Hendersonville's Seismic Design Category, explained

Under the seismic model IBC and ASCE 7 use for new construction, Hendersonville is 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, Hendersonville ranks above 79% of the 4,875 cities in this dataset for seismic hazard - the 79th percentile.

How Hendersonville compares

USGS's underlying values for Hendersonville: 0.128g peak ground acceleration, 0.263g at short period, 0.135g at 1 second. Within Tennessee alone, Hendersonville ranks 57 of 104 cities by seismic hazard - the 46th percentile in-state. Hendersonville has a population of about 63,947.

Retrofit economics for Hendersonville

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 Tennessee 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 Tennessee.

What this means for insurance

A Hendersonville 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 Hendersonville's figures come from

Hendersonville'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 Hendersonville.