Woodinville, WA: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Woodinville 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. Rank it against the rest of the country and Woodinville sits at the 92th percentile for seismic hazard among 4,875 US cities.

Where Woodinville sits in Washington

USGS's underlying values for Woodinville: 0.553g peak ground acceleration, 1.288g at short period, 0.454g at 1 second. Within Washington alone, Woodinville ranks 33 of 125 cities by seismic hazard - the 74th percentile in-state. Woodinville has a population of about 13,942.

Retrofit economics for Woodinville

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 Woodinville 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 Woodinville's figures come from

Woodinville'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 Woodinville.