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Single Family ResidenceResidential
$749,394$661 / 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 Sep 24, 2026
Last sold for $152,500 on Aug 10, 1993

657 W MARIPOSA ST

ALTADENA, CA 91001
3
Beds
1
Baths
1,134 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.
1926
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$749K
$707K low$792K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$152,500 · Aug 10, 1993

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,632 (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.$264,348 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$195,194
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$69,154
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$259,166

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.Spanish
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)
RoofThe main material covering the roof, such as asphalt shingle or tile.Roll Composition (rolled Mineral Roof)
HeatingThe type of heating system in the home.Floor/Wall Furnace
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.Yes

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.

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

657 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.

  • Worth less than 85% of homes in Altadena
  • Costs more per square foot than 67% of homes in Los Angeles County
  • Smaller than 84% of homes in Altadena
  • Has a bigger lot than 65% of homes in Los Angeles County
  • Older than 89% of homes in Los Angeles County

What homes are worth in Altadena 91001

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

This home
$575K$2.7M

This home is worth more than 18% of homes in Altadena 91001.

How it measures up in Altadena 91001

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

Estimated value$749,394
CheaperTypical $1,024,557Pricier

Pricier than 18% of homes nearby

Price per ft²$661
CheaperTypical $662Pricier

Pricier than 50% of homes nearby

Living area1,134 ft²
SmallerTypical 1,620 ft²Bigger

Bigger than 16% of homes nearby

Lot size0.2 ac
SmallerTypical 0.2 acBigger

Bigger than 51% of homes nearby

Year built1926
OlderTypical 1947Newer

Newer than 23% of homes nearby

How 657 W Mariposa St ranks against every home in each area.
MeasureThis homeAltadenaAltadena 91001Los Angeles County
Estimated valuepricier than$749,39415% of homes18% of homes38% of homes
Price per ft²pricier than$66143% of homes50% of homes67% of homes
Living areabigger than1,134 ft²16% of homes16% of homes20% of homes
Lot sizebigger than0.2 ac54% of homes51% of homes65% of homes
Year builtnewer than192623% of homes23% of homes11% of homes

About 657 W Mariposa St

How much is 657 W Mariposa St, Altadena, CA worth?

The TopHap Estimate for 657 W Mariposa St, Altadena, CA is $749,394 as of Sep 24, 2026. The likely range is $706,670 to $792,118. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 657 W Mariposa St, Altadena, CA last sell?

657 W Mariposa St, Altadena, CA last sold on Aug 10, 1993 for $152,500, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 657 W Mariposa St, Altadena, CA?

657 W Mariposa St, Altadena, CA has 3 bedrooms, 1 bathrooms, 1,134 square feet of living space and a 0.20-acre lot.

When was 657 W Mariposa St, Altadena, CA built?

657 W Mariposa St, Altadena, CA was built in 1926, making it 100 years old. It is a spanish home. The building has 1 story.

What schools serve 657 W Mariposa St, Altadena, CA?

657 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 657 W Mariposa St, Altadena, CA compare to other homes in Altadena 91001?

Among the 11,174 homes in Altadena 91001, it is worth more than 18% of them ($749,394 against a typical $1,024,557), its price per square foot is higher than 50% of them ($661 against a typical $662), it is bigger than 16% of them (1,134 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 23% of them (1926 against a typical 1947). Measured against all of Los Angeles County, it is worth more than 38% 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 657 W Mariposa St, Altadena, CA?

The 2025 property tax bill for 657 W Mariposa St, Altadena, CA was $3,632. The county assessed it at $264,348.

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