Home Insurance in Theresa, New York
The median home value in Theresa is $164,900, 12% lower than the Jefferson County median.
Older homes can cost more to insure or rebuild because of aging wiring, roofing and plumbing. The typical home in Theresa was built around 1959. About 50% of homes were built before 1960, about 8 points above Jefferson County's 42%.
The housing stock in Theresa is 61% single-family homes, 2% apartments in buildings with 5+ units and 3% mobile or manufactured homes. The rest are 2-4 unit or other housing types. Mobile and manufactured homes typically need a manufactured-home (HO-7) policy rather than a standard homeowners policy.
About 56% of owner-occupied homes in Theresa have a mortgage. Lenders require hazard (homeowners) insurance on any home carrying a mortgage.
Theresa has an owner-occupancy rate of 58% and a vacancy rate of 10%; unoccupied homes typically need a different coverage form.
37% of homes in Theresa are primarily heated with electricity. Homes heated with propane and fuel oil can carry added fire risk. Fuel-tank leaks and spills are often excluded from standard homeowners policies.
Jefferson County's top FEMA-rated hazard is winter weather (Relatively High), per FEMA's National Risk Index. Jefferson County had 285 active NFIP flood policies as of September 2026. See the full Jefferson County home insurance overview for all FEMA hazard ratings and flood coverage details.
The statewide average premium for a standard HO-3 homeowners policy in New York is $1,801 per year, according to the NAIC homeowners insurance report (2023 data).
Key figures
| Median home value | $164,900 |
|---|---|
| Median year built | 1959 |
| Owner-occupied share | 58% |
| Share of owner-occupied homes with a mortgage | 56% |
| Top county hazard | Winter Weather (Relatively High) |
| Active NFIP policies in Jefferson County | 285 |
| Home insurance premium | $1,801 - 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)