Bill 128: Hot Days, Cool Homes Act, 2026

This bill directly affects residential landlords in Ontario — whether you own a single rental unit, a small apartment building, or a larger multi-residential property. Starting January 1, 2035, you'll need to ensure your rental units can be cooled to a maximum of 26°C during summer months, which may require installing or upgrading air conditioning systems. If a tenant already has control over their own cooling and simply chooses not to use it, you're off the hook — but if the unit lacks adequate cooling equipment, that's on you. Smaller landlords with older housing stock are likely to feel this most, as retrofitting buildings with cooling systems can be a significant capital expense.