Evergreen Park's Seismic Design Category, explained

Under the seismic model IBC and ASCE 7 use for new construction, Evergreen Park is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Evergreen Park ranks above 39% of the 4,875 cities in this dataset for seismic hazard - the 39th percentile.

Where Evergreen Park sits in Illinois

The raw figures: peak ground acceleration 0.062g, short-period spectral response 0.123g, 1-second spectral response 0.065g. Among 330 Illinois cities in this dataset, Evergreen Park ranks 202 for seismic hazard, the 39th percentile within the state. About 19,301 people live in Evergreen Park, Illinois.

What a retrofit costs in Evergreen Park

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Illinois. A typical retrofit still runs $5,000-$10,000 nationally, about $7,000 for a common single-family job.

Earthquake insurance for a Evergreen Park home

Outside California, earthquake coverage is typically sold as an endorsement added to a standard homeowners policy, not a separate product - worth asking about directly when getting a home-insurance quote for a Evergreen Park address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Evergreen Park's numbers. The guide to what a Seismic Design Category actually means covers why a category is never a substitute for an engineer's assessment of one specific house.