Does Glendale, AZ need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Glendale is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Glendale ranks above 51% of the 4,875 cities in this dataset for seismic hazard - the 51th percentile.

Glendale by the numbers

The raw figures: peak ground acceleration 0.081g, short-period spectral response 0.184g, 1-second spectral response 0.067g. Among 57 Arizona cities in this dataset, Glendale ranks 47 for seismic hazard, the 18th percentile within the state. About 258,143 people live in Glendale, Arizona.

Bracing and bolting: the actual cost

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

Earthquake insurance for a Glendale 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 Glendale address.

More on how this number was built

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