Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$856,702$446 / 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 89How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026

20820 PARTHENIA ST

WINNETKA, CA 91306
4
Beds
3
Baths
1,920 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.
0.42 ac
Lot SizeThe size of the land the home sits on, from county records.
1954
Year BuiltThe year the home was originally built, according to county records.
12
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$857K
$767K low$947K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,898 (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.$451,772 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$361,423
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$90,349
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$442,915

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyLOS ANGELES
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1955
Lot (acres)The size of the land the home sits on, from county records.0.42
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
HeatingThe type of heating system in the home.Central
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(14)

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(6)

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

E
Limerick Avenue ElementaryB
Elementary · Grades PK–5 · 0.3 mi
H
Chatsworth Charter High SchoolC
High · Grades 9–12 · 1.7 mi
M
Ernest Lawrence Middle SchoolB
Middle · Grades 6–8 · 1.8 mi

District: Los Angeles Unified School District

Neighborhood · ZIP 91306These 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.76
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.117
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.413

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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.23%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.18%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.8%
PopulationHow many people live in this area.45,234
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.10,624 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$77,857
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$106,476
Average tempThe average temperature here across a full year.64°F
Annual precipHow much rain and melted snow falls here in a typical year.17 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.73%

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

20820 Parthenia 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 more than 76% of homes in Winnetka 91306
  • Costs less per square foot than 78% of homes in Los Angeles County
  • Bigger than 77% of homes in Winnetka 91306
  • Has a bigger lot than 82% of homes in Winnetka 91306
  • Older than 68% of homes in Winnetka 91306

What homes are worth in Winnetka 91306

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

This home
$319K$1.1M

This home is worth more than 76% of homes in Winnetka 91306.

How it measures up in Winnetka 91306

The dot is this home. The mark in the middle is the typical home in Winnetka 91306.

Estimated value$856,702
CheaperTypical $777,342Pricier

Pricier than 76% of homes nearby

Price per ft²$446
CheaperTypical $483Pricier

Pricier than 36% of homes nearby

Living area1,920 ft²
SmallerTypical 1,540 ft²Bigger

Bigger than 77% of homes nearby

Lot size0.42 ac
SmallerTypical 0.17 acBigger

Bigger than 82% of homes nearby

Year built1954
OlderTypical 1956Newer

Newer than 32% of homes nearby

How 20820 Parthenia St ranks against every home in each area.
MeasureThis homeWinnetka 91306Los Angeles County
Estimated valuepricier than$856,70276% of homes54% of homes
Price per ft²pricier than$44636% of homes22% of homes
Living areabigger than1,920 ft²77% of homes67% of homes
Lot sizebigger than0.42 ac82% of homes82% of homes
Year builtnewer than195432% of homes45% of homes

About 20820 Parthenia St

How much is 20820 Parthenia St, Winnetka, CA worth?

The TopHap Estimate for 20820 Parthenia St, Winnetka, CA is $856,702 as of Jul 14, 2026. The likely range is $766,593 to $946,811. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20820 Parthenia St, Winnetka, CA last sell?

20820 Parthenia St, Winnetka, CA last sold on Jul 1, 2020, according to the county's recorded deed. TopHap holds 6 recorded sales for this parcel.

How big is 20820 Parthenia St, Winnetka, CA?

20820 Parthenia St, Winnetka, CA has 4 bedrooms, 3 bathrooms, 1,920 square feet of living space and a 0.42-acre lot.

When was 20820 Parthenia St, Winnetka, CA built?

20820 Parthenia St, Winnetka, CA was built in 1954, making it 72 years old.

What schools serve 20820 Parthenia St, Winnetka, CA?

20820 Parthenia St, Winnetka, CA is assigned to Limerick Avenue Elementary (elementary), rated B; Chatsworth Charter High School (high), rated C; Ernest Lawrence Middle School (middle), rated B. All sit in Los Angeles Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 20820 Parthenia St, Winnetka, CA compare to other homes in Winnetka 91306?

Among the 10,740 homes in Winnetka 91306, it is worth more than 76% of them ($856,702 against a typical $777,342), its price per square foot is higher than 36% of them ($446 against a typical $483), it is bigger than 77% of them (1,920 ft² against a typical 1,540 ft²), its lot is bigger than 82% of them (0.42 ac against a typical 0.17 ac) and it is newer than 32% of them (1954 against a typical 1956). Measured against all of Los Angeles County, it is worth more than 54% 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 20820 Parthenia St, Winnetka, CA?

The 2025 property tax bill for 20820 Parthenia St, Winnetka, CA was $5,898. The county assessed it at $451,772.

More homes on Parthenia St

Closest homes

More homes in Winnetka 91306

Assigned schools

Explore the area

See this home in context

Open 20820 Parthenia St on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map