ZIP 94546
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Bedroom estimates are gross rents that include essential utilities (electricity, water, gas, sewer, trash).
12-month history
Last updated: October 17, 2026
What the numbers show
Rent in ZIP 94546 is at its highest level since Zillow's records here began in June 2019.
Rent in ZIP 94546 changed +7.2% over the year to September 2026. Across the 819 California ZIP codes Zillow tracks, the typical change was +3.2%.
Rent in ZIP 94546 is 18% higher than in March 2020. Across the US, rent is up 37.3% over the same stretch.
Rent has risen 5 months in a row, and rose in 9 of the last 12 months.
30% of the median household income ($128,385) is $3,210 a month. That covers HUD's Fair Market Rent for up to a 2-bedroom ($3,000); a 3-bedroom is $3,840.
ZIP 94578, 3 miles away, rents for 16% less ($2,409/mo), about $5,600 a year in savings.
From Zillow's monthly rent index (ZORI) for ZIP 94546. Income is the Census median household income (5-year estimates). Fair Market Rents are HUD’s, which include utilities.
Who lives here
ZIP 94546 (Castro Valley, CA) is majority owner-occupied, has a median income above the national average, 41.7% of residents hold a bachelor's degree or higher.
Source: U.S. Census Bureau · ACS 2024 5-Year Estimates
How ZIP 94546 in Castro Valley, CA has changed in 5 years
Rent in ZIP 94546 in Castro Valley, CA has increased 19.3% since 2021, going from about $2,414 per month to roughly $2,879 today. Household income in the area moved from $111,570 to $128,385 across the same window, up 15.1% versus 2021. Rent outpaced income growth by roughly 4.2 percentage points, which means renters are spending a larger slice of each paycheck on housing than they did in 2021. Headcount in the area went from 46,169 to 44,855 between 2021 and 2024, a 2.8% change. Reading these numbers side by side helps frame whether current listings in ZIP 94546 in Castro Valley, CA look reasonable against where the market sat half a decade ago.
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Tips for renters in ZIP 94546
Last updated: October 17, 2026
ZIP code 94546 covers Castro Valley, CA. The median rent here is $2,879/mo as of October 2026. A 1-bedroom rents for a median of $2,460/mo. A 2-bedroom rents for a median of $3,000/mo.
At 27% of local median household income ($128,385/yr), ZIP 94546 ranks as affordable compared to the national benchmark of 30%. Rents have increased 7.2% over the past year.
Frequently asked questions
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How does ZIP 94546 compare to other ZIPs in California?
How does ZIP 94546 compare to the rest of Castro Valley?
At $2,879/mo, rent takes ~27% of ZIP 94546's median household income ($128,385/yr). The standard benchmark is 30%.
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