Town Hall Address 4052 Route 42 Monticello, NY 12701 United States- Sullivan County Website http://www.townofthompson.com/ County Clerk Daniel L. Briggs 845-807-0411 Monday - Friday 9:00 AM - 5:00 PM Government Center, 100 North Street Monticello, NY 12701 United States Town Clerk 845-794-2500 302 8:30 AM to 4:30 PM 4052 Route 42 Monticello, NY 12701 United States Tax Collector 845-794-2500 320 taxcollector@townofthompson.com M-F 9am-4pm, Lunch 1-2pm 4052 Route 42 P.O. Box 240 Monticello, NY 12701 United States Assessor 845-794-2500 324 assessor@townofthompson.com Mon -Fri 8:30 am – 4:30 pm 4052 Route 42 Monticello, NY 12701 United States Code Enforcement 845-794-2500 321 4052 Route 42 Monticello, NY 12701 United States Zoning 845-794-2500 321 assessor@townofthompson.com NY United States Fire District 845-794-5121 23 Richardson Ave Monticello, NY 12701 United States Water 845-794-5280 128 Rock Ridge Drive Monticello, NY 12701 United States Sewer 845-794-5280 128 Rock Ridge Drive Monticello, NY 12701 United States Town Hall Hours 8:30 AM to 4:30 PM County Sullivan