Does Brewton, AL need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Brewton is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Brewton in the 26th percentile nationally for seismic hazard - higher than 26% of the 4,875 US cities USGS was checked against here.

Brewton by the numbers

USGS's underlying values for Brewton: 0.046g peak ground acceleration, 0.096g at short period, 0.062g at 1 second. Within Alabama alone, Brewton ranks 93 of 107 cities by seismic hazard - the 13th percentile in-state. Brewton has a population of about 5,129.

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 Alabama 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 Alabama.

What this means for insurance

A Brewton 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 Brewton's figures come from

Brewton'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 Brewton.