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Single Family ResidenceResidential
$858,096$264 / 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 95How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026
Last sold for $594,500 on Feb 26, 2021

21135 MILL VALLEY CT

RIVERSIDE, CA 92507
0
Baths
3,245 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.
0.24 ac
Lot SizeThe size of the land the home sits on, from county records.
2021
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

$858K
$818K low$898K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$594,500 · Feb 26, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$11,277 (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.$656,274 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$138,010
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$518,264
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$643,406
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$599,850

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.42
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
97
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
66
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
10
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.

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
Lot (acres)The size of the land the home sits on, from county records.0.24
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
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(1)

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
Highgrove Elementary SchoolC-
Elementary · Grades KG–6 · 2.0 mi
M
University Heights Middle SchoolC+
Middle · Grades 7–8 · 2.7 mi
H
John W. North High SchoolC+
High · Grades 9–12 · 3.4 mi

District: Riverside Unified School District

Neighborhood · ZIP 92507These 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.112
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 100.450

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.95%
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.15%
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.64,491
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,078 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$66,160
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$82,952
Average tempThe average temperature here across a full year.63°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

21135 Mill Valley Ct 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 96% of homes in Riverside 92507
  • Costs less per square foot than 96% of homes in Riverside 92507
  • Bigger than 95% of homes in Riverside 92507
  • Has a bigger lot than 71% of homes in Riverside 92507
  • Newer than 95% of homes in Riverside County

What homes are worth in Riverside 92507

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

This home
$301K$921K

This home is worth more than 96% of homes in Riverside 92507.

How it measures up in Riverside 92507

The dot is this home. The mark in the middle is the typical home in Riverside 92507.

Estimated value$858,096
CheaperTypical $589,573Pricier

Pricier than 96% of homes nearby

Price per ft²$264
CheaperTypical $366Pricier

Pricier than 4% of homes nearby

Living area3,245 ft²
SmallerTypical 1,574 ft²Bigger

Bigger than 95% of homes nearby

Lot size0.24 ac
SmallerTypical 0.19 acBigger

Bigger than 71% of homes nearby

Year built2021
OlderTypical 1978Newer

Newer than 90% of homes nearby

How 21135 Mill Valley Ct ranks against every home in each area.
MeasureThis homeHighgroveRiverside 92507Riverside County
Estimated valuepricier than$858,09694% of homes96% of homes84% of homes
Price per ft²pricier than$2648% of homes4% of homes25% of homes
Living areabigger than3,245 ft²94% of homes95% of homes91% of homes
Lot sizebigger than0.24 ac69% of homes71% of homes62% of homes
Year builtnewer than202172% of homes90% of homes95% of homes

About 21135 Mill Valley Ct

How much is 21135 Mill Valley Ct, Riverside, CA worth?

The TopHap Estimate for 21135 Mill Valley Ct, Riverside, CA is $858,096 as of Sep 24, 2026. The likely range is $817,814 to $898,378. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21135 Mill Valley Ct, Riverside, CA last sell?

21135 Mill Valley Ct, Riverside, CA last sold on Feb 26, 2021 for $594,500, according to the county's recorded deed.

How big is 21135 Mill Valley Ct, Riverside, CA?

21135 Mill Valley Ct, Riverside, CA has 3,245 square feet of living space and a 0.24-acre lot.

When was 21135 Mill Valley Ct, Riverside, CA built?

21135 Mill Valley Ct, Riverside, CA was built in 2021, making it 5 years old. The building has 1 story.

What schools serve 21135 Mill Valley Ct, Riverside, CA?

21135 Mill Valley Ct, Riverside, CA is assigned to Highgrove Elementary School (elementary), rated C-; University Heights Middle School (middle), rated C+; John W. North High School (high), rated C+. All sit in Riverside Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21135 Mill Valley Ct, Riverside, CA compare to other homes in Riverside 92507?

Among the 12,285 homes in Riverside 92507, it is worth more than 96% of them ($858,096 against a typical $589,573), its price per square foot is higher than 4% of them ($264 against a typical $366), it is bigger than 95% of them (3,245 ft² against a typical 1,574 ft²), its lot is bigger than 71% of them (0.24 ac against a typical 0.19 ac) and it is newer than 90% of them (2021 against a typical 1978). Measured against all of Riverside County, it is worth more than 84% 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 21135 Mill Valley Ct, Riverside, CA?

The 2025 property tax bill for 21135 Mill Valley Ct, Riverside, CA was $11,277. The county assessed it at $656,274.

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