Home Insurance in Portola Valley, California
Homes in Portola Valley carry a median value of $2,000,000+.
Because older housing stock often has aging wiring, roofing or plumbing, it can cost more to insure or rebuild. The typical home in Portola Valley was built around 1966. About 28% of homes were built before 1960, about 13 points below San Mateo County's 40%.
In Portola Valley, the housing stock is 86% single-family homes and 13% apartments in buildings with 5+ units.
About 51% of owner-occupied homes in Portola Valley have a mortgage. Lenders require hazard (homeowners) insurance on any home carrying a mortgage.
Portola Valley has an owner-occupancy rate of 79% and a vacancy rate of 7%; unoccupied homes typically need a different coverage form.
Most homes in Portola Valley - 77% - are primarily heated with natural gas.
San Mateo County had 4,143 active NFIP flood policies as of September 2026. Its top FEMA-rated hazard is earthquake (Relatively High). See the full San Mateo County home insurance overview for all FEMA hazard ratings and flood coverage details. Earthquake damage is excluded from a standard homeowners policy.
According to the NAIC homeowners insurance report (2023 data), a standard HO-3 homeowners policy in California carries a statewide average premium of $1,655 per year.
Key figures
| Median home value | $2,000,000+ |
|---|---|
| Median year built | 1966 |
| Owner-occupied share | 79% |
| Share of owner-occupied homes with a mortgage | 51% |
| Top county hazard | Earthquake (Relatively High) |
| Active NFIP policies in San Mateo County | 4,143 |
| Home insurance premium | $1,655 - 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)