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Single Family ResidenceResidential
$851,686$453 / 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 98How 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
Last sold for $640,000 on Jun 28, 2018

9918 MASON AVE

CHATSWORTH, CA 91311
4
Beds
3
Baths
1,882 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.
1957
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

$852K
$833K low$870K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$640,000 · Jun 28, 2018

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,116 (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.$742,767 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$545,123
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$197,644
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$728,204

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.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.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.1974
Lot (acres)The size of the land the home sits on, from county records.0.19
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.Window A/C
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(9)

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.

H
Chatsworth Charter High SchoolC
High · Grades 9–12 · 0.3 mi
E
Superior Street ElementaryA-
Elementary · Grades KG–5 · 0.3 mi
M
Ernest Lawrence Middle SchoolB
Middle · Grades 6–8 · 0.8 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

9918 Mason 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 70% of homes in Chatsworth
  • Costs less per square foot than 79% of homes in Los Angeles County
  • Bigger than 65% of homes in Los Angeles County
  • Has a smaller lot than 70% of homes in Chatsworth
  • Older than 92% 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 39% 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$851,686
CheaperTypical $916,323Pricier

Pricier than 39% of homes nearby

Price per ft²$453
CheaperTypical $468Pricier

Pricier than 41% of homes nearby

Living area1,882 ft²
SmallerTypical 1,872 ft²Bigger

Bigger than 51% of homes nearby

Lot size0.19 ac
SmallerTypical 0.27 acBigger

Bigger than 31% of homes nearby

Year built1957
OlderTypical 1974Newer

Newer than 12% of homes nearby

How 9918 Mason Ave ranks against every home in each area.
MeasureThis homeChatsworthChatsworth 91311Los Angeles County
Estimated valuepricier than$851,68630% of homes39% of homes52% of homes
Price per ft²pricier than$45336% of homes41% of homes21% of homes
Living areabigger than1,882 ft²44% of homes51% of homes65% of homes
Lot sizebigger than0.19 ac30% of homes31% of homes62% of homes
Year builtnewer than19578% of homes12% of homes51% of homes

About 9918 Mason Ave

How much is 9918 Mason Ave, Chatsworth, CA worth?

The TopHap Estimate for 9918 Mason Ave, Chatsworth, CA is $851,686 as of Sep 24, 2026. The likely range is $833,195 to $870,177. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 9918 Mason Ave, Chatsworth, CA last sell?

9918 Mason Ave, Chatsworth, CA last sold on Jun 28, 2018 for $640,000, according to the county's recorded deed. TopHap holds 4 recorded sales for this parcel.

How big is 9918 Mason Ave, Chatsworth, CA?

9918 Mason Ave, Chatsworth, CA has 4 bedrooms, 3 bathrooms, 1,882 square feet of living space and a 0.19-acre lot.

When was 9918 Mason Ave, Chatsworth, CA built?

9918 Mason Ave, Chatsworth, CA was built in 1957, making it 69 years old. It is a conventional home. The building has 1 story.

What schools serve 9918 Mason Ave, Chatsworth, CA?

9918 Mason Ave, Chatsworth, CA is assigned to Chatsworth Charter High School (high), rated C; Superior Street Elementary (elementary), rated A-; 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 9918 Mason Ave, Chatsworth, CA compare to other homes in Chatsworth 91311?

Among the 11,363 homes in Chatsworth 91311, it is worth more than 39% of them ($851,686 against a typical $916,323), its price per square foot is higher than 41% of them ($453 against a typical $468), it is bigger than 51% of them (1,882 ft² against a typical 1,872 ft²), its lot is bigger than 31% of them (0.19 ac against a typical 0.27 ac) and it is newer than 12% of them (1957 against a typical 1974). Measured against all of Los Angeles County, it is worth more than 52% 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 9918 Mason Ave, Chatsworth, CA?

The 2025 property tax bill for 9918 Mason Ave, Chatsworth, CA was $9,116. The county assessed it at $742,767.

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