Does Alexandria, VA need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Alexandria in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Alexandria ranks above 44% of the 4,875 cities in this dataset for seismic hazard - the 44th percentile.

Alexandria by the numbers

USGS's underlying values for Alexandria: 0.069g peak ground acceleration, 0.134g at short period, 0.043g at 1 second. Within Virginia alone, Alexandria ranks 44 of 63 cities by seismic hazard - the 31th percentile in-state. Alexandria has a population of about 159,102.

Retrofit economics for Alexandria

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 Virginia 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 Virginia.

Earthquake insurance for a Alexandria home

A Alexandria 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 Alexandria's figures come from

Alexandria'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 Alexandria.