Does Stratford, NJ need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Stratford is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Stratford in the 54th percentile nationally for seismic hazard - higher than 54% of the 4,875 US cities USGS was checked against here.

Stratford by the numbers

The raw figures: peak ground acceleration 0.094g, short-period spectral response 0.171g, 1-second spectral response 0.046g. Among 194 New Jersey cities in this dataset, Stratford ranks 171 for seismic hazard, the 12th percentile within the state. About 7,185 people live in Stratford, New Jersey.

What a retrofit costs in Stratford

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for New Jersey. 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 Stratford address.

More on how this number was built

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