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Single Family ResidenceResidential
$586,687$335 / 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 94How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026

5 WILLIAM ST

FARMINGVILLE, NY 11738
3
Beds
1
Baths
1,750 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.
0.24 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.
1
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.

Valuation

$587K
$550K low$623K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,516 (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.$2,955 (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.$2,705
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$615,625

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.Ranch
CountySUFFOLK
Lot (acres)The size of the land the home sits on, from county records.0.24
HeatingThe type of heating system in the home.Radiant
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.Waterfront

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

E
Waverly Elementary SchoolB-
Elementary · Grades KG–5 · 0.4 mi
M
Sagamore Middle SchoolA+
Middle · Grades 6–8 · 0.9 mi
H
Sachem High School EastB
High · Grades 9–12 · 1.8 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%

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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

5 William St 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 75% of homes in Suffolk County
  • Costs less per square foot than 78% of homes in Suffolk County
  • 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
$366K$973K

This home is worth more than 34% 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$586,687
CheaperTypical $623,053Pricier

Pricier than 34% of homes nearby

Price per ft²$335
CheaperTypical $355Pricier

Pricier than 41% of homes nearby

Living area1,750 ft²
SmallerTypical 1,800 ft²Bigger

Bigger than 46% of homes nearby

Lot size0.24 ac
SmallerTypical 0.31 acBigger

Bigger than 28% of homes nearby

Year built1971
OlderTypical 1970Newer

Newer than 61% of homes nearby

How 5 William St ranks against every home in each area.
MeasureThis homeFarmingville 11738Suffolk County
Estimated valuepricier than$586,68734% of homes25% of homes
Price per ft²pricier than$33541% of homes22% of homes
Living areabigger than1,750 ft²46% of homes53% of homes
Lot sizebigger than0.24 ac28% of homes38% of homes
Year builtnewer than197161% of homes53% of homes

About 5 William St

How much is 5 William St, Farmingville, NY worth?

The TopHap Estimate for 5 William St, Farmingville, NY is $586,687 as of Sep 24, 2026. The likely range is $550,319 to $623,055. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 5 William St, Farmingville, NY last sell?

5 William St, Farmingville, NY last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 5 William St, Farmingville, NY?

5 William St, Farmingville, NY has 3 bedrooms, 1 bathrooms, 1,750 square feet of living space and a 0.24-acre lot.

When was 5 William St, Farmingville, NY built?

5 William St, Farmingville, NY was built in 1971, making it 55 years old. It is a ranch home. The building has 1 story.

What schools serve 5 William St, Farmingville, NY?

5 William St, Farmingville, NY is assigned to Waverly Elementary School (elementary), rated B-; Sagamore Middle School (middle), rated A+; Sachem High School East (high), rated B. All sit in Sachem Central School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 5 William St, Farmingville, NY compare to other homes in Farmingville 11738?

Among the 4,644 homes in Farmingville 11738, it is worth more than 34% of them ($586,687 against a typical $623,053), its price per square foot is higher than 41% of them ($335 against a typical $355), it is bigger than 46% of them (1,750 ft² against a typical 1,800 ft²), its lot is bigger than 28% of them (0.24 ac against a typical 0.31 ac) and it is newer than 61% of them (1971 against a typical 1970). Measured against all of Suffolk County, it is worth more than 25% 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 5 William St, Farmingville, NY?

The 2024 property tax bill for 5 William St, Farmingville, NY was $10,516. The county assessed it at $2,955.

More homes on William St

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