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Single Family ResidenceResidential
$325,244$96 / 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 94How 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 $93,600 on Oct 20, 2021

21 MARSHALL PL

JANESVILLE, WI 53545
4
Beds
4
Baths
3,394 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.
0.19 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.
2
StoriesHow many floors the home has above ground.
9
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$325K
$305K low$345K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$93,600 · Oct 20, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,568 (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.$322,700 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$24,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$298,500
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$322,700

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
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1942
Lot (acres)The size of the land the home sits on, from county records.0.19
HeatingThe type of heating system in the home.Yes
CoolingThe type of cooling or air conditioning in the home.Yes
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached

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 SchoolC
High · Grades 9–12 · 0.7 mi
M
Edison Middle SchoolC
Middle · Grades 6–8 · 2.5 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

21 Marshall Pl 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 more than 72% of homes in Janesville 53545
  • Among the lowest price per square foot in Janesville 53545
  • Bigger than 98% of homes in Rock County
  • Has a smaller lot than 77% of homes in Rock County
  • Older than 71% 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
$151K$696K

This home is worth more than 72% 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$325,244
CheaperTypical $281,075Pricier

Pricier than 72% of homes nearby

Price per ft²$96
CheaperTypical $202Pricier

Cheaper than almost all homes nearby

Living area3,394 ft²
SmallerTypical 1,435 ft²Bigger

Bigger than 97% of homes nearby

Lot size0.19 ac
SmallerTypical 0.23 acBigger

Bigger than 24% of homes nearby

Year built1940
OlderTypical 1958Newer

Newer than 32% of homes nearby

How 21 Marshall Pl ranks against every home in each area.
MeasureThis homeJanesville 53545Rock County
Estimated valuepricier than$325,24472% of homes63% of homes
Price per ft²pricier than$96almost no homes4% of homes
Living areabigger than3,394 ft²97% of homes98% of homes
Lot sizebigger than0.19 ac24% of homes23% of homes
Year builtnewer than194032% of homes29% of homes

About 21 Marshall Pl

How much is 21 Marshall Pl, Janesville, WI worth?

The TopHap Estimate for 21 Marshall Pl, Janesville, WI is $325,244 as of Sep 24, 2026. The likely range is $305,296 to $345,192. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Marshall Pl, Janesville, WI last sell?

21 Marshall Pl, Janesville, WI last sold on Oct 20, 2021 for $93,600, according to the county's recorded deed.

How big is 21 Marshall Pl, Janesville, WI?

21 Marshall Pl, Janesville, WI has 4 bedrooms, 4 bathrooms, 3,394 square feet of living space and a 0.19-acre lot.

When was 21 Marshall Pl, Janesville, WI built?

21 Marshall Pl, Janesville, WI was built in 1940, making it 86 years old. It is a colonial home. The building has 2 stories.

What schools serve 21 Marshall Pl, Janesville, WI?

21 Marshall Pl, Janesville, WI is assigned to Roosevelt Elementary School (elementary), rated A; Craig High School (high), rated C; 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 21 Marshall Pl, Janesville, WI compare to other homes in Janesville 53545?

Among the 7,842 homes in Janesville 53545, it is worth more than 72% of them ($325,244 against a typical $281,075), its price per square foot is higher than almost none of them ($96 against a typical $202), it is bigger than 97% of them (3,394 ft² against a typical 1,435 ft²), its lot is bigger than 24% of them (0.19 ac against a typical 0.23 ac) and it is newer than 32% of them (1940 against a typical 1958). Measured against all of Rock County, it is worth more than 63% 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 21 Marshall Pl, Janesville, WI?

The 2025 property tax bill for 21 Marshall Pl, Janesville, WI was $5,568. The county assessed it at $322,700.

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