Town Hall Address 29 West Avenue Essex, CT 06426 United States- Middlesex County Website http://www.essexct.gov Town Clerk 860-767-4340 Ext. 128 or 129 https://connecticut-townclerks-records.com/User/Login.aspx?ReturnURL=/index.aspx United States Assessor Ext. 123 or 124 https://essexct.mapgeo.io/?latlng=41.353289%2C-72.42108&zoom=13 United States Water 800-286-5700 United States Probate Court Saybrook (PD-33) Tax Adjustment Uniform Fiscal Year- July, January Indices General Index > real property > town taxes > water assessment Town Hall Hours Monday to Friday – 9:00 to 4:00 Water Source CT Water Company, Also well and septic Sewer Source No Sewer County Middlesex