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Single Family ResidenceResidential
$348,509$268 / 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 90How 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

4327 PORTLAND PL

ARNOLD, MO 63010
1.5
Baths
1,300 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.
2.07 ac
Lot SizeThe size of the land the home sits on, from county records.
1985
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$349K
$313K low$384K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,350 (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.$34,000 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$3,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$30,700
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$31,300
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$179,100

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.45
10
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
41
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
87
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
79
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
8
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.6 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.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
CountyJEFFERSON
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Patio · 180 ft²Porch · 40 ft²

Transaction History(2)

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
Lone Dell Elementary SchoolA-
Elementary · Grades KG–5 · 1.2 mi
M
Seckman Middle SchoolA-
Middle · Grades 6–8 · 1.5 mi
H
Seckman High SchoolB+
High · Grades 9–12 · 1.7 mi

District: Fox C-6 School District

Neighborhood · ZIP 63010These 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.93
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.90
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.154

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.19%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.7%
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.35,823
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,671 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$78,859
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$90,374
Average tempThe average temperature here across a full year.55°F
Annual precipHow much rain and melted snow falls here in a typical year.41 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.57%

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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

4327 Portland Pl 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 more than 81% of homes in Arnold 63010
  • Costs more per square foot than 84% of homes in Jefferson County
  • Has a bigger lot than 96% of homes in Arnold 63010

What homes are worth in Arnold 63010

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

This home
$164K$499K

This home is worth more than 81% of homes in Arnold 63010.

How it measures up in Arnold 63010

The dot is this home. The mark in the middle is the typical home in Arnold 63010.

Estimated value$348,509
CheaperTypical $261,492Pricier

Pricier than 81% of homes nearby

Price per ft²$268
CheaperTypical $217Pricier

Pricier than 83% of homes nearby

Living area1,300 ft²
SmallerTypical 1,222 ft²Bigger

Bigger than 58% of homes nearby

Lot size2.07 ac
SmallerTypical 0.25 acBigger

Bigger than 96% of homes nearby

Year built1985
OlderTypical 1984Newer

Newer than 52% of homes nearby

How 4327 Portland Pl ranks against every home in each area.
MeasureThis homeArnold 63010Jefferson County
Estimated valuepricier than$348,50981% of homes72% of homes
Price per ft²pricier than$26883% of homes84% of homes
Living areabigger than1,300 ft²58% of homes47% of homes
Lot sizebigger than2.07 ac96% of homes79% of homes
Year builtnewer than198552% of homes46% of homes

About 4327 Portland Pl

How much is 4327 Portland Pl, Arnold, MO worth?

The TopHap Estimate for 4327 Portland Pl, Arnold, MO is $348,509 as of Oct 21, 2026. The likely range is $312,952 to $384,066. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4327 Portland Pl, Arnold, MO last sell?

4327 Portland Pl, Arnold, MO last sold on Mar 11, 1999, according to the county's recorded deed.

How big is 4327 Portland Pl, Arnold, MO?

4327 Portland Pl, Arnold, MO has 1.5 bathrooms and 1,300 square feet of living space.

When was 4327 Portland Pl, Arnold, MO built?

4327 Portland Pl, Arnold, MO was built in 1985, making it 41 years old. The building has 1 story.

What schools serve 4327 Portland Pl, Arnold, MO?

4327 Portland Pl, Arnold, MO is assigned to Lone Dell Elementary School (elementary), rated A-; Seckman Middle School (middle), rated A-; Seckman High School (high), rated B+. All sit in Fox C-6 School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4327 Portland Pl, Arnold, MO compare to other homes in Arnold 63010?

Among the 12,298 homes in Arnold 63010, it is worth more than 81% of them ($348,509 against a typical $261,492), its price per square foot is higher than 83% of them ($268 against a typical $217), it is bigger than 58% of them (1,300 ft² against a typical 1,222 ft²), its lot is bigger than 96% of them (2.07 ac against a typical 0.25 ac) and it is newer than 52% of them (1985 against a typical 1984). Measured against all of Jefferson County, it is worth more than 72% 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 4327 Portland Pl, Arnold, MO?

The 2025 property tax bill for 4327 Portland Pl, Arnold, MO was $2,350. The county assessed it at $34,000.

More homes on Portland Pl

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Assigned schools

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