Does Caldwell, NJ need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Caldwell 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 Caldwell sits at the 64th percentile for seismic hazard among 4,875 US cities.

Where Caldwell sits in New Jersey

USGS's underlying values for Caldwell: 0.174g peak ground acceleration, 0.283g at short period, 0.059g at 1 second. Within New Jersey alone, Caldwell ranks 75 of 194 cities by seismic hazard - the 62th percentile in-state. Caldwell has a population of about 9,326.

Retrofit economics for Caldwell

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 Caldwell home

A Caldwell 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 Caldwell's figures come from

Caldwell'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 Caldwell.