Home Insurance in Grafton, Wisconsin
With a median home value of $328,800, Grafton is 16% lower than the Ozaukee County median.
Older homes can cost more to insure or rebuild because of aging wiring, roofing and plumbing. The typical home in Grafton was built around 1986. About 19% of homes were built before 1960, about 6 points below Ozaukee County's 25%.
In Grafton, the housing stock is 60% single-family homes and 31% apartments in buildings with 5+ units.
About 64% of owner-occupied homes in Grafton have a mortgage. Lenders require hazard (homeowners) insurance on any home carrying a mortgage.
The vacancy rate is 3%; vacant or unoccupied homes typically need a different coverage form than an owner-occupied policy. About 61% of occupied homes in Grafton are owner-occupied.
70% of homes in Grafton are primarily heated with natural gas.
FEMA rates Ozaukee County's overall risk as Relatively Low, led by hail (Relatively Low). Ozaukee County had 425 active NFIP flood policies as of September 2026. See the full Ozaukee 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 Wisconsin is $923 per year, according to the NAIC homeowners insurance report (2023 data).
Key figures
| Median home value | $328,800 |
|---|---|
| Median year built | 1986 |
| Owner-occupied share | 61% |
| Share of owner-occupied homes with a mortgage | 64% |
| Top county hazard | Hail (Relatively Low) |
| Active NFIP policies in Ozaukee County | 425 |
| Home insurance premium | $923 - 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)