Frost line depth in Falls Church city, VA

How deep the ground freezes in Falls Church city, VA

16 in. Dig to 16 in, just below the frost. Nearest NOAA station: Dalecarlia Rsvr, 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