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Single Family ResidenceResidential
$1,450,000$509 / 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 94How 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

10640 SYLVIA AVE

PORTER RANCH, CA 91326
5
Beds
3
Baths
2,849 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.
0.26 ac
Lot SizeThe size of the land the home sits on, from county records.
1968
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
12
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1.5M
$1.4M low$1.5M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$13,241 (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.$1,094,761 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$756,953
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$337,808
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,073,296

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.1990
Lot (acres)The size of the land the home sits on, from county records.0.26
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.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(5)

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(2)

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

E
Beckford Charter for Enriched StudiesA+
Elementary · Grades KG–5 · 0.3 mi
M
Nobel Middle SchoolA
Middle · Grades 6–8 · 0.9 mi
H
Granada Hills High SchoolA
High · Grades 9–12 · 1.6 mi

District: Los Angeles Unified School District

Neighborhood · ZIP 91326These 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.53
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.111
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.808

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.33%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.7%
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.36,202
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,793 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$133,178
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$160,858
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

10640 Sylvia 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 86% of homes in Porter Ranch
  • Costs less per square foot than 66% of homes in Los Angeles County
  • Bigger than 87% of homes in Los Angeles County
  • Has a bigger lot than 74% of homes in Los Angeles County
  • Older than 74% of homes in Porter Ranch 91326

What homes are worth in Porter Ranch 91326

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

This home
$636K$2.5M

This home is worth more than 78% of homes in Porter Ranch 91326.

How it measures up in Porter Ranch 91326

The dot is this home. The mark in the middle is the typical home in Porter Ranch 91326.

Estimated value$1,450,000
CheaperTypical $1,197,928Pricier

Pricier than 78% of homes nearby

Price per ft²$509
CheaperTypical $501Pricier

Pricier than 55% of homes nearby

Living area2,849 ft²
SmallerTypical 2,358 ft²Bigger

Bigger than 73% of homes nearby

Lot size0.26 ac
SmallerTypical 0.25 acBigger

Bigger than 63% of homes nearby

Year built1968
OlderTypical 1978Newer

Newer than 26% of homes nearby

How 10640 Sylvia Ave ranks against every home in each area.
MeasureThis homePorter RanchPorter Ranch 91326Los Angeles County
Estimated valuepricier than$1,450,00086% of homes78% of homes82% of homes
Price per ft²pricier than$50954% of homes55% of homes34% of homes
Living areabigger than2,849 ft²83% of homes73% of homes87% of homes
Lot sizebigger than0.26 ac68% of homes63% of homes74% of homes
Year builtnewer than196835% of homes26% of homes64% of homes

About 10640 Sylvia Ave

How much is 10640 Sylvia Ave, Porter Ranch, CA worth?

The TopHap Estimate for 10640 Sylvia Ave, Porter Ranch, CA is $1,450,000 as of Sep 24, 2026. The likely range is $1,364,865 to $1,535,135. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 10640 Sylvia Ave, Porter Ranch, CA last sell?

10640 Sylvia Ave, Porter Ranch, CA last sold on Nov 30, 2004, according to the county's recorded deed.

How big is 10640 Sylvia Ave, Porter Ranch, CA?

10640 Sylvia Ave, Porter Ranch, CA has 5 bedrooms, 3 bathrooms, 2,849 square feet of living space and a 0.26-acre lot.

When was 10640 Sylvia Ave, Porter Ranch, CA built?

10640 Sylvia Ave, Porter Ranch, CA was built in 1968, making it 58 years old. It is a conventional home. The building has 2 stories.

What schools serve 10640 Sylvia Ave, Porter Ranch, CA?

10640 Sylvia Ave, Porter Ranch, CA is assigned to Beckford Charter for Enriched Studies (elementary), rated A+; Nobel Middle School (middle), rated A; Granada Hills High School (high), rated A. All sit in Los Angeles Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 10640 Sylvia Ave, Porter Ranch, CA compare to other homes in Porter Ranch 91326?

Among the 12,127 homes in Porter Ranch 91326, it is worth more than 78% of them ($1,450,000 against a typical $1,197,928), its price per square foot is higher than 55% of them ($509 against a typical $501), it is bigger than 73% of them (2,849 ft² against a typical 2,358 ft²), its lot is bigger than 63% of them (0.26 ac against a typical 0.25 ac) and it is newer than 26% of them (1968 against a typical 1978). Measured against all of Los Angeles County, it is worth more than 82% 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 10640 Sylvia Ave, Porter Ranch, CA?

The 2025 property tax bill for 10640 Sylvia Ave, Porter Ranch, CA was $13,241. The county assessed it at $1,094,761.

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