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Single Family ResidenceResidential
$454,528$269 / 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 $264,000 on Jul 3, 2019

255 KNOLLVIEW DR

JANESVILLE, WI 53548
3
Beds
3
Baths
1,692 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.
0.44 ac
Lot SizeThe size of the land the home sits on, from county records.
1995
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.
3
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$455K
$429K low$480K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$264,000 · Jul 3, 2019

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,392 (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.$368,200 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$40,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$327,900
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$368,200

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.Ranch
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.1996
Lot (acres)The size of the land the home sits on, from county records.0.43
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
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck · 876 ft²Patio · 876 ft²Porch · 45 ft²

Transaction History(1)

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.

H
Parker High SchoolD+
High · Grades 9–12 · 0.3 mi
M
Franklin Middle SchoolC-
Middle · Grades 6–8 · 1.0 mi
E
Madison Elementary SchoolC
Elementary · Grades KG–5 · 1.1 mi

District: Janesville School District

Neighborhood · ZIP 53548These 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.92
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.92
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.17%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.11%
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.20,818
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.284 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$74,018
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$85,665
Average tempThe average temperature here across a full year.47°F
Annual precipHow much rain and melted snow falls here in a typical year.35 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

255 Knollview Dr 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 86% of homes in Rock County
  • Costs more per square foot than 91% of homes in Rock County
  • Bigger than 71% of homes in Rock County
  • Has a bigger lot than 74% of homes in Janesville 53548
  • Newer than 82% of homes in Rock County

What homes are worth in Janesville 53548

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

This home
$105K$759K

This home is worth more than 85% of homes in Janesville 53548.

How it measures up in Janesville 53548

The dot is this home. The mark in the middle is the typical home in Janesville 53548.

Estimated value$454,528
CheaperTypical $280,415Pricier

Pricier than 85% of homes nearby

Price per ft²$269
CheaperTypical $193Pricier

Pricier than 89% of homes nearby

Living area1,692 ft²
SmallerTypical 1,454 ft²Bigger

Bigger than 66% of homes nearby

Lot size0.44 ac
SmallerTypical 0.25 acBigger

Bigger than 74% of homes nearby

Year built1995
OlderTypical 1963Newer

Newer than 81% of homes nearby

How 255 Knollview Dr ranks against every home in each area.
MeasureThis homeJanesville 53548Rock County
Estimated valuepricier than$454,52885% of homes86% of homes
Price per ft²pricier than$26989% of homes91% of homes
Living areabigger than1,692 ft²66% of homes71% of homes
Lot sizebigger than0.44 ac74% of homes73% of homes
Year builtnewer than199581% of homes82% of homes

About 255 Knollview Dr

How much is 255 Knollview Dr, Janesville, WI worth?

The TopHap Estimate for 255 Knollview Dr, Janesville, WI is $454,528 as of Sep 24, 2026. The likely range is $429,237 to $479,819. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 255 Knollview Dr, Janesville, WI last sell?

255 Knollview Dr, Janesville, WI last sold on Jul 3, 2019 for $264,000, according to the county's recorded deed.

How big is 255 Knollview Dr, Janesville, WI?

255 Knollview Dr, Janesville, WI has 3 bedrooms, 3 bathrooms, 1,692 square feet of living space and a 0.43-acre lot.

When was 255 Knollview Dr, Janesville, WI built?

255 Knollview Dr, Janesville, WI was built in 1995, making it 31 years old. It is a ranch home. The building has 1 story.

What schools serve 255 Knollview Dr, Janesville, WI?

255 Knollview Dr, Janesville, WI is assigned to Parker High School (high), rated D+; Franklin Middle School (middle), rated C-; Madison Elementary School (elementary), rated C. All sit in Janesville School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 255 Knollview Dr, Janesville, WI compare to other homes in Janesville 53548?

Among the 6,715 homes in Janesville 53548, it is worth more than 85% of them ($454,528 against a typical $280,415), its price per square foot is higher than 89% of them ($269 against a typical $193), it is bigger than 66% of them (1,692 ft² against a typical 1,454 ft²), its lot is bigger than 74% of them (0.44 ac against a typical 0.25 ac) and it is newer than 81% of them (1995 against a typical 1963). Measured against all of Rock County, it is worth more than 86% 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 255 Knollview Dr, Janesville, WI?

The 2025 property tax bill for 255 Knollview Dr, Janesville, WI was $6,392. The county assessed it at $368,200.

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