Frost Depth & Snow Load in Massachusetts (2026)

4 rules on the books across Massachusetts. 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.

Massachusetts sets one frost line depth for the whole state: 48 inches. Footings must bear below that depth anywhere in…

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

Massachusetts publishes a ground snow load for every one of its 351 cities and towns in a single state table, ranging…

The minimum roof or flat-roof design snow load (Pf), a different quantity from ground snow load, where the jurisdiction adopts its own figure.

Massachusetts lists a minimum flat roof snow load for every city and town, and requires designers to use whichever is…

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

Beyond frost depth and snow load, the Massachusetts design criteria table sets weathering, termite risk, ice barrier…