Butler's Seismic Design Category, explained

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Butler in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Rank it against the rest of the country and Butler sits at the 63th percentile for seismic hazard among 4,875 US cities.

How Butler compares

USGS's underlying values for Butler: 0.166g peak ground acceleration, 0.273g at short period, 0.059g at 1 second. Within New Jersey alone, Butler ranks 94 of 194 cities by seismic hazard - the 52th percentile in-state. Butler has a population of about 8,196.

Retrofit economics for Butler

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 New Jersey 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 New Jersey.

Earthquake insurance for a Butler home

A Butler 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 Butler's figures come from

Butler's Category B 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 B does and doesn't tell you about Butler.