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Single Family ResidenceResidential
$108,997$118 / 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 91How 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

421 PORTSMOUTH DR

SLIDELL, LA 70460
0
Baths
924 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.
1997
Year BuiltThe year the home was originally built, according to county records.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$109K
$99K low$119K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,081 (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.$8,294 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$6,794
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$8,294
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$82,938

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.90 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.45%
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
Lot (acres)The size of the land the home sits on, from county records.0.17
PoolWhether the property has a pool, and what kind, such as in-ground.No

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

E
Bayou Woods Elementary SchoolC
Elementary · Grades PK–3 · 0.5 mi
M
Slidell Junior High SchoolC+
Middle · Grades 7–8 · 2.2 mi
H
Slidell High SchoolC+
High · Grades 9–12 · 2.5 mi

District: St. Tammany Parish School District

Neighborhood · ZIP 70460These 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.119
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 100.30

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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.11%
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.1.0%
PopulationHow many people live in this area.23,168
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.530 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$61,606
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$75,236
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

421 Portsmouth 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 96% of homes in Saint Tammany County
  • Costs less per square foot than 79% of homes in Saint Tammany County
  • Smaller than 97% of homes in Saint Tammany County
  • Has a smaller lot than 95% of homes in Saint Tammany County

What homes are worth in Slidell 70460

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

This home
$50K$438K

This home is worth more than 10% of homes in Slidell 70460.

How it measures up in Slidell 70460

The dot is this home. The mark in the middle is the typical home in Slidell 70460.

Estimated value$108,997
CheaperTypical $183,847Pricier

Pricier than 10% of homes nearby

Price per ft²$118
CheaperTypical $114Pricier

Pricier than 57% of homes nearby

Living area924 ft²
SmallerTypical 1,590 ft²Bigger

Bigger than 4% of homes nearby

Lot size0.17 ac
SmallerTypical 1 acBigger

Bigger than 10% of homes nearby

Year built1997
OlderTypical 1997Newer

Newer than 50% of homes nearby

How 421 Portsmouth Dr ranks against every home in each area.
MeasureThis homeSlidell 70460Saint Tammany County
Estimated valuepricier than$108,99710% of homes4% of homes
Price per ft²pricier than$11857% of homes21% of homes
Living areabigger than924 ft²4% of homes3% of homes
Lot sizebigger than0.17 ac10% of homes5% of homes
Year builtnewer than199750% of homes48% of homes

About 421 Portsmouth Dr

How much is 421 Portsmouth Dr, Slidell, LA worth?

The TopHap Estimate for 421 Portsmouth Dr, Slidell, LA is $108,997 as of Jul 14, 2026. The likely range is $98,698 to $119,296. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 421 Portsmouth Dr, Slidell, LA last sell?

421 Portsmouth Dr, Slidell, LA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 421 Portsmouth Dr, Slidell, LA?

421 Portsmouth Dr, Slidell, LA has 924 square feet of living space and a 0.17-acre lot.

When was 421 Portsmouth Dr, Slidell, LA built?

421 Portsmouth Dr, Slidell, LA was built in 1997, making it 29 years old.

What schools serve 421 Portsmouth Dr, Slidell, LA?

421 Portsmouth Dr, Slidell, LA is assigned to Bayou Woods Elementary School (elementary), rated C; Slidell Junior High School (middle), rated C+; Slidell High School (high), rated C+. All sit in St. Tammany Parish School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 421 Portsmouth Dr, Slidell, LA compare to other homes in Slidell 70460?

Among the 8,290 homes in Slidell 70460, it is worth more than 10% of them ($108,997 against a typical $183,847), its price per square foot is higher than 57% of them ($118 against a typical $114), it is bigger than 4% of them (924 ft² against a typical 1,590 ft²), its lot is bigger than 10% of them (0.17 ac against a typical 1 ac) and it is newer than 50% of them (1997 against a typical 1997). Measured against all of Saint Tammany County, it is worth more than 4% 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 421 Portsmouth Dr, Slidell, LA?

The 2025 property tax bill for 421 Portsmouth Dr, Slidell, LA was $1,081. The county assessed it at $8,294.

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