Does Carolina Shores, NC need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Carolina Shores in Seismic Design Category C: 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. Nationally, Carolina Shores ranks above 72% of the 4,875 cities in this dataset for seismic hazard - the 72th percentile.

Where Carolina Shores sits in North Carolina

The raw figures: peak ground acceleration 0.122g, short-period spectral response 0.235g, 1-second spectral response 0.092g. Among 147 North Carolina cities in this dataset, Carolina Shores ranks 12 for seismic hazard, the 92th percentile within the state. About 5,463 people live in Carolina Shores, North Carolina.

What a retrofit costs in Carolina Shores

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for North Carolina. A typical retrofit still runs $5,000-$10,000 nationally, about $7,000 for a common single-family job.

Earthquake insurance for a Carolina Shores home

Outside California, earthquake coverage is typically sold as an endorsement added to a standard homeowners policy, not a separate product - worth asking about directly when getting a home-insurance quote for a Carolina Shores address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Carolina Shores's numbers. The guide to what a Seismic Design Category actually means covers why a category is never a substitute for an engineer's assessment of one specific house.