Home Insurance in Alton, Iowa
Homes in Alton carry a median value of $218,900 - 12% lower than the Sioux County median.
The typical home in Alton was built around 1967. Because older housing stock often has aging wiring, roofing or plumbing, it can cost more to insure or rebuild. About 36% of homes were built before 1960, about 4 points above Sioux County's 32%.
In Alton, the housing stock is 85% single-family homes, 3% apartments in buildings with 5+ units and 4% mobile or manufactured homes. Mobile and manufactured homes typically need a manufactured-home (HO-7) policy rather than a standard homeowners policy.
61% of owner-occupied homes in Alton carry a mortgage, and mortgage lenders require hazard insurance for as long as the loan is active.
Alton has an owner-occupancy rate of 88% and a vacancy rate of 9%; unoccupied homes typically need a different coverage form.
Most homes in Alton - 51% - are primarily heated with natural gas. Homes heated with propane can carry added fire risk. Fuel-tank leaks and spills are often excluded from standard homeowners policies.
Sioux County's top FEMA-rated hazard is hail (Relatively High), per FEMA's National Risk Index. Sioux County had 63 active NFIP flood policies as of September 2026. See the full Sioux County home insurance overview for all FEMA hazard ratings and flood coverage details.
In Iowa, the statewide average premium for a standard HO-3 homeowners policy is $1,342 per year (NAIC, 2023 data).
Key figures
| Median home value | $218,900 |
|---|---|
| Median year built | 1967 |
| Owner-occupied share | 88% |
| Share of owner-occupied homes with a mortgage | 61% |
| Top county hazard | Hail (Relatively High) |
| Active NFIP policies in Sioux County | 63 |
| Home insurance premium | $1,342 - 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)