ZIP 94028 · San Mateo County

Portola Valley, CA Homeowners Insurance

Homeowners insurance market metrics for ZIP 94028, Portola Valley, California.

28.4%
Loss ratio
2.24%
Nonrenewal rate
#27 of 1545
California rank
165
Policies

The verdict

ZIP 94028 (Portola Valley, CA) homeowners insurance averages $4,773/yr, 99th percentile nationally, 169% above the U.S. norm.

$4,773
Avg premium (2022)
+169%
vs U.S. average
+19.2%
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)
$4,773/yr
+19.2% since 2018
Loss Ratio
28.4%
Claims paid vs premiums
Claim Frequency
2.24%
Avg severity: $60,390
Nonrenewal Rate
2.24%
+409.9% change

Data Snapshot: ZIP 94028 (Portola Valley, CA)

U.S. Treasury FIO ZIP-level observations put the average homeowners insurance premium in ZIP 94028 (Portola Valley, CA) at $4,773 per year for 2022 across approximately 165 reported policies. Against a national average of $1,776 per year, ZIP 94028 comes in 169% above, the 99th percentile among all tracked ZIPs. Against California's average of $1,864, ZIP 94028 is 156% above, ranking #27 of 1545 tracked ZIPs in California by premium. The closest-priced peer within California is Encino (ZIP 91436) at $4,745, essentially matching this ZIP's rate.

With a loss ratio of 28.4%, insurers retained a working margin after claims in ZIP 94028. The claim frequency here, the share of policies with at least one claim, stands at 2.24%, and the average claim severity (amount paid per claim) is $60,390. Insurers decline to renew 2.24% of policies in ZIP 94028 at expiration, a rise of 409.9% over the past five years; a rising rate typically signals carriers retreating from higher-risk markets.

Since 2018, premiums here have risen by 19.2% through 2022, ranging $4,005 to $4,853 with a 5-year average of $4,512, an annualized rate of +4.5% 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 94028 Compares

vs National Average
$4,773 vs $1,776
169% above national avg
vs California Average
$4,773 vs $1,864
156% above state avg
National Percentile
99th percentile
More expensive than most ZIPs

Premium History

Average premium in ZIP 94028, 2018–2022

$3,800$4,000$4,200$4,400$4,600$4,800$5,000 20182019202020212022 $4,773
Average homeowners premium per year in ZIP 94028.
Year Avg Premium YoY Change
2018 $4,005 -
2019 $4,353 +8.7%
2020 $4,577 +5.2%
2021 $4,853 +6.0%
2022 $4,773 -1.7%

5-Year Trend Summary

5-Year Avg Premium
$4,512
Premium Range
$4,005 - $4,853
Annual Change Rate
+4.5% per year
Years of Data
5 (2018-2022)

What this means for ZIP 94028

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 94028?
Homeowners insurance runs above most of the country in ZIP 94028 (Portola Valley, CA): $4,773/year as of 2022, the 99th national percentile, #27 of 1545 ZIPs in California. Premiums have changed +19.2% over the past 5 years.
What affects homeowners insurance costs in Portola Valley, CA?
In ZIP 94028, insurers report a 28.4% loss ratio, a 2.24% claims frequency, and a 2.24% nonrenewal rate, the 99th national percentile for cost.
Is homeowners insurance expensive in ZIP 94028 compared to the national average?
ZIP 94028 premiums of $4,773/yr are 169% above the national average of $1,776/yr. This ZIP is in the 99th percentile nationally.
What is the nonrenewal rate in ZIP 94028?
ZIP 94028 shows a nonrenewal rate of 2.24% in California, a rise of 409.9% over the past 5 years.
How have premiums trended in ZIP 94028 over 5 years?
ZIP 94028 premiums spanned $4,005 to $4,853 across the 2018-2022 window, a 5-year average of $4,512. The annualized change rate is +4.5% per year.
How does ZIP 94028 compare to the California state average?
ZIP 94028 runs 156% above the California state average ($1,864/yr vs this ZIP's $4,773/yr), ranking #27 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.