Louisville's Seismic Design Category, explained

Louisville carries Seismic Design Category B under USGS's ASCE 7-16 model. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Louisville in the 60th percentile nationally for seismic hazard - higher than 60% of the 4,875 US cities USGS was checked against here.

Where Louisville sits in Colorado

USGS's underlying values for Louisville: 0.122g peak ground acceleration, 0.221g at short period, 0.06g at 1 second. Within Colorado alone, Louisville ranks 29 of 79 cities by seismic hazard - the 64th percentile in-state. Louisville has a population of about 20,811.

What a retrofit costs in Louisville

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 Colorado 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 Colorado.

What this means for insurance

A Louisville 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 Louisville's figures come from

Louisville'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 Louisville.