Does New Carrollton, MD need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, New Carrollton is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, New Carrollton ranks above 43% of the 4,875 cities in this dataset for seismic hazard - the 43th percentile.

Where New Carrollton sits in Maryland

USGS's underlying values for New Carrollton: 0.068g peak ground acceleration, 0.132g at short period, 0.043g at 1 second. Within Maryland alone, New Carrollton ranks 22 of 46 cities by seismic hazard - the 53th percentile in-state. New Carrollton has a population of about 13,645.

Retrofit economics for New Carrollton

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 Maryland 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 Maryland.

What this means for insurance

A New Carrollton 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 New Carrollton's figures come from

New Carrollton'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 New Carrollton.