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Single Family ResidenceResidential
$799,567$614 / 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
Last sold for $399,000 on Apr 5, 2010

20309 LASSEN ST

CHATSWORTH, CA 91311
3
Beds
2
Baths
1,303 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.
0.17 ac
Lot SizeThe size of the land the home sits on, from county records.
1959
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

$800K
$773K low$826K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$399,000 · Apr 5, 2010

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,404 (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.$525,321 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$310,848
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$214,473
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$515,021

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.0.2 percent flood zone

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.0.17
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.Wood Shingle
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Evaporative
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.

Foreclosure Filings(3)

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

E
Superior Street ElementaryA-
Elementary · Grades KG–5 · 0.2 mi
H
Chatsworth Charter High SchoolB-
High · Grades 9–12 · 0.5 mi
M
Ernest Lawrence Middle SchoolB-
Middle · Grades 6–8 · 1.0 mi

District: Los Angeles Unified School District

Neighborhood · ZIP 91311These 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.71
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.110
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.542

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.29%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.2%
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.39,425
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,548 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$107,306
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$137,663
Average tempThe average temperature here across a full year.63°F
Annual precipHow much rain and melted snow falls here in a typical year.20 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

20309 Lassen 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 less than 75% of homes in Chatsworth
  • Costs more per square foot than 90% of homes in Chatsworth 91311
  • Smaller than 87% of homes in Chatsworth
  • Has a smaller lot than 90% of homes in Chatsworth 91311
  • Older than 85% of homes in Chatsworth

What homes are worth in Chatsworth 91311

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

This home
$462K$2.7M

This home is worth more than 32% of homes in Chatsworth 91311.

How it measures up in Chatsworth 91311

The dot is this home. The mark in the middle is the typical home in Chatsworth 91311.

Estimated value$799,567
CheaperTypical $912,186Pricier

Pricier than 32% of homes nearby

Price per ft²$614
CheaperTypical $467Pricier

Pricier than 90% of homes nearby

Living area1,303 ft²
SmallerTypical 1,875 ft²Bigger

Bigger than 15% of homes nearby

Lot size0.17 ac
SmallerTypical 0.27 acBigger

Bigger than 10% of homes nearby

Year built1959
OlderTypical 1974Newer

Newer than 20% of homes nearby

How 20309 Lassen St ranks against every home in each area.
MeasureThis homeChatsworthChatsworth 91311Los Angeles County
Estimated valuepricier than$799,56725% of homes32% of homes45% of homes
Price per ft²pricier than$61488% of homes90% of homes59% of homes
Living areabigger than1,303 ft²13% of homes15% of homes31% of homes
Lot sizebigger than0.17 ac12% of homes10% of homes49% of homes
Year builtnewer than195915% of homes20% of homes54% of homes

About 20309 Lassen St

How much is 20309 Lassen St, Chatsworth, CA worth?

The TopHap Estimate for 20309 Lassen St, Chatsworth, CA is $799,567 as of Oct 21, 2026. The likely range is $773,232 to $825,902. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20309 Lassen St, Chatsworth, CA last sell?

20309 Lassen St, Chatsworth, CA last sold on Apr 5, 2010 for $399,000, according to the county's recorded deed. TopHap holds 6 recorded sales for this parcel.

How big is 20309 Lassen St, Chatsworth, CA?

20309 Lassen St, Chatsworth, CA has 3 bedrooms, 2 bathrooms, 1,303 square feet of living space and a 0.17-acre lot.

When was 20309 Lassen St, Chatsworth, CA built?

20309 Lassen St, Chatsworth, CA was built in 1959, making it 67 years old. It is a conventional home. The building has 1 story.

What schools serve 20309 Lassen St, Chatsworth, CA?

20309 Lassen St, Chatsworth, CA is assigned to Superior Street Elementary (elementary), rated A-; Chatsworth Charter High School (high), rated B-; 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 20309 Lassen St, Chatsworth, CA compare to other homes in Chatsworth 91311?

Among the 11,370 homes in Chatsworth 91311, it is worth more than 32% of them ($799,567 against a typical $912,186), its price per square foot is higher than 90% of them ($614 against a typical $467), it is bigger than 15% of them (1,303 ft² against a typical 1,875 ft²), its lot is bigger than 10% of them (0.17 ac against a typical 0.27 ac) and it is newer than 20% of them (1959 against a typical 1974). Measured against all of Los Angeles County, it is worth more than 45% 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 20309 Lassen St, Chatsworth, CA?

The 2025 property tax bill for 20309 Lassen St, Chatsworth, CA was $6,404. The county assessed it at $525,321.

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