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Single Family ResidenceResidential
$676,444$429 / 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 91How 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

18 MAGNET ST

STONY BROOK, NY 11790
3
Beds
2
Baths
1,578 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.
0.52 ac
Lot SizeThe size of the land the home sits on, from county records.
1980
Year BuiltThe year the home was originally built, according to county records.
1
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

$676K
$614K low$739K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$12,355 (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.$3,150 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$375
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$2,775
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$656,250

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.0.52
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
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

Transaction History(1)

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
William Sidney Mount Elementary SchoolB-
Elementary · Grades PK–5 · 0.8 mi
M
R.C Murphy Middle SchoolB
Middle · Grades 6–8 · 1.3 mi
H
Ward Melville High SchoolA+
High · Grades 9–12 · 3.9 mi

District: Three Village Central School District

Neighborhood · ZIP 11790These 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.48
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.109
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.68

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.26%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.3%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.8%
PopulationHow many people live in this area.25,260
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,234 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$149,478
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$177,584
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%

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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

18 Magnet 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 Stony Brook 11790
  • Costs more per square foot than 68% of homes in Stony Brook 11790
  • Smaller than 74% of homes in Stony Brook 11790
  • Has a bigger lot than 78% of homes in Suffolk County
  • Newer than 87% of homes in Stony Brook 11790

What homes are worth in Stony Brook 11790

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

This home
$443K$1.4M

This home is worth more than 25% of homes in Stony Brook 11790.

How it measures up in Stony Brook 11790

The dot is this home. The mark in the middle is the typical home in Stony Brook 11790.

Estimated value$676,444
CheaperTypical $759,197Pricier

Pricier than 25% of homes nearby

Price per ft²$429
CheaperTypical $396Pricier

Pricier than 68% of homes nearby

Living area1,578 ft²
SmallerTypical 1,908 ft²Bigger

Bigger than 26% of homes nearby

Lot size0.52 ac
SmallerTypical 0.37 acBigger

Bigger than 77% of homes nearby

Year built1980
OlderTypical 1966Newer

Newer than 87% of homes nearby

How 18 Magnet St ranks against every home in each area.
MeasureThis homeStony Brook 11790Suffolk County
Estimated valuepricier than$676,44425% of homes47% of homes
Price per ft²pricier than$42968% of homes56% of homes
Living areabigger than1,578 ft²26% of homes45% of homes
Lot sizebigger than0.52 ac77% of homes78% of homes
Year builtnewer than198087% of homes66% of homes

About 18 Magnet St

How much is 18 Magnet St, Stony Brook, NY worth?

The TopHap Estimate for 18 Magnet St, Stony Brook, NY is $676,444 as of Aug 30, 2026. The likely range is $613,784 to $739,104. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18 Magnet St, Stony Brook, NY last sell?

18 Magnet St, Stony Brook, NY last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 18 Magnet St, Stony Brook, NY?

18 Magnet St, Stony Brook, NY has 3 bedrooms, 2 bathrooms, 1,578 square feet of living space and a 0.52-acre lot.

When was 18 Magnet St, Stony Brook, NY built?

18 Magnet St, Stony Brook, NY was built in 1980, making it 46 years old. It is a ranch home. The building has 1 story.

What schools serve 18 Magnet St, Stony Brook, NY?

18 Magnet St, Stony Brook, NY is assigned to William Sidney Mount Elementary School (elementary), rated B-; R.C Murphy Middle School (middle), rated B; Ward Melville High School (high), rated A+. All sit in Three Village Central School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 18 Magnet St, Stony Brook, NY compare to other homes in Stony Brook 11790?

Among the 4,997 homes in Stony Brook 11790, it is worth more than 25% of them ($676,444 against a typical $759,197), its price per square foot is higher than 68% of them ($429 against a typical $396), it is bigger than 26% of them (1,578 ft² against a typical 1,908 ft²), its lot is bigger than 77% of them (0.52 ac against a typical 0.37 ac) and it is newer than 87% of them (1980 against a typical 1966). Measured against all of Suffolk County, it is worth more than 47% 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 18 Magnet St, Stony Brook, NY?

The 2024 property tax bill for 18 Magnet St, Stony Brook, NY was $12,355. The county assessed it at $3,150.

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