Home Insurance in Sullivan's Island, South Carolina
Sullivan's Island's median home value is $2,000,000+.
The typical home in Sullivan's Island was built around 1981. About 37% of homes were built before 1960, about 22 points above Charleston County's 15%. Aging wiring, roofing and plumbing in older homes can push up the cost to insure or rebuild them.
In Sullivan's Island, the housing stock is 91% single-family homes, 6% apartments in buildings with 5+ units and 1% mobile or manufactured homes.
About 69% of owner-occupied homes in Sullivan's Island have a mortgage. Lenders require hazard (homeowners) insurance on any home carrying a mortgage.
About 85% of occupied homes in Sullivan's Island are owner-occupied. The vacancy rate is 27%; 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. In Sullivan's Island, 81% of homes are primarily heated with electricity.
What's the biggest home insurance risk near Sullivan's Island? FEMA's National Risk Index points to coastal flooding (Very High) in Charleston County and Charleston County had 59,025 active NFIP flood policies as of September 2026. See the full Charleston County home insurance overview for all FEMA hazard ratings and flood coverage details. Flood damage is excluded from a standard homeowners policy.
The statewide average premium for a standard HO-3 homeowners policy in South Carolina is $1,753 per year, according to the NAIC homeowners insurance report (2023 data).
Key figures
| Median home value | $2,000,000+ |
|---|---|
| Median year built | 1981 |
| Owner-occupied share | 85% |
| Share of owner-occupied homes with a mortgage | 69% |
| Top county hazard | Coastal Flooding (Very High) |
| Active NFIP policies in Charleston County | 59,025 |
| Home insurance premium | $1,753 - 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)