Florham Park's Seismic Design Category, explained

Florham Park carries Seismic Design Category B under USGS's ASCE 7-16 model. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Florham Park in the 63th percentile nationally for seismic hazard - higher than 63% of the 4,875 US cities USGS was checked against here.

How Florham Park compares

USGS's underlying values for Florham Park: 0.166g peak ground acceleration, 0.273g at short period, 0.058g at 1 second. Within New Jersey alone, Florham Park ranks 93 of 194 cities by seismic hazard - the 52th percentile in-state. Florham Park has a population of about 14,533.

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.

What this means for insurance

A Florham 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 Florham Park's figures come from

Florham 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 Florham Park.