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Single Family ResidenceResidential
$395,311$279 / 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 93How 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 $102,000 on Oct 28, 2003

821 MARIPOSA AVE

RODEO, CA 94572
3
Beds
2.5
Baths
1,416 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.
1936
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.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$395K
$368K low$423K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$102,000 · Oct 28, 2003
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.$166,311
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$133,049
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.57%
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.$203,000
FIELDSTONE MORTGAGE CO · recorded Oct 28, 2003
2nd 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.$26,000
GREENPOINT MORTGAGE FUNDING

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,981 (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.$238,204 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$138,314
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$99,890
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$233,534

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.48
97
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
38
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.150 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%
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
Lot (acres)The size of the land the home sits on, from county records.0.14
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(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.

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 · 2.6 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

821 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 98% of homes in Rodeo 94572
  • Costs less per square foot than 98% of homes in Rodeo 94572
  • Smaller than 68% of homes in Contra Costa County
  • Older than 97% 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
$397K$886K

This home is worth more than 2% 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$395,311
CheaperTypical $669,756Pricier

Pricier than 2% of homes nearby

Price per ft²$279
CheaperTypical $437Pricier

Pricier than 2% of homes nearby

Living area1,416 ft²
SmallerTypical 1,429 ft²Bigger

Bigger than 48% of homes nearby

Lot size0.14 ac
SmallerTypical 0.15 acBigger

Bigger than 39% of homes nearby

Year built1936
OlderTypical 1973Newer

Newer than 14% of homes nearby

How 821 Mariposa Ave ranks against every home in each area.
MeasureThis homeRodeo 94572Contra Costa County
Estimated valuepricier than$395,3112% of homes6% of homes
Price per ft²pricier than$2792% of homes6% of homes
Living areabigger than1,416 ft²48% of homes32% of homes
Lot sizebigger than0.14 ac39% of homes45% of homes
Year builtnewer than193614% of homes3% of homes

About 821 Mariposa Ave

How much is 821 Mariposa Ave, Rodeo, CA worth?

The TopHap Estimate for 821 Mariposa Ave, Rodeo, CA is $395,311 as of Jul 14, 2026. The likely range is $367,828 to $422,794. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 821 Mariposa Ave, Rodeo, CA last sell?

821 Mariposa Ave, Rodeo, CA last sold on Oct 28, 2003 for $102,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 821 Mariposa Ave, Rodeo, CA?

821 Mariposa Ave, Rodeo, CA has 3 bedrooms, 2.5 bathrooms, 1,416 square feet of living space and a 0.14-acre lot.

When was 821 Mariposa Ave, Rodeo, CA built?

821 Mariposa Ave, Rodeo, CA was built in 1936, making it 90 years old. The building has 1 story.

What schools serve 821 Mariposa Ave, Rodeo, CA?

821 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 821 Mariposa Ave, Rodeo, CA compare to other homes in Rodeo 94572?

Among the 2,447 homes in Rodeo 94572, it is worth more than 2% of them ($395,311 against a typical $669,756), its price per square foot is higher than 2% of them ($279 against a typical $437), it is bigger than 48% of them (1,416 ft² against a typical 1,429 ft²), its lot is bigger than 39% of them (0.14 ac against a typical 0.15 ac) and it is newer than 14% of them (1936 against a typical 1973). 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 821 Mariposa Ave, Rodeo, CA?

The 2025 property tax bill for 821 Mariposa Ave, Rodeo, CA was $5,981. The county assessed it at $238,204.

Closest homes

More homes in Rodeo 94572

Assigned schools

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