Does Kent, WA need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Kent in Seismic Design 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. Rank it against the rest of the country and Kent sits at the 92th percentile for seismic hazard among 4,875 US cities.

Kent by the numbers

USGS's underlying values for Kent: 0.564g peak ground acceleration, 1.329g at short period, 0.455g at 1 second. Within Washington alone, Kent ranks 29 of 125 cities by seismic hazard - the 77th percentile in-state. Kent has a population of about 136,588.

Retrofit economics for Kent

A full earthquake retrofit typically runs $5,000-$10,000 nationally (around $7,000 typical), driven mainly by house size and foundation type, not by Washington specifically. California's Earthquake Brace + Bolt grant, which covers a large share of this cost, is a California-only program and does not apply in Washington.

Insuring against this, not just retrofitting

A Kent homeowner cannot buy a standalone earthquake policy in most cases - it is added to an existing homeowners policy as an endorsement, so the place to start is a regular home-insurance quote.

Where Kent's figures come from

Kent's Category D and every number above trace to USGS's own ASCE 7-16 Design Maps service - see the methodology guide. See the category explainer for what Category D does and doesn't tell you about Kent.