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Single Family ResidenceResidential
$545,476$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 97How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026

2139 FLAGSTONE AVE

DUARTE, CA 91010
2
Beds
1
Baths
825 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.
0.14 ac
Lot SizeThe size of the land the home sits on, from county records.
1949
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

$545K
$530K low$561K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$969 (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.$37,668 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$12,707
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$24,961
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$36,930

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.8 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

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.0.14
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.Composition Shingle
HeatingThe type of heating system in the home.Floor/Wall Furnace
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(8)

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.

E
Maxwell Academy - An IB World SchoolC+
Elementary · Grades KG–8 · 0.4 mi
H
Duarte High SchoolB
High · Grades 9–12 · 1.6 mi

District: Duarte Unified School District

Neighborhood · ZIP 91010These 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.62
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.103
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.682

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.22%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.7%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.6%
PopulationHow many people live in this area.26,725
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,885 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$91,243
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$111,021
Average tempThe average temperature here across a full year.63°F
Annual precipHow much rain and melted snow falls here in a typical year.25 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

2139 Flagstone 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 92% of homes in Duarte 91010
  • Costs more per square foot than 73% of homes in Duarte 91010
  • Smaller than 95% of homes in Los Angeles County
  • Has a smaller lot than 73% of homes in Los Angeles County
  • Older than 73% of homes in Duarte 91010

What homes are worth in Duarte 91010

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

This home
$480K$1.2M

This home is worth more than 8% of homes in Duarte 91010.

How it measures up in Duarte 91010

The dot is this home. The mark in the middle is the typical home in Duarte 91010.

Estimated value$545,476
CheaperTypical $727,496Pricier

Pricier than 8% of homes nearby

Price per ft²$661
CheaperTypical $558Pricier

Pricier than 73% of homes nearby

Living area825 ft²
SmallerTypical 1,328 ft²Bigger

Bigger than 8% of homes nearby

Lot size0.14 ac
SmallerTypical 0.15 acBigger

Bigger than 30% of homes nearby

Year built1949
OlderTypical 1956Newer

Newer than 27% of homes nearby

How 2139 Flagstone Ave ranks against every home in each area.
MeasureThis homeDuarte 91010Los Angeles County
Estimated valuepricier than$545,4768% of homes13% of homes
Price per ft²pricier than$66173% of homes67% of homes
Living areabigger than825 ft²8% of homes5% of homes
Lot sizebigger than0.14 ac30% of homes27% of homes
Year builtnewer than194927% of homes31% of homes

About 2139 Flagstone Ave

How much is 2139 Flagstone Ave, Duarte, CA worth?

The TopHap Estimate for 2139 Flagstone Ave, Duarte, CA is $545,476 as of Oct 21, 2026. The likely range is $530,451 to $560,500. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 2139 Flagstone Ave, Duarte, CA last sell?

2139 Flagstone Ave, Duarte, CA last sold on Aug 3, 1999, according to the county's recorded deed.

How big is 2139 Flagstone Ave, Duarte, CA?

2139 Flagstone Ave, Duarte, CA has 2 bedrooms, 1 bathrooms, 825 square feet of living space and a 0.14-acre lot.

When was 2139 Flagstone Ave, Duarte, CA built?

2139 Flagstone Ave, Duarte, CA was built in 1949, making it 77 years old. It is a conventional home. The building has 1 story.

What schools serve 2139 Flagstone Ave, Duarte, CA?

2139 Flagstone Ave, Duarte, CA is assigned to Maxwell Academy - An IB World School (elementary), rated C+; Duarte High School (high), rated B. All sit in Duarte Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 2139 Flagstone Ave, Duarte, CA compare to other homes in Duarte 91010?

Among the 6,614 homes in Duarte 91010, it is worth more than 8% of them ($545,476 against a typical $727,496), its price per square foot is higher than 73% of them ($661 against a typical $558), it is bigger than 8% of them (825 ft² against a typical 1,328 ft²), its lot is bigger than 30% of them (0.14 ac against a typical 0.15 ac) and it is newer than 27% of them (1949 against a typical 1956). Measured against all of Los Angeles County, it is worth more than 13% 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 2139 Flagstone Ave, Duarte, CA?

The 2025 property tax bill for 2139 Flagstone Ave, Duarte, CA was $969. The county assessed it at $37,668.

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