Town Hall Address 127 Norwich Avenue Colchester, CT 06415 United States- New London County Website http://www.colchesterct.gov Town Clerk 860-537-7215 https://connecticut-townclerks-records.com/User/Login.aspx?ReturnURL=/index.aspx United States Tax Collector 860-537-7210 United States Assessor 860-537-7205 http://gis.vgsi.com/colchesterct/ United States Building 860-537-7285 United States Zoning 860-537-7280 United States Water 860-537-7289 United States Probate Court Windham-Colcehster (PD-28) Tax Adjustment Uniform Fiscal Year- July, January Indices General Index > real property > town taxes > sewer use > water use Town Hall Hours Monday to Friday – 8:30 to 4:30, Thursday until 7:00 PM Water Source Water and sewer in town, WPCA, Also well and septic Sewer Source WPCA in some towns County New London