Glendale Heights's Seismic Design Category, explained

Under the seismic model IBC and ASCE 7 use for new construction, Glendale Heights is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Glendale Heights ranks above 41% of the 4,875 cities in this dataset for seismic hazard - the 41th percentile.

Glendale Heights by the numbers

USGS's underlying values for Glendale Heights: 0.065g peak ground acceleration, 0.127g at short period, 0.064g at 1 second. Within Illinois alone, Glendale Heights ranks 137 of 330 cities by seismic hazard - the 59th percentile in-state. Glendale Heights has a population of about 32,866.

Retrofit economics for Glendale Heights

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 Glendale Heights 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 Glendale Heights's figures come from

Glendale Heights'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 Glendale Heights.