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Single Family ResidenceResidential
$878,749$432 / 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 Aug 30, 2026
Last sold for $500,000 on Nov 18, 2014

939 UNION AVE

RIVERHEAD, NY 11901
3
Beds
2
Baths
2,032 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.
5 ac
Lot SizeThe size of the land the home sits on, from county records.
1987
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
5
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

$879K
$794K low$963K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$500,000 · Nov 18, 2014

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,944 (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.$72,900 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$29,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$43,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$893,382

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.93 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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
StyleThe architectural style of the home, such as ranch or colonial.Rustic
CountySUFFOLK
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.No Foundation
HeatingThe type of heating system in the home.Hot Water
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No
ViewThe type of view from the property, or another feature of the site that affects value.Canal
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 440 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
Aquebogue Elementary SchoolD+
Elementary · Grades PK–5 · 0.8 mi
M
Riverhead Middle SchoolD
Middle · Grades 6–8 · 2.3 mi
H
Riverhead Senior High SchoolC-
High · Grades 9–12 · 2.3 mi

District: Riverhead Central School District

Neighborhood · ZIP 11901These 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.129
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 100.50

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.90%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.14%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.10%
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.29,638
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.531 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$77,609
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$107,711
Average tempThe average temperature here across a full year.52°F
Annual precipHow much rain and melted snow falls here in a typical year.47 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

939 Union Ave 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 84% of homes in Riverhead 11901
  • Bigger than 78% of homes in Riverhead 11901
  • Among the largest lots in Riverhead 11901
  • Newer than 72% of homes in Suffolk County

What homes are worth in Riverhead 11901

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

This home
$343K$1.9M

This home is worth more than 84% of homes in Riverhead 11901.

How it measures up in Riverhead 11901

The dot is this home. The mark in the middle is the typical home in Riverhead 11901.

Estimated value$878,749
CheaperTypical $613,628Pricier

Pricier than 84% of homes nearby

Price per ft²$432
CheaperTypical $414Pricier

Pricier than 58% of homes nearby

Living area2,032 ft²
SmallerTypical 1,374 ft²Bigger

Bigger than 78% of homes nearby

Lot size5 ac
SmallerTypical 0.31 acBigger

Bigger than almost all homes nearby

Year built1987
OlderTypical 1991Newer

Newer than 40% of homes nearby

How 939 Union Ave ranks against every home in each area.
MeasureThis homeNorthvilleRiverhead 11901Suffolk County
Estimated valuepricier than$878,74957% of homes84% of homes73% of homes
Price per ft²pricier than$43261% of homes58% of homes57% of homes
Living areabigger than2,032 ft²55% of homes78% of homes68% of homes
Lot sizebigger than5 acalmost all homesalmost all homesalmost all homes
Year builtnewer than198733% of homes40% of homes72% of homes

About 939 Union Ave

How much is 939 Union Ave, Riverhead, NY worth?

The TopHap Estimate for 939 Union Ave, Riverhead, NY is $878,749 as of Aug 30, 2026. The likely range is $794,190 to $963,308. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 939 Union Ave, Riverhead, NY last sell?

939 Union Ave, Riverhead, NY last sold on Nov 18, 2014 for $500,000, according to the county's recorded deed.

How big is 939 Union Ave, Riverhead, NY?

939 Union Ave, Riverhead, NY has 3 bedrooms, 2 bathrooms and 2,032 square feet of living space.

When was 939 Union Ave, Riverhead, NY built?

939 Union Ave, Riverhead, NY was built in 1987, making it 39 years old. It is a rustic home. The building has 1 story.

What schools serve 939 Union Ave, Riverhead, NY?

939 Union Ave, Riverhead, NY is assigned to Aquebogue Elementary School (elementary), rated D+; Riverhead Middle School (middle), rated D; Riverhead Senior High School (high), rated C-. All sit in Riverhead Central School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 939 Union Ave, Riverhead, NY compare to other homes in Riverhead 11901?

Among the 9,718 homes in Riverhead 11901, it is worth more than 84% of them ($878,749 against a typical $613,628), its price per square foot is higher than 58% of them ($432 against a typical $414), it is bigger than 78% of them (2,032 ft² against a typical 1,374 ft²), its lot is bigger than almost all of them (5 ac against a typical 0.31 ac) and it is newer than 40% of them (1987 against a typical 1991). Measured against all of Suffolk 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 939 Union Ave, Riverhead, NY?

The 2024 property tax bill for 939 Union Ave, Riverhead, NY was $9,944. The county assessed it at $72,900.

More homes on Union Ave

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Assigned schools

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