Does Itasca, IL need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Itasca in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Itasca in the 39th percentile nationally for seismic hazard - higher than 39% of the 4,875 US cities USGS was checked against here.

Itasca by the numbers

USGS's underlying values for Itasca: 0.063g peak ground acceleration, 0.123g at short period, 0.063g at 1 second. Within Illinois alone, Itasca ranks 186 of 330 cities by seismic hazard - the 44th percentile in-state. Itasca has a population of about 9,506.

What a retrofit costs in Itasca

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.

What this means for insurance

A Itasca 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 Itasca's figures come from

Itasca'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 Itasca.