Frost line depth in Haywood County, NC
How deep the ground freezes in Haywood County, NC
16 in. Dig to 17 in, just below the frost. Nearest NOAA station: Waynesville 1 E, 5 mi.
Your building department sets the legal frost line depth (IRC Table R301.2(1)); footings must go below it (R403.1.4.1). Call them before you dig.