ZIP 94027 · San Mateo County

Atherton, CA Homeowners Insurance

Homeowners insurance market metrics for ZIP 94027, Atherton, California.

25.8%
Loss ratio
1.07%
Nonrenewal rate
#6 of 1545
California rank
526
Policies

The verdict

Atherton, CA (ZIP 94027) averages $7,901/yr for homeowners insurance, 345% above the U.S. average, placing it in the 99th percentile nationally.

$7,901
Avg premium (2022)
+345%
vs U.S. average
+15.3%
since 2018
99th
national percentile

According to U.S. Treasury Federal Insurance Office data. How we calculate the percentile and national comparison: methodology.

Avg Premium (2022)
$7,901/yr
+15.3% since 2018
Loss Ratio
25.8%
Claims paid vs premiums
Claim Frequency
3.79%
Avg severity: $53,786
Nonrenewal Rate
1.07%
+158.7% change

Data Snapshot: ZIP 94027 (Atherton, CA)

U.S. Treasury FIO ZIP-level observations put the average homeowners insurance premium in ZIP 94027 (Atherton, CA) at $7,901 per year for 2022 across approximately 526 reported policies. Against a national average of $1,776 per year, ZIP 94027 comes in 345% above, the 99th percentile among all tracked ZIPs. Against California's average of $1,864, ZIP 94027 is 324% above, ranking #6 of 1545 tracked ZIPs in California by premium. The closest-priced peer within California is Malibu (ZIP 90265) at $8,311, 5% above this ZIP's rate.

The loss ratio for ZIP 94027 is 25.8%, meaning insurers retained a working margin after claims. About 3.79% of policyholders in this ZIP file a claim annually, and the average claim severity (amount paid per claim) is $53,786. The nonrenewal rate here is 1.07%, a rise of 158.7% over the past five years, the share of policies insurers choose not to extend at expiration, often a leading sign of market stress.

Since 2018, premiums here have risen by 15.3% through 2022, ranging $6,855 to $8,139 with a 5-year average of $7,574, an annualized rate of +3.6% per year.

How to read these numbers

The figures on this page come from the U.S. Treasury Federal Insurance Office, which collects homeowners insurance premium and claims data directly from the largest property insurers in the country. Because the data is aggregated at the ZIP-code level and averaged across many policies, it describes the typical cost in an area rather than a quote for any single home. Two houses on the same street can pay very different premiums depending on their age, construction type, roof condition, prior claims, and the specific coverage limits and deductibles the homeowner selects. The loss ratio shows how much of every premium dollar insurers paid back out as claims; a ratio above one means carriers lost money locally, which often precedes rate increases or carrier exits. Rising nonrenewal and claim frequency reveal how stressed the local market has become. Use these figures to gauge the direction and scale of costs in your area, then request quotes from several licensed carriers before buying or renewing a policy. FIO data aggregates voluntary reporting from the 40 largest homeowners insurers, covering roughly 80% of the U.S. market, so figures represent market averages rather than individual policy quotes; your own premium will vary with dwelling value, deductible, coverage limits, construction type, and insurer-specific underwriting. This page is educational research only and is not insurance advice, homeowners should request quotes from multiple licensed carriers or an independent agent before purchasing or renewing coverage.

How ZIP 94027 Compares

vs National Average
$7,901 vs $1,776
345% above national avg
vs California Average
$7,901 vs $1,864
324% above state avg
National Percentile
99th percentile
More expensive than most ZIPs

Premium History

Average premium in ZIP 94027, 2018–2022

$6,500$7,000$7,500$8,000$8,500 20182019202020212022 $7,901
Average homeowners premium per year in ZIP 94027.
Year Avg Premium YoY Change
2018 $6,855 -
2019 $7,249 +5.7%
2020 $7,728 +6.6%
2021 $8,139 +5.3%
2022 $7,901 -2.9%

5-Year Trend Summary

5-Year Avg Premium
$7,574
Premium Range
$6,855 - $8,139
Annual Change Rate
+3.6% per year
Years of Data
5 (2018-2022)

What this means for ZIP 94027

This ZIP runs well above the U.S. average, shop coverage actively and budget for it.

FIO figures are ZIP-level market averages across the largest insurers (~80% of the market), not a quote for any single home. Request quotes from multiple licensed carriers before buying or renewing.

Source: U.S. Department of the Treasury, Federal Insurance Office (FIO) Homeowners Insurance Data (2018-2022). Premiums are ZIP-level averages and may not reflect individual policy costs U.S. Department of the Treasury, Federal Insurance Office (FIO) Homeowners Insurance Data (2018-2022). Premiums are ZIP-level averages and may not reflect individual policy costs

Frequently Asked Questions

How much is homeowners insurance in ZIP 94027?
Homeowners insurance runs above most of the country in ZIP 94027 (Atherton, CA): $7,901/year as of 2022, the 99th national percentile, #6 of 1545 ZIPs in California. Premiums have changed +15.3% over the past 5 years.
What affects homeowners insurance costs in Atherton, CA?
In ZIP 94027, insurers report a 25.8% loss ratio, a 3.79% claims frequency, and a 1.07% nonrenewal rate, the 99th national percentile for cost.
Is homeowners insurance expensive in ZIP 94027 compared to the national average?
Nationally, ZIP 94027 lands in the 99th percentile: its $7,901/yr average is 345% above the U.S. figure of $1,776/yr.
What is the nonrenewal rate in ZIP 94027?
The nonrenewal rate in ZIP 94027 is 1.07%, a rise of 158.7% over the past 5 years in California.
How have premiums trended in ZIP 94027 over 5 years?
ZIP 94027 premiums spanned $6,855 to $8,139 across the 2018-2022 window, a 5-year average of $7,574. The annualized change rate is +3.6% per year.
How does ZIP 94027 compare to the California state average?
The California state average is $1,864/yr; ZIP 94027 averages $7,901/yr, 324% above that figure, ranking #6 of 1545 tracked ZIPs in California by premium.

Every figure on PlainInsure is rendered directly from U.S. Treasury Federal Insurance Office data, no number is typed in by an editor. This page draws directly on U.S. Treasury FIO data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.