Stamford, CT: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Stamford is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Stamford in the 62th percentile nationally for seismic hazard - higher than 62% of the 4,875 US cities USGS was checked against here.

Where Stamford sits in Connecticut

The raw figures: peak ground acceleration 0.158g, short-period spectral response 0.262g, 1-second spectral response 0.058g. Among 21 Connecticut cities in this dataset, Stamford ranks 1 for seismic hazard, the 100th percentile within the state. About 139,134 people live in Stamford, Connecticut.

What a retrofit costs in Stamford

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

Earthquake insurance for a Stamford 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 Stamford address.

More on how this number was built

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