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Single Family ResidenceResidential
$738,630$665 / 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 91How 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

3131 CASITAS AVE

ALTADENA, CA 91001
3
Beds
2
Baths
1,111 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.
0.18 ac
Lot SizeThe size of the land the home sits on, from county records.
1956
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

$739K
$674K low$804K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,688 (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.$548,885 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$376,811
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$172,074
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$538,123

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.Conventional
CountyLOS ANGELES
Lot (acres)The size of the land the home sits on, from county records.0.18
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.Floor/Wall Furnace
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(7)

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 · 1.4 mi
E
Altadena Arts Magnet SchoolC+
Elementary · Grades KG–5 · 1.9 mi
M
Charles W. Eliot Arts Magnet AcademyD
Middle · Grades 6–8 · 2.1 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

3131 Casitas 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 87% of homes in Altadena
  • Costs more per square foot than 67% of homes in Los Angeles County
  • Smaller than 86% of homes in Altadena
  • Newer than 83% of homes in Altadena

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
$588K$2.8M

This home is worth more than 16% 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$738,630
CheaperTypical $1,028,826Pricier

Pricier than 16% of homes nearby

Price per ft²$665
CheaperTypical $662Pricier

Pricier than 51% of homes nearby

Living area1,111 ft²
SmallerTypical 1,617 ft²Bigger

Bigger than 15% of homes nearby

Lot size0.18 ac
SmallerTypical 0.2 acBigger

Bigger than 43% of homes nearby

Year built1956
OlderTypical 1947Newer

Newer than 82% of homes nearby

How 3131 Casitas Ave ranks against every home in each area.
MeasureThis homeAltadenaAltadena 91001Los Angeles County
Estimated valuepricier than$738,63013% of homes16% of homes37% of homes
Price per ft²pricier than$66544% of homes51% of homes67% of homes
Living areabigger than1,111 ft²14% of homes15% of homes18% of homes
Lot sizebigger than0.18 ac45% of homes43% of homes60% of homes
Year builtnewer than195683% of homes82% of homes50% of homes

About 3131 Casitas Ave

How much is 3131 Casitas Ave, Altadena, CA worth?

The TopHap Estimate for 3131 Casitas Ave, Altadena, CA is $738,630 as of Sep 24, 2026. The likely range is $673,537 to $803,723. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 3131 Casitas Ave, Altadena, CA last sell?

3131 Casitas Ave, Altadena, CA last sold on Oct 30, 2002, according to the county's recorded deed.

How big is 3131 Casitas Ave, Altadena, CA?

3131 Casitas Ave, Altadena, CA has 3 bedrooms, 2 bathrooms, 1,111 square feet of living space and a 0.18-acre lot.

When was 3131 Casitas Ave, Altadena, CA built?

3131 Casitas Ave, Altadena, CA was built in 1956, making it 70 years old. It is a conventional home. The building has 1 story.

What schools serve 3131 Casitas Ave, Altadena, CA?

3131 Casitas Ave, Altadena, CA is assigned to John Muir High School (high), rated C-; Altadena Arts Magnet School (elementary), rated C+; 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 3131 Casitas Ave, Altadena, CA compare to other homes in Altadena 91001?

Among the 11,174 homes in Altadena 91001, it is worth more than 16% of them ($738,630 against a typical $1,028,826), its price per square foot is higher than 51% of them ($665 against a typical $662), it is bigger than 15% of them (1,111 ft² against a typical 1,617 ft²), its lot is bigger than 43% of them (0.18 ac against a typical 0.2 ac) and it is newer than 82% of them (1956 against a typical 1947). Measured against all of Los Angeles County, it is worth more than 37% 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 3131 Casitas Ave, Altadena, CA?

The 2025 property tax bill for 3131 Casitas Ave, Altadena, CA was $6,688. The county assessed it at $548,885.

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