Town Hall Address 253 Main Street Ansonia, CT 06401 United States- New Haven County Website http://www.cityofansonia.com/ Town Clerk (203) 736-5980 https://connecticut-townclerks-records.com/User/Login.aspx?ReturnURL=/index.aspx United States Tax Collector (203) 736-5910 United States Assessor (203) 736-5950 United States Building (203) 736-5990 United States Zoning (203) 736-5990 United States Water (203) 410-2515 90 Sergent Drive New Haven, CT 06511 United States Sewer (203) 736-5908 United States Probate Court Derby (PD-41) Tax Adjustment Uniform Fiscal Year- July, January Indices General Index > real property, town taxes, sewer assessment, sewer use Town Hall Hours M - W 8:30 - 4:30, Th 8:30- 5:00, F 8:30-1:00. Water Source Regional Water Authority Sewer Source WPC County New Haven