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Single Family ResidenceResidential
$878,948
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 96How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026

12TH ST

UNION CITY, CA 94587
0
Baths
475 ft²
Lot SizeThe size of the land the home sits on, from county records.

Valuation

$879K
$846K low$912K high

Tax & Assessment

Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$904,950

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.18 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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.1 percent flood zone

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyALAMEDA
Lot (acres)The size of the land the home sits on, from county records.0.01
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(1)

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
Searles Elementary SchoolC+
Elementary · Grades KG–5 · 0.4 mi
H
James Logan High SchoolA-
High · Grades 9–12 · 0.7 mi
M
Cesar Chavez Middle SchoolC-
Middle · Grades 6–8 · 1.2 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

12th 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.

  • Worth less than 75% of homes in Union City 94587
  • Among the smallest lots in Union City 94587

What homes are worth in Union City 94587

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

This home
$479K$2.3M

This home is worth more than 25% 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.

Estimated value$878,948
CheaperTypical $1,264,468Pricier

Pricier than 25% of homes nearby

Lot size475 ft²
SmallerTypical 0.14 acBigger

Smaller than almost all homes nearby

How 12th St ranks against every home in each area.
MeasureThis homeUnion City 94587Alameda County
Estimated valuepricier than$878,94825% of homes38% of homes
Lot sizebigger than475 ft²almost no homesalmost no homes

About 12th St

How much is 12th St, Union City, CA worth?

The TopHap Estimate for 12th St, Union City, CA is $878,948 as of Aug 30, 2026. The likely range is $845,599 to $912,297. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 12th St, Union City, CA last sell?

12th St, Union City, CA last sold on Jan 1, 1900, according to the county's recorded deed.

What schools serve 12th St, Union City, CA?

12th St, Union City, CA is assigned to Searles Elementary School (elementary), rated C+; James Logan High School (high), rated A-; 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 12th St, Union City, CA compare to other homes in Union City 94587?

Among the 17,563 homes in Union City 94587, it is worth more than 25% of them ($878,948 against a typical $1,264,468) and its lot is bigger than almost none of them (475 ft² against a typical 0.14 ac). Measured against all of Alameda County, it is worth more than 38% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

More homes on 12th St

Closest homes

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Assigned schools

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