Lynnwood, WA: what USGS's seismic model says

Lynnwood carries Seismic Design Category D under USGS's ASCE 7-16 model. 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 Lynnwood in the 92th percentile nationally for seismic hazard - higher than 92% of the 4,875 US cities USGS was checked against here.

Where Lynnwood sits in Washington

USGS's underlying values for Lynnwood: 0.563g peak ground acceleration, 1.312g at short period, 0.465g at 1 second. Within Washington alone, Lynnwood ranks 31 of 125 cities by seismic hazard - the 76th percentile in-state. Lynnwood has a population of about 41,597.

Retrofit economics for Lynnwood

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 Lynnwood 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 Lynnwood's figures come from

Lynnwood'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 Lynnwood.