Town Hall Address 45 Fort Hill Road Groton, CT 06340 United States- New London County Website http://www.groton-ct.gov Town Clerk 860-441-6640 https://connecticut-townclerks-records.com/User/Login.aspx?ReturnURL=/index.aspx United States Tax Collector 860-441-6670 United States Assessor 860-441-6660 http://maps.groton-ct.gov/apps/grotongislite/ United States Building 860-446-5982 United States Zoning 860-446-5989 United States Water 860-572-1123 United States Probate Court Southern CT Regional (PD-30) Tax Adjustment Uniform Fiscal Year- July, January Indices General Index > real property > town taxes > sewer assessment > sewer use > Noank water assessment and use > Groton sewer district > fire district taxes Town Hall Hours Monday to Friday – 8:30 to 4:30, Thursday – 9:00 to 4:30 Fire District Center – Groton Fire District , City of Groton , Groton Long Point , Mumford Court Association , Mystic , Noank , Old Mystic , Poquonock Bridge , West Pleasant Valley - Telephone numbers through Tax Collector Water Source Groton City Utilities, Groton Long Point Water, Noank Sewer Source Tax Collector County New London