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Single Family ResidenceResidential
$3,048,441$565 / 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
Last sold for $1,935,000 on Dec 8, 2021

423 RIVER RD

SAINT JAMES, NY 11780
5
Beds
6
Baths
5,400 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.
3 ac
Lot SizeThe size of the land the home sits on, from county records.
1982
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$3M
$2.8M low$3.3M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,935,000 · Dec 8, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$53,030 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$25,760 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$24,560
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$3,220,000

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Contemporary
CountySUFFOLK
HeatingThe type of heating system in the home.Hot Water
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, Basement
PoolWhether the property has a pool, and what kind, such as in-ground.Yes
ViewThe type of view from the property, or another feature of the site that affects value.Suburban
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 1,258 ft²Greenhouse

Transaction History(1)

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
Nesaquake Middle SchoolB
Middle · Grades 6–8 · 1.1 mi
H
Smithtown High School EastA+
High · Grades 9–12 · 1.7 mi
E
Saint James Elementary SchoolB-
Elementary · Grades KG–5 · 1.8 mi

District: Smithtown Central School District

Neighborhood · ZIP 11780These 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.37
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.107
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.71

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.28%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.0%
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.16,050
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,043 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$149,578
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$186,897
Average tempThe average temperature here across a full year.52°F
Annual precipHow much rain and melted snow falls here in a typical year.48 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

423 River Rd 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.

  • Among the most valuable homes in Saint James 11780
  • Costs more per square foot than 81% of homes in Suffolk County
  • Among the largest homes in Suffolk County
  • Among the largest lots in Suffolk County
  • Newer than 66% of homes in Suffolk County

What homes are worth in Saint James 11780

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

This home
$442K$2.7M

This home is worth more than almost all homes in Saint James 11780.

How it measures up in Saint James 11780

The dot is this home. The mark in the middle is the typical home in Saint James 11780.

Estimated value$3,048,441
CheaperTypical $842,970Pricier

Pricier than almost all homes nearby

Price per ft²$565
CheaperTypical $455Pricier

Pricier than 80% of homes nearby

Living area5,400 ft²
SmallerTypical 2,160 ft²Bigger

Bigger than 97% of homes nearby

Lot size3 ac
SmallerTypical 0.47 acBigger

Bigger than 97% of homes nearby

Year built1982
OlderTypical 1972Newer

Newer than 62% of homes nearby

How 423 River Rd ranks against every home in each area.
MeasureThis homeSaint James 11780Suffolk County
Estimated valuepricier than$3,048,441almost all homes97% of homes
Price per ft²pricier than$56580% of homes81% of homes
Living areabigger than5,400 ft²97% of homesalmost all homes
Lot sizebigger than3 ac97% of homesalmost all homes
Year builtnewer than198262% of homes66% of homes

About 423 River Rd

How much is 423 River Rd, Saint James, NY worth?

The TopHap Estimate for 423 River Rd, Saint James, NY is $3,048,441 as of Jul 14, 2026. The likely range is $2,774,953 to $3,321,929. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 423 River Rd, Saint James, NY last sell?

423 River Rd, Saint James, NY last sold on Dec 8, 2021 for $1,935,000, according to the county's recorded deed.

How big is 423 River Rd, Saint James, NY?

423 River Rd, Saint James, NY has 5 bedrooms, 6 bathrooms and 5,400 square feet of living space.

When was 423 River Rd, Saint James, NY built?

423 River Rd, Saint James, NY was built in 1982, making it 44 years old. It is a contemporary home. The building has 2 stories.

What schools serve 423 River Rd, Saint James, NY?

423 River Rd, Saint James, NY is assigned to Nesaquake Middle School (middle), rated B; Smithtown High School East (high), rated A+; Saint James Elementary School (elementary), rated B-. All sit in Smithtown Central School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 423 River Rd, Saint James, NY compare to other homes in Saint James 11780?

Among the 5,598 homes in Saint James 11780, it is worth more than almost all of them ($3,048,441 against a typical $842,970), its price per square foot is higher than 80% of them ($565 against a typical $455), it is bigger than 97% of them (5,400 ft² against a typical 2,160 ft²), its lot is bigger than 97% of them (3 ac against a typical 0.47 ac) and it is newer than 62% of them (1982 against a typical 1972). Measured against all of Suffolk County, it is worth more than 97% 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 423 River Rd, Saint James, NY?

The 2024 property tax bill for 423 River Rd, Saint James, NY was $53,030. The county assessed it at $25,760.

More homes on River Rd

Closest homes

More homes in Saint James 11780

Assigned schools

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