Dorothy Tillman was appointed by Mayor Harold Washington and later elected as an alderman representing the city's third ward in February 1985, being the first woman elected for that ward. Tillman pioneered the first TIF to be used in the black community, with the construction of the 55th and Dan Ryan shopping center. She helped to found the African American Home Builders Association and advocated for a 70/30 plan to make certain that African Americans received the majority of the contracts.