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Single Family ResidenceResidential
$602,146$354 / 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 Jul 14, 2026
Last sold for $600,000 on Dec 18, 2020

18540 MARKHAM ST

RIVERSIDE, CA 92508
3
Beds
1.8
Baths
1,700 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.
5.04 ac
Lot SizeThe size of the land the home sits on, from county records.
1973
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$602K
$555K low$650K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$600,000 · Dec 18, 2020
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.$122,146
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$97,717
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.65%
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.$480,000
UNITED WHOLESALE MORTGAGE LLC · recorded Dec 18, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,258 (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.$662,446 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$110,406
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$552,040
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$649,458
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$518,670

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.13 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyRIVERSIDE
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.No

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
Frank Augustus Miller Middle SchoolA-
Middle · Grades 7–8 · 1.5 mi
E
Mark Twain Elementary SchoolB
Elementary · Grades KG–6 · 1.7 mi
H
Martin Luther King High SchoolA
High · Grades 9–12 · 1.7 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

18540 Markham St 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 92508
  • Costs more per square foot than 71% of homes in Riverside 92508
  • Smaller than 82% of homes in Riverside 92508
  • Among the largest lots in Riverside 92508
  • Older than 96% 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
$444K$1.2M

This home is worth more than 11% 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$602,146
CheaperTypical $719,748Pricier

Pricier than 11% of homes nearby

Price per ft²$354
CheaperTypical $307Pricier

Pricier than 71% of homes nearby

Living area1,700 ft²
SmallerTypical 2,418 ft²Bigger

Bigger than 18% of homes nearby

Lot size5.04 ac
SmallerTypical 0.2 acBigger

Bigger than almost all homes nearby

Year built1973
OlderTypical 1999Newer

Newer than 4% of homes nearby

How 18540 Markham St ranks against every home in each area.
MeasureThis homeWoodcrestRiverside 92508Riverside County
Estimated valuepricier than$602,14614% of homes11% of homes55% of homes
Price per ft²pricier than$35470% of homes71% of homes68% of homes
Living areabigger than1,700 ft²20% of homes18% of homes44% of homes
Lot sizebigger than5.04 ac95% of homesalmost all homes96% of homes
Year builtnewer than197313% of homes4% of homes19% of homes

About 18540 Markham St

How much is 18540 Markham St, Riverside, CA worth?

The TopHap Estimate for 18540 Markham St, Riverside, CA is $602,146 as of Jul 14, 2026. The likely range is $554,661 to $649,631. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18540 Markham St, Riverside, CA last sell?

18540 Markham St, Riverside, CA last sold on Dec 18, 2020 for $600,000, according to the county's recorded deed.

How big is 18540 Markham St, Riverside, CA?

18540 Markham St, Riverside, CA has 3 bedrooms, 1.8 bathrooms and 1,700 square feet of living space.

When was 18540 Markham St, Riverside, CA built?

18540 Markham St, Riverside, CA was built in 1973, making it 53 years old. The building has 1 story.

What schools serve 18540 Markham St, Riverside, CA?

18540 Markham St, Riverside, CA is assigned to Frank Augustus Miller Middle School (middle), rated A-; Mark Twain Elementary School (elementary), rated B; Martin Luther King High School (high), rated A. All sit in Riverside Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 18540 Markham St, Riverside, CA compare to other homes in Riverside 92508?

Among the 10,165 homes in Riverside 92508, it is worth more than 11% of them ($602,146 against a typical $719,748), its price per square foot is higher than 71% of them ($354 against a typical $307), it is bigger than 18% of them (1,700 ft² against a typical 2,418 ft²), its lot is bigger than almost all of them (5.04 ac against a typical 0.2 ac) and it is newer than 4% of them (1973 against a typical 1999). Measured against all of Riverside County, it is worth more than 55% 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 18540 Markham St, Riverside, CA?

The 2025 property tax bill for 18540 Markham St, Riverside, CA was $7,258. The county assessed it at $662,446.

Closest homes

More homes in Riverside 92508

Assigned schools

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