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Single Family ResidenceResidential
$1,413,808$1,170 / 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 $739,000 on Mar 7, 2017

509 RIVIERA DR

SEAL BEACH, CA 90740
3
Beds
2
Baths
1,208 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.
0.12 ac
Lot SizeThe size of the land the home sits on, from county records.
1957
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.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.4M
$1.4M low$1.5M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$739,000 · Mar 7, 2017

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$12,649 (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.$1,112,766 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,044,263
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$68,503
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,090,948

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.0.12
HeatingThe type of heating system in the home.Yes
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.

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

E
McGaugh Elementary SchoolB+
Elementary · Grades KG–5 · 0.1 mi
H
Los Alamitos High SchoolA+
High · Grades 9–12 · 4.9 mi
M
McAuliffe Middle SchoolB
Middle · Grades 6–8 · 5.0 mi

District: Los Alamitos Unified School District

Neighborhood · ZIP 90740These 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.118
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.109
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.425

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.91%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.30%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.6%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.8%
PopulationHow many people live in this area.25,304
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,911 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$93,164
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$123,678
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

509 Riviera 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 78% of homes in Marina Hill
  • Costs more per square foot than 96% of homes in Marina Hill
  • Smaller than 95% of homes in Marina Hill
  • Has a smaller lot than 72% of homes in Orange County
  • Older than 86% of homes in Seal Beach 90740

What homes are worth in Seal Beach 90740

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

This home
$403K$3M

This home is worth more than 48% of homes in Seal Beach 90740.

How it measures up in Seal Beach 90740

The dot is this home. The mark in the middle is the typical home in Seal Beach 90740.

Estimated value$1,413,808
CheaperTypical $1,428,905Pricier

Pricier than 48% of homes nearby

Price per ft²$1170
CheaperTypical $684Pricier

Pricier than 93% of homes nearby

Living area1,208 ft²
SmallerTypical 1,992 ft²Bigger

Bigger than 15% of homes nearby

Lot size0.12 ac
SmallerTypical 0.12 acBigger

Bigger than 65% of homes nearby

Year built1957
OlderTypical 1968Newer

Newer than 14% of homes nearby

How 509 Riviera Dr ranks against every home in each area.
MeasureThis homeMarina HillSeal Beach 90740Orange County
Estimated valuepricier than$1,413,80822% of homes48% of homes73% of homes
Price per ft²pricier than$117096% of homes93% of homes96% of homes
Living areabigger than1,208 ft²5% of homes15% of homes18% of homes
Lot sizebigger than0.12 ac42% of homes65% of homes28% of homes
Year builtnewer than195721% of homes14% of homes15% of homes

About 509 Riviera Dr

How much is 509 Riviera Dr, Seal Beach, CA worth?

The TopHap Estimate for 509 Riviera Dr, Seal Beach, CA is $1,413,808 as of Jul 14, 2026. The likely range is $1,356,246 to $1,471,370. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 509 Riviera Dr, Seal Beach, CA last sell?

509 Riviera Dr, Seal Beach, CA last sold on Mar 7, 2017 for $739,000, according to the county's recorded deed.

How big is 509 Riviera Dr, Seal Beach, CA?

509 Riviera Dr, Seal Beach, CA has 3 bedrooms, 2 bathrooms, 1,208 square feet of living space and a 0.12-acre lot.

When was 509 Riviera Dr, Seal Beach, CA built?

509 Riviera Dr, Seal Beach, CA was built in 1957, making it 69 years old. The building has 1 story.

What schools serve 509 Riviera Dr, Seal Beach, CA?

509 Riviera Dr, Seal Beach, CA is assigned to McGaugh Elementary School (elementary), rated B+; Los Alamitos High School (high), rated A+; McAuliffe Middle School (middle), rated B. All sit in Los Alamitos Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 509 Riviera Dr, Seal Beach, CA compare to other homes in Seal Beach 90740?

Among the 5,609 homes in Seal Beach 90740, it is worth more than 48% of them ($1,413,808 against a typical $1,428,905), its price per square foot is higher than 93% of them ($1170 against a typical $684), it is bigger than 15% of them (1,208 ft² against a typical 1,992 ft²), its lot is bigger than 65% of them (0.12 ac against a typical 0.12 ac) and it is newer than 14% of them (1957 against a typical 1968). Measured against all of Orange County, it is worth more than 73% 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 509 Riviera Dr, Seal Beach, CA?

The 2025 property tax bill for 509 Riviera Dr, Seal Beach, CA was $12,649. The county assessed it at $1,112,766.

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