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Duplex (2 Units, Any Combination)Residential

166TH AVE

CASTRO VALLEY, CA 94580
0
Baths
2,585 ft²
Lot SizeThe size of the land the home sits on, from county records.

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,003 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$39,714 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$39,714
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$38,935

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.11 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Duplex (2 Units, Any Combination)
StyleThe architectural style of the home, such as ranch or colonial.Duplex Single
CountyALAMEDA
Lot (acres)The size of the land the home sits on, from county records.0.06
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(5)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Grant Elementary SchoolC+
Elementary · Grades KG–5 · 0.4 mi
H
Arroyo High SchoolB+
High · Grades 9–12 · 0.6 mi
M
Washington Manor Middle SchoolC+
Middle · Grades 6–8 · 1.3 mi

District: San Lorenzo Unified School District

Neighborhood · ZIP 94580These are comparison scores, not percentages. 100 equals the national average, so 150 means about 50% above average.

CrimeLocal crime compared with the rest of the country, where 100 is average. It reflects things like population density, income, and how crime gets reported.45
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.89
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.582

Index scale: 100 = US average (tick). Lower is better.

Homes occupiedThe share of homes here that someone lives in. The rest sit empty, including vacation and for-sale homes.98%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.23%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.28,849
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.8,205 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$97,479
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$130,534
Average tempThe average temperature here across a full year.58°F
Annual precipHow much rain and melted snow falls here in a typical year.20 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.78%

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Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

How this home compares

166th Ave measured against every home in its neighborhood, its ZIP code and its county, using county assessor records refreshed nightly. A home can stand out in one of those areas and look ordinary in another, because each one holds a different mix of homes.

  • Has a smaller lot than 96% of homes in Castro Valley

How it measures up in San Lorenzo 94580

The dot is this home. The mark in the middle is the typical home in San Lorenzo 94580.

Lot size2,585 ft²
SmallerTypical 0.12 acBigger

Bigger than 4% of homes nearby

How 166th Ave ranks against every home in each area.
MeasureThis homeCastro ValleySan Lorenzo 94580Alameda County
Lot sizebigger than2,585 ft²4% of homes4% of homes7% of homes

About 166th Ave

When did 166th Ave, Castro Valley, CA last sell?

166th Ave, Castro Valley, CA last sold on Jan 1, 1900, according to the county's recorded deed.

What schools serve 166th Ave, Castro Valley, CA?

166th Ave, Castro Valley, CA is assigned to Grant Elementary School (elementary), rated C+; Arroyo High School (high), rated B+; Washington Manor Middle School (middle), rated C+. All sit in San Lorenzo Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

What are the property taxes on 166th Ave, Castro Valley, CA?

The 2025 property tax bill for 166th Ave, Castro Valley, CA was $1,003. The county assessed it at $39,714.

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