Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$614,455$265 / 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 95How 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 $98,750 on Dec 1, 2017

100 ROSEMONT AVE

FARMINGVILLE, NY 11738
4
Beds
2
Baths
2,315 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.
1971
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
8
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$614K
$586K low$643K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$98,750 · Dec 1, 2017
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$0
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$0
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.125%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$750,000
BETHPAGE FCU · recorded Sep 29, 2023
2nd MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$39,000
BETHPAGE FCU

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,588 (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.$2,520 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$250
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$2,270
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$525,000

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.Cape Cod
CountySUFFOLK
Lot (acres)The size of the land the home sits on, from county records.0.23
HeatingThe type of heating system in the home.Radiant
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.Waterfront

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.

H
Sachem High School EastB+
High · Grades 9–12 · 0.6 mi
E
Lynwood Avenue Elementary SchoolC-
Elementary · Grades KG–5 · 0.7 mi
M
Sagamore Middle SchoolB
Middle · Grades 6–8 · 2.1 mi

District: Sachem Central School District

Neighborhood · ZIP 11738These 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.36
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.104
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.65

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.97%
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.3.2%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.16,570
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,262 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$125,315
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$152,500
Average tempThe average temperature here across a full year.52°F
Annual precipHow much rain and melted snow falls here in a typical year.49 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

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

100 Rosemont 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 less than 69% of homes in Suffolk County
  • Costs less per square foot than 96% of homes in Suffolk County
  • Bigger than 79% of homes in Farmingville 11738
  • Has a smaller lot than 71% of homes in Farmingville 11738

What homes are worth in Farmingville 11738

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

This home
$383K$907K

This home is worth more than 46% of homes in Farmingville 11738.

How it measures up in Farmingville 11738

The dot is this home. The mark in the middle is the typical home in Farmingville 11738.

Estimated value$614,455
CheaperTypical $622,257Pricier

Pricier than 46% of homes nearby

Price per ft²$265
CheaperTypical $351Pricier

Pricier than 10% of homes nearby

Living area2,315 ft²
SmallerTypical 1,800 ft²Bigger

Bigger than 79% of homes nearby

Lot size0.23 ac
SmallerTypical 0.3 acBigger

Bigger than 29% of homes nearby

Year built1971
OlderTypical 1970Newer

Newer than 62% of homes nearby

How 100 Rosemont Ave ranks against every home in each area.
MeasureThis homeFarmingville 11738Suffolk County
Estimated valuepricier than$614,45546% of homes31% of homes
Price per ft²pricier than$26510% of homes4% of homes
Living areabigger than2,315 ft²79% of homes79% of homes
Lot sizebigger than0.23 ac29% of homes38% of homes
Year builtnewer than197162% of homes53% of homes

About 100 Rosemont Ave

How much is 100 Rosemont Ave, Farmingville, NY worth?

The TopHap Estimate for 100 Rosemont Ave, Farmingville, NY is $614,455 as of Jul 14, 2026. The likely range is $586,198 to $642,712. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 100 Rosemont Ave, Farmingville, NY last sell?

100 Rosemont Ave, Farmingville, NY last sold on Dec 1, 2017 for $98,750, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 100 Rosemont Ave, Farmingville, NY?

100 Rosemont Ave, Farmingville, NY has 4 bedrooms, 2 bathrooms, 2,315 square feet of living space and a 0.23-acre lot.

When was 100 Rosemont Ave, Farmingville, NY built?

100 Rosemont Ave, Farmingville, NY was built in 1971, making it 55 years old. It is a cape cod home. The building has 2 stories.

What schools serve 100 Rosemont Ave, Farmingville, NY?

100 Rosemont Ave, Farmingville, NY is assigned to Sachem High School East (high), rated B+; Lynwood Avenue Elementary School (elementary), rated C-; Sagamore Middle School (middle), rated B. All sit in Sachem Central School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 100 Rosemont Ave, Farmingville, NY compare to other homes in Farmingville 11738?

Among the 4,630 homes in Farmingville 11738, it is worth more than 46% of them ($614,455 against a typical $622,257), its price per square foot is higher than 10% of them ($265 against a typical $351), it is bigger than 79% of them (2,315 ft² against a typical 1,800 ft²), its lot is bigger than 29% of them (0.23 ac against a typical 0.3 ac) and it is newer than 62% of them (1971 against a typical 1970). Measured against all of Suffolk County, it is worth more than 31% 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 100 Rosemont Ave, Farmingville, NY?

The 2024 property tax bill for 100 Rosemont Ave, Farmingville, NY was $9,588. The county assessed it at $2,520.

Closest homes

More homes in Farmingville 11738

Assigned schools

Explore the area

See this home in context

Open 100 Rosemont 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