Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$537,114$407 / 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 87How 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 $525,000 on Sep 26, 2025

6640 MOUNT DIABLO AVE

RIVERSIDE, CA 92506
3
Beds
1.8
Baths
1,319 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.
0.2 ac
Lot SizeThe size of the land the home sits on, from county records.
1952
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

$537K
$470K low$605K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$525,000 · Sep 26, 2025
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.$143,364
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$114,691
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.73%
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.$393,750
SECURE CHOICE LENDING · recorded Sep 26, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,757 (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.$525,000 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$157,501
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$367,499
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$152,336
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$577,260

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.0.20
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.Wood Shingle
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, Detached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(3)

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
Pachappa Elementary SchoolB-
Elementary · Grades KG–6 · 0.6 mi
H
Poly High SchoolB
High · Grades 9–12 · 1.3 mi
M
Central Middle School of Arts and InnovationC-
Middle · Grades 7–8 · 1.7 mi

District: Riverside Unified School District

Neighborhood · ZIP 92506These 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.65
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.104
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.350

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.22%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.4%
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.47,695
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,910 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$109,200
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$137,774
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%

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

6640 Mount Diablo 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 less than 89% of homes in Riverside 92506
  • Costs more per square foot than 82% of homes in Riverside County
  • Smaller than 78% of homes in Riverside 92506
  • Has a bigger lot than 73% of homes in Magnolia Center
  • Older than 95% of homes in Riverside County

What homes are worth in Riverside 92506

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

This home
$444K$1.8M

This home is worth more than 11% of homes in Riverside 92506.

How it measures up in Riverside 92506

The dot is this home. The mark in the middle is the typical home in Riverside 92506.

Estimated value$537,114
CheaperTypical $700,304Pricier

Pricier than 11% of homes nearby

Price per ft²$407
CheaperTypical $390Pricier

Pricier than 58% of homes nearby

Living area1,319 ft²
SmallerTypical 1,813 ft²Bigger

Bigger than 22% of homes nearby

Lot size0.2 ac
SmallerTypical 0.24 acBigger

Bigger than 39% of homes nearby

Year built1952
OlderTypical 1965Newer

Newer than 27% of homes nearby

How 6640 Mount Diablo Ave ranks against every home in each area.
MeasureThis homeMagnolia CenterRiverside 92506Riverside County
Estimated valuepricier than$537,11430% of homes11% of homes40% of homes
Price per ft²pricier than$40733% of homes58% of homes82% of homes
Living areabigger than1,319 ft²53% of homes22% of homes22% of homes
Lot sizebigger than0.2 ac73% of homes39% of homes53% of homes
Year builtnewer than195247% of homes27% of homes5% of homes

About 6640 Mount Diablo Ave

How much is 6640 Mount Diablo Ave, Riverside, CA worth?

The TopHap Estimate for 6640 Mount Diablo Ave, Riverside, CA is $537,114 as of Jul 14, 2026. The likely range is $469,550 to $604,678. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 6640 Mount Diablo Ave, Riverside, CA last sell?

6640 Mount Diablo Ave, Riverside, CA last sold on Sep 26, 2025 for $525,000, according to the county's recorded deed.

How big is 6640 Mount Diablo Ave, Riverside, CA?

6640 Mount Diablo Ave, Riverside, CA has 3 bedrooms, 1.8 bathrooms, 1,319 square feet of living space and a 0.20-acre lot.

When was 6640 Mount Diablo Ave, Riverside, CA built?

6640 Mount Diablo Ave, Riverside, CA was built in 1952, making it 74 years old. The building has 1 story.

What schools serve 6640 Mount Diablo Ave, Riverside, CA?

6640 Mount Diablo Ave, Riverside, CA is assigned to Pachappa Elementary School (elementary), rated B-; Poly High School (high), rated B; Central Middle School of Arts and Innovation (middle), rated C-. All sit in Riverside Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 6640 Mount Diablo Ave, Riverside, CA compare to other homes in Riverside 92506?

Among the 14,877 homes in Riverside 92506, it is worth more than 11% of them ($537,114 against a typical $700,304), its price per square foot is higher than 58% of them ($407 against a typical $390), it is bigger than 22% of them (1,319 ft² against a typical 1,813 ft²), its lot is bigger than 39% of them (0.2 ac against a typical 0.24 ac) and it is newer than 27% of them (1952 against a typical 1965). Measured against all of Riverside County, it is worth more than 40% 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 6640 Mount Diablo Ave, Riverside, CA?

The 2025 property tax bill for 6640 Mount Diablo Ave, Riverside, CA was $1,757. The county assessed it at $525,000.

Closest homes

More homes in Riverside 92506

Assigned schools

Explore the area

See this home in context

Open 6640 Mount Diablo Ave on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map