Does Manassas Park, VA need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Manassas Park in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Manassas Park in the 48th percentile nationally for seismic hazard - higher than 48% of the 4,875 US cities USGS was checked against here.

How Manassas Park compares

The raw figures: peak ground acceleration 0.075g, short-period spectral response 0.142g, 1-second spectral response 0.045g. Among 63 Virginia cities in this dataset, Manassas Park ranks 36 for seismic hazard, the 44th percentile within the state. About 16,611 people live in Manassas Park, Virginia.

What a retrofit costs in Manassas Park

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Virginia. A typical retrofit still runs $5,000-$10,000 nationally, about $7,000 for a common single-family job.

Earthquake insurance for a Manassas Park home

Outside California, earthquake coverage is typically sold as an endorsement added to a standard homeowners policy, not a separate product - worth asking about directly when getting a home-insurance quote for a Manassas Park address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Manassas Park's numbers. The guide to what a Seismic Design Category actually means covers why a category is never a substitute for an engineer's assessment of one specific house.