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Duplex (2 Units, Any Combination)Residential

509 D ST

UNION CITY, CA 94587
4
Beds
2
Baths
1,710 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.
0.11 ac
Lot SizeThe size of the land the home sits on, from county records.
1963
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
8
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,303 (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.$60,268 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$20,756
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$39,512
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$59,087

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Duplex (2 Units, Any Combination)
CountyALAMEDA
Lot (acres)The size of the land the home sits on, from county records.0.12
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(3)

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.

H
James Logan High SchoolA-
High · Grades 9–12 · 0.8 mi
E
Hillview Crest Elementary SchoolB-
Elementary · Grades KG–5 · 1.0 mi
M
Cesar Chavez Middle SchoolC-
Middle · Grades 6–8 · 1.6 mi

District: New Haven Unified School District

Neighborhood · ZIP 94587These 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.87
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.552

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.30%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.8%
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.66,162
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.5,241 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$129,537
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$155,780
Average tempThe average temperature here across a full year.58°F
Annual precipHow much rain and melted snow falls here in a typical year.19 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

509 D St 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 76% of homes in Union City 94587
  • Older than 90% of homes in Union City 94587

How it measures up in Union City 94587

The dot is this home. The mark in the middle is the typical home in Union City 94587.

Living area1,710 ft²
SmallerTypical 1,565 ft²Bigger

Bigger than 61% of homes nearby

Lot size0.11 ac
SmallerTypical 0.14 acBigger

Bigger than 24% of homes nearby

Year built1963
OlderTypical 1976Newer

Newer than 10% of homes nearby

How 509 D St ranks against every home in each area.
MeasureThis homeUnion City 94587Alameda County
Living areabigger than1,710 ft²61% of homes58% of homes
Lot sizebigger than0.11 ac24% of homes29% of homes
Year builtnewer than196310% of homes49% of homes

About 509 D St

When did 509 D St, Union City, CA last sell?

509 D St, Union City, CA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 509 D St, Union City, CA?

509 D St, Union City, CA has 4 bedrooms, 2 bathrooms, 1,710 square feet of living space and a 0.12-acre lot.

When was 509 D St, Union City, CA built?

509 D St, Union City, CA was built in 1963, making it 63 years old. The building has 1 story.

What schools serve 509 D St, Union City, CA?

509 D St, Union City, CA is assigned to James Logan High School (high), rated A-; Hillview Crest Elementary School (elementary), rated B-; Cesar Chavez Middle School (middle), rated C-. All sit in New Haven Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 509 D St, Union City, CA compare to other homes in Union City 94587?

Among the 17,563 homes in Union City 94587, it is bigger than 61% of them (1,710 ft² against a typical 1,565 ft²), its lot is bigger than 24% of them (0.11 ac against a typical 0.14 ac) and it is newer than 10% of them (1963 against a typical 1976). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 509 D St, Union City, CA?

The 2025 property tax bill for 509 D St, Union City, CA was $2,303. The county assessed it at $60,268.

More homes on D St

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Assigned schools

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