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Single Family ResidenceResidential
$235,510$147 / 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 80How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $3,011,391

40140 ONYX ST

SLIDELL, LA 70461
0
Baths
1,598 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.
1958
Year BuiltThe year the home was originally built, according to county records.

Valuation

$236K
$189K low$282K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$3,011,391

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$763 (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.$12,994 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$3,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$9,494
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$12,994
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$129,940

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.37 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.52%
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.area not mapped

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
CountySaint Tammany
HeatingThe type of heating system in the home.None

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

M
Boyet Junior High SchoolB
Middle · Grades 7–8 · 0.4 mi
E
Cypress Cove Elementary School
Elementary · Grades PK–1 · 1.6 mi
H
Northshore High SchoolA
High · Grades 9–12 · 1.8 mi

District: St. Tammany Parish School District

Neighborhood · ZIP 70461These 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.97
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.87
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.27

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.93%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.20%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.11%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.1%
PopulationHow many people live in this area.31,940
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.299 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$89,933
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$117,701
Average tempThe average temperature here across a full year.68°F
Annual precipHow much rain and melted snow falls here in a typical year.64 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

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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

40140 Onyx 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.

  • Costs more per square foot than 79% of homes in Slidell 70461
  • Smaller than 75% of homes in Slidell 70461
  • Older than 95% of homes in Saint Tammany County

What homes are worth in Slidell 70461

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

This home
$101K$782K

This home is worth more than 39% of homes in Slidell 70461.

How it measures up in Slidell 70461

The dot is this home. The mark in the middle is the typical home in Slidell 70461.

Estimated value$235,510
CheaperTypical $261,281Pricier

Pricier than 39% of homes nearby

Price per ft²$147
CheaperTypical $128Pricier

Pricier than 79% of homes nearby

Living area1,598 ft²
SmallerTypical 2,067 ft²Bigger

Bigger than 25% of homes nearby

Year built1958
OlderTypical 2000Newer

Newer than 7% of homes nearby

How 40140 Onyx St ranks against every home in each area.
MeasureThis homeSlidell 70461Saint Tammany County
Estimated valuepricier than$235,51039% of homes36% of homes
Price per ft²pricier than$14779% of homes46% of homes
Living areabigger than1,598 ft²25% of homes31% of homes
Year builtnewer than19587% of homes5% of homes

About 40140 Onyx St

How much is 40140 Onyx St, Slidell, LA worth?

The TopHap Estimate for 40140 Onyx St, Slidell, LA is $235,510 as of Aug 30, 2026. The likely range is $188,592 to $282,428. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 40140 Onyx St, Slidell, LA last sell?

40140 Onyx St, Slidell, LA last sold for $3,011,391, according to the county's recorded deed.

When was 40140 Onyx St, Slidell, LA built?

40140 Onyx St, Slidell, LA was built in 1958, making it 68 years old.

What schools serve 40140 Onyx St, Slidell, LA?

40140 Onyx St, Slidell, LA is assigned to Boyet Junior High School (middle), rated B; Cypress Cove Elementary School (elementary); Northshore High School (high), rated A. All sit in St. Tammany Parish School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 40140 Onyx St, Slidell, LA compare to other homes in Slidell 70461?

Among the 11,840 homes in Slidell 70461, it is worth more than 39% of them ($235,510 against a typical $261,281), its price per square foot is higher than 79% of them ($147 against a typical $128), it is bigger than 25% of them (1,598 ft² against a typical 2,067 ft²) and it is newer than 7% of them (1958 against a typical 2000). Measured against all of Saint Tammany County, it is worth more than 36% 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 40140 Onyx St, Slidell, LA?

The 2025 property tax bill for 40140 Onyx St, Slidell, LA was $763. The county assessed it at $12,994.

More homes on Onyx St

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Assigned schools

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