Cohoes, NY: what USGS's seismic model says
Cohoes carries Seismic Design Category B under USGS's ASCE 7-16 model. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Cohoes in the 57th percentile nationally for seismic hazard - higher than 57% of the 4,875 US cities USGS was checked against here.
Where Cohoes sits in New York
USGS's underlying values for Cohoes: 0.106g peak ground acceleration, 0.199g at short period, 0.061g at 1 second. Within New York alone, Cohoes ranks 103 of 170 cities by seismic hazard - the 40th percentile in-state. Cohoes has a population of about 18,530.
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 New York 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 New York.
Insuring against this, not just retrofitting
A Cohoes 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 Cohoes's figures come from
Cohoes'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 Cohoes.