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Single Family ResidenceResidential
$640,337$225 / 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 Jul 14, 2026

91 ROSEMONT AVE

FARMINGVILLE, NY 11738
4
Beds
2
Baths
2,844 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.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$640K
$597K low$683K high
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.$515,337
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$412,270
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.19%
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.$125,000
HSBC MORTGAGE CORP (USA) · R · recorded Dec 18, 2001

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,461 (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.$2,485 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$240
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$2,245
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$517,708

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.Colonial
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

Foreclosure Filings(2)

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 · 0.6 mi
M
Sagamore Middle SchoolB
Middle · Grades 6–8 · 2.0 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

91 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.

  • Among the lowest price per square foot in Suffolk County
  • Bigger than 94% of homes in Farmingville 11738
  • Has a smaller lot than 72% 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
$396K$935K

This home is worth more than 58% 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$640,337
CheaperTypical $622,362Pricier

Pricier than 58% of homes nearby

Price per ft²$225
CheaperTypical $350Pricier

Pricier than 2% of homes nearby

Living area2,844 ft²
SmallerTypical 1,800 ft²Bigger

Bigger than 94% of homes nearby

Lot size0.23 ac
SmallerTypical 0.31 acBigger

Bigger than 28% of homes nearby

Year built1971
OlderTypical 1970Newer

Newer than 62% of homes nearby

How 91 Rosemont Ave ranks against every home in each area.
MeasureThis homeFarmingville 11738Suffolk County
Estimated valuepricier than$640,33758% of homes37% of homes
Price per ft²pricier than$2252% of homesalmost no homes
Living areabigger than2,844 ft²94% of homes90% of homes
Lot sizebigger than0.23 ac28% of homes38% of homes
Year builtnewer than197162% of homes52% of homes

About 91 Rosemont Ave

How much is 91 Rosemont Ave, Farmingville, NY worth?

The TopHap Estimate for 91 Rosemont Ave, Farmingville, NY is $640,337 as of Jul 14, 2026. The likely range is $597,350 to $683,324. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 91 Rosemont Ave, Farmingville, NY last sell?

91 Rosemont Ave, Farmingville, NY last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 91 Rosemont Ave, Farmingville, NY?

91 Rosemont Ave, Farmingville, NY has 4 bedrooms, 2 bathrooms, 2,844 square feet of living space and a 0.23-acre lot.

When was 91 Rosemont Ave, Farmingville, NY built?

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

What schools serve 91 Rosemont Ave, Farmingville, NY?

91 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 91 Rosemont Ave, Farmingville, NY compare to other homes in Farmingville 11738?

Among the 4,630 homes in Farmingville 11738, it is worth more than 58% of them ($640,337 against a typical $622,362), its price per square foot is higher than 2% of them ($225 against a typical $350), it is bigger than 94% of them (2,844 ft² against a typical 1,800 ft²), its lot is bigger than 28% of them (0.23 ac against a typical 0.31 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 37% 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 91 Rosemont Ave, Farmingville, NY?

The 2024 property tax bill for 91 Rosemont Ave, Farmingville, NY was $9,461. The county assessed it at $2,485.

More homes on Rosemont Ave

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More homes in Farmingville 11738

Assigned schools

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