Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$618,868$340 / 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 93How 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 $278,000 on Jan 9, 2014

21 PROSPECT PL

RIVERHEAD, NY 11901
3
Beds
1.5
Baths
1,820 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.
0.41 ac
Lot SizeThe size of the land the home sits on, from county records.
1940
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
7
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.

Valuation

$619K
$577K low$660K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$278,000 · Jan 9, 2014

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,911 (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.$33,200 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$9,400
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$23,800
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$406,863

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountySUFFOLK
Lot (acres)The size of the land the home sits on, from county records.0.41
HeatingThe type of heating system in the home.Yes
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 · 54 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
Roanoke Avenue SchoolD-
Elementary · Grades PK–4 · 0.6 mi
M
Riverhead Middle SchoolD
Middle · Grades 6–8 · 1.1 mi
H
Riverhead Senior High SchoolC-
High · Grades 9–12 · 1.3 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%

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

21 Prospect 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 less than 66% of homes in Suffolk County
  • Costs less per square foot than 81% of homes in Riverhead 11901
  • Bigger than 71% of homes in Riverhead 11901
  • Has a bigger lot than 73% of homes in Riverhead
  • Older than 91% 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
$348K$1.8M

This home is worth more than 51% 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$618,868
CheaperTypical $614,813Pricier

Pricier than 51% of homes nearby

Price per ft²$340
CheaperTypical $413Pricier

Pricier than 19% of homes nearby

Living area1,820 ft²
SmallerTypical 1,374 ft²Bigger

Bigger than 71% of homes nearby

Lot size0.41 ac
SmallerTypical 0.31 acBigger

Bigger than 62% of homes nearby

Year built1940
OlderTypical 1991Newer

Newer than 12% of homes nearby

How 21 Prospect Pl ranks against every home in each area.
MeasureThis homeRiverheadRiverhead 11901Suffolk County
Estimated valuepricier than$618,86862% of homes51% of homes34% of homes
Price per ft²pricier than$34028% of homes19% of homes24% of homes
Living areabigger than1,820 ft²69% of homes71% of homes57% of homes
Lot sizebigger than0.41 ac73% of homes62% of homes67% of homes
Year builtnewer than194021% of homes12% of homes9% of homes

About 21 Prospect Pl

How much is 21 Prospect Pl, Riverhead, NY worth?

The TopHap Estimate for 21 Prospect Pl, Riverhead, NY is $618,868 as of Aug 30, 2026. The likely range is $577,320 to $660,416. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Prospect Pl, Riverhead, NY last sell?

21 Prospect Pl, Riverhead, NY last sold on Jan 9, 2014 for $278,000, according to the county's recorded deed.

How big is 21 Prospect Pl, Riverhead, NY?

21 Prospect Pl, Riverhead, NY has 3 bedrooms, 1.5 bathrooms, 1,820 square feet of living space and a 0.41-acre lot.

When was 21 Prospect Pl, Riverhead, NY built?

21 Prospect Pl, Riverhead, NY was built in 1940, making it 86 years old. The building has 2 stories.

What schools serve 21 Prospect Pl, Riverhead, NY?

21 Prospect Pl, 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 21 Prospect Pl, Riverhead, NY compare to other homes in Riverhead 11901?

Among the 9,718 homes in Riverhead 11901, it is worth more than 51% of them ($618,868 against a typical $614,813), its price per square foot is higher than 19% of them ($340 against a typical $413), it is bigger than 71% of them (1,820 ft² against a typical 1,374 ft²), its lot is bigger than 62% of them (0.41 ac against a typical 0.31 ac) and it is newer than 12% of them (1940 against a typical 1991). Measured against all of Suffolk County, it is worth more than 34% 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 21 Prospect Pl, Riverhead, NY?

The 2024 property tax bill for 21 Prospect Pl, Riverhead, NY was $7,911. The county assessed it at $33,200.

More homes on Prospect Pl

Closest homes

More homes in Riverhead 11901

Assigned schools

Explore the area

See this home in context

Open 21 Prospect Pl 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