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Duplex (2 Units, Any Combination)Residential
Last sold for $286,000 on Jun 1, 2026

2857 SANTA ROSA AVE

ALTADENA, CA 91001
5
Beds
4
Baths
2,948 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.
0.24 ac
Lot SizeThe size of the land the home sits on, from county records.
1948
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
5
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$286,000 · Jun 1, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,150 (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.$325,205 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$325,205
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$318,829

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Duplex (2 Units, Any Combination)
StyleThe architectural style of the home, such as ranch or colonial.Conventional
CountyLOS ANGELES
Lot (acres)The size of the land the home sits on, from county records.0.24
ConstructionThe main material the home's frame and walls are built from.Masonry/Concrete Masonry Units (Cmus)
HeatingThe type of heating system in the home.Floor/Wall Furnace
CoolingThe type of cooling or air conditioning in the home.Central
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(13)

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(2)

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

E
Altadena Arts Magnet SchoolC+
Elementary · Grades KG–5 · 0.6 mi
M
Charles W. Eliot Arts Magnet AcademyD
Middle · Grades 6–8 · 0.8 mi
H
John Muir High SchoolC-
High · Grades 9–12 · 1.8 mi

District: Pasadena Unified School District

Neighborhood · ZIP 91001These 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.56
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 100.728

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.27%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.5%
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.34,397
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,046 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$132,057
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$176,224
Average tempThe average temperature here across a full year.59°F
Annual precipHow much rain and melted snow falls here in a typical year.34 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.73%

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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

2857 Santa Rosa 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.

  • Bigger than 91% of homes in Altadena
  • Has a bigger lot than 71% of homes in Altadena
  • Older than 72% of homes in Los Angeles County

How it measures up in Altadena 91001

The dot is this home. The mark in the middle is the typical home in Altadena 91001.

Living area2,948 ft²
SmallerTypical 1,617 ft²Bigger

Bigger than 91% of homes nearby

Lot size0.24 ac
SmallerTypical 0.2 acBigger

Bigger than 68% of homes nearby

Year built1948
OlderTypical 1947Newer

Newer than 63% of homes nearby

How 2857 Santa Rosa Ave ranks against every home in each area.
MeasureThis homeAltadenaAltadena 91001Los Angeles County
Living areabigger than2,948 ft²91% of homes91% of homes87% of homes
Lot sizebigger than0.24 ac71% of homes68% of homes71% of homes
Year builtnewer than194865% of homes63% of homes28% of homes

About 2857 Santa Rosa Ave

When did 2857 Santa Rosa Ave, Altadena, CA last sell?

2857 Santa Rosa Ave, Altadena, CA last sold on Jun 1, 2026 for $286,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 2857 Santa Rosa Ave, Altadena, CA?

2857 Santa Rosa Ave, Altadena, CA has 5 bedrooms, 4 bathrooms, 2,948 square feet of living space and a 0.24-acre lot.

When was 2857 Santa Rosa Ave, Altadena, CA built?

2857 Santa Rosa Ave, Altadena, CA was built in 1948, making it 78 years old. It is a conventional home. The building has 1 story.

What schools serve 2857 Santa Rosa Ave, Altadena, CA?

2857 Santa Rosa Ave, Altadena, CA is assigned to Altadena Arts Magnet School (elementary), rated C+; Charles W. Eliot Arts Magnet Academy (middle), rated D; John Muir High School (high), rated C-. All sit in Pasadena Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 2857 Santa Rosa Ave, Altadena, CA compare to other homes in Altadena 91001?

Among the 11,171 homes in Altadena 91001, it is bigger than 91% of them (2,948 ft² against a typical 1,617 ft²), its lot is bigger than 68% of them (0.24 ac against a typical 0.2 ac) and it is newer than 63% of them (1948 against a typical 1947). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 2857 Santa Rosa Ave, Altadena, CA?

The 2025 property tax bill for 2857 Santa Rosa Ave, Altadena, CA was $4,150. The county assessed it at $325,205.

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