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Single Family ResidenceResidential
$1,219,812$545 / 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
Last sold for $800,000 on May 26, 2017

10491 SIERRA CIR

LOS ALAMITOS, CA 90720
4
Beds
2.5
Baths
2,240 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.
0.17 ac
Lot SizeThe size of the land the home sits on, from county records.
1977
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
8
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.2M
$1.1M low$1.3M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$800,000 · May 26, 2017

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,787 (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.$947,036 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$738,395
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$208,641
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$928,467

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.13 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%
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.1 percent flood zone

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
CountyORANGE
Lot (acres)The size of the land the home sits on, from county records.0.17
HeatingThe type of heating system in the home.Yes
CoolingThe type of cooling or air conditioning in the home.Central
PoolWhether the property has a pool, and what kind, such as in-ground.Yes

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.

M
McAuliffe Middle SchoolA
Middle · Grades 6–8 · 0.2 mi
H
Los Alamitos High SchoolA
High · Grades 9–12 · 0.3 mi
E
Los Alamitos Elementary SchoolA
Elementary · Grades KG–5 · 0.3 mi

District: Los Alamitos Unified School District

Neighborhood · ZIP 90720These 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.64
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.104
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.370

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.5.0%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.21,327
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,707 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$132,372
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$182,538
Average tempThe average temperature here across a full year.63°F
Annual precipHow much rain and melted snow falls here in a typical year.12 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.75%

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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

10491 Sierra Cir 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 69% of homes in Los Alamitos 90720
  • Costs less per square foot than 89% of homes in Los Alamitos 90720
  • Bigger than 71% of homes in Orange County
  • Has a smaller lot than 71% of homes in Los Alamitos 90720
  • Newer than 73% of homes in Los Alamitos 90720

What homes are worth in Los Alamitos 90720

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

This home
$699K$2.9M

This home is worth more than 31% of homes in Los Alamitos 90720.

How it measures up in Los Alamitos 90720

The dot is this home. The mark in the middle is the typical home in Los Alamitos 90720.

Estimated value$1,219,812
CheaperTypical $1,386,724Pricier

Pricier than 31% of homes nearby

Price per ft²$545
CheaperTypical $689Pricier

Pricier than 11% of homes nearby

Living area2,240 ft²
SmallerTypical 1,973 ft²Bigger

Bigger than 65% of homes nearby

Lot size0.17 ac
SmallerTypical 0.18 acBigger

Bigger than 29% of homes nearby

Year built1977
OlderTypical 1960Newer

Newer than 73% of homes nearby

How 10491 Sierra Cir ranks against every home in each area.
MeasureThis homeLos Alamitos 90720Orange County
Estimated valuepricier than$1,219,81231% of homes56% of homes
Price per ft²pricier than$54511% of homes18% of homes
Living areabigger than2,240 ft²65% of homes71% of homes
Lot sizebigger than0.17 ac29% of homes70% of homes
Year builtnewer than197773% of homes56% of homes

About 10491 Sierra Cir

How much is 10491 Sierra Cir, Los Alamitos, CA worth?

The TopHap Estimate for 10491 Sierra Cir, Los Alamitos, CA is $1,219,812 as of Sep 24, 2026. The likely range is $1,146,373 to $1,293,251. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 10491 Sierra Cir, Los Alamitos, CA last sell?

10491 Sierra Cir, Los Alamitos, CA last sold on May 26, 2017 for $800,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 10491 Sierra Cir, Los Alamitos, CA?

10491 Sierra Cir, Los Alamitos, CA has 4 bedrooms, 2.5 bathrooms, 2,240 square feet of living space and a 0.17-acre lot.

When was 10491 Sierra Cir, Los Alamitos, CA built?

10491 Sierra Cir, Los Alamitos, CA was built in 1977, making it 49 years old. The building has 2 stories.

What schools serve 10491 Sierra Cir, Los Alamitos, CA?

10491 Sierra Cir, Los Alamitos, CA is assigned to McAuliffe Middle School (middle), rated A; Los Alamitos High School (high), rated A; Los Alamitos Elementary School (elementary), rated A. All sit in Los Alamitos Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 10491 Sierra Cir, Los Alamitos, CA compare to other homes in Los Alamitos 90720?

Among the 6,558 homes in Los Alamitos 90720, it is worth more than 31% of them ($1,219,812 against a typical $1,386,724), its price per square foot is higher than 11% of them ($545 against a typical $689), it is bigger than 65% of them (2,240 ft² against a typical 1,973 ft²), its lot is bigger than 29% of them (0.17 ac against a typical 0.18 ac) and it is newer than 73% of them (1977 against a typical 1960). Measured against all of Orange County, it is worth more than 56% 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 10491 Sierra Cir, Los Alamitos, CA?

The 2025 property tax bill for 10491 Sierra Cir, Los Alamitos, CA was $10,787. The county assessed it at $947,036.

More homes on Sierra Cir

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