Home Insurance in Seneca, Illinois
The median home value in Seneca is $227,500, 41% higher than the LaSalle County median.
Aging wiring, roofing and plumbing in older homes can push up the cost to insure or rebuild them. The typical home in Seneca was built around 1976. About 24% of homes were built before 1960, about 22 points below LaSalle County's 47%.
The housing stock in Seneca is 84% single-family homes, 1% apartments in buildings with 5+ units and 7% mobile or manufactured homes. Mobile and manufactured homes typically need a manufactured-home (HO-7) policy rather than a standard homeowners policy.
In Seneca, about 58% of owner-occupied homes have a mortgage - lenders require hazard insurance on every mortgaged home.
The vacancy rate is 6%; vacant or unoccupied homes typically need a different coverage form than an owner-occupied policy. About 81% of occupied homes in Seneca are owner-occupied.
In Seneca, 88% of homes are primarily heated with natural gas.
LaSalle County had 270 active NFIP flood policies as of September 2026. Its top FEMA-rated hazard is inland flooding (Relatively Moderate). See the full LaSalle County home insurance overview for all FEMA hazard ratings and flood coverage details. Flood damage is excluded from a standard homeowners policy.
According to the NAIC homeowners insurance report (2023 data), a standard HO-3 homeowners policy in Illinois carries a statewide average premium of $1,480 per year.
Key figures
| Median home value | $227,500 |
|---|---|
| Median year built | 1976 |
| Owner-occupied share | 81% |
| Share of owner-occupied homes with a mortgage | 58% |
| Top county hazard | Inland Flooding (Relatively Moderate) |
| Active NFIP policies in LaSalle County | 270 |
| Home insurance premium | $1,480 - statewide average (NAIC, 2023 data) |
Nearby towns
Sources
Data last updated: 2026-09-29
- 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)