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Single Family ResidenceResidential
$361,004
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

3940 SUNNYVALE DR

DEFOREST, WI 53532
0
Baths
0.48 ac
Lot SizeThe size of the land the home sits on, from county records.

Valuation

$361K
$332K low$390K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,130 (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.$445,400 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$109,100
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$336,300
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$339,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$433,000

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.28
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
22
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
60
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
55
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.

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
CountyDane
Lot (acres)The size of the land the home sits on, from county records.0.48
HeatingThe type of heating system in the home.None
PoolWhether the property has a pool, and what kind, such as in-ground.No

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
Windsor Elementary SchoolB+
Elementary · Grades KG–3 · 1.6 mi
H
DeForest High SchoolA-
High · Grades 9–12 · 2.6 mi
M
DeForest Middle SchoolB
Middle · Grades 7–8 · 2.7 mi

District: Deforest Area School District

Neighborhood · ZIP 53532These 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.45
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.78
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.22

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.98%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.5%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.8%
PopulationHow many people live in this area.18,206
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.335 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$108,687
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$122,746
Average tempThe average temperature here across a full year.46°F
Annual precipHow much rain and melted snow falls here in a typical year.33 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

3940 Sunnyvale 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 less than 75% of homes in Deforest 53532
  • Has a bigger lot than 79% of homes in Dane County

What homes are worth in Deforest 53532

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

This home
$237K$803K

This home is worth more than 25% of homes in Deforest 53532.

How it measures up in Deforest 53532

The dot is this home. The mark in the middle is the typical home in Deforest 53532.

Estimated value$361,004
CheaperTypical $434,714Pricier

Pricier than 25% of homes nearby

Lot size0.48 ac
SmallerTypical 0.31 acBigger

Bigger than 73% of homes nearby

How 3940 Sunnyvale Dr ranks against every home in each area.
MeasureThis homeDeforest 53532Dane County
Estimated valuepricier than$361,00425% of homes29% of homes
Lot sizebigger than0.48 ac73% of homes79% of homes

About 3940 Sunnyvale Dr

How much is 3940 Sunnyvale Dr, Deforest, WI worth?

The TopHap Estimate for 3940 Sunnyvale Dr, Deforest, WI is $361,004 as of Sep 24, 2026. The likely range is $332,371 to $389,637. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

What schools serve 3940 Sunnyvale Dr, Deforest, WI?

3940 Sunnyvale Dr, Deforest, WI is assigned to Windsor Elementary School (elementary), rated B+; DeForest High School (high), rated A-; DeForest Middle School (middle), rated B. All sit in Deforest Area School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 3940 Sunnyvale Dr, Deforest, WI compare to other homes in Deforest 53532?

Among the 5,885 homes in Deforest 53532, it is worth more than 25% of them ($361,004 against a typical $434,714) and its lot is bigger than 73% of them (0.48 ac against a typical 0.31 ac). Measured against all of Dane County, it is worth more than 29% 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 3940 Sunnyvale Dr, Deforest, WI?

The 2025 property tax bill for 3940 Sunnyvale Dr, Deforest, WI was $6,130. The county assessed it at $445,400.

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Assigned schools

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