Round Rock, TX: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Round Rock is Category A. Lowest seismic design category. Building code requires no seismic-specific detailing here beyond ordinary construction practice. Rank it against the rest of the country and Round Rock sits at the 9th percentile for seismic hazard among 4,875 US cities.

Where Round Rock sits in Texas

USGS's underlying values for Round Rock: 0.026g peak ground acceleration, 0.054g at short period, 0.034g at 1 second. Within Texas alone, Round Rock ranks 304 of 384 cities by seismic hazard - the 21th percentile in-state. Round Rock has a population of about 135,359.

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 Texas 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 Texas.

Earthquake insurance for a Round Rock home

A Round Rock 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 Round Rock's figures come from

Round Rock'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 Round Rock.