More than 120 properties have a year to retire their debt to the city.
Council made a decision earlier this week to see that properties owing three years or more in municipal tax arrears are on the block within 12 months, should payment again be ignored.
About 95 residential and 28 non-residential properties owe a combined $1.8 million.
Hilldale Gardens Retirement Living tops the list, with an outstanding payment of nearly $400,000.
The city says collection letters were sent to owners, outlining the consequences of non-payment.
