Holly Hill, FL: what USGS's seismic model says

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Holly Hill in Seismic Design Category A: Lowest seismic design category. Building code requires no seismic-specific detailing here beyond ordinary construction practice. Nationally, Holly Hill ranks above 13% of the 4,875 cities in this dataset for seismic hazard - the 13th percentile.

Holly Hill by the numbers

USGS's underlying values for Holly Hill: 0.034g peak ground acceleration, 0.072g at short period, 0.039g at 1 second. Within Florida alone, Holly Hill ranks 41 of 228 cities by seismic hazard - the 82th percentile in-state. Holly Hill has a population of about 13,183.

Retrofit economics for Holly Hill

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 Florida 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 Florida.

Earthquake insurance for a Holly Hill home

A Holly Hill 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 Holly Hill's figures come from

Holly Hill's Category A 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 A does and doesn't tell you about Holly Hill.