Town Hall Address 186 Main St Newmarket, NH 03857 United States- Rockingham County Website https://www.newmarketnh.gov/ Town Clerk (603) 659-3073 Ext. 1305 https://www.newmarketnh.gov/town-clerk-tax-collectors-office Monday, Tuesday, & Thursday: 7:00 am - 5:00 pm Wednesday: 7:00 am - 7:00 pm Friday: Closed 186 Main St Newmarket, NH 03857 United States Tax Collector (603) 659-3073 Ext. 1305 Monday, Tuesday, & Thursday: 7:00 am - 5:00 pm Wednesday: 7:00 am - 7:00 pm Friday: Closed 186 Main St Newmarket, NH 03857 United States Assessor (603) 659-3073 Ext. 1313 Monday and Thursday: 8:00 am to 4:00 pm 186 Main St Newmarket, NH 03857 United States Zoning (603) 659-8501 Ext. 1315 186 Main St Newmarket, NH 03857 United States Fire District (603) 659-3334 186 Main St Newmarket, NH 03857 United States Water (603) 659-3093 4 Young Lane Newmarket, NH 03857 United States Sewer (603) 659-3090 186 Main St Newmarket, NH 03857 United States Town Hall Hours Mon - Thu 7 A.M. - 4:15 P.M.; Fri 7 A.M. - 12:00 P.M. County Rockingham