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Single Family ResidenceResidential
$701,147$288 / 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 96How 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 $550,000 on Sep 26, 2019

4509 MONTARA DR

ANTIOCH, CA 94531
5
Beds
3
Baths
2,435 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.
0.14 ac
Lot SizeThe size of the land the home sits on, from county records.
1993
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
10
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

$701K
$672K low$730K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$550,000 · Sep 26, 2019

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,008 (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.$616,993 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$156,171
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$460,822
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$604,896

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.
43
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
25
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.0.14
CoolingThe type of cooling or air conditioning in the home.Central
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.Yes

Transaction History(9)

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(2)

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

E
Jack London Elementary SchoolD-
Elementary · Grades KG–6 · 0.2 mi
M
Black Diamond Middle SchoolD-
Middle · Grades 7–8 · 0.4 mi
H
Deer Valley High SchoolC
High · Grades 9–12 · 0.7 mi

District: Antioch Unified School District

Neighborhood · ZIP 94531These 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.41
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.78
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.373

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.22%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.1%
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.44,329
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,964 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$117,415
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$146,230
Average tempThe average temperature here across a full year.60°F
Annual precipHow much rain and melted snow falls here in a typical year.16 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

4509 Montara 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.

  • Worth more than 72% of homes in Antioch 94531
  • Costs less per square foot than 91% of homes in Contra Costa County
  • Bigger than 77% of homes in Contra Costa County
  • Newer than 75% of homes in Contra Costa County

What homes are worth in Antioch 94531

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

This home
$416K$909K

This home is worth more than 72% of homes in Antioch 94531.

How it measures up in Antioch 94531

The dot is this home. The mark in the middle is the typical home in Antioch 94531.

Estimated value$701,147
CheaperTypical $641,405Pricier

Pricier than 72% of homes nearby

Price per ft²$288
CheaperTypical $296Pricier

Pricier than 43% of homes nearby

Living area2,435 ft²
SmallerTypical 2,192 ft²Bigger

Bigger than 64% of homes nearby

Lot size0.14 ac
SmallerTypical 0.15 acBigger

Bigger than 42% of homes nearby

Year built1993
OlderTypical 1997Newer

Newer than 33% of homes nearby

How 4509 Montara Dr ranks against every home in each area.
MeasureThis homeAntioch 94531Contra Costa County
Estimated valuepricier than$701,14772% of homes46% of homes
Price per ft²pricier than$28843% of homes9% of homes
Living areabigger than2,435 ft²64% of homes77% of homes
Lot sizebigger than0.14 ac42% of homes44% of homes
Year builtnewer than199333% of homes75% of homes

About 4509 Montara Dr

How much is 4509 Montara Dr, Antioch, CA worth?

The TopHap Estimate for 4509 Montara Dr, Antioch, CA is $701,147 as of Oct 21, 2026. The likely range is $672,415 to $729,879. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4509 Montara Dr, Antioch, CA last sell?

4509 Montara Dr, Antioch, CA last sold on Sep 26, 2019 for $550,000, according to the county's recorded deed. TopHap holds 8 recorded sales for this parcel.

How big is 4509 Montara Dr, Antioch, CA?

4509 Montara Dr, Antioch, CA has 5 bedrooms, 3 bathrooms, 2,435 square feet of living space and a 0.14-acre lot.

When was 4509 Montara Dr, Antioch, CA built?

4509 Montara Dr, Antioch, CA was built in 1993, making it 33 years old. The building has 2 stories.

What schools serve 4509 Montara Dr, Antioch, CA?

4509 Montara Dr, Antioch, CA is assigned to Jack London Elementary School (elementary), rated D-; Black Diamond Middle School (middle), rated D-; Deer Valley High School (high), rated C. All sit in Antioch Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4509 Montara Dr, Antioch, CA compare to other homes in Antioch 94531?

Among the 14,939 homes in Antioch 94531, it is worth more than 72% of them ($701,147 against a typical $641,405), its price per square foot is higher than 43% of them ($288 against a typical $296), it is bigger than 64% of them (2,435 ft² against a typical 2,192 ft²), its lot is bigger than 42% of them (0.14 ac against a typical 0.15 ac) and it is newer than 33% of them (1993 against a typical 1997). Measured against all of Contra Costa County, it is worth more than 46% 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 4509 Montara Dr, Antioch, CA?

The 2025 property tax bill for 4509 Montara Dr, Antioch, CA was $7,008. The county assessed it at $616,993.

More homes on Montara Dr

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