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Single Family ResidenceResidential
$1,728,621$405 / 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 Aug 30, 2026
Last sold for $565,000 on Jun 29, 1999

18327 CHATHAM LN

PORTER RANCH, CA 91326
5
Beds
4
Baths
4,270 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.
0.25 ac
Lot SizeThe size of the land the home sits on, from county records.
1986
Year BuiltThe year the home was originally built, according to county records.
9
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1.7M
$1.7M low$1.8M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$565,000 · Jun 29, 1999

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$11,118 (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.$903,456 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$335,153
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$568,303
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$885,742

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.12 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.0.25
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
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
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.Yes

Transaction History(6)

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
Castlebay Lane Charter Elementary SchoolA+
Elementary · Grades KG–5 · 1.2 mi
H
Granada Hills High SchoolA
High · Grades 9–12 · 1.5 mi
M
Robert Frost Middle SchoolA
Middle · Grades 6–8 · 1.5 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

18327 Chatham Ln 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 97% of homes in Porter Ranch
  • Costs less per square foot than 97% of homes in Porter Ranch
  • Bigger than 98% of homes in Porter Ranch
  • Has a bigger lot than 72% of homes in Los Angeles County
  • Newer than 82% of homes in Los Angeles County

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
$622K$2.5M

This home is worth more than 90% 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$1,728,621
CheaperTypical $1,189,314Pricier

Pricier than 90% of homes nearby

Price per ft²$405
CheaperTypical $499Pricier

Pricier than 3% of homes nearby

Living area4,270 ft²
SmallerTypical 2,358 ft²Bigger

Bigger than 94% of homes nearby

Lot size0.25 ac
SmallerTypical 0.25 acBigger

Bigger than 50% of homes nearby

Year built1986
OlderTypical 1979Newer

Newer than 58% of homes nearby

How 18327 Chatham Ln ranks against every home in each area.
MeasureThis homePorter RanchPorter Ranch 91326Los Angeles County
Estimated valuepricier than$1,728,62197% of homes90% of homes88% of homes
Price per ft²pricier than$4053% of homes3% of homes15% of homes
Living areabigger than4,270 ft²98% of homes94% of homes95% of homes
Lot sizebigger than0.25 ac52% of homes50% of homes72% of homes
Year builtnewer than198676% of homes58% of homes82% of homes

About 18327 Chatham Ln

How much is 18327 Chatham Ln, Porter Ranch, CA worth?

The TopHap Estimate for 18327 Chatham Ln, Porter Ranch, CA is $1,728,621 as of Aug 30, 2026. The likely range is $1,702,275 to $1,754,967. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18327 Chatham Ln, Porter Ranch, CA last sell?

18327 Chatham Ln, Porter Ranch, CA last sold on Jun 29, 1999 for $565,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 18327 Chatham Ln, Porter Ranch, CA?

18327 Chatham Ln, Porter Ranch, CA has 5 bedrooms, 4 bathrooms, 4,270 square feet of living space and a 0.25-acre lot.

When was 18327 Chatham Ln, Porter Ranch, CA built?

18327 Chatham Ln, Porter Ranch, CA was built in 1986, making it 40 years old.

What schools serve 18327 Chatham Ln, Porter Ranch, CA?

18327 Chatham Ln, Porter Ranch, CA is assigned to Castlebay Lane Charter Elementary School (elementary), rated A+; Granada Hills High School (high), rated A; Robert Frost Middle School (middle), rated A. All sit in Los Angeles Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 18327 Chatham Ln, Porter Ranch, CA compare to other homes in Porter Ranch 91326?

Among the 12,126 homes in Porter Ranch 91326, it is worth more than 90% of them ($1,728,621 against a typical $1,189,314), its price per square foot is higher than 3% of them ($405 against a typical $499), it is bigger than 94% of them (4,270 ft² against a typical 2,358 ft²), its lot is bigger than 50% of them (0.25 ac against a typical 0.25 ac) and it is newer than 58% of them (1986 against a typical 1979). Measured against all of Los Angeles County, it is worth more than 88% 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 18327 Chatham Ln, Porter Ranch, CA?

The 2025 property tax bill for 18327 Chatham Ln, Porter Ranch, CA was $11,118. The county assessed it at $903,456.

More homes on Chatham Ln

Closest homes

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Assigned schools

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