Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$1,111,161$398 / 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 90How 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
Last sold for $1,110,000 on Nov 4, 2025

8140 QUARTZ AVE

WINNETKA, CA 91306
4
Beds
3
Baths
2,791 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.
0.28 ac
Lot SizeThe size of the land the home sits on, from county records.
1941
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1.1M
$999K low$1.2M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,110,000 · Nov 4, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$19,091 (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.$1,110,000 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$800,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$310,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$808,299

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
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.1980
Lot (acres)The size of the land the home sits on, from county records.0.28
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.Central
CoolingThe type of cooling or air conditioning 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.Yes

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
Winnetka Elementary SchoolC-
Elementary · Grades KG–5 · 0.4 mi
H
Cleveland Charter High SchoolA
High · Grades 9–12 · 0.9 mi
M
John A. Sutter Middle SchoolC+
Middle · Grades 6–8 · 1.0 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%

Owner Tools

Do you own this home?
Claim this home

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

8140 Quartz 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 more than 98% of homes in Winnetka 91306
  • Costs less per square foot than 86% of homes in Los Angeles County
  • Bigger than 96% of homes in Winnetka 91306
  • Has a bigger lot than 79% of homes in Winnetka 91306
  • Among the oldest 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 98% 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$1,111,161
CheaperTypical $776,894Pricier

Pricier than 98% of homes nearby

Price per ft²$398
CheaperTypical $482Pricier

Pricier than 20% of homes nearby

Living area2,791 ft²
SmallerTypical 1,528 ft²Bigger

Bigger than 96% of homes nearby

Lot size0.28 ac
SmallerTypical 0.17 acBigger

Bigger than 79% of homes nearby

Year built1941
OlderTypical 1956Newer

Older than almost all homes nearby

How 8140 Quartz Ave ranks against every home in each area.
MeasureThis homeWinnetka 91306Los Angeles County
Estimated valuepricier than$1,111,16198% of homes71% of homes
Price per ft²pricier than$39820% of homes14% of homes
Living areabigger than2,791 ft²96% of homes87% of homes
Lot sizebigger than0.28 ac79% of homes75% of homes
Year builtnewer than1941almost no homes21% of homes

About 8140 Quartz Ave

How much is 8140 Quartz Ave, Winnetka, CA worth?

The TopHap Estimate for 8140 Quartz Ave, Winnetka, CA is $1,111,161 as of Jul 14, 2026. The likely range is $998,668 to $1,223,654. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 8140 Quartz Ave, Winnetka, CA last sell?

8140 Quartz Ave, Winnetka, CA last sold on Nov 4, 2025 for $1,110,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 8140 Quartz Ave, Winnetka, CA?

8140 Quartz Ave, Winnetka, CA has 4 bedrooms, 3 bathrooms, 2,791 square feet of living space and a 0.28-acre lot.

When was 8140 Quartz Ave, Winnetka, CA built?

8140 Quartz Ave, Winnetka, CA was built in 1941, making it 85 years old. It is a conventional home. The building has 1 story.

What schools serve 8140 Quartz Ave, Winnetka, CA?

8140 Quartz Ave, Winnetka, CA is assigned to Winnetka Elementary School (elementary), rated C-; Cleveland Charter High School (high), rated A; John A. Sutter Middle School (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 8140 Quartz Ave, Winnetka, CA compare to other homes in Winnetka 91306?

Among the 10,701 homes in Winnetka 91306, it is worth more than 98% of them ($1,111,161 against a typical $776,894), its price per square foot is higher than 20% of them ($398 against a typical $482), it is bigger than 96% of them (2,791 ft² against a typical 1,528 ft²), its lot is bigger than 79% of them (0.28 ac against a typical 0.17 ac) and it is newer than almost none of them (1941 against a typical 1956). Measured against all of Los Angeles County, it is worth more than 71% 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 8140 Quartz Ave, Winnetka, CA?

The 2025 property tax bill for 8140 Quartz Ave, Winnetka, CA was $19,091. The county assessed it at $1,110,000.

More homes on Quartz Ave

Closest homes

More homes in Winnetka 91306

Assigned schools

Explore the area

See this home in context

Open 8140 Quartz Ave 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