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Single Family ResidenceResidential
$69,455$72 / 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 86How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026

266 S RIVER ST

JANESVILLE, WI 53548
3
Beds
1
Baths
960 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.
0.2 ac
Lot SizeThe size of the land the home sits on, from county records.
1840
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

$69K
$60K low$79K high
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$69,455
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$55,564

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,119 (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.$65,600 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$15,700
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$49,900
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$65,600

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.37 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.11%
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
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.0.20
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

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

E
Wilson Elementary SchoolD
Elementary · Grades KG–5 · 0.4 mi
M
Franklin Middle SchoolC-
Middle · Grades 6–8 · 1.6 mi
H
Parker High SchoolD+
High · Grades 9–12 · 2.2 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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Absentee owner
Company ownedWhether the owner is a company or trust rather than a person.No

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

266 S River 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.

  • Among the least valuable homes in Janesville 53548
  • Among the lowest price per square foot in Rock County
  • Smaller than 88% of homes in Janesville 53548
  • Has a smaller lot than 70% of homes in Rock County
  • Among the oldest homes in Janesville 53548

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
$94K$785K

This home is worth less than almost all 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$69,455
CheaperTypical $282,370Pricier

Cheaper than almost all homes nearby

Price per ft²$72
CheaperTypical $191Pricier

Pricier than 2% of homes nearby

Living area960 ft²
SmallerTypical 1,443 ft²Bigger

Bigger than 12% of homes nearby

Lot size0.2 ac
SmallerTypical 0.24 acBigger

Bigger than 37% of homes nearby

Year built1840
OlderTypical 1963Newer

Older than almost all homes nearby

How 266 S River St ranks against every home in each area.
MeasureThis homeJanesville 53548Rock County
Estimated valuepricier than$69,455almost no homesalmost no homes
Price per ft²pricier than$722% of homesalmost no homes
Living areabigger than960 ft²12% of homes14% of homes
Lot sizebigger than0.2 ac37% of homes30% of homes
Year builtnewer than1840almost no homesalmost no homes

About 266 S River St

How much is 266 S River St, Janesville, WI worth?

The TopHap Estimate for 266 S River St, Janesville, WI is $69,455 as of Jul 14, 2026. The likely range is $60,057 to $78,853. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 266 S River St, Janesville, WI?

266 S River St, Janesville, WI has 3 bedrooms, 1 bathrooms, 960 square feet of living space and a 0.20-acre lot.

When was 266 S River St, Janesville, WI built?

266 S River St, Janesville, WI was built in 1840, making it 186 years old. It is a colonial home. The building has 2 stories.

What schools serve 266 S River St, Janesville, WI?

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

How does 266 S River St, Janesville, WI compare to other homes in Janesville 53548?

Among the 6,715 homes in Janesville 53548, it is worth more than almost none of them ($69,455 against a typical $282,370), its price per square foot is higher than 2% of them ($72 against a typical $191), it is bigger than 12% of them (960 ft² against a typical 1,443 ft²), its lot is bigger than 37% of them (0.2 ac against a typical 0.24 ac) and it is newer than almost none of them (1840 against a typical 1963). Measured against all of Rock County, it is worth more than almost no 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 266 S River St, Janesville, WI?

The 2025 property tax bill for 266 S River St, Janesville, WI was $1,119. The county assessed it at $65,600.

Closest homes

More homes in Janesville 53548

Assigned schools

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