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Single Family ResidenceResidential
$180,011$105 / 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 Sep 24, 2026

503 UNION ST

FAIRMONT, MN 56031
4
Beds
0.5
Baths
1,714 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.
1973
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$180K
$163K low$197K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,348 (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.$183,500 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$23,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$160,300
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$181,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$183,500

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.34
35
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
14
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
64
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
52
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
9
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.6 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%

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
StyleThe architectural style of the home, such as ranch or colonial.Split Foyer
CountyMARTIN
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1977
Lot (acres)The size of the land the home sits on, from county records.0.27
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
CoolingThe type of cooling or air conditioning in the home.Central
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

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

M
Fairmont Jr./Sr. High SchoolB-
Middle · Grades 7–12 · 1.1 mi
E
Fairmont Elementary SchoolD+
Elementary · Grades PK–6 · 1.2 mi

District: Fairmont Area School District

Neighborhood · ZIP 56031These 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.115
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.96
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.9

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.92%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.16%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.12%
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.11,702
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.74 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$68,928
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$78,737
Average tempThe average temperature here across a full year.45°F
Annual precipHow much rain and melted snow falls here in a typical year.31 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

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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

503 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.

  • Bigger than 67% of homes in Fairmont 56031
  • Newer than 73% of homes in Martin County

What homes are worth in Fairmont 56031

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

This home
$38K$634K

This home is worth more than 55% of homes in Fairmont 56031.

How it measures up in Fairmont 56031

The dot is this home. The mark in the middle is the typical home in Fairmont 56031.

Estimated value$180,011
CheaperTypical $164,346Pricier

Pricier than 55% of homes nearby

Price per ft²$105
CheaperTypical $120Pricier

Pricier than 39% of homes nearby

Living area1,714 ft²
SmallerTypical 1,442 ft²Bigger

Bigger than 67% of homes nearby

Lot size0.27 ac
SmallerTypical 0.24 acBigger

Bigger than 56% of homes nearby

Year built1973
OlderTypical 1953Newer

Newer than 71% of homes nearby

How 503 Union St ranks against every home in each area.
MeasureThis homeFairmont 56031Martin County
Estimated valuepricier than$180,01155% of homes60% of homes
Price per ft²pricier than$10539% of homes46% of homes
Living areabigger than1,714 ft²67% of homes65% of homes
Lot sizebigger than0.27 ac56% of homes44% of homes
Year builtnewer than197371% of homes73% of homes

About 503 Union St

How much is 503 Union St, Fairmont, MN worth?

The TopHap Estimate for 503 Union St, Fairmont, MN is $180,011 as of Sep 24, 2026. The likely range is $162,592 to $197,430. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 503 Union St, Fairmont, MN last sell?

503 Union St, Fairmont, MN last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 503 Union St, Fairmont, MN?

503 Union St, Fairmont, MN has 4 bedrooms, 0.5 bathrooms, 1,714 square feet of living space and a 0.27-acre lot.

When was 503 Union St, Fairmont, MN built?

503 Union St, Fairmont, MN was built in 1973, making it 53 years old. It is a split foyer home. The building has 1 story.

What schools serve 503 Union St, Fairmont, MN?

503 Union St, Fairmont, MN is assigned to Fairmont Jr./Sr. High School (middle), rated B-; Fairmont Elementary School (elementary), rated D+. All sit in Fairmont Area School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 503 Union St, Fairmont, MN compare to other homes in Fairmont 56031?

Among the 5,139 homes in Fairmont 56031, it is worth more than 55% of them ($180,011 against a typical $164,346), its price per square foot is higher than 39% of them ($105 against a typical $120), it is bigger than 67% of them (1,714 ft² against a typical 1,442 ft²), its lot is bigger than 56% of them (0.27 ac against a typical 0.24 ac) and it is newer than 71% of them (1973 against a typical 1953). Measured against all of Martin County, it is worth more than 60% 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 503 Union St, Fairmont, MN?

The 2025 property tax bill for 503 Union St, Fairmont, MN was $2,348. The county assessed it at $183,500.

More homes on Union St

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More homes in Fairmont 56031

Assigned schools

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