City Finance Director Elizabeth Hannan said their addition adds nearly $14 million to the city's assessed value, meaning the tentative tax rate set by the county clerk's office was too high. OSF does not agree that its properties are not exempt. URBANA — The city of Urbana's 2018 municipal property-tax rate was tentatively set too high because OSF Heart of Mary Medical Center properties were taxable for that year, local officials said. read more