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Single Family ResidenceResidential
$432,235$844 / 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 97How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $450,000 on Jul 5, 2023

820 MARIPOSA AVE

RODEO, CA 94572
1
Beds
2
Baths
512 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.
2,500 ft²
Lot SizeThe size of the land the home sits on, from county records.
1939
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
3
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

$432K
$418K low$447K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$450,000 · Jul 5, 2023
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$0
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$0
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.99%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$436,500
WELLS FARGO BANK NA · recorded Jul 5, 2023

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,911 (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.$468,180 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$390,150
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$78,030
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$459,000

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.53
97
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
64
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
31
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
41
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
36
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.169 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
CountyCONTRA COSTA
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.1978
Lot (acres)The size of the land the home sits on, from county records.0.06
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.No

Transaction History(6)

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
Rodeo Hills ElementaryC+
Elementary · Grades KG–5 · 0.5 mi
M
Carquinez Middle SchoolC
Middle · Grades 6–8 · 2.5 mi
H
John Swett High SchoolB-
High · Grades 9–12 · 2.5 mi

District: John Swett Unified School District

Neighborhood · ZIP 94572These 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.97
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 100.372

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.20%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.12%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.5%
PopulationHow many people live in this area.9,214
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,342 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$95,102
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$118,996
Average tempThe average temperature here across a full year.58°F
Annual precipHow much rain and melted snow falls here in a typical year.22 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.78%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

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

820 Mariposa Ave 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 95% of homes in Rodeo 94572
  • Among the highest price per square foot in Rodeo 94572
  • Among the smallest homes in Rodeo 94572
  • Among the smallest lots in Rodeo 94572
  • Older than 96% of homes in Contra Costa County

What homes are worth in Rodeo 94572

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

This home
$403K$900K

This home is worth more than 5% of homes in Rodeo 94572.

How it measures up in Rodeo 94572

The dot is this home. The mark in the middle is the typical home in Rodeo 94572.

Estimated value$432,235
CheaperTypical $670,763Pricier

Pricier than 5% of homes nearby

Price per ft²$844
CheaperTypical $436Pricier

Pricier than almost all homes nearby

Living area512 ft²
SmallerTypical 1,426 ft²Bigger

Smaller than almost all homes nearby

Lot size2,500 ft²
SmallerTypical 0.15 acBigger

Smaller than almost all homes nearby

Year built1939
OlderTypical 1973Newer

Newer than 18% of homes nearby

How 820 Mariposa Ave ranks against every home in each area.
MeasureThis homeRodeo 94572Contra Costa County
Estimated valuepricier than$432,2355% of homes9% of homes
Price per ft²pricier than$844almost all homes94% of homes
Living areabigger than512 ft²almost no homesalmost no homes
Lot sizebigger than2,500 ft²almost no homes14% of homes
Year builtnewer than193918% of homes4% of homes

About 820 Mariposa Ave

How much is 820 Mariposa Ave, Rodeo, CA worth?

The TopHap Estimate for 820 Mariposa Ave, Rodeo, CA is $432,235 as of Jul 14, 2026. The likely range is $417,664 to $446,806. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 820 Mariposa Ave, Rodeo, CA last sell?

820 Mariposa Ave, Rodeo, CA last sold on Jul 5, 2023 for $450,000, according to the county's recorded deed.

How big is 820 Mariposa Ave, Rodeo, CA?

820 Mariposa Ave, Rodeo, CA has 1 bedrooms, 2 bathrooms, 512 square feet of living space and a 0.06-acre lot.

When was 820 Mariposa Ave, Rodeo, CA built?

820 Mariposa Ave, Rodeo, CA was built in 1939, making it 87 years old. The building has 1 story.

What schools serve 820 Mariposa Ave, Rodeo, CA?

820 Mariposa Ave, Rodeo, CA is assigned to Rodeo Hills Elementary (elementary), rated C+; Carquinez Middle School (middle), rated C; John Swett High School (high), rated B-. All sit in John Swett Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 820 Mariposa Ave, Rodeo, CA compare to other homes in Rodeo 94572?

Among the 2,447 homes in Rodeo 94572, it is worth more than 5% of them ($432,235 against a typical $670,763), its price per square foot is higher than almost all of them ($844 against a typical $436), it is bigger than almost none of them (512 ft² against a typical 1,426 ft²), its lot is bigger than almost none of them (2,500 ft² against a typical 0.15 ac) and it is newer than 18% of them (1939 against a typical 1973). Measured against all of Contra Costa County, it is worth more than 9% 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 820 Mariposa Ave, Rodeo, CA?

The 2025 property tax bill for 820 Mariposa Ave, Rodeo, CA was $6,911. The county assessed it at $468,180.

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Assigned schools

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