Chicago’s public housing has undergone drastic changes in the past two decades. With a sweeping urban policy implemented in 2000, its grim, isolated towers were razed and replaced by a new model: tidy rows of townhouses and smaller apartment complexes that mix tenants of varied income levels. The North Side neighborhood where the troubled former Cabrini-Green apartment towers stood—once home to 15,000 public housing residents—has undergone a particularly radical transformation.