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Single Family ResidenceResidential
$554,098$458 / 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 Sep 24, 2026

6421 SIAMESE PL

RIVERSIDE, CA 92505
3
Beds
2
Baths
1,209 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.
0.21 ac
Lot SizeThe size of the land the home sits on, from county records.
1985
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$554K
$519K low$589K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,247 (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.$188,855 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$54,816
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$134,039
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$185,153
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$553,950

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.0.21
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.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.

M
Loma Vista Middle SchoolC-
Middle · Grades 6–8 · 0.2 mi
E
Twinhill Elementary SchoolC+
Elementary · Grades KG–5 · 1.0 mi
H
Norte Vista High SchoolC-
High · Grades 9–12 · 1.8 mi

District: Alvord Unified School District

Neighborhood · ZIP 92505These 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.68
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.108
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.296

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.8.9%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.9%
PopulationHow many people live in this area.53,012
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.4,326 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$74,440
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$96,650
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

6421 Siamese Pl 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 82% of homes in La Sierra Hills
  • Costs more per square foot than 90% of homes in Riverside County
  • Smaller than 85% of homes in Riverside County
  • Newer than 68% of homes in La Sierra Hills

What homes are worth in Riverside 92505

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

This home
$324K$995K

This home is worth more than 31% of homes in Riverside 92505.

How it measures up in Riverside 92505

The dot is this home. The mark in the middle is the typical home in Riverside 92505.

Estimated value$554,098
CheaperTypical $598,658Pricier

Pricier than 31% of homes nearby

Price per ft²$458
CheaperTypical $389Pricier

Pricier than 81% of homes nearby

Living area1,209 ft²
SmallerTypical 1,516 ft²Bigger

Bigger than 24% of homes nearby

Lot size0.21 ac
SmallerTypical 0.19 acBigger

Bigger than 58% of homes nearby

Year built1985
OlderTypical 1977Newer

Newer than 68% of homes nearby

How 6421 Siamese Pl ranks against every home in each area.
MeasureThis homeLa Sierra HillsRiverside 92505Riverside County
Estimated valuepricier than$554,09818% of homes31% of homes42% of homes
Price per ft²pricier than$45880% of homes81% of homes90% of homes
Living areabigger than1,209 ft²19% of homes24% of homes15% of homes
Lot sizebigger than0.21 ac54% of homes58% of homes56% of homes
Year builtnewer than198568% of homes68% of homes36% of homes

About 6421 Siamese Pl

How much is 6421 Siamese Pl, Riverside, CA worth?

The TopHap Estimate for 6421 Siamese Pl, Riverside, CA is $554,098 as of Sep 24, 2026. The likely range is $518,894 to $589,302. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 6421 Siamese Pl, Riverside, CA last sell?

6421 Siamese Pl, Riverside, CA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 6421 Siamese Pl, Riverside, CA?

6421 Siamese Pl, Riverside, CA has 3 bedrooms, 2 bathrooms, 1,209 square feet of living space and a 0.21-acre lot.

When was 6421 Siamese Pl, Riverside, CA built?

6421 Siamese Pl, Riverside, CA was built in 1985, making it 41 years old. The building has 1 story.

What schools serve 6421 Siamese Pl, Riverside, CA?

6421 Siamese Pl, Riverside, CA is assigned to Loma Vista Middle School (middle), rated C-; Twinhill Elementary School (elementary), rated C+; Norte Vista High School (high), rated C-. All sit in Alvord Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 6421 Siamese Pl, Riverside, CA compare to other homes in Riverside 92505?

Among the 10,244 homes in Riverside 92505, it is worth more than 31% of them ($554,098 against a typical $598,658), its price per square foot is higher than 81% of them ($458 against a typical $389), it is bigger than 24% of them (1,209 ft² against a typical 1,516 ft²), its lot is bigger than 58% of them (0.21 ac against a typical 0.19 ac) and it is newer than 68% of them (1985 against a typical 1977). Measured against all of Riverside County, it is worth more than 42% 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 6421 Siamese Pl, Riverside, CA?

The 2025 property tax bill for 6421 Siamese Pl, Riverside, CA was $2,247. The county assessed it at $188,855.

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