Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$666,467$333 / 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 Jul 14, 2026
Last sold for $350,000 on Jan 16, 2018

420 UNION AVE

RIVERHEAD, NY 11901
5
Beds
2
Baths
2,004 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.
0.23 ac
Lot SizeThe size of the land the home sits on, from county records.
1922
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
10
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
1
ParkingThe number of parking spaces on the property, including the garage.
Pre-foreclosure (LIS)A foreclosure notice on this home is currently active. Many are worked out before any auction happens.
A foreclosure-related notice has been recorded for this property.

Valuation

$666K
$599K low$734K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$350,000 · Jan 16, 2018

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,260 (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.$46,500 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$7,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$38,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$569,853

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.30 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.71%
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
CountySUFFOLK
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.2017
Lot (acres)The size of the land the home sits on, from county records.0.23
HeatingThe type of heating system in the home.Hot Water
CoolingThe type of cooling or air conditioning in the home.Central
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
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 · 72 ft²

Transaction History(5)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Foreclosure Filings(1)

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

E
Roanoke Avenue SchoolD-
Elementary · Grades PK–4 · 0.3 mi
M
Riverhead Middle SchoolD
Middle · Grades 6–8 · 0.8 mi
H
Riverhead Senior High SchoolC-
High · Grades 9–12 · 1.0 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%

Owner Tools

Do you own this home?
Claim this home

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

420 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 65% of homes in Riverhead
  • Costs less per square foot than 87% of homes in Riverhead 11901
  • Bigger than 78% of homes in Riverhead
  • Has a smaller lot than 67% of homes in Riverhead 11901
  • Older than 97% 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
$353K$1.7M

This home is worth more than 56% 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$666,467
CheaperTypical $633,868Pricier

Pricier than 56% of homes nearby

Price per ft²$333
CheaperTypical $424Pricier

Pricier than 13% of homes nearby

Living area2,004 ft²
SmallerTypical 1,380 ft²Bigger

Bigger than 78% of homes nearby

Lot size0.23 ac
SmallerTypical 0.32 acBigger

Bigger than 33% of homes nearby

Year built1922
OlderTypical 1991Newer

Newer than 5% of homes nearby

How 420 Union Ave ranks against every home in each area.
MeasureThis homeRiverheadRiverhead 11901Suffolk County
Estimated valuepricier than$666,46765% of homes56% of homes43% of homes
Price per ft²pricier than$33319% of homes13% of homes19% of homes
Living areabigger than2,004 ft²78% of homes78% of homes67% of homes
Lot sizebigger than0.23 ac37% of homes33% of homes38% of homes
Year builtnewer than192210% of homes5% of homes3% of homes

About 420 Union Ave

How much is 420 Union Ave, Riverhead, NY worth?

The TopHap Estimate for 420 Union Ave, Riverhead, NY is $666,467 as of Jul 14, 2026. The likely range is $599,000 to $733,933. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 420 Union Ave, Riverhead, NY last sell?

420 Union Ave, Riverhead, NY last sold on Jan 16, 2018 for $350,000, according to the county's recorded deed. TopHap holds 4 recorded sales for this parcel.

How big is 420 Union Ave, Riverhead, NY?

420 Union Ave, Riverhead, NY has 5 bedrooms, 2 bathrooms, 2,004 square feet of living space and a 0.23-acre lot.

When was 420 Union Ave, Riverhead, NY built?

420 Union Ave, Riverhead, NY was built in 1922, making it 104 years old. The building has 2 stories.

What schools serve 420 Union Ave, Riverhead, NY?

420 Union Ave, Riverhead, NY is assigned to Roanoke Avenue 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 420 Union Ave, Riverhead, NY compare to other homes in Riverhead 11901?

Among the 9,718 homes in Riverhead 11901, it is worth more than 56% of them ($666,467 against a typical $633,868), its price per square foot is higher than 13% of them ($333 against a typical $424), it is bigger than 78% of them (2,004 ft² against a typical 1,380 ft²), its lot is bigger than 33% of them (0.23 ac against a typical 0.32 ac) and it is newer than 5% of them (1922 against a typical 1991). Measured against all of Suffolk County, it is worth more than 43% 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 420 Union Ave, Riverhead, NY?

The 2024 property tax bill for 420 Union Ave, Riverhead, NY was $10,260. The county assessed it at $46,500.

More homes on Union Ave

Closest homes

More homes in Riverhead 11901

Assigned schools

Explore the area

See this home in context

Open 420 Union Ave on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map