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Single Family ResidenceResidential
$771,885$559 / 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 96How 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

20840 GRETCHEN ST

WINNETKA, CA 91306
4
Beds
2
Baths
1,380 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.
0.19 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.
8
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$772K
$741K low$802K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,297 (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.$94,450 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$51,227
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$43,223
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$92,599

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.16 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.Modern
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.Rock / Gravel
HeatingThe type of heating system in the home.Central
FireplaceWhether the home has a fireplace, and what kind.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.

E
Hart Street ElementaryD-
Elementary · Grades PK–5 · 0.4 mi
H
Canoga Park High SchoolC-
High · Grades 9–12 · 1.0 mi
M
Woodland Hills AcademyC-
Middle · Grades 6–8 · 1.4 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%

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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

20840 Gretchen 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.

  • Costs more per square foot than 79% of homes in Winnetka 91306
  • Smaller than 65% of homes in Winnetka 91306
  • Has a bigger lot than 70% 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
$343K$1.1M

This home is worth more than 49% 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$771,885
CheaperTypical $776,116Pricier

Pricier than 49% of homes nearby

Price per ft²$559
CheaperTypical $483Pricier

Pricier than 79% of homes nearby

Living area1,380 ft²
SmallerTypical 1,540 ft²Bigger

Bigger than 35% of homes nearby

Lot size0.19 ac
SmallerTypical 0.17 acBigger

Bigger than 70% of homes nearby

Year built1956
OlderTypical 1956Newer

Newer than 55% of homes nearby

How 20840 Gretchen St ranks against every home in each area.
MeasureThis homeWinnetka 91306Los Angeles County
Estimated valuepricier than$771,88549% of homes44% of homes
Price per ft²pricier than$55979% of homes49% of homes
Living areabigger than1,380 ft²35% of homes36% of homes
Lot sizebigger than0.19 ac70% of homes63% of homes
Year builtnewer than195655% of homes50% of homes

About 20840 Gretchen St

How much is 20840 Gretchen St, Winnetka, CA worth?

The TopHap Estimate for 20840 Gretchen St, Winnetka, CA is $771,885 as of Jul 14, 2026. The likely range is $741,455 to $802,315. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20840 Gretchen St, Winnetka, CA last sell?

20840 Gretchen St, Winnetka, CA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 20840 Gretchen St, Winnetka, CA?

20840 Gretchen St, Winnetka, CA has 4 bedrooms, 2 bathrooms, 1,380 square feet of living space and a 0.20-acre lot.

When was 20840 Gretchen St, Winnetka, CA built?

20840 Gretchen St, Winnetka, CA was built in 1956, making it 70 years old. It is a modern home. The building has 1 story.

What schools serve 20840 Gretchen St, Winnetka, CA?

20840 Gretchen St, Winnetka, CA is assigned to Hart Street Elementary (elementary), rated D-; Canoga Park High School (high), rated C-; Woodland Hills Academy (middle), rated C-. All sit in Los Angeles Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 20840 Gretchen St, Winnetka, CA compare to other homes in Winnetka 91306?

Among the 10,701 homes in Winnetka 91306, it is worth more than 49% of them ($771,885 against a typical $776,116), its price per square foot is higher than 79% of them ($559 against a typical $483), it is bigger than 35% of them (1,380 ft² against a typical 1,540 ft²), its lot is bigger than 70% of them (0.19 ac against a typical 0.17 ac) and it is newer than 55% of them (1956 against a typical 1956). Measured against all of Los Angeles County, it is worth more than 44% 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 20840 Gretchen St, Winnetka, CA?

The 2025 property tax bill for 20840 Gretchen St, Winnetka, CA was $1,297. The county assessed it at $94,450.

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