Home Insurance in St. Clair County, Michigan
The median home value in St. Clair County is $224,600, close to the Michigan median.
The typical home in St. Clair County was built around 1975. About 35% of homes were built before 1960, in line with Michigan (36%). Older homes can cost more to insure or rebuild because of aging wiring, roofing and plumbing.
Mobile and manufactured homes typically need a manufactured-home (HO-7) policy rather than a standard homeowners policy. The housing stock in St. Clair County is 82% single-family homes, 7% apartments in buildings with 5+ units and 7% mobile or manufactured homes.
In St. Clair County, about 57% of owner-occupied homes have a mortgage - lenders require hazard insurance on every mortgaged home.
About 81% of occupied homes in St. Clair County are owner-occupied. The vacancy rate is 7%; vacant or unoccupied homes typically need a different coverage form than an owner-occupied policy.
Homes heated with propane can carry added fire risk. Fuel-tank leaks and spills are often excluded from standard homeowners policies. Most homes in St. Clair County - 74% - are primarily heated with natural gas.
The top hazards for St. Clair County, per FEMA's National Risk Index, are tornado (Relatively Moderate), inland flooding (Relatively Moderate) and strong wind (Relatively High).
Standard homeowners insurance does not cover flood damage, so flood coverage needs a separate NFIP or private flood policy. As of September 2026, St. Clair County has 1,291 active NFIP flood policies on file.
The statewide average premium for a standard HO-3 homeowners policy in Michigan is $1,110 per year, according to the NAIC homeowners insurance report (2023 data).
Key figures
| Median home value | $224,600 |
|---|---|
| Median year built | 1975 |
| Owner-occupied share | 81% |
| Share of owner-occupied homes with a mortgage | 57% |
| Top hazards (FEMA National Risk Index) | Tornado (Relatively Moderate), Inland Flooding (Relatively Moderate), Strong Wind (Relatively High) |
| Active NFIP flood policies (county) | 1,291 |
| Home insurance premium | $1,110 - statewide average (NAIC, 2023 data) |
Towns and cities
Sources
- U.S. Census Bureau Gazetteer Files (2024)
- U.S. Census Bureau, American Community Survey 2020-2024 5-Year Estimates (2024)
- FEMA National Risk Index (December 2025)
- FEMA OpenFEMA NFIP Redacted Policies v3 (2026)
- NAIC Dwelling Fire, Homeowners Owner-Occupied, and Homeowners Tenant and Condominium/Cooperative Unit Owners Insurance: Data for 2023 (published 2026) (2023)