CREB chief economist Ann-Marie Lurie attributed May's slowdown to "more supply choice in the new home and rental markets" together with rising cost of living and slower migration. That attribution does the heavy lifting because it points at three structural pressures, not one cyclical one.
The supply side is the most important piece. The City of Calgary's Q2 2025 Housing Review reported housing starts up 55.6% year-over-year, with apartment construction nearly doubling to 4,481 units in a single quarter. About 71% of those apartment starts — 3,480 units — were purpose-built rentals. By the same quarter, more than 23,000 dwellings were under construction citywide, almost half of them destined for the rental market.
That is the supply story Lurie is pointing to. It is also why the apartment segment is correcting first. Purpose-built rentals are direct substitutes for would-be condo buyers and would-be condo investors. When the rental pipeline gets that fat, the condo market loses its captive renter pool — and the resale benchmark adjusts.
Inventory numbers from May reinforce the picture. New listings were 4,226, down 12.7% year-over-year. Total inventory was 6,752, essentially flat. Fewer new sellers and flat overall stock would normally signal a tight market. Pair that with a 15.5% drop in sales, and the math points the other way: demand has weakened faster than supply has reset. Months of supply rise; buyer leverage rises with them. That is classic demand-side softening, and it shows up in benchmark prices before it shows up in headline inventory.
A useful comparable: in April, WOWA's tracking of CREB data already showed Calgary's apartment segment at 4.4 months of supply — well into buyer's market territory — while detached homes were still classed as a seller's market. May's print is a continuation of that divergence, not a sudden break.