Does Siler City, NC need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Siler City in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Rank it against the rest of the country and Siler City sits at the 42th percentile for seismic hazard among 4,875 US cities.

Where Siler City sits in North Carolina

USGS's underlying values for Siler City: 0.066g peak ground acceleration, 0.137g at short period, 0.066g at 1 second. Within North Carolina alone, Siler City ranks 96 of 147 cities by seismic hazard - the 35th percentile in-state. Siler City has a population of about 8,087.

Retrofit economics for Siler City

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 Siler City home

A Siler City 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 Siler City's figures come from

Siler City'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 Siler City.