Does Ridgefield Park, NJ need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Ridgefield Park in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Ridgefield Park in the 66th percentile nationally for seismic hazard - higher than 66% of the 4,875 US cities USGS was checked against here.

Where Ridgefield Park sits in New Jersey

USGS's underlying values for Ridgefield Park: 0.183g peak ground acceleration, 0.295g at short period, 0.061g at 1 second. Within New Jersey alone, Ridgefield Park ranks 28 of 194 cities by seismic hazard - the 86th percentile in-state. Ridgefield Park has a population of about 13,400.

Bracing and bolting: the actual cost

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 Ridgefield Park home

A Ridgefield Park 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 Ridgefield Park's figures come from

Ridgefield Park'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 Ridgefield Park.