Richardson, TX: what USGS's seismic model says

Richardson carries Seismic Design Category B under USGS's ASCE 7-16 model. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Richardson in the 31th percentile nationally for seismic hazard - higher than 31% of the 4,875 US cities USGS was checked against here.

Richardson by the numbers

The raw figures: peak ground acceleration 0.052g, short-period spectral response 0.107g, 1-second spectral response 0.056g. Among 384 Texas cities in this dataset, Richardson ranks 74 for seismic hazard, the 81th percentile within the state. About 118,221 people live in Richardson, Texas.

Bracing and bolting: the actual cost

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

Insuring against this, not just retrofitting

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 Richardson address.

More on how this number was built

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