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Single Family ResidenceResidential
$584,865$391 / 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 Oct 21, 2026
Last sold for $369,000 on Aug 9, 2007

603 DARTMOUTH ST

WESTBURY, NY 11590
1
Baths
1,494 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.
0.11 ac
Lot SizeThe size of the land the home sits on, from county records.
1946
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
5
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$585K
$543K low$627K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$369,000 · Aug 9, 2007

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,001 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$348 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$190
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$158
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$348
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$348,000

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
CountyNASSAU
Lot (acres)The size of the land the home sits on, from county records.0.12
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
PoolWhether the property has a pool, and what kind, such as in-ground.No

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
Powells Lane SchoolC-
Elementary · Grades 1–5 · 0.4 mi
M
Westbury Middle SchoolC-
Middle · Grades 6–8 · 0.5 mi
H
Westbury High SchoolC-
High · Grades 9–12 · 0.8 mi

District: Westbury Union Free School District

Neighborhood · ZIP 11590These 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.74
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.112
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.94

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.5.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.1%
PopulationHow many people live in this area.45,523
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.6,819 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$129,386
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$161,814
Average tempThe average temperature here across a full year.53°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.56%

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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

603 Dartmouth 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 94% of homes in Nassau County
  • Costs less per square foot than 90% of homes in Nassau County
  • Smaller than 65% of homes in Nassau County
  • Has a smaller lot than 93% of homes in Westbury 11590
  • Older than 89% of homes in Westbury 11590

What homes are worth in Westbury 11590

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

This home
$446K$1.4M

This home is worth more than 9% of homes in Westbury 11590.

How it measures up in Westbury 11590

The dot is this home. The mark in the middle is the typical home in Westbury 11590.

Estimated value$584,865
CheaperTypical $773,973Pricier

Pricier than 9% of homes nearby

Price per ft²$391
CheaperTypical $482Pricier

Pricier than 16% of homes nearby

Living area1,494 ft²
SmallerTypical 1,683 ft²Bigger

Bigger than 37% of homes nearby

Lot size0.11 ac
SmallerTypical 0.16 acBigger

Bigger than 7% of homes nearby

Year built1946
OlderTypical 1954Newer

Newer than 11% of homes nearby

How 603 Dartmouth St ranks against every home in each area.
MeasureThis homeWestbury 11590Nassau County
Estimated valuepricier than$584,8659% of homes6% of homes
Price per ft²pricier than$39116% of homes10% of homes
Living areabigger than1,494 ft²37% of homes35% of homes
Lot sizebigger than0.11 ac7% of homes16% of homes
Year builtnewer than194611% of homes27% of homes

About 603 Dartmouth St

How much is 603 Dartmouth St, Westbury, NY worth?

The TopHap Estimate for 603 Dartmouth St, Westbury, NY is $584,865 as of Oct 21, 2026. The likely range is $542,580 to $627,150. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 603 Dartmouth St, Westbury, NY last sell?

603 Dartmouth St, Westbury, NY last sold on Aug 9, 2007 for $369,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 603 Dartmouth St, Westbury, NY?

603 Dartmouth St, Westbury, NY has 1 bathrooms, 1,494 square feet of living space and a 0.12-acre lot.

When was 603 Dartmouth St, Westbury, NY built?

603 Dartmouth St, Westbury, NY was built in 1946, making it 80 years old. It is a cape cod home. The building has 1 story.

What schools serve 603 Dartmouth St, Westbury, NY?

603 Dartmouth St, Westbury, NY is assigned to Powells Lane School (elementary), rated C-; Westbury Middle School (middle), rated C-; Westbury High School (high), rated C-. All sit in Westbury Union Free School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 603 Dartmouth St, Westbury, NY compare to other homes in Westbury 11590?

Among the 12,249 homes in Westbury 11590, it is worth more than 9% of them ($584,865 against a typical $773,973), its price per square foot is higher than 16% of them ($391 against a typical $482), it is bigger than 37% of them (1,494 ft² against a typical 1,683 ft²), its lot is bigger than 7% of them (0.11 ac against a typical 0.16 ac) and it is newer than 11% of them (1946 against a typical 1954). Measured against all of Nassau County, it is worth more than 6% 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 603 Dartmouth St, Westbury, NY?

The 2025 property tax bill for 603 Dartmouth St, Westbury, NY was $9,001. The county assessed it at $348.

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