Does Mount Vernon, WA need an earthquake retrofit?

Mount Vernon 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 Mount Vernon in the 89th percentile nationally for seismic hazard - higher than 89% of the 4,875 US cities USGS was checked against here.

Where Mount Vernon sits in Washington

USGS's underlying values for Mount Vernon: 0.466g peak ground acceleration, 1.095g at short period, 0.39g at 1 second. Within Washington alone, Mount Vernon ranks 76 of 125 cities by seismic hazard - the 40th percentile in-state. Mount Vernon has a population of about 35,344.

What a retrofit costs in Mount Vernon

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.

Earthquake insurance for a Mount Vernon home

A Mount Vernon 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 Mount Vernon's figures come from

Mount Vernon'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 Mount Vernon.