Frost line depth in Southeastern Connecticut Planning Region, CT

How deep the ground freezes in Southeastern Connecticut Planning Region, CT

21 in. Dig to 21 in, just below the frost. Nearest NOAA station: Norwich Public Utility Plt, 3.5 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.

Code depth · Snow