Town Hall Address 16 School Street Allenstown, NH 03275 United States- Merrimack County Website https://www.allenstownnh.gov/ Town Clerk (603) 485-4276 Ext. 116 https://www.allenstownnh.gov/town-clerk-tax-collector Monday: 7:30 A.M. to 6:15 P.M. Tuesday - Thursday: 7:30 A.M. to 5:15 P.M. Friday: Closed 16 School Street Allenstown, NH 03275 United States Tax Collector (603) 485-4276 Ext. 116 Monday: 7:30 A.M. to 6:15 P.M. Tuesday - Thursday: 7:30 A.M. to 5:15 P.M. Friday: Closed 16 School Street Allenstown, NH 03275 United States Assessor (603) 485-4276 Ext. 114 http://data.avitarassociates.com/Logon.aspx Monday 8 A.M. to 4:30 P.M. 16 School Street Allenstown, NH 03275 United States Building (603) 485-9202 1 Ferry Street Allenstown, 03275 United States Zoning (603) 485-9202 16 School Street Allenstown, NH 03275 United States Fire District (603) 485-9202 1 Ferry St Allenstown, NH 03275 United States Sewer (603) 485-5600 35 Canal Street Allenstown, NH 03275 United States Town Hall Hours M 8-7, Tue & Wed 8-5, Thur 8-7 Water Source Well & Septic Sewer Source Allenstown Sewer Dept. County Merrimack