Does Placerville, CA need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Placerville is Category C. Moderate seismic hazard. Code adds irregular-building restrictions and requires bracing of some nonstructural components (e.g. tall shelving, water heaters) in addition to structural detailing. That puts Placerville in the 77th percentile nationally for seismic hazard - higher than 77% of the 4,875 US cities USGS was checked against here.

Placerville by the numbers

The raw figures: peak ground acceleration 0.189g, short-period spectral response 0.443g, 1-second spectral response 0.206g. Among 429 California cities in this dataset, Placerville ranks 423 for seismic hazard, the 1th percentile within the state. About 10,695 people live in Placerville, California.

Retrofit economics for Placerville

Because Placerville is in California, the EBB grant applies if the ZIP code participates and the house qualifies (wood-framed house on a raised (not slab-on-grade) foundation, built before 1980): a $3,000-$7,000 bracing-and-bolting job drops to $0-$4,000 after the $3,000 base grant, or effectively free for income-eligible households getting the full $10,000.

Earthquake insurance for a Placerville home

Earthquake coverage in California mostly runs through the California Earthquake Authority (CEA), sold only through licensed agents at CEA-participating insurers - there is no direct-to-consumer CEA policy. A general home-insurance quote is the practical starting point for a Placerville homeowner asking about it.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Placerville's numbers. The retrofit cost and grant guide covers every EBB eligibility rule, including the ones this page can't check.