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Single Family ResidenceResidential
$389,635$372 / 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
Last sold for $191,500 on Dec 20, 2005

921 CASTLE DR

SUN PRAIRIE, WI 53590
3
Beds
2
Baths
1,048 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.
0.26 ac
Lot SizeThe size of the land the home sits on, from county records.
1987
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$390K
$377K low$402K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$191,500 · Dec 20, 2005

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,328 (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.$321,600 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$75,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$246,300
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$321,600
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$364,700

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.Bi-Level
CountyDane
Lot (acres)The size of the land the home sits on, from county records.0.26
HeatingThe type of heating system in the home.Forced Air
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, Attached
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.Deck · 438 ft²

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

E
Westside Elementary SchoolC-
Elementary · Grades KG–5 · 0.8 mi
M
Prairie View Middle SchoolD+
Middle · Grades 6–8 · 1.4 mi
H
Sun Prairie East High SchoolA
High · Grades 9–12 · 1.4 mi

District: Sun Prairie Area School District

Neighborhood · ZIP 53590These 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.70
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.87
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.21

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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.36%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.8%
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.45,977
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.667 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$97,632
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$119,189
Average tempThe average temperature here across a full year.46°F
Annual precipHow much rain and melted snow falls here in a typical year.34 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

921 Castle 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 67% of homes in Sun Prairie 53590
  • Costs more per square foot than 97% of homes in Sun Prairie 53590
  • Smaller than 94% of homes in Sun Prairie 53590
  • Has a bigger lot than 88% of homes in Prairie Enterprises
  • Newer than 70% of homes in Prairie Enterprises

What homes are worth in Sun Prairie 53590

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

This home
$242K$907K

This home is worth more than 33% of homes in Sun Prairie 53590.

How it measures up in Sun Prairie 53590

The dot is this home. The mark in the middle is the typical home in Sun Prairie 53590.

Estimated value$389,635
CheaperTypical $438,865Pricier

Pricier than 33% of homes nearby

Price per ft²$372
CheaperTypical $263Pricier

Pricier than 97% of homes nearby

Living area1,048 ft²
SmallerTypical 1,504 ft²Bigger

Bigger than 6% of homes nearby

Lot size0.26 ac
SmallerTypical 0.26 acBigger

Bigger than 49% of homes nearby

Year built1987
OlderTypical 1994Newer

Newer than 39% of homes nearby

How 921 Castle Dr ranks against every home in each area.
MeasureThis homePrairie EnterprisesSun Prairie 53590Dane County
Estimated valuepricier than$389,63543% of homes33% of homes37% of homes
Price per ft²pricier than$37292% of homes97% of homes88% of homes
Living areabigger than1,048 ft²16% of homes6% of homes10% of homes
Lot sizebigger than0.26 ac88% of homes49% of homes49% of homes
Year builtnewer than198770% of homes39% of homes60% of homes

About 921 Castle Dr

How much is 921 Castle Dr, Sun Prairie, WI worth?

The TopHap Estimate for 921 Castle Dr, Sun Prairie, WI is $389,635 as of Sep 24, 2026. The likely range is $376,887 to $402,383. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 921 Castle Dr, Sun Prairie, WI last sell?

921 Castle Dr, Sun Prairie, WI last sold on Dec 20, 2005 for $191,500, according to the county's recorded deed.

How big is 921 Castle Dr, Sun Prairie, WI?

921 Castle Dr, Sun Prairie, WI has 3 bedrooms, 2 bathrooms, 1,048 square feet of living space and a 0.26-acre lot.

When was 921 Castle Dr, Sun Prairie, WI built?

921 Castle Dr, Sun Prairie, WI was built in 1987, making it 39 years old. It is a bi-level home. The building has 1 story.

What schools serve 921 Castle Dr, Sun Prairie, WI?

921 Castle Dr, Sun Prairie, WI is assigned to Westside Elementary School (elementary), rated C-; Prairie View Middle School (middle), rated D+; Sun Prairie East High School (high), rated A. All sit in Sun Prairie Area School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 921 Castle Dr, Sun Prairie, WI compare to other homes in Sun Prairie 53590?

Among the 13,564 homes in Sun Prairie 53590, it is worth more than 33% of them ($389,635 against a typical $438,865), its price per square foot is higher than 97% of them ($372 against a typical $263), it is bigger than 6% of them (1,048 ft² against a typical 1,504 ft²), its lot is bigger than 49% of them (0.26 ac against a typical 0.26 ac) and it is newer than 39% of them (1987 against a typical 1994). Measured against all of Dane County, it is worth more than 37% 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 921 Castle Dr, Sun Prairie, WI?

The 2025 property tax bill for 921 Castle Dr, Sun Prairie, WI was $6,328. The county assessed it at $321,600.

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