Neighborhood · Alameda County
Alameda County: 598,246
Alameda County: 46%
Alameda County: $2,357
Alameda County: 637,212
Alameda County: 54%
Alameda County: 46%
Survey statistics come from the Census Bureau's American Community Survey, pooled over 2020–2024. They describe that five-year period, not today.
The Census doesn't publish figures for neighborhoods, so we build them from 43 census block groups: 30 lie entirely inside, and 13 only partly, counted by the share of their 2020 Census housing units inside the boundary (26% of homes here sit in those partial block groups).
Margins of error (±) are at 90% confidence, computed from the Census Bureau's 80 variance replicates, so they account for the survey's design. Medians are interpolated from the published brackets. Estimates whose margin is large relative to the value are marked caution (coefficient of variation over 15%) or unreliable (over 30%).
Alameda County: $130,000
Alameda County: $1,117,000
Alameda County: 1969
“Higher” or “lower” only where the gap exceeds both margins of error combined (90% confidence).
Source: U.S. Census Bureau, American Community Survey 5-year estimates, variance replicate tables (block groups) · Geography: Castro Valley, apportioned from 43 census block groups · Source updated Jan 29, 2026 · Retrieved Oct 27, 2026 · How these numbers are built
Alameda County: 6.1%
Alameda County: 5.7%
Alameda County: 0.8%
Source: U.S. Census Bureau, American Community Survey 5-year estimates, variance replicate tables (block groups) · Geography: Castro Valley, apportioned from 43 census block groups · Source updated Jan 29, 2026 · Retrieved Oct 27, 2026
Alameda County: $2,357
Alameda County: 50%
Alameda County: 26%
Alameda County: 2.7%
Source: U.S. Census Bureau, American Community Survey 5-year estimates, variance replicate tables (block groups) · Geography: Castro Valley, apportioned from 43 census block groups · Source updated Jan 29, 2026 · Retrieved Oct 27, 2026 · Gross rent is what tenants reported paying, including utilities, across all leases (not just new ones).
HUD's 40th-percentile gross rent for standard-quality units recently rented, set for the Housing Choice Voucher program. A program standard, not an estimate of what homes here rent for.
| Area | Studio | 1 BR | 2 BR | 3 BR | 4 BR |
|---|---|---|---|---|---|
| ZIP 94546 · 72% of homes | $2,210 | $2,460 | $3,000 | $3,840 | $4,550 |
| ZIP 94552 · 17% of homes | $2,460 | $2,740 | $3,340 | $4,270 | $5,060 |
| ZIP 94578 · 10% of homes | $1,990 | $2,220 | $2,710 | $3,470 | $4,110 |
| Oakland-Fremont metro area | $2,142 | $2,385 | $2,912 | $3,724 | $4,413 |
Source: U.S. Department of Housing and Urban Development (eGIS), Small Area Fair Market Rents (by ZIP) · Geography: ZIP code (Small Area FMR) and HUD FMR area · Retrieved Oct 26, 2026 · Fiscal year 2026 (effective October 1 of the prior year).
Alameda County: $130,000
Alameda County: $1,117,000
Source: U.S. Census Bureau, American Community Survey 5-year estimates, variance replicate tables (block groups) · Geography: Castro Valley, apportioned from 43 census block groups · Source updated Jan 29, 2026 · Retrieved Oct 27, 2026 · Home value is the owner's own estimate, averaged over five survey years. It is not a sale price, appraisal, or assessed value.
A typical (middle-third) home value for the whole ZIP code, which extends beyond this neighborhood. Not an estimate for any home here.
| ZIP | Typical value | 1-yr change | 5-yr change |
|---|---|---|---|
| 94546 · 72% of homes | $1,006,862 | +1.5% | +5.0% |
| 94552 · 17% of homes | $1,364,641 | +1.0% | +8.0% |
| 94578 · 10% of homes | $765,957 | -0.3% | -2.8% |
| Alameda County | $1,044,951 | -0.4% | +1.1% |
No city in Alameda County publishes its building permits as open data. New housing in every city comes from the state's Housing Element reports.
Units by report year, from each city's Housing Element Annual Progress Report. One project can appear at several stages across years.
Source: California HCD, Housing Element Annual Progress Report — Table A2 · Geography: projects located inside the area · Retrieved Oct 26, 2026
Want the official figures for a single tract or block group? Look up a GEOID on data.census.gov.
Source: U.S. Census Bureau, American Community Survey 5-year estimates, variance replicate tables (block groups) · Geography: census block groups · Source updated Jan 29, 2026 · Retrieved Oct 27, 2026
Source: U.S. Census Bureau (TIGERweb), 2020 Census Blocks (housing units, population, internal points) · Geography: census blocks (apportioning weights) · Retrieved Oct 26, 2026
Source: Zillow Research, Zillow Home Value Index (ZHVI), ZIP and County · Geography: ZIP code · Retrieved Oct 26, 2026 · Through September 2026. Data provided by Zillow.