Close to 25,000 housing units stand vacant in Montreal right now, a number arrived at through Hydro‑Quebec’s records. With an interesting tool for checking how many vacancies are in your postal area. Adding later: Projet is proposing a tax on vacant buildings. It goes on puzzling me, as it did when I worked on the 2021 census and found many addresses empty. In a few, I could see that renovations had begun at some time in the past but had been ab…