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Single Family ResidenceResidential
$303,134$178 / 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 Oct 21, 2026

37 S BLACKHAWK ST

JANESVILLE, WI 53545
3
Beds
1
Baths
1,700 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.
0.18 ac
Lot SizeThe size of the land the home sits on, from county records.
1935
Year BuiltThe year the home was originally built, according to county records.
2
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

$303K
$275K low$331K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,838 (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.$227,200 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$22,900
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$204,300
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$227,200

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.Colonial
CountyRock
Lot (acres)The size of the land the home sits on, from county records.0.17
HeatingThe type of heating system in the home.Yes
CoolingThe type of cooling or air conditioning in the home.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Patio · 248 ft²

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
Roosevelt Elementary SchoolA+
Elementary · Grades KG–5 · 0.4 mi
H
Craig High SchoolD+
High · Grades 9–12 · 0.5 mi
M
Edison Middle SchoolC
Middle · Grades 6–8 · 2.8 mi

District: Janesville School District

Neighborhood · ZIP 53545These 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.97
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.87
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.30

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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.21%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.0%
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.22,576
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.928 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$73,159
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$89,377
Average tempThe average temperature here across a full year.47°F
Annual precipHow much rain and melted snow falls here in a typical year.34 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.54%

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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

37 S Blackhawk 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.

  • Costs less per square foot than 69% of homes in Janesville 53545
  • Bigger than 72% of homes in Rock County
  • Has a smaller lot than 81% of homes in Janesville 53545
  • Older than 74% of homes in Rock County

What homes are worth in Janesville 53545

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

This home
$160K$734K

This home is worth more than 63% of homes in Janesville 53545.

How it measures up in Janesville 53545

The dot is this home. The mark in the middle is the typical home in Janesville 53545.

Estimated value$303,134
CheaperTypical $283,493Pricier

Pricier than 63% of homes nearby

Price per ft²$178
CheaperTypical $204Pricier

Pricier than 31% of homes nearby

Living area1,700 ft²
SmallerTypical 1,432 ft²Bigger

Bigger than 68% of homes nearby

Lot size0.18 ac
SmallerTypical 0.23 acBigger

Bigger than 19% of homes nearby

Year built1935
OlderTypical 1958Newer

Newer than 28% of homes nearby

How 37 S Blackhawk St ranks against every home in each area.
MeasureThis homeJanesville 53545Rock County
Estimated valuepricier than$303,13463% of homes56% of homes
Price per ft²pricier than$17831% of homes40% of homes
Living areabigger than1,700 ft²68% of homes72% of homes
Lot sizebigger than0.18 ac19% of homes20% of homes
Year builtnewer than193528% of homes26% of homes

About 37 S Blackhawk St

How much is 37 S Blackhawk St, Janesville, WI worth?

The TopHap Estimate for 37 S Blackhawk St, Janesville, WI is $303,134 as of Oct 21, 2026. The likely range is $275,433 to $330,835. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 37 S Blackhawk St, Janesville, WI last sell?

37 S Blackhawk St, Janesville, WI last sold on Dec 11, 2020, according to the county's recorded deed.

How big is 37 S Blackhawk St, Janesville, WI?

37 S Blackhawk St, Janesville, WI has 3 bedrooms, 1 bathrooms, 1,700 square feet of living space and a 0.17-acre lot.

When was 37 S Blackhawk St, Janesville, WI built?

37 S Blackhawk St, Janesville, WI was built in 1935, making it 91 years old. It is a colonial home. The building has 2 stories.

What schools serve 37 S Blackhawk St, Janesville, WI?

37 S Blackhawk St, Janesville, WI is assigned to Roosevelt Elementary School (elementary), rated A+; Craig High School (high), rated D+; Edison Middle School (middle), rated C. All sit in Janesville School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 37 S Blackhawk St, Janesville, WI compare to other homes in Janesville 53545?

Among the 7,842 homes in Janesville 53545, it is worth more than 63% of them ($303,134 against a typical $283,493), its price per square foot is higher than 31% of them ($178 against a typical $204), it is bigger than 68% of them (1,700 ft² against a typical 1,432 ft²), its lot is bigger than 19% of them (0.18 ac against a typical 0.23 ac) and it is newer than 28% of them (1935 against a typical 1958). Measured against all of Rock County, it is worth more than 56% 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 37 S Blackhawk St, Janesville, WI?

The 2025 property tax bill for 37 S Blackhawk St, Janesville, WI was $3,838. The county assessed it at $227,200.

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