Local Government OfficeBlack Diamond City Hall 3.0 (4)SaveAddress24301 Roberts Dr, Black Diamond, WA 98010Phone(360) 851-4500Websitehttps://www.blackdiamondwa.gov/ HoursMonday: 8:30 AM – 5:00 PMTuesday: 8:30 AM – 5:00 PMWednesday: 8:30 AM – 5:00 PMThursday: 8:30 AM – 5:00 PMFriday: 8:30 AM – 5:00 PMSaturday: ClosedSunday: Closed← Back home