Town Hall Address 650 Route 10 Gilsum, NH 03448 United States- Cheshire County Town Clerk (603) 357-0320 Tue 4 P.M. - 7 P.M.; Wed 8 A.M. - noon P.O. Box 36 Gilsum, NH 03448 United States Tax Collector (603) 357-0320 Tue 4 P.M. - 7 P.M.; Wed 8 A.M. - noon P.O. Box 36 Gilsum, NH 03448 United States Assessor (603) 357-0320 http://data.avitarassociates.com/ P.O. Box 67 Gilsum, NH 03448 United States Building (603) 357-0320 P.O. Box 67 Gilsum, 03448 United States Zoning (603) 357-0320 P.O. Box 89 Gilsum, NH 03448 United States Fire District (603) 352-7320 P.O. Box 1 Gilsum, NH 03448 United States Town Hall Hours Wed & Thu 8 A.M. - noon; Tue 4 P.M. -7 P.M. County Cheshire