning department’s boundary maps and the Halton Catholic District School Board through its School Planning boundary maps. The board’s own tool is always the authoritative source; DistrictIQ’s maps are built from these published boundaries.

Why boundaries change

Boundaries are not permanent. Boards run boundary reviews (also called accommodation reviews) when a school approaches capacity, a new school opens, or a new subdivision adds students faster than nearby schools can absorb — and the outcome can rezone streets from one school to another. Fast-growing areas are reviewed most often, and boards may also place new developments in temporary holding zones until a permanent school is ready. If a listing’s value case leans heavily on one school, check whether that school is part of an active review on the board’s planning pages before waiving conditions.

Catchment ≠ neighbourhood — and other traps

• Boundaries cross neighbourhoods. A community can be split between two elementary catchments, and a “named-after-the-neighbourhood” school doesn’t always serve the whole neighbourhood.
• Program tracks differ. French Immersion boundaries are frequently different from regular-track boundaries for the same address.
• Zoned is not guaranteed. Over-capacity schools can redirect new students even inside the boundary — enrolment questions belong to the board, not the listing agent.
• Elementary and secondary boundaries are independent. An address’s elementary school implies nothing about its secondary school.

Check any address before you buy

DistrictIQ maps 2,017 school catchments across 27 Ontario cities, from the boards’ published boundaries — with the homes for sale inside each one and EQAO context for the school.