A house address, not a neighbourhood name, decides the catchment, and the two divisions typically redraw their maps every 2 to 3 years as new schools open in growing areas like Brighton and Aspen Ridge. That means a boundary a neighbour relied on a few years back is not guaranteed to still apply.
Because the maps differ between the public and Catholic systems, a family choosing between the two needs to check both before assuming a school assignment, since a house can sit inside one division's catchment for one school and a different one for the other.
Joel Dyck can point a buyer toward each division's own boundary tool for a specific address before an offer goes in. Get your hand-reviewed valuation from Joel Dyck.