Frost Depth & Snow Load in Connecticut (2026)

3 rules on the books across Connecticut. Select a rule to read the full details.

Severity: Few Restrictions · Light Restrictions · Some Restrictions · Significant Restrictions · Heavy Restrictions

Frost Line Depth

How deep footings must go below finished grade to sit under the frost line, as adopted locally in IRC Table R301.2 or an amendment to R403.1.4.

Connecticut sets a single frost line depth of 42 inches for the whole state, written into the state building code…

The ground snow load in pounds per square foot (Pg) the jurisdiction adopted, which sets what roofs and structures must be designed to carry.

Connecticut lists a ground snow load for each of its 169 towns in Appendix AY of the state building code, ranging from…

The full set of local design criteria, wind speed, seismic design category, weathering, termite risk and ice-barrier requirements, as adopted.

Connecticut fixes almost the entire residential design criteria table statewide: seismic category B, weathering Severe…