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Single Family ResidenceResidential
$1,350,000$304 / 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 90How 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 $545,000 on Dec 5, 2012

16858 MARIPOSA AVE

RIVERSIDE, CA 92504
5
Beds
4.3
Baths
4,440 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.
1.09 ac
Lot SizeThe size of the land the home sits on, from county records.
2012
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
4
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.4M
$1.2M low$1.5M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$545,000 · Dec 5, 2012
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.$883,000
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$706,400
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.35%
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.$417,000
PARAMOUNT RESIDENTIAL MORTGAGE GROU · recorded Dec 5, 2012
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.$50,000
DIGITAL FCU

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,987 (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.$739,801 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$188,398
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$551,403
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$725,296
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,080,900

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.46
36
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
86
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
64
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
6
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
39
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.7 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.minimal

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
CountyRIVERSIDE
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Tile
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
FireplaceWhether the home has a fireplace, and what kind.Yes
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
ViewThe type of view from the property, or another feature of the site that affects value.Waterfront

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
Woodcrest Elementary SchoolB+
Elementary · Grades KG–6 · 0.6 mi
M
Frank Augustus Miller Middle SchoolA-
Middle · Grades 7–8 · 1.2 mi
H
Martin Luther King High SchoolA
High · Grades 9–12 · 2.1 mi

District: Riverside Unified School District

Neighborhood · ZIP 92504These 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.90
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.105
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.307

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.15%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.9.4%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.7%
PopulationHow many people live in this area.56,759
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,438 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$79,931
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$102,916
Average tempThe average temperature here across a full year.64°F
Annual precipHow much rain and melted snow falls here in a typical year.11 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.68%

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

16858 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 more than 98% of homes in Riverside 92504
  • Costs less per square foot than 87% of homes in Riverside 92504
  • Bigger than 98% of homes in Riverside County
  • Has a bigger lot than 87% of homes in Riverside 92504
  • Newer than 96% of homes in Riverside 92504

What homes are worth in Riverside 92504

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

This home
$390K$1.3M

This home is worth more than 98% of homes in Riverside 92504.

How it measures up in Riverside 92504

The dot is this home. The mark in the middle is the typical home in Riverside 92504.

Estimated value$1,350,000
CheaperTypical $599,250Pricier

Pricier than 98% of homes nearby

Price per ft²$304
CheaperTypical $415Pricier

Pricier than 13% of homes nearby

Living area4,440 ft²
SmallerTypical 1,412 ft²Bigger

Bigger than 97% of homes nearby

Lot size1.09 ac
SmallerTypical 0.19 acBigger

Bigger than 87% of homes nearby

Year built2012
OlderTypical 1960Newer

Newer than 96% of homes nearby

How 16858 Mariposa Ave ranks against every home in each area.
MeasureThis homeWoodcrestRiverside 92504Riverside County
Estimated valuepricier than$1,350,00096% of homes98% of homes97% of homes
Price per ft²pricier than$30441% of homes13% of homes47% of homes
Living areabigger than4,440 ft²93% of homes97% of homes98% of homes
Lot sizebigger than1.09 ac75% of homes87% of homes85% of homes
Year builtnewer than201275% of homes96% of homes88% of homes

About 16858 Mariposa Ave

How much is 16858 Mariposa Ave, Riverside, CA worth?

The TopHap Estimate for 16858 Mariposa Ave, Riverside, CA is $1,350,000 as of Jul 14, 2026. The likely range is $1,210,924 to $1,489,076. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 16858 Mariposa Ave, Riverside, CA last sell?

16858 Mariposa Ave, Riverside, CA last sold on Dec 5, 2012 for $545,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 16858 Mariposa Ave, Riverside, CA?

16858 Mariposa Ave, Riverside, CA has 5 bedrooms, 4.3 bathrooms and 4,440 square feet of living space.

When was 16858 Mariposa Ave, Riverside, CA built?

16858 Mariposa Ave, Riverside, CA was built in 2012, making it 14 years old. The building has 2 stories.

What schools serve 16858 Mariposa Ave, Riverside, CA?

16858 Mariposa Ave, Riverside, CA is assigned to Woodcrest Elementary School (elementary), rated B+; Frank Augustus Miller Middle School (middle), rated A-; Martin Luther King High School (high), rated A. All sit in Riverside Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 16858 Mariposa Ave, Riverside, CA compare to other homes in Riverside 92504?

Among the 13,368 homes in Riverside 92504, it is worth more than 98% of them ($1,350,000 against a typical $599,250), its price per square foot is higher than 13% of them ($304 against a typical $415), it is bigger than 97% of them (4,440 ft² against a typical 1,412 ft²), its lot is bigger than 87% of them (1.09 ac against a typical 0.19 ac) and it is newer than 96% of them (2012 against a typical 1960). Measured against all of Riverside County, it is worth more than 97% 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 16858 Mariposa Ave, Riverside, CA?

The 2025 property tax bill for 16858 Mariposa Ave, Riverside, CA was $7,987. The county assessed it at $739,801.

More homes on Mariposa Ave

Closest homes

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Assigned schools

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