Hampstead, MD: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Hampstead is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Hampstead in the 50th percentile nationally for seismic hazard - higher than 50% of the 4,875 US cities USGS was checked against here.

Where Hampstead sits in Maryland

USGS's underlying values for Hampstead: 0.079g peak ground acceleration, 0.148g at short period, 0.044g at 1 second. Within Maryland alone, Hampstead ranks 5 of 46 cities by seismic hazard - the 91th percentile in-state. Hampstead has a population of about 6,288.

What a retrofit costs in Hampstead

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.

Earthquake insurance for a Hampstead home

A Hampstead 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 Hampstead's figures come from

Hampstead'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 Hampstead.