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Single Family ResidenceResidential
$667,211$360 / 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 94How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026

4138 MARIPOSA AVE

RIVERSIDE, CA 92503
3
Beds
2.5
Baths
1,854 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.
0.44 ac
Lot SizeThe size of the land the home sits on, from county records.
1984
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$667K
$624K low$710K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,626 (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.$552,038 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$162,364
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$389,674
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$541,215
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$439,650

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyRIVERSIDE
Lot (acres)The size of the land the home sits on, from county records.0.44
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.Rock / Gravel
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.No

Transaction History(2)

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
Myra Linn Elementary SchoolC
Elementary · Grades KG–5 · 0.5 mi
H
La Sierra High SchoolC-
High · Grades 9–12 · 1.1 mi
M
Arizona Middle SchoolB-
Middle · Grades 6–8 · 1.9 mi

District: Alvord Unified School District

Neighborhood · ZIP 92503These 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.57
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 100.290

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.14%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.9.5%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.8%
PopulationHow many people live in this area.96,024
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,949 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$87,069
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$109,138
Average tempThe average temperature here across a full year.64°F
Annual precipHow much rain and melted snow falls here in a typical year.12 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.68%

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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

4138 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 94% of homes in Arlington
  • Costs less per square foot than 75% of homes in Arlington
  • Bigger than 87% of homes in Arlington
  • Has a bigger lot than 89% of homes in Arlington
  • Newer than 85% of homes in Arlington

What homes are worth in Riverside 92503

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

This home
$399K$1.2M

This home is worth more than 68% of homes in Riverside 92503.

How it measures up in Riverside 92503

The dot is this home. The mark in the middle is the typical home in Riverside 92503.

Estimated value$667,211
CheaperTypical $592,256Pricier

Pricier than 68% of homes nearby

Price per ft²$360
CheaperTypical $374Pricier

Pricier than 44% of homes nearby

Living area1,854 ft²
SmallerTypical 1,540 ft²Bigger

Bigger than 65% of homes nearby

Lot size0.44 ac
SmallerTypical 0.19 acBigger

Bigger than 86% of homes nearby

Year built1984
OlderTypical 1978Newer

Newer than 57% of homes nearby

How 4138 Mariposa Ave ranks against every home in each area.
MeasureThis homeArlingtonRiverside 92503Riverside County
Estimated valuepricier than$667,21194% of homes68% of homes66% of homes
Price per ft²pricier than$36025% of homes44% of homes70% of homes
Living areabigger than1,854 ft²87% of homes65% of homes52% of homes
Lot sizebigger than0.44 ac89% of homes86% of homes74% of homes
Year builtnewer than198485% of homes57% of homes34% of homes

About 4138 Mariposa Ave

How much is 4138 Mariposa Ave, Riverside, CA worth?

The TopHap Estimate for 4138 Mariposa Ave, Riverside, CA is $667,211 as of Aug 30, 2026. The likely range is $624,347 to $710,075. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4138 Mariposa Ave, Riverside, CA last sell?

4138 Mariposa Ave, Riverside, CA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 4138 Mariposa Ave, Riverside, CA?

4138 Mariposa Ave, Riverside, CA has 3 bedrooms, 2.5 bathrooms, 1,854 square feet of living space and a 0.44-acre lot.

When was 4138 Mariposa Ave, Riverside, CA built?

4138 Mariposa Ave, Riverside, CA was built in 1984, making it 42 years old. The building has 1 story.

What schools serve 4138 Mariposa Ave, Riverside, CA?

4138 Mariposa Ave, Riverside, CA is assigned to Myra Linn Elementary School (elementary), rated C; La Sierra High School (high), rated C-; Arizona Middle School (middle), rated B-. All sit in Alvord Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4138 Mariposa Ave, Riverside, CA compare to other homes in Riverside 92503?

Among the 21,420 homes in Riverside 92503, it is worth more than 68% of them ($667,211 against a typical $592,256), its price per square foot is higher than 44% of them ($360 against a typical $374), it is bigger than 65% of them (1,854 ft² against a typical 1,540 ft²), its lot is bigger than 86% of them (0.44 ac against a typical 0.19 ac) and it is newer than 57% of them (1984 against a typical 1978). Measured against all of Riverside County, it is worth more than 66% 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 4138 Mariposa Ave, Riverside, CA?

The 2025 property tax bill for 4138 Mariposa Ave, Riverside, CA was $6,626. The county assessed it at $552,038.

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