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Single Family ResidenceResidential
$391,360$225 / 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 85How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026
Last sold for $400,000 on Jun 26, 2025

504 W 15TH ST

ANTIOCH, CA 94509
4
Beds
2
Baths
1,737 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.
1929
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
9
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$391K
$334K low$449K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$400,000 · Jun 26, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,144 (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.$408,000 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$204,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$204,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$271,225

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.19
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
1
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
44
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
28
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
25
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.

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
CountyCONTRA COSTA
Lot (acres)The size of the land the home sits on, from county records.0.12
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.

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

E
Fremont Elementary SchoolF
Elementary · Grades KG–5 · 0.1 mi
M
Antioch Middle SchoolF
Middle · Grades 6–8 · 0.1 mi
H
Antioch High SchoolD
High · Grades 9–12 · 0.2 mi

District: Antioch Unified School District

Neighborhood · ZIP 94509These 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.118
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.83
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.369

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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.14%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.15%
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.67,731
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,169 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$76,351
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$104,120
Average tempThe average temperature here across a full year.60°F
Annual precipHow much rain and melted snow falls here in a typical year.17 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

504 W 15th 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 94% of homes in Contra Costa County
  • Among the lowest price per square foot in Contra Costa County
  • Bigger than 67% of homes in Antioch 94509
  • Has a smaller lot than 85% of homes in Antioch 94509
  • Older than 97% of homes in Contra Costa County

What homes are worth in Antioch 94509

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

This home
$215K$749K

This home is worth more than 15% of homes in Antioch 94509.

How it measures up in Antioch 94509

The dot is this home. The mark in the middle is the typical home in Antioch 94509.

Estimated value$391,360
CheaperTypical $510,842Pricier

Pricier than 15% of homes nearby

Price per ft²$225
CheaperTypical $323Pricier

Pricier than 5% of homes nearby

Living area1,737 ft²
SmallerTypical 1,500 ft²Bigger

Bigger than 67% of homes nearby

Lot size0.11 ac
SmallerTypical 0.15 acBigger

Bigger than 15% of homes nearby

Year built1929
OlderTypical 1974Newer

Newer than 4% of homes nearby

How 504 W 15th St ranks against every home in each area.
MeasureThis homeAntioch 94509Contra Costa County
Estimated valuepricier than$391,36015% of homes6% of homes
Price per ft²pricier than$2255% of homesalmost no homes
Living areabigger than1,737 ft²67% of homes49% of homes
Lot sizebigger than0.11 ac15% of homes27% of homes
Year builtnewer than19294% of homes3% of homes

About 504 W 15th St

How much is 504 W 15th St, Antioch, CA worth?

The TopHap Estimate for 504 W 15th St, Antioch, CA is $391,360 as of Oct 21, 2026. The likely range is $334,161 to $448,559. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 504 W 15th St, Antioch, CA last sell?

504 W 15th St, Antioch, CA last sold on Jun 26, 2025 for $400,000, according to the county's recorded deed.

How big is 504 W 15th St, Antioch, CA?

504 W 15th St, Antioch, CA has 4 bedrooms, 2 bathrooms, 1,737 square feet of living space and a 0.12-acre lot.

When was 504 W 15th St, Antioch, CA built?

504 W 15th St, Antioch, CA was built in 1929, making it 97 years old. The building has 1 story.

What schools serve 504 W 15th St, Antioch, CA?

504 W 15th St, Antioch, CA is assigned to Fremont Elementary School (elementary), rated F; Antioch Middle School (middle), rated F; Antioch High School (high), rated D. All sit in Antioch Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 504 W 15th St, Antioch, CA compare to other homes in Antioch 94509?

Among the 18,216 homes in Antioch 94509, it is worth more than 15% of them ($391,360 against a typical $510,842), its price per square foot is higher than 5% of them ($225 against a typical $323), it is bigger than 67% of them (1,737 ft² against a typical 1,500 ft²), its lot is bigger than 15% of them (0.11 ac against a typical 0.15 ac) and it is newer than 4% of them (1929 against a typical 1974). Measured against all of Contra Costa County, it is worth more than 6% 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 504 W 15th St, Antioch, CA?

The 2025 property tax bill for 504 W 15th St, Antioch, CA was $4,144. The county assessed it at $408,000.

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