Does Tecumseh, MI need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Tecumseh is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Tecumseh ranks above 37% of the 4,875 cities in this dataset for seismic hazard - the 37th percentile.

Where Tecumseh sits in Michigan

USGS's underlying values for Tecumseh: 0.06g peak ground acceleration, 0.117g at short period, 0.051g at 1 second. Within Michigan alone, Tecumseh ranks 10 of 153 cities by seismic hazard - the 94th percentile in-state. Tecumseh has a population of about 8,606.

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 Michigan 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 Michigan.

What this means for insurance

A Tecumseh 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 Tecumseh's figures come from

Tecumseh'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 Tecumseh.