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Single Family ResidenceResidential
$984,574$469 / 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 95How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026

18121 VIA CALMA

ROWLAND HEIGHTS, CA 91748
4
Beds
3
Baths
2,099 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.
0.14 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.

Valuation

$985K
$939K low$1M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,378 (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.$386,337 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$155,972
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$230,365
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$378,763

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.23 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.0.14
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
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(8)

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
Rowland Elementary SchoolD-
Elementary · Grades KG–6 · 0.3 mi
M
Alvarado Intermediate SchoolB
Middle · Grades 7–8 · 0.9 mi
H
John A. Rowland High SchoolA-
High · Grades 9–12 · 1.5 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

18121 Via Calma 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.

  • Costs less per square foot than 80% of homes in Rowland Heights 91748
  • Bigger than 72% of homes in Los Angeles County
  • Has a smaller lot than 77% of homes in Rowland Heights 91748
  • Newer than 82% of homes in Los Angeles County

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
$424K$1.8M

This home is worth more than 58% 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$984,574
CheaperTypical $917,783Pricier

Pricier than 58% of homes nearby

Price per ft²$469
CheaperTypical $522Pricier

Pricier than 20% of homes nearby

Living area2,099 ft²
SmallerTypical 1,746 ft²Bigger

Bigger than 62% of homes nearby

Lot size0.14 ac
SmallerTypical 0.17 acBigger

Bigger than 23% of homes nearby

Year built1986
OlderTypical 1973Newer

Newer than 77% of homes nearby

How 18121 Via Calma ranks against every home in each area.
MeasureThis homeRowland Heights 91748Los Angeles County
Estimated valuepricier than$984,57458% of homes63% of homes
Price per ft²pricier than$46920% of homes24% of homes
Living areabigger than2,099 ft²62% of homes72% of homes
Lot sizebigger than0.14 ac23% of homes32% of homes
Year builtnewer than198677% of homes82% of homes

About 18121 Via Calma

How much is 18121 Via Calma, Rowland Heights, CA worth?

The TopHap Estimate for 18121 Via Calma, Rowland Heights, CA is $984,574 as of Oct 21, 2026. The likely range is $938,717 to $1,030,431. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18121 Via Calma, Rowland Heights, CA last sell?

18121 Via Calma, Rowland Heights, CA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 18121 Via Calma, Rowland Heights, CA?

18121 Via Calma, Rowland Heights, CA has 4 bedrooms, 3 bathrooms, 2,099 square feet of living space and a 0.14-acre lot.

When was 18121 Via Calma, Rowland Heights, CA built?

18121 Via Calma, Rowland Heights, CA was built in 1986, making it 40 years old.

What schools serve 18121 Via Calma, Rowland Heights, CA?

18121 Via Calma, Rowland Heights, CA is assigned to Rowland Elementary School (elementary), rated D-; 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 18121 Via Calma, Rowland Heights, CA compare to other homes in Rowland Heights 91748?

Among the 10,811 homes in Rowland Heights 91748, it is worth more than 58% of them ($984,574 against a typical $917,783), its price per square foot is higher than 20% of them ($469 against a typical $522), it is bigger than 62% of them (2,099 ft² against a typical 1,746 ft²), its lot is bigger than 23% of them (0.14 ac against a typical 0.17 ac) and it is newer than 77% of them (1986 against a typical 1973). Measured against all of Los Angeles County, it is worth more than 63% 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 18121 Via Calma, Rowland Heights, CA?

The 2025 property tax bill for 18121 Via Calma, Rowland Heights, CA was $5,378. The county assessed it at $386,337.

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