Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$1,060,618$604 / 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 93How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $337,500 on Nov 12, 1999

18231 LOS ALIMOS ST

PORTER RANCH, CA 91326
4
Beds
2
Baths
1,756 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.
1960
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
10
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1.1M
$985K low$1.1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$337,500 · Nov 12, 1999
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$720,618
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$576,494
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.31%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$290,000
GOLDEN EMPIRE MORTGAGE INC · recorded Nov 15, 2021
2nd MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$50,000
WESCOM CENTRAL CU

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,990 (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.$380,380 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$292,014
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$88,366
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$372,923

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
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)
RoofThe main material covering the roof, such as asphalt shingle or tile.Rock / Gravel
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(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.

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

E
Darby Avenue Charter ElementaryA-
Elementary · Grades KG–5 · 0.1 mi
H
Granada Hills High SchoolA
High · Grades 9–12 · 0.5 mi
M
Patrick Henry Middle SchoolA
Middle · Grades 6–8 · 1.2 mi

District: Granada Hills Charter 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.36,139
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,788 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$133,105
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$160,689
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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

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

18231 Los Alimos 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.

  • Worth less than 72% of homes in Porter Ranch
  • Costs more per square foot than 84% of homes in Porter Ranch
  • Smaller than 80% of homes in Porter Ranch
  • Has a bigger lot than 73% of homes in Los Angeles County
  • Older than 92% 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
$634K$2.6M

This home is worth more than 28% 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$1,060,618
CheaperTypical $1,215,491Pricier

Pricier than 28% of homes nearby

Price per ft²$604
CheaperTypical $511Pricier

Pricier than 82% of homes nearby

Living area1,756 ft²
SmallerTypical 2,358 ft²Bigger

Bigger than 22% of homes nearby

Lot size0.25 ac
SmallerTypical 0.25 acBigger

Bigger than 55% of homes nearby

Year built1960
OlderTypical 1979Newer

Newer than 8% of homes nearby

How 18231 Los Alimos St ranks against every home in each area.
MeasureThis homePorter RanchPorter Ranch 91326Los Angeles County
Estimated valuepricier than$1,060,61828% of homes28% of homes68% of homes
Price per ft²pricier than$60484% of homes82% of homes57% of homes
Living areabigger than1,756 ft²20% of homes22% of homes59% of homes
Lot sizebigger than0.25 ac58% of homes55% of homes73% of homes
Year builtnewer than196011% of homes8% of homes55% of homes

About 18231 Los Alimos St

How much is 18231 Los Alimos St, Porter Ranch, CA worth?

The TopHap Estimate for 18231 Los Alimos St, Porter Ranch, CA is $1,060,618 as of Jul 14, 2026. The likely range is $985,081 to $1,136,155. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18231 Los Alimos St, Porter Ranch, CA last sell?

18231 Los Alimos St, Porter Ranch, CA last sold on Nov 12, 1999 for $337,500, according to the county's recorded deed.

How big is 18231 Los Alimos St, Porter Ranch, CA?

18231 Los Alimos St, Porter Ranch, CA has 4 bedrooms, 2 bathrooms, 1,756 square feet of living space and a 0.25-acre lot.

When was 18231 Los Alimos St, Porter Ranch, CA built?

18231 Los Alimos St, Porter Ranch, CA was built in 1960, making it 66 years old. It is a conventional home. The building has 1 story.

What schools serve 18231 Los Alimos St, Porter Ranch, CA?

18231 Los Alimos St, Porter Ranch, CA is assigned to Darby Avenue Charter Elementary (elementary), rated A-; Granada Hills High School (high), rated A; Patrick Henry Middle School (middle), rated A. All sit in Granada Hills Charter District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 18231 Los Alimos St, 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 28% of them ($1,060,618 against a typical $1,215,491), its price per square foot is higher than 82% of them ($604 against a typical $511), it is bigger than 22% of them (1,756 ft² against a typical 2,358 ft²), its lot is bigger than 55% of them (0.25 ac against a typical 0.25 ac) and it is newer than 8% of them (1960 against a typical 1979). Measured against all of Los Angeles County, it is worth more than 68% 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 18231 Los Alimos St, Porter Ranch, CA?

The 2025 property tax bill for 18231 Los Alimos St, Porter Ranch, CA was $4,990. The county assessed it at $380,380.

Closest homes

More homes in Porter Ranch 91326

Assigned schools

Explore the area

See this home in context

Open 18231 Los Alimos St 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