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CondominiumResidential
$449,927$297 / 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 92How 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

3621 NEWCASTLE DR

JANESVILLE, WI 53546
3
Beds
3
Baths
1,516 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.
0.22 ac
Lot SizeThe size of the land the home sits on, from county records.
2022
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
7
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

$450K
$412K low$487K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,232 (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.$385,600 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$35,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$350,600
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$409,951

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.29
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
13
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
66
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
62
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
3
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
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.Condominium
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.0.22
HeatingThe type of heating system in the home.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 120 ft²

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 · 0.6 mi
H
Milton High SchoolB
High · Grades 9–12 · 3.3 mi
M
Milton Middle SchoolC
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

3621 Newcastle 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 91% of homes in Janesville 53546
  • Costs more per square foot than 97% of homes in Janesville 53546
  • Has a smaller lot than 71% of homes in Janesville 53546
  • Among the newest homes in Janesville 53546

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
$151K$561K

This home is worth more than 91% 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$449,927
CheaperTypical $307,790Pricier

Pricier than 91% of homes nearby

Price per ft²$297
CheaperTypical $219Pricier

Pricier than 97% of homes nearby

Living area1,516 ft²
SmallerTypical 1,369 ft²Bigger

Bigger than 62% of homes nearby

Lot size0.22 ac
SmallerTypical 0.25 acBigger

Bigger than 29% of homes nearby

Year built2022
OlderTypical 1986Newer

Newer than almost all homes nearby

How 3621 Newcastle Dr ranks against every home in each area.
MeasureThis homeJanesville 53546Rock County
Estimated valuepricier than$449,92791% of homes86% of homes
Price per ft²pricier than$29797% of homes97% of homes
Living areabigger than1,516 ft²62% of homes61% of homes
Lot sizebigger than0.22 ac29% of homes35% of homes
Year builtnewer than2022almost all homesalmost all homes

About 3621 Newcastle Dr

How much is 3621 Newcastle Dr, Janesville, WI worth?

The TopHap Estimate for 3621 Newcastle Dr, Janesville, WI is $449,927 as of Sep 24, 2026. The likely range is $412,396 to $487,458. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 3621 Newcastle Dr, Janesville, WI last sell?

3621 Newcastle Dr, Janesville, WI last sold on Oct 6, 2022, according to the county's recorded deed.

How big is 3621 Newcastle Dr, Janesville, WI?

3621 Newcastle Dr, Janesville, WI has 3 bedrooms, 3 bathrooms, 1,516 square feet of living space and a 0.22-acre lot.

When was 3621 Newcastle Dr, Janesville, WI built?

3621 Newcastle Dr, Janesville, WI was built in 2022, making it 4 years old. It is a ranch home. The building has 1 story.

What schools serve 3621 Newcastle Dr, Janesville, WI?

3621 Newcastle Dr, Janesville, WI is assigned to Harmony Elementary School (elementary), rated A; Milton High School (high), rated B; Milton Middle School (middle), rated C. All sit in Milton School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 3621 Newcastle Dr, Janesville, WI compare to other homes in Janesville 53546?

Among the 10,824 homes in Janesville 53546, it is worth more than 91% of them ($449,927 against a typical $307,790), its price per square foot is higher than 97% of them ($297 against a typical $219), it is bigger than 62% of them (1,516 ft² against a typical 1,369 ft²), its lot is bigger than 29% of them (0.22 ac against a typical 0.25 ac) and it is newer than almost all of them (2022 against a typical 1986). 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 3621 Newcastle Dr, Janesville, WI?

The 2025 property tax bill for 3621 Newcastle Dr, Janesville, WI was $6,232. The county assessed it at $385,600.

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