Does New Lenox, IL need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, New Lenox is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, New Lenox ranks above 44% of the 4,875 cities in this dataset for seismic hazard - the 44th percentile.

How New Lenox compares

USGS's underlying values for New Lenox: 0.068g peak ground acceleration, 0.134g at short period, 0.069g at 1 second. Within Illinois alone, New Lenox ranks 107 of 330 cities by seismic hazard - the 68th percentile in-state. New Lenox has a population of about 28,480.

What a retrofit costs in New Lenox

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 New Lenox 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 New Lenox's figures come from

New Lenox'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 New Lenox.