Does Rockingham, NC need an earthquake retrofit?

Rockingham carries Seismic Design Category C under USGS's ASCE 7-16 model. Moderate seismic hazard. Code adds irregular-building restrictions and requires bracing of some nonstructural components (e.g. tall shelving, water heaters) in addition to structural detailing. Rank it against the rest of the country and Rockingham sits at the 70th percentile for seismic hazard among 4,875 US cities.

Rockingham by the numbers

USGS's underlying values for Rockingham: 0.105g peak ground acceleration, 0.204g at short period, 0.084g at 1 second. Within North Carolina alone, Rockingham ranks 30 of 147 cities by seismic hazard - the 80th percentile in-state. Rockingham has a population of about 8,802.

What a retrofit costs in Rockingham

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 North Carolina 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 North Carolina.

Earthquake insurance for a Rockingham home

A Rockingham 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 Rockingham's figures come from

Rockingham's Category C 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 C does and doesn't tell you about Rockingham.