Bel Air's Seismic Design Category, explained

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Bel Air in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Bel Air in the 53th percentile nationally for seismic hazard - higher than 53% of the 4,875 US cities USGS was checked against here.

Bel Air by the numbers

The raw figures: peak ground acceleration 0.088g, short-period spectral response 0.161g, 1-second spectral response 0.045g. Among 46 Maryland cities in this dataset, Bel Air ranks 4 for seismic hazard, the 93th percentile within the state. About 10,395 people live in Bel Air, Maryland.

What a retrofit costs in Bel Air

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

What this means for insurance

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 Bel Air address.

More on how this number was built

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