Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$868,127$482 / 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 76How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026

9911 GIERSON AVE

CHATSWORTH, CA 91311
3
Beds
2
Baths
1,801 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.
0.24 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.

Valuation

$868K
$662K low$1.1M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,747 (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.$121,470 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$32,474
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$88,996
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$119,089

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.4 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
CountyLOS ANGELES
Lot (acres)The size of the land the home sits on, from county records.0.24
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(3)

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
Chatsworth Park Elementary SchoolB+
Elementary · Grades KG–5 · 0.6 mi
M
Ernest Lawrence Middle SchoolB
Middle · Grades 6–8 · 1.1 mi
H
Chatsworth Charter High SchoolC
High · Grades 9–12 · 1.6 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%

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

9911 Gierson 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 less than 68% of homes in Chatsworth
  • Costs less per square foot than 73% of homes in Los Angeles County
  • Has a bigger lot than 72% of homes in Los Angeles County
  • 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
$467K$2.6M

This home is worth more than 41% 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$868,127
CheaperTypical $918,981Pricier

Pricier than 41% of homes nearby

Price per ft²$482
CheaperTypical $469Pricier

Pricier than 56% of homes nearby

Living area1,801 ft²
SmallerTypical 1,878 ft²Bigger

Bigger than 46% of homes nearby

Lot size0.24 ac
SmallerTypical 0.27 acBigger

Bigger than 39% of homes nearby

Year built1959
OlderTypical 1974Newer

Newer than 20% of homes nearby

How 9911 Gierson Ave ranks against every home in each area.
MeasureThis homeChatsworthChatsworth 91311Los Angeles County
Estimated valuepricier than$868,12732% of homes41% of homes53% of homes
Price per ft²pricier than$48252% of homes56% of homes27% of homes
Living areabigger than1,801 ft²41% of homes46% of homes61% of homes
Lot sizebigger than0.24 ac38% of homes39% of homes72% of homes
Year builtnewer than195915% of homes20% of homes54% of homes

About 9911 Gierson Ave

How much is 9911 Gierson Ave, Chatsworth, CA worth?

The TopHap Estimate for 9911 Gierson Ave, Chatsworth, CA is $868,127 as of Sep 24, 2026. The likely range is $661,834 to $1,074,420. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 9911 Gierson Ave, Chatsworth, CA last sell?

9911 Gierson Ave, Chatsworth, CA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 9911 Gierson Ave, Chatsworth, CA?

9911 Gierson Ave, Chatsworth, CA has 3 bedrooms, 2 bathrooms, 1,801 square feet of living space and a 0.24-acre lot.

When was 9911 Gierson Ave, Chatsworth, CA built?

9911 Gierson Ave, Chatsworth, CA was built in 1959, making it 67 years old.

What schools serve 9911 Gierson Ave, Chatsworth, CA?

9911 Gierson Ave, 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 9911 Gierson Ave, Chatsworth, CA compare to other homes in Chatsworth 91311?

Among the 11,363 homes in Chatsworth 91311, it is worth more than 41% of them ($868,127 against a typical $918,981), its price per square foot is higher than 56% of them ($482 against a typical $469), it is bigger than 46% of them (1,801 ft² against a typical 1,878 ft²), its lot is bigger than 39% of them (0.24 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 53% 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 9911 Gierson Ave, Chatsworth, CA?

The 2025 property tax bill for 9911 Gierson Ave, Chatsworth, CA was $1,747. The county assessed it at $121,470.

More homes on Gierson Ave

Closest homes

More homes in Chatsworth 91311

Assigned schools

Explore the area

See this home in context

Open 9911 Gierson 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