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Single Family ResidenceResidential
$1,231,159$602 / ft²
TopHap EstimateOur estimate of what this home would sell for today, based on nearby sales, the home's size and features, and local price trends. It is a starting point, not an appraisal.· confidence 93How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026

21 CAPTAINS DR

ALAMEDA, CA 94502
3
Beds
2.5
Baths
2,044 ft²
Living AreaTotal finished area of the structures, from county records. Some counties include shared space like hallways or a building gym, so it may not match a listing.
4,007 ft²
Lot SizeThe size of the land the home sits on, from county records.
1980
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.2M
$1.1M low$1.3M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,091 (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.$392,733 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$125,235
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$267,498
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$385,033
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,315,260

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyALAMEDA
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1987
Lot (acres)The size of the land the home sits on, from county records.0.09
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(11)

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

Foreclosure Filings(1)

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

E
Amelia Earhart SchoolA+
Elementary · Grades KG–5 · 0.5 mi
M
Lincoln Middle SchoolA
Middle · Grades 6–8 · 1.1 mi
H
Alameda High SchoolA
High · Grades 9–12 · 1.6 mi

District: Alameda City Unified School District

Neighborhood · ZIP 94502These 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.43
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.90
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.379

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.45%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.8%
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.15,069
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.4,016 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$164,486
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$194,499
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

21 Captains Dr 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.

  • Costs less per square foot than 73% of homes in Harbor Bay Isle
  • Bigger than 73% of homes in Alameda County
  • Has a smaller lot than 82% of homes in Alameda County
  • Older than 79% of homes in Harbor Bay Isle

What homes are worth in Alameda 94502

Each bar is how many homes fall in that price range. The marker is this home.

This home
$658K$2.4M

This home is worth more than 63% of homes in Alameda 94502.

How it measures up in Alameda 94502

The dot is this home. The mark in the middle is the typical home in Alameda 94502.

Estimated value$1,231,159
CheaperTypical $1,092,456Pricier

Pricier than 63% of homes nearby

Price per ft²$602
CheaperTypical $638Pricier

Pricier than 38% of homes nearby

Living area2,044 ft²
SmallerTypical 1,701 ft²Bigger

Bigger than 70% of homes nearby

Lot size4,007 ft²
SmallerTypical 4,008 ft²Bigger

Bigger than 48% of homes nearby

Year built1980
OlderTypical 1984Newer

Newer than 44% of homes nearby

How 21 Captains Dr ranks against every home in each area.
MeasureThis homeHarbor Bay IsleAlameda 94502Alameda County
Estimated valuepricier than$1,231,15937% of homes63% of homes62% of homes
Price per ft²pricier than$60227% of homes38% of homes38% of homes
Living areabigger than2,044 ft²47% of homes70% of homes73% of homes
Lot sizebigger than4,007 ft²28% of homes48% of homes18% of homes
Year builtnewer than198021% of homes44% of homes69% of homes

About 21 Captains Dr

How much is 21 Captains Dr, Alameda, CA worth?

The TopHap Estimate for 21 Captains Dr, Alameda, CA is $1,231,159 as of Sep 24, 2026. The likely range is $1,144,645 to $1,317,673. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Captains Dr, Alameda, CA last sell?

21 Captains Dr, Alameda, CA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 21 Captains Dr, Alameda, CA?

21 Captains Dr, Alameda, CA has 3 bedrooms, 2.5 bathrooms, 2,044 square feet of living space and a 0.09-acre lot.

When was 21 Captains Dr, Alameda, CA built?

21 Captains Dr, Alameda, CA was built in 1980, making it 46 years old. The building has 2 stories.

What schools serve 21 Captains Dr, Alameda, CA?

21 Captains Dr, Alameda, CA is assigned to Amelia Earhart School (elementary), rated A+; Lincoln Middle School (middle), rated A; Alameda High School (high), rated A. All sit in Alameda City Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Captains Dr, Alameda, CA compare to other homes in Alameda 94502?

Among the 5,176 homes in Alameda 94502, it is worth more than 63% of them ($1,231,159 against a typical $1,092,456), its price per square foot is higher than 38% of them ($602 against a typical $638), it is bigger than 70% of them (2,044 ft² against a typical 1,701 ft²), its lot is bigger than 48% of them (4,007 ft² against a typical 4,008 ft²) and it is newer than 44% of them (1980 against a typical 1984). Measured against all of Alameda County, it is worth more than 62% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 21 Captains Dr, Alameda, CA?

The 2025 property tax bill for 21 Captains Dr, Alameda, CA was $7,091. The county assessed it at $392,733.

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