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Single Family ResidenceResidential
$307,972$243 / 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 97How 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

4130 GREENBRIAR DR

JANESVILLE, WI 53546
4
Beds
3
Baths
1,267 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.
0.27 ac
Lot SizeThe size of the land the home sits on, from county records.
2002
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
5
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$308K
$297K low$319K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,901 (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.$246,600 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$29,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$217,100
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$246,600

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
Lot (acres)The size of the land the home sits on, from county records.0.27
HeatingThe type of heating system in the home.Yes
CoolingThe type of cooling or air conditioning in the home.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 · 168 ft²Patio · 168 ft²Porch · 24 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.

E
Harmony Elementary SchoolA+
Elementary · Grades PK–3 · 0.2 mi
H
Milton High SchoolC+
High · Grades 9–12 · 3.3 mi
M
Milton Middle SchoolB+
Middle · Grades 7–8 · 3.8 mi

District: Milton School District

Neighborhood · ZIP 53546These 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.102
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.88
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.32

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.18%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.9%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.31,634
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.403 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$73,028
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$85,718
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

4130 Greenbriar 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.

  • Costs more per square foot than 82% of homes in Rock County
  • Newer than 89% of homes in Rock County

What homes are worth in Janesville 53546

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

This home
$152K$568K

This home is worth more than 50% of homes in Janesville 53546.

How it measures up in Janesville 53546

The dot is this home. The mark in the middle is the typical home in Janesville 53546.

Estimated value$307,972
CheaperTypical $307,790Pricier

Pricier than 50% of homes nearby

Price per ft²$243
CheaperTypical $219Pricier

Pricier than 72% of homes nearby

Living area1,267 ft²
SmallerTypical 1,368 ft²Bigger

Bigger than 41% of homes nearby

Lot size0.27 ac
SmallerTypical 0.25 acBigger

Bigger than 60% of homes nearby

Year built2002
OlderTypical 1986Newer

Newer than 83% of homes nearby

How 4130 Greenbriar Dr ranks against every home in each area.
MeasureThis homeJanesville 53546Rock County
Estimated valuepricier than$307,97250% of homes58% of homes
Price per ft²pricier than$24372% of homes82% of homes
Living areabigger than1,267 ft²41% of homes41% of homes
Lot sizebigger than0.27 ac60% of homes53% of homes
Year builtnewer than200283% of homes89% of homes

About 4130 Greenbriar Dr

How much is 4130 Greenbriar Dr, Janesville, WI worth?

The TopHap Estimate for 4130 Greenbriar Dr, Janesville, WI is $307,972 as of Sep 24, 2026. The likely range is $297,357 to $318,587. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 4130 Greenbriar Dr, Janesville, WI?

4130 Greenbriar Dr, Janesville, WI has 4 bedrooms, 3 bathrooms, 1,267 square feet of living space and a 0.27-acre lot.

When was 4130 Greenbriar Dr, Janesville, WI built?

4130 Greenbriar Dr, Janesville, WI was built in 2002, making it 24 years old. It is a ranch home. The building has 1 story.

What schools serve 4130 Greenbriar Dr, Janesville, WI?

4130 Greenbriar Dr, Janesville, WI is assigned to Harmony Elementary School (elementary), rated A+; Milton High School (high), rated C+; Milton Middle School (middle), rated B+. All sit in Milton School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4130 Greenbriar Dr, Janesville, WI compare to other homes in Janesville 53546?

Among the 10,824 homes in Janesville 53546, it is worth more than 50% of them ($307,972 against a typical $307,790), its price per square foot is higher than 72% of them ($243 against a typical $219), it is bigger than 41% of them (1,267 ft² against a typical 1,368 ft²), its lot is bigger than 60% of them (0.27 ac against a typical 0.25 ac) and it is newer than 83% of them (2002 against a typical 1986). Measured against all of Rock County, it is worth more than 58% 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 4130 Greenbriar Dr, Janesville, WI?

The 2025 property tax bill for 4130 Greenbriar Dr, Janesville, WI was $3,901. The county assessed it at $246,600.

More homes on Greenbriar Dr

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Assigned schools

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