Justice's Seismic Design Category, explained

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Justice in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Rank it against the rest of the country and Justice sits at the 40th percentile for seismic hazard among 4,875 US cities.

Justice by the numbers

USGS's underlying values for Justice: 0.064g peak ground acceleration, 0.126g at short period, 0.065g at 1 second. Within Illinois alone, Justice ranks 161 of 330 cities by seismic hazard - the 51th percentile in-state. Justice has a population of about 12,267.

Bracing and bolting: the actual cost

A full earthquake retrofit typically runs $5,000-$10,000 nationally (around $7,000 typical), driven mainly by house size and foundation type, not by Illinois specifically. California's Earthquake Brace + Bolt grant, which covers a large share of this cost, is a California-only program and does not apply in Illinois.

Insuring against this, not just retrofitting

A Justice homeowner cannot buy a standalone earthquake policy in most cases - it is added to an existing homeowners policy as an endorsement, so the place to start is a regular home-insurance quote.

Where Justice's figures come from

Justice's Category B and every number above trace to USGS's own ASCE 7-16 Design Maps service - see the methodology guide. See the category explainer for what Category B does and doesn't tell you about Justice.