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Duplex (2 Units, Any Combination)Residential

633 W MARIPOSA ST

ALTADENA, CA 91001
4
Beds
1
Baths
1,742 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.
1950
Year BuiltThe year the home was originally built, according to county records.

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,992 (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.$58,199 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$14,464
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$43,735
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$57,059

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.Duplex Single
CountyLOS ANGELES
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)
HeatingThe type of heating system in the home.Floor/Wall Furnace
CoolingThe type of cooling or air conditioning in the home.Yes
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.

H
John Muir High SchoolC-
High · Grades 9–12 · 1.3 mi
E
Altadena Arts Magnet SchoolB
Elementary · Grades KG–5 · 1.7 mi
M
Charles W. Eliot Arts Magnet AcademyD
Middle · Grades 6–8 · 2.0 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

633 W Mariposa 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.

  • Has a bigger lot than 65% of homes in Los Angeles County
  • Newer than 72% of homes in Altadena

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 area1,742 ft²
SmallerTypical 1,620 ft²Bigger

Bigger than 57% of homes nearby

Lot size0.2 ac
SmallerTypical 0.2 acBigger

Bigger than 51% of homes nearby

Year built1950
OlderTypical 1947Newer

Newer than 71% of homes nearby

How 633 W Mariposa St ranks against every home in each area.
MeasureThis homeAltadenaAltadena 91001Los Angeles County
Living areabigger than1,742 ft²57% of homes57% of homes58% of homes
Lot sizebigger than0.2 ac54% of homes51% of homes65% of homes
Year builtnewer than195072% of homes71% of homes34% of homes

About 633 W Mariposa St

When did 633 W Mariposa St, Altadena, CA last sell?

633 W Mariposa St, Altadena, CA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 633 W Mariposa St, Altadena, CA?

633 W Mariposa St, Altadena, CA has 4 bedrooms, 1 bathrooms, 1,742 square feet of living space and a 0.20-acre lot.

When was 633 W Mariposa St, Altadena, CA built?

633 W Mariposa St, Altadena, CA was built in 1950, making it 76 years old. It is a duplex single home.

What schools serve 633 W Mariposa St, Altadena, CA?

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

How does 633 W Mariposa St, Altadena, CA compare to other homes in Altadena 91001?

Among the 11,174 homes in Altadena 91001, it is bigger than 57% of them (1,742 ft² against a typical 1,620 ft²), its lot is bigger than 51% of them (0.2 ac against a typical 0.2 ac) and it is newer than 71% of them (1950 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 633 W Mariposa St, Altadena, CA?

The 2025 property tax bill for 633 W Mariposa St, Altadena, CA was $1,992. The county assessed it at $58,199.

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