Does Greenville, WI need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Greenville is Category A. Lowest seismic design category. Building code requires no seismic-specific detailing here beyond ordinary construction practice. Nationally, Greenville ranks above 8% of the 4,875 cities in this dataset for seismic hazard - the 8th percentile.

Greenville by the numbers

The raw figures: peak ground acceleration 0.025g, short-period spectral response 0.053g, 1-second spectral response 0.037g. Among 157 Wisconsin cities in this dataset, Greenville ranks 115 for seismic hazard, the 27th percentile within the state. About 13,273 people live in Greenville, Wisconsin.

Bracing and bolting: the actual cost

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

Earthquake insurance for a Greenville 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 Greenville address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Greenville'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.