Does Henderson, NV need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Henderson in Seismic Design Category D: High seismic hazard - this is the category most of coastal California, the Pacific Northwest, and other active fault regions fall into. Code mandates significant seismic detailing and restricts irregular structural configurations. This is the category the Brace + Bolt scope (cripple-wall bracing, foundation bolting) is built for. Nationally, Henderson ranks above 82% of the 4,875 cities in this dataset for seismic hazard - the 82th percentile.

Where Henderson sits in Nevada

USGS's underlying values for Henderson: 0.21g peak ground acceleration, 0.472g at short period, 0.162g at 1 second. Within Nevada alone, Henderson ranks 11 of 12 cities by seismic hazard - the 9th percentile in-state. Henderson has a population of about 350,039.

Retrofit economics for Henderson

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 Nevada 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 Nevada.

Earthquake insurance for a Henderson home

A Henderson 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 Henderson's figures come from

Henderson's Category D 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 D does and doesn't tell you about Henderson.