Home Insurance in Black Diamond, Washington
The median home value in Black Diamond is $779,100, 9% lower than the King County median.
Older homes can cost more to insure or rebuild because of aging wiring, roofing and plumbing. The typical home in Black Diamond was built around 2000. About 9% of homes were built before 1960, about 13 points below King County's 23%.
The housing stock in Black Diamond is 90% single-family homes, 4% apartments in buildings with 5+ units and 3% mobile or manufactured homes.
About 82% of owner-occupied homes in Black Diamond have a mortgage. Lenders require hazard (homeowners) insurance on any home carrying a mortgage.
About 86% of occupied homes in Black Diamond are owner-occupied. The vacancy rate is 5%; vacant or unoccupied homes typically need a different coverage form than an owner-occupied policy.
66% of homes in Black Diamond are primarily heated with natural gas.
What's the biggest home insurance risk near Black Diamond? FEMA's National Risk Index points to earthquake (Very High) in King County and King County had 6,820 active NFIP flood policies as of September 2026. See the full King County home insurance overview for all FEMA hazard ratings and flood coverage details. Earthquake damage is excluded from a standard homeowners policy.
The statewide average premium for a standard HO-3 homeowners policy in Washington is $1,232 per year, according to the NAIC homeowners insurance report (2023 data).
Key figures
| Median home value | $779,100 |
|---|---|
| Median year built | 2000 |
| Owner-occupied share | 86% |
| Share of owner-occupied homes with a mortgage | 82% |
| Top county hazard | Earthquake (Very High) |
| Active NFIP policies in King County | 6,820 |
| Home insurance premium | $1,232 - 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)