Revitalization of brownfield sites has been one of the major planning issues in developed countries. Federal and state's governments developed institutional systems, grants and other public assistance to promote reuse of brownfield in the United States. This paper examines a 20-years brownfields revitalization process of Lowell, Massachusetts utilizing these assistances. In citywide scale, the city inventoried brownfield sites in the city and decided priority areas in the fringe of downtown to concentrate its resources and the public assistance. In each priority area, improvement of public spaces and a public funded leading project was a key of spatial planning to create a momentum to attract private investments towards brownfield sites in the area.