Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$307,355
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 88How 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
Last sold for $213,400 on Sep 25, 2025

645 KARL ST

GREEN BAY, WI 54301
0
Baths
0.17 ac
Lot SizeThe size of the land the home sits on, from county records.

Valuation

$307K
$271K low$343K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$213,400 · Sep 25, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,931 (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.$162,500 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$29,100
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$133,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$232,000

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.18 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.0.17
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
Webster Elementary Children's Center for Integrated ArtsC+
Elementary · Grades PK–5 · 0.6 mi
M
Washington Middle SchoolF
Middle · Grades 6–8 · 1.8 mi
H
East High SchoolD-
High · Grades 9–12 · 2.1 mi

District: Green Bay Area School District

Neighborhood · ZIP 54301These 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.106
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.70
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.11

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.22%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.9.1%
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.24,608
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,307 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$68,188
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$88,248
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

645 Karl 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.

  • Has a smaller lot than 86% of homes in Brown County

What homes are worth in Green Bay 54301

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

This home
$156K$689K

This home is worth more than 57% of homes in Green Bay 54301.

How it measures up in Green Bay 54301

The dot is this home. The mark in the middle is the typical home in Green Bay 54301.

Estimated value$307,355
CheaperTypical $291,390Pricier

Pricier than 57% of homes nearby

Lot size0.17 ac
SmallerTypical 0.23 acBigger

Bigger than 25% of homes nearby

How 645 Karl St ranks against every home in each area.
MeasureThis homeGreen Bay 54301Brown County
Estimated valuepricier than$307,35557% of homes38% of homes
Lot sizebigger than0.17 ac25% of homes14% of homes

About 645 Karl St

How much is 645 Karl St, Green Bay, WI worth?

The TopHap Estimate for 645 Karl St, Green Bay, WI is $307,355 as of Sep 24, 2026. The likely range is $271,367 to $343,343. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 645 Karl St, Green Bay, WI last sell?

645 Karl St, Green Bay, WI last sold on Sep 25, 2025 for $213,400, according to the county's recorded deed.

What schools serve 645 Karl St, Green Bay, WI?

645 Karl St, Green Bay, WI is assigned to Webster Elementary Children's Center for Integrated Arts (elementary), rated C+; Washington Middle School (middle), rated F; East High School (high), rated D-. All sit in Green Bay Area School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 645 Karl St, Green Bay, WI compare to other homes in Green Bay 54301?

Among the 8,296 homes in Green Bay 54301, it is worth more than 57% of them ($307,355 against a typical $291,390) and its lot is bigger than 25% of them (0.17 ac against a typical 0.23 ac). Measured against all of Brown County, it is worth more than 38% 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 645 Karl St, Green Bay, WI?

The 2025 property tax bill for 645 Karl St, Green Bay, WI was $2,931. The county assessed it at $162,500.

More homes on Karl St

Closest homes

More homes in Green Bay 54301

Assigned schools

Explore the area

See this home in context

Open 645 Karl 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