Does Bremerton, WA need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Bremerton 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 Bremerton in the 95th percentile nationally for seismic hazard - higher than 95% of the 4,875 US cities USGS was checked against here.

Where Bremerton sits in Washington

USGS's underlying values for Bremerton: 0.69g peak ground acceleration, 1.62g at short period, 0.568g at 1 second. Within Washington alone, Bremerton ranks 6 of 125 cities by seismic hazard - the 96th percentile in-state. Bremerton has a population of about 45,291.

What a retrofit costs in Bremerton

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 Bremerton 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 Bremerton's figures come from

Bremerton'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 Bremerton.