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Single Family ResidenceResidential
$660,629$483 / 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 96How 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 $250,000 on Mar 16, 2011

18203 COMPANARIO DR

ROWLAND HEIGHTS, CA 91748
4
Beds
2
Baths
1,368 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.
0.13 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.
1
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$661K
$637K low$685K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$250,000 · Mar 16, 2011

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,198 (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.$383,492 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$261,354
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$122,138
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$375,980

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.10 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.1975
Lot (acres)The size of the land the home sits on, from county records.0.13
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.Floor/Wall Furnace
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.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.

Foreclosure Filings(3)

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

E
Jellick Elementary SchoolB-
Elementary · Grades KG–6 · 0.4 mi
M
Alvarado Intermediate SchoolB
Middle · Grades 7–8 · 0.8 mi
H
John A. Rowland High SchoolA-
High · Grades 9–12 · 1.4 mi

District: Rowland Unified School District

Neighborhood · ZIP 91748These 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.60
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.108
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.400

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.28%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.9.6%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.7%
PopulationHow many people live in this area.41,340
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,384 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$79,796
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$99,738
Average tempThe average temperature here across a full year.64°F
Annual precipHow much rain and melted snow falls here in a typical year.17 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

18203 Companario Dr 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 95% of homes in Rowland Heights 91748
  • Costs less per square foot than 73% of homes in Rowland Heights 91748
  • Smaller than 73% of homes in Rowland Heights 91748
  • Has a smaller lot than 97% of homes in Rowland Heights 91748
  • Older than 95% of homes in Rowland Heights 91748

What homes are worth in Rowland Heights 91748

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

This home
$432K$1.9M

This home is worth more than 5% of homes in Rowland Heights 91748.

How it measures up in Rowland Heights 91748

The dot is this home. The mark in the middle is the typical home in Rowland Heights 91748.

Estimated value$660,629
CheaperTypical $942,198Pricier

Pricier than 5% of homes nearby

Price per ft²$483
CheaperTypical $529Pricier

Pricier than 27% of homes nearby

Living area1,368 ft²
SmallerTypical 1,741 ft²Bigger

Bigger than 27% of homes nearby

Lot size0.13 ac
SmallerTypical 0.17 acBigger

Bigger than 3% of homes nearby

Year built1959
OlderTypical 1973Newer

Newer than 5% of homes nearby

How 18203 Companario Dr ranks against every home in each area.
MeasureThis homeRowland Heights 91748Los Angeles County
Estimated valuepricier than$660,6295% of homes28% of homes
Price per ft²pricier than$48327% of homes30% of homes
Living areabigger than1,368 ft²27% of homes36% of homes
Lot sizebigger than0.13 ac3% of homes20% of homes
Year builtnewer than19595% of homes54% of homes

About 18203 Companario Dr

How much is 18203 Companario Dr, Rowland Heights, CA worth?

The TopHap Estimate for 18203 Companario Dr, Rowland Heights, CA is $660,629 as of Jul 14, 2026. The likely range is $636,522 to $684,736. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18203 Companario Dr, Rowland Heights, CA last sell?

18203 Companario Dr, Rowland Heights, CA last sold on Mar 16, 2011 for $250,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 18203 Companario Dr, Rowland Heights, CA?

18203 Companario Dr, Rowland Heights, CA has 4 bedrooms, 2 bathrooms, 1,368 square feet of living space and a 0.13-acre lot.

When was 18203 Companario Dr, Rowland Heights, CA built?

18203 Companario Dr, Rowland Heights, CA was built in 1959, making it 67 years old. It is a conventional home. The building has 1 story.

What schools serve 18203 Companario Dr, Rowland Heights, CA?

18203 Companario Dr, Rowland Heights, CA is assigned to Jellick Elementary School (elementary), rated B-; Alvarado Intermediate School (middle), rated B; John A. Rowland High School (high), rated A-. All sit in Rowland Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 18203 Companario Dr, Rowland Heights, CA compare to other homes in Rowland Heights 91748?

Among the 10,789 homes in Rowland Heights 91748, it is worth more than 5% of them ($660,629 against a typical $942,198), its price per square foot is higher than 27% of them ($483 against a typical $529), it is bigger than 27% of them (1,368 ft² against a typical 1,741 ft²), its lot is bigger than 3% of them (0.13 ac against a typical 0.17 ac) and it is newer than 5% of them (1959 against a typical 1973). Measured against all of Los Angeles County, it is worth more than 28% 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 18203 Companario Dr, Rowland Heights, CA?

The 2025 property tax bill for 18203 Companario Dr, Rowland Heights, CA was $5,198. The county assessed it at $383,492.

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