Floor Treasurer - Room 106 Buildings Department - Room 900 Department of Finance - 7th Floor Department of Law - Suite 600 Business Affairs and Consumer Protection - 8th Floor Department of Planning and Development - 10th Floor Department of Streets and Sanitation - Room 1107 Office of Emergency Management and Communications Department of Procurement Services - Room 806 Department Human Resources References External links Chicago Landmarks: City Hall-County Building Cook County ASLA Merit Award 2002: Chicago City Hall Green Roof City and town halls in Illinois City Hall Central Chicago City Hall Government buildings completed in 1911 City Hall 1911 establishments in Illinois Projects by Holabird & Root Chicago Landmarks