Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$198,341$230 / 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 87How 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

509 GRAY ST

GREEN BAY, WI 54303
3
Beds
1
Baths
864 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.
0.15 ac
Lot SizeThe size of the land the home sits on, from county records.
1940
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

$198K
$173K low$224K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,405 (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.$128,200 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$18,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$109,700
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$128,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$174,900

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.11 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyBrown
Lot (acres)The size of the land the home sits on, from county records.0.15
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.None
CoolingThe type of cooling or air conditioning in the home.None
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Shed · 80 ft²

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

E
Elmore Elementary SchoolB-
Elementary · Grades PK–5 · 0.1 mi
H
West High SchoolC+
High · Grades 9–12 · 0.5 mi
M
Franklin Middle SchoolD-
Middle · Grades 6–8 · 0.9 mi

District: Green Bay Area School District

Neighborhood · ZIP 54303These 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.138
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.76
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.14

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.14%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.16%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.27,602
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,445 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$51,009
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$61,109
Average tempThe average temperature here across a full year.44°F
Annual precipHow much rain and melted snow falls here in a typical year.30 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.54%

Owner Tools

Do you own this home?
Claim this home

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

509 Gray 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 Brown County
  • Costs less per square foot than 67% of homes in Mather Heights
  • Smaller than 84% of homes in Brown County
  • Has a smaller lot than 91% of homes in Brown County
  • Older than 88% of homes in Mather Heights

What homes are worth in Green Bay 54303

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

This home
$140K$435K

This home is worth more than 19% of homes in Green Bay 54303.

How it measures up in Green Bay 54303

The dot is this home. The mark in the middle is the typical home in Green Bay 54303.

Estimated value$198,341
CheaperTypical $243,905Pricier

Pricier than 19% of homes nearby

Price per ft²$230
CheaperTypical $244Pricier

Pricier than 37% of homes nearby

Living area864 ft²
SmallerTypical 978 ft²Bigger

Bigger than 32% of homes nearby

Lot size0.15 ac
SmallerTypical 0.19 acBigger

Bigger than 31% of homes nearby

Year built1940
OlderTypical 1948Newer

Newer than 43% of homes nearby

How 509 Gray St ranks against every home in each area.
MeasureThis homeMather HeightsGreen Bay 54303Brown County
Estimated valuepricier than$198,3418% of homes19% of homes6% of homes
Price per ft²pricier than$23033% of homes37% of homes38% of homes
Living areabigger than864 ft²32% of homes32% of homes16% of homes
Lot sizebigger than0.15 ac25% of homes31% of homes9% of homes
Year builtnewer than194012% of homes43% of homes21% of homes

About 509 Gray St

How much is 509 Gray St, Green Bay, WI worth?

The TopHap Estimate for 509 Gray St, Green Bay, WI is $198,341 as of Sep 24, 2026. The likely range is $172,864 to $223,818. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 509 Gray St, Green Bay, WI?

509 Gray St, Green Bay, WI has 3 bedrooms, 1 bathrooms, 864 square feet of living space and a 0.15-acre lot.

When was 509 Gray St, Green Bay, WI built?

509 Gray St, Green Bay, WI was built in 1940, making it 86 years old. The building has 1 story.

What schools serve 509 Gray St, Green Bay, WI?

509 Gray St, Green Bay, WI is assigned to Elmore Elementary School (elementary), rated B-; West High School (high), rated C+; Franklin Middle School (middle), rated D-. All sit in Green Bay Area School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 509 Gray St, Green Bay, WI compare to other homes in Green Bay 54303?

Among the 7,728 homes in Green Bay 54303, it is worth more than 19% of them ($198,341 against a typical $243,905), its price per square foot is higher than 37% of them ($230 against a typical $244), it is bigger than 32% of them (864 ft² against a typical 978 ft²), its lot is bigger than 31% of them (0.15 ac against a typical 0.19 ac) and it is newer than 43% of them (1940 against a typical 1948). Measured against all of Brown 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 509 Gray St, Green Bay, WI?

The 2025 property tax bill for 509 Gray St, Green Bay, WI was $2,405. The county assessed it at $128,200.

More homes on Gray St

Closest homes

More homes in Green Bay 54303

Assigned schools

Explore the area

See this home in context

Open 509 Gray St 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