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Multi-Family Dwellings (Generic, Any Combination)Residential

21721 SEPTO ST

CHATSWORTH, CA 91311
96
Beds
99
Baths
83,094 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.
2.38 ac
Lot SizeThe size of the land the home sits on, from county records.
1971
Year BuiltThe year the home was originally built, according to county records.

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$45,886 (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.$2,793,453 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$462,634
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$2,330,819
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$2,738,680

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Multi-Family Dwellings (Generic, Any Combination)
CountyLOS ANGELES
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
CoolingThe type of cooling or air conditioning in the home.Central
PoolWhether the property has a pool, and what kind, such as in-ground.Yes

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

E
Chatsworth Park Elementary SchoolB+
Elementary · Grades KG–5 · 0.5 mi
M
Ernest Lawrence Middle SchoolB
Middle · Grades 6–8 · 0.6 mi
H
Chatsworth Charter High SchoolC
High · Grades 9–12 · 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

21721 Septo 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.

  • Among the largest homes in Chatsworth
  • Has a bigger lot than 95% of homes in Los Angeles County
  • Newer than 67% of homes in Los Angeles County

How it measures up in Chatsworth 91311

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

Living area83,094 ft²
SmallerTypical 1,876 ft²Bigger

Bigger than almost all homes nearby

Lot size2.38 ac
SmallerTypical 0.27 acBigger

Bigger than 84% of homes nearby

Year built1971
OlderTypical 1974Newer

Newer than 44% of homes nearby

How 21721 Septo St ranks against every home in each area.
MeasureThis homeChatsworthChatsworth 91311Los Angeles County
Living areabigger than83,094 ft²almost all homesalmost all homesalmost all homes
Lot sizebigger than2.38 ac86% of homes84% of homes95% of homes
Year builtnewer than197136% of homes44% of homes67% of homes

About 21721 Septo St

When did 21721 Septo St, Chatsworth, CA last sell?

21721 Septo St, Chatsworth, CA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 21721 Septo St, Chatsworth, CA?

21721 Septo St, Chatsworth, CA has 96 bedrooms, 99 bathrooms and 83,094 square feet of living space.

When was 21721 Septo St, Chatsworth, CA built?

21721 Septo St, Chatsworth, CA was built in 1971, making it 55 years old.

What schools serve 21721 Septo St, Chatsworth, CA?

21721 Septo St, Chatsworth, CA is assigned to Chatsworth Park Elementary School (elementary), rated B+; Ernest Lawrence Middle School (middle), rated B; Chatsworth Charter High School (high), rated C. All sit in Los Angeles Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21721 Septo St, Chatsworth, CA compare to other homes in Chatsworth 91311?

Among the 11,363 homes in Chatsworth 91311, it is bigger than almost all of them (83,094 ft² against a typical 1,876 ft²), its lot is bigger than 84% of them (2.38 ac against a typical 0.27 ac) and it is newer than 44% of them (1971 against a typical 1974). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 21721 Septo St, Chatsworth, CA?

The 2025 property tax bill for 21721 Septo St, Chatsworth, CA was $45,886. The county assessed it at $2,793,453.

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