Please be advised the Town of Champlain Assessor's Office at the Town Hall, 729 Rte 9, is staffed every Thursday from 9:00am-3:30pm for exemption renewals and assessment questions. The phone number is 518-298-8160. The email address is firstname.lastname@example.org. Return all exemptions to: Clinton County Real Property Office, 137 Margaret Street, Government Center Suite 210, Plattsburgh, NY 12901. The phone number is 518-565-4762.