Does Cedar Hills, UT need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Cedar Hills is Category D. High seismic hazard - this is the category most of coastal California, the Pacific Northwest, and other active fault regions fall into. Code mandates significant seismic detailing and restricts irregular structural configurations. This is the category the Brace + Bolt scope (cripple-wall bracing, foundation bolting) is built for. That puts Cedar Hills in the 94th percentile nationally for seismic hazard - higher than 94% of the 4,875 US cities USGS was checked against here.

Cedar Hills by the numbers

The raw figures: peak ground acceleration 0.621g, short-period spectral response 1.361g, 1-second spectral response 0.508g. Among 95 Utah cities in this dataset, Cedar Hills ranks 28 for seismic hazard, the 71th percentile within the state. About 9,916 people live in Cedar Hills, Utah.

What a retrofit costs in Cedar Hills

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

Earthquake insurance for a Cedar Hills 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 Cedar Hills address.

More on how this number was built

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