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Single Family ResidenceResidential
$578,571$367 / 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 $220,000 on May 31, 1994

10646 PORTSMOUTH CT

RIVERSIDE, CA 92503
3
Beds
1.8
Baths
1,578 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.
0.28 ac
Lot SizeThe size of the land the home sits on, from county records.
1976
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
5
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$579K
$538K low$619K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$220,000 · May 31, 1994
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.$0
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$0
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.137%
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.$832,500
FINANCE OF AMERICA REVERSE LLC · 2.25% 2 · recorded Dec 13, 2021
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.$1
HUD-HOUSING/URBAN DEV

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,269 (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.$190,662 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$77,992
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$112,670
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$186,924
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$459,720

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Contemporary
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.1977
Lot (acres)The size of the land the home sits on, from county records.0.28
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.Yes

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.

M
Arizona Middle SchoolB-
Middle · Grades 6–8 · 0.6 mi
E
Orrenmaa Elementary SchoolC
Elementary · Grades KG–5 · 1.1 mi
H
Hillcrest High SchoolB+
High · Grades 9–12 · 1.6 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%

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

10646 Portsmouth 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 less than 65% of homes in La Sierra South
  • Costs more per square foot than 72% of homes in Riverside County
  • Has a bigger lot than 76% of homes in Riverside 92503
  • Older than 81% of homes in La Sierra South

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
$386K$1.1M

This home is worth more than 41% 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$578,571
CheaperTypical $598,202Pricier

Pricier than 41% of homes nearby

Price per ft²$367
CheaperTypical $382Pricier

Pricier than 44% of homes nearby

Living area1,578 ft²
SmallerTypical 1,540 ft²Bigger

Bigger than 53% of homes nearby

Lot size0.28 ac
SmallerTypical 0.19 acBigger

Bigger than 76% of homes nearby

Year built1976
OlderTypical 1978Newer

Newer than 42% of homes nearby

How 10646 Portsmouth Ct ranks against every home in each area.
MeasureThis homeLa Sierra SouthRiverside 92503Riverside County
Estimated valuepricier than$578,57135% of homes41% of homes49% of homes
Price per ft²pricier than$36745% of homes44% of homes72% of homes
Living areabigger than1,578 ft²56% of homes53% of homes38% of homes
Lot sizebigger than0.28 ac72% of homes76% of homes66% of homes
Year builtnewer than197619% of homes42% of homes22% of homes

About 10646 Portsmouth Ct

How much is 10646 Portsmouth Ct, Riverside, CA worth?

The TopHap Estimate for 10646 Portsmouth Ct, Riverside, CA is $578,571 as of Jul 14, 2026. The likely range is $537,869 to $619,273. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 10646 Portsmouth Ct, Riverside, CA last sell?

10646 Portsmouth Ct, Riverside, CA last sold on May 31, 1994 for $220,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 10646 Portsmouth Ct, Riverside, CA?

10646 Portsmouth Ct, Riverside, CA has 3 bedrooms, 1.8 bathrooms, 1,578 square feet of living space and a 0.28-acre lot.

When was 10646 Portsmouth Ct, Riverside, CA built?

10646 Portsmouth Ct, Riverside, CA was built in 1976, making it 50 years old. It is a contemporary home. The building has 1 story.

What schools serve 10646 Portsmouth Ct, Riverside, CA?

10646 Portsmouth Ct, Riverside, CA is assigned to Arizona Middle School (middle), rated B-; Orrenmaa Elementary School (elementary), rated C; Hillcrest High School (high), rated B+. All sit in Alvord Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 10646 Portsmouth Ct, Riverside, CA compare to other homes in Riverside 92503?

Among the 21,423 homes in Riverside 92503, it is worth more than 41% of them ($578,571 against a typical $598,202), its price per square foot is higher than 44% of them ($367 against a typical $382), it is bigger than 53% of them (1,578 ft² against a typical 1,540 ft²), its lot is bigger than 76% of them (0.28 ac against a typical 0.19 ac) and it is newer than 42% of them (1976 against a typical 1978). Measured against all of Riverside County, it is worth more than 49% 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 10646 Portsmouth Ct, Riverside, CA?

The 2025 property tax bill for 10646 Portsmouth Ct, Riverside, CA was $2,269. The county assessed it at $190,662.

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Assigned schools

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