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Single Family ResidenceResidential
$512,049$382 / 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 Aug 30, 2026
Last sold for $122,000 on Aug 13, 1999

3977 SAN MARCOS AVE

RIVERSIDE, CA 92504
3
Beds
1.8
Baths
1,341 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.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$512K
$480K low$544K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$122,000 · Aug 13, 1999

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,147 (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.$191,227 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$54,852
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$136,375
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$187,478
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$378,900

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(10)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Foreclosure Filings(1)

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

H
Ramona High SchoolC
High · Grades 9–12 · 0.3 mi
M
Sierra Middle SchoolC
Middle · Grades 7–8 · 0.6 mi
E
Thomas Jefferson Elementary SchoolC
Elementary · Grades KG–6 · 0.6 mi

District: Riverside Unified School District

Neighborhood · ZIP 92504These 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.90
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 100.307

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.9.4%
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.56,759
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,438 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$79,931
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$102,916
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%

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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

3977 San Marcos 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 78% of homes in Riverside 92504
  • Costs less per square foot than 76% of homes in Ramona - Riverside
  • Smaller than 77% of homes in Riverside County
  • Has a bigger lot than 78% of homes in Ramona - Riverside
  • Older than 95% of homes in Riverside County

What homes are worth in Riverside 92504

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

This home
$385K$1.4M

This home is worth more than 22% of homes in Riverside 92504.

How it measures up in Riverside 92504

The dot is this home. The mark in the middle is the typical home in Riverside 92504.

Estimated value$512,049
CheaperTypical $579,359Pricier

Pricier than 22% of homes nearby

Price per ft²$382
CheaperTypical $405Pricier

Pricier than 39% of homes nearby

Living area1,341 ft²
SmallerTypical 1,421 ft²Bigger

Bigger than 44% of homes nearby

Lot size0.2 ac
SmallerTypical 0.19 acBigger

Bigger than 55% of homes nearby

Year built1952
OlderTypical 1960Newer

Newer than 18% of homes nearby

How 3977 San Marcos Ave ranks against every home in each area.
MeasureThis homeRamona - RiversideRiverside 92504Riverside County
Estimated valuepricier than$512,04930% of homes22% of homes36% of homes
Price per ft²pricier than$38224% of homes39% of homes76% of homes
Living areabigger than1,341 ft²64% of homes44% of homes23% of homes
Lot sizebigger than0.2 ac78% of homes55% of homes54% of homes
Year builtnewer than195216% of homes18% of homes5% of homes

About 3977 San Marcos Ave

How much is 3977 San Marcos Ave, Riverside, CA worth?

The TopHap Estimate for 3977 San Marcos Ave, Riverside, CA is $512,049 as of Aug 30, 2026. The likely range is $479,668 to $544,430. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 3977 San Marcos Ave, Riverside, CA last sell?

3977 San Marcos Ave, Riverside, CA last sold on Aug 13, 1999 for $122,000, according to the county's recorded deed. TopHap holds 9 recorded sales for this parcel.

How big is 3977 San Marcos Ave, Riverside, CA?

3977 San Marcos Ave, Riverside, CA has 3 bedrooms, 1.8 bathrooms, 1,341 square feet of living space and a 0.20-acre lot.

When was 3977 San Marcos Ave, Riverside, CA built?

3977 San Marcos Ave, Riverside, CA was built in 1952, making it 74 years old. The building has 1 story.

What schools serve 3977 San Marcos Ave, Riverside, CA?

3977 San Marcos Ave, Riverside, CA is assigned to Ramona High School (high), rated C; Sierra Middle School (middle), rated C; Thomas Jefferson Elementary School (elementary), rated C. All sit in Riverside Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 3977 San Marcos Ave, Riverside, CA compare to other homes in Riverside 92504?

Among the 13,364 homes in Riverside 92504, it is worth more than 22% of them ($512,049 against a typical $579,359), its price per square foot is higher than 39% of them ($382 against a typical $405), it is bigger than 44% of them (1,341 ft² against a typical 1,421 ft²), its lot is bigger than 55% of them (0.2 ac against a typical 0.19 ac) and it is newer than 18% of them (1952 against a typical 1960). Measured against all of Riverside County, it is worth more than 36% 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 3977 San Marcos Ave, Riverside, CA?

The 2025 property tax bill for 3977 San Marcos Ave, Riverside, CA was $2,147. The county assessed it at $191,227.

More homes on San Marcos Ave

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