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Single Family ResidenceResidential
$2,680,000$294 / 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 92How 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 $1,200,000 on Sep 28, 2026

20455 SOMMA DR

RIVERSIDE, CA 92504
10
Beds
7.5
Baths
9,122 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.
4.48 ac
Lot SizeThe size of the land the home sits on, from county records.
1990
Year BuiltThe year the home was originally built, according to county records.
3
StoriesHow many floors the home has above ground.
11
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$2.7M
$2.5M low$2.9M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,200,000 · Sep 28, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$16,114 (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.$1,450,427 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$325,091
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$1,125,336
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,421,988
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,867,680

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyRIVERSIDE
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.1991
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

Transaction History(4)

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.

M
El Cerrito Middle SchoolB
Middle · Grades 7–8 · 6.8 mi
E
Woodrow Wilson Elementary SchoolA
Elementary · Grades KG–6 · 7.5 mi
H
Santiago High SchoolA
High · Grades 9–12 · 7.9 mi

District: Corona-Norco 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%

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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

20455 Somma Dr 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.

  • Among the most valuable homes in Lake Mathews
  • Costs less per square foot than 93% of homes in Riverside 92504
  • Among the largest homes in Lake Mathews
  • Has a bigger lot than 97% of homes in Riverside 92504
  • Newer than 85% 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
$376K$1.5M

This home is worth more than almost all 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$2,680,000
CheaperTypical $577,290Pricier

Pricier than almost all homes nearby

Price per ft²$294
CheaperTypical $403Pricier

Pricier than 7% of homes nearby

Living area9,122 ft²
SmallerTypical 1,412 ft²Bigger

Bigger than almost all homes nearby

Lot size4.48 ac
SmallerTypical 0.19 acBigger

Bigger than 97% of homes nearby

Year built1990
OlderTypical 1960Newer

Newer than 85% of homes nearby

How 20455 Somma Dr ranks against every home in each area.
MeasureThis homeLake MathewsRiverside 92504Riverside County
Estimated valuepricier than$2,680,000almost all homesalmost all homesalmost all homes
Price per ft²pricier than$29412% of homes7% of homes39% of homes
Living areabigger than9,122 ft²almost all homesalmost all homesalmost all homes
Lot sizebigger than4.48 ac90% of homes97% of homes95% of homes
Year builtnewer than199071% of homes85% of homes50% of homes

About 20455 Somma Dr

How much is 20455 Somma Dr, Riverside, CA worth?

The TopHap Estimate for 20455 Somma Dr, Riverside, CA is $2,680,000 as of Sep 24, 2026. The likely range is $2,456,145 to $2,903,855. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20455 Somma Dr, Riverside, CA last sell?

20455 Somma Dr, Riverside, CA last sold on Sep 28, 2026 for $1,200,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 20455 Somma Dr, Riverside, CA?

20455 Somma Dr, Riverside, CA has 10 bedrooms, 7.5 bathrooms and 9,122 square feet of living space.

When was 20455 Somma Dr, Riverside, CA built?

20455 Somma Dr, Riverside, CA was built in 1990, making it 36 years old. The building has 3 stories.

What schools serve 20455 Somma Dr, Riverside, CA?

20455 Somma Dr, Riverside, CA is assigned to El Cerrito Middle School (middle), rated B; Woodrow Wilson Elementary School (elementary), rated A; Santiago High School (high), rated A. All sit in Corona-Norco Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 20455 Somma Dr, Riverside, CA compare to other homes in Riverside 92504?

Among the 13,364 homes in Riverside 92504, it is worth more than almost all of them ($2,680,000 against a typical $577,290), its price per square foot is higher than 7% of them ($294 against a typical $403), it is bigger than almost all of them (9,122 ft² against a typical 1,412 ft²), its lot is bigger than 97% of them (4.48 ac against a typical 0.19 ac) and it is newer than 85% of them (1990 against a typical 1960). Measured against all of Riverside County, it is worth more than almost all 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 20455 Somma Dr, Riverside, CA?

The 2025 property tax bill for 20455 Somma Dr, Riverside, CA was $16,114. The county assessed it at $1,450,427.

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Assigned schools

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