Does Greensboro, NC need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Greensboro 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 Greensboro sits at the 44th percentile for seismic hazard among 4,875 US cities.

Where Greensboro sits in North Carolina

The raw figures: peak ground acceleration 0.069g, short-period spectral response 0.142g, 1-second spectral response 0.066g. Among 147 North Carolina cities in this dataset, Greensboro ranks 91 for seismic hazard, the 38th percentile within the state. About 307,381 people live in Greensboro, North Carolina.

Bracing and bolting: the actual cost

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 Greensboro 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 Greensboro address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Greensboro'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.