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Single Family ResidenceResidential
$632,334$341 / 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 98How 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 $127,000 on Apr 8, 1998

18640 BOULDER AVE

RIVERSIDE, CA 92508
3
Beds
1.8
Baths
1,856 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.
0.43 ac
Lot SizeThe size of the land the home sits on, from county records.
1983
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
6
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

$632K
$619K low$645K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$127,000 · Apr 8, 1998
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.$357,334
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$285,867
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.40%
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.$225,000
GMAC MORTGAGE CORP · recorded Jan 2, 2004
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.$50,000
IRWIN UNION BANK & TRUST CO

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,153 (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.$571,521 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$119,066
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$452,455
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$560,316
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$455,400

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.1984
Lot (acres)The size of the land the home sits on, from county records.0.43
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(5)

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
Frank Augustus Miller Middle SchoolA-
Middle · Grades 7–8 · 0.9 mi
H
Martin Luther King High SchoolA
High · Grades 9–12 · 0.9 mi
E
Mark Twain Elementary SchoolB
Elementary · Grades KG–6 · 1.0 mi

District: Riverside Unified School District

Neighborhood · ZIP 92508These 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.26
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.107
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.315

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.19%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.6%
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.37,730
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,323 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$128,856
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$155,505
Average tempThe average temperature here across a full year.63°F
Annual precipHow much rain and melted snow falls here in a typical year.13 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

18640 Boulder 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 82% of homes in Riverside 92508
  • Costs more per square foot than 66% of homes in Riverside 92508
  • Smaller than 75% of homes in Woodcrest
  • Has a bigger lot than 80% of homes in Riverside 92508
  • Older than 91% of homes in Riverside 92508

What homes are worth in Riverside 92508

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

This home
$428K$1.2M

This home is worth more than 18% of homes in Riverside 92508.

How it measures up in Riverside 92508

The dot is this home. The mark in the middle is the typical home in Riverside 92508.

Estimated value$632,334
CheaperTypical $718,283Pricier

Pricier than 18% of homes nearby

Price per ft²$341
CheaperTypical $307Pricier

Pricier than 66% of homes nearby

Living area1,856 ft²
SmallerTypical 2,428 ft²Bigger

Bigger than 26% of homes nearby

Lot size0.43 ac
SmallerTypical 0.2 acBigger

Bigger than 80% of homes nearby

Year built1983
OlderTypical 1999Newer

Newer than 9% of homes nearby

How 18640 Boulder Ave ranks against every home in each area.
MeasureThis homeWoodcrestRiverside 92508Riverside County
Estimated valuepricier than$632,33419% of homes18% of homes61% of homes
Price per ft²pricier than$34162% of homes66% of homes63% of homes
Living areabigger than1,856 ft²25% of homes26% of homes53% of homes
Lot sizebigger than0.43 ac31% of homes80% of homes74% of homes
Year builtnewer than198334% of homes9% of homes32% of homes

About 18640 Boulder Ave

How much is 18640 Boulder Ave, Riverside, CA worth?

The TopHap Estimate for 18640 Boulder Ave, Riverside, CA is $632,334 as of Jul 14, 2026. The likely range is $619,225 to $645,443. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18640 Boulder Ave, Riverside, CA last sell?

18640 Boulder Ave, Riverside, CA last sold on Apr 8, 1998 for $127,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 18640 Boulder Ave, Riverside, CA?

18640 Boulder Ave, Riverside, CA has 3 bedrooms, 1.8 bathrooms, 1,856 square feet of living space and a 0.43-acre lot.

When was 18640 Boulder Ave, Riverside, CA built?

18640 Boulder Ave, Riverside, CA was built in 1983, making it 43 years old. It is a contemporary home. The building has 1 story.

What schools serve 18640 Boulder Ave, Riverside, CA?

18640 Boulder Ave, Riverside, CA is assigned to Frank Augustus Miller Middle School (middle), rated A-; Martin Luther King High School (high), rated A; Mark Twain Elementary School (elementary), rated B. All sit in Riverside Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 18640 Boulder Ave, Riverside, CA compare to other homes in Riverside 92508?

Among the 10,165 homes in Riverside 92508, it is worth more than 18% of them ($632,334 against a typical $718,283), its price per square foot is higher than 66% of them ($341 against a typical $307), it is bigger than 26% of them (1,856 ft² against a typical 2,428 ft²), its lot is bigger than 80% of them (0.43 ac against a typical 0.2 ac) and it is newer than 9% of them (1983 against a typical 1999). Measured against all of Riverside County, it is worth more than 61% 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 18640 Boulder Ave, Riverside, CA?

The 2025 property tax bill for 18640 Boulder Ave, Riverside, CA was $6,153. The county assessed it at $571,521.

More homes on Boulder Ave

Closest homes

More homes in Riverside 92508

Assigned schools

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