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Single Family ResidenceResidential
$291,996$374 / 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 90How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $137,500 on Dec 9, 2024

831 UNION ST

HARTFORD, WI 53027
2
Beds
1
Baths
780 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.
1.28 ac
Lot SizeThe size of the land the home sits on, from county records.
1947
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$292K
$262K low$322K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$137,500 · Dec 9, 2024

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,176 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$205,200 (2024)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$75,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$129,700
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$205,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$230,843

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyWashington
Lot (acres)The size of the land the home sits on, from county records.1.28
RoofThe main material covering the roof, such as asphalt shingle or tile.Metal
HeatingThe type of heating system in the home.Forced Air
CoolingThe type of cooling or air conditioning in the home.None
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 · 144 ft²

Transaction History(3)

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
Rossman Elementary SchoolA-
Elementary · Grades PK–5 · 0.3 mi
H
Hartford High SchoolC
High · Grades 9–12 · 1.4 mi
M
Central Middle SchoolC-
Middle · Grades 6–8 · 1.6 mi

District: Hartford Union High School District

Neighborhood · ZIP 53027These 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.100
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.81
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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.20%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.4%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.24,479
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.258 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$88,697
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$104,318
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

831 Union 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.

  • Worth less than 83% of homes in Hartford 53027
  • Among the highest price per square foot in Hartford 53027
  • Among the smallest homes in Hartford 53027
  • Has a bigger lot than 73% of homes in Hartford 53027
  • Older than 88% of homes in Washington County

What homes are worth in Hartford 53027

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

This home
$202K$1M

This home is worth more than 17% of homes in Hartford 53027.

How it measures up in Hartford 53027

The dot is this home. The mark in the middle is the typical home in Hartford 53027.

Estimated value$291,996
CheaperTypical $410,235Pricier

Pricier than 17% of homes nearby

Price per ft²$374
CheaperTypical $220Pricier

Pricier than almost all homes nearby

Living area780 ft²
SmallerTypical 1,698 ft²Bigger

Smaller than almost all homes nearby

Lot size1.28 ac
SmallerTypical 0.33 acBigger

Bigger than 73% of homes nearby

Year built1947
OlderTypical 1997Newer

Newer than 18% of homes nearby

How 831 Union St ranks against every home in each area.
MeasureThis homeHartford 53027Washington County
Estimated valuepricier than$291,99617% of homes20% of homes
Price per ft²pricier than$374almost all homesalmost all homes
Living areabigger than780 ft²almost no homesalmost no homes
Lot sizebigger than1.28 ac73% of homes69% of homes
Year builtnewer than194718% of homes12% of homes

About 831 Union St

How much is 831 Union St, Hartford, WI worth?

The TopHap Estimate for 831 Union St, Hartford, WI is $291,996 as of Aug 30, 2026. The likely range is $262,212 to $321,780. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 831 Union St, Hartford, WI last sell?

831 Union St, Hartford, WI last sold on Dec 9, 2024 for $137,500, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 831 Union St, Hartford, WI?

831 Union St, Hartford, WI has 2 bedrooms, 1 bathrooms, 780 square feet of living space and a 1.28-acre lot.

When was 831 Union St, Hartford, WI built?

831 Union St, Hartford, WI was built in 1947, making it 79 years old. The building has 1 story.

What schools serve 831 Union St, Hartford, WI?

831 Union St, Hartford, WI is assigned to Rossman Elementary School (elementary), rated A-; Hartford High School (high), rated C; Central Middle School (middle), rated C-. All sit in Hartford Union High School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 831 Union St, Hartford, WI compare to other homes in Hartford 53027?

Among the 8,592 homes in Hartford 53027, it is worth more than 17% of them ($291,996 against a typical $410,235), its price per square foot is higher than almost all of them ($374 against a typical $220), it is bigger than almost none of them (780 ft² against a typical 1,698 ft²), its lot is bigger than 73% of them (1.28 ac against a typical 0.33 ac) and it is newer than 18% of them (1947 against a typical 1997). Measured against all of Washington County, it is worth more than 20% 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 831 Union St, Hartford, WI?

The 2024 property tax bill for 831 Union St, Hartford, WI was $2,176. The county assessed it at $205,200.

More homes on Union St

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Assigned schools

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