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Single Family ResidenceResidential
$169,076$313 / 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
Last sold for $130,000 on Jan 5, 2024

509 S UNION AVE

FERGUS FALLS, MN 56537
3
Beds
1
Baths
540 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.
0.25 ac
Lot SizeThe size of the land the home sits on, from county records.
1897
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$169K
$152K low$187K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$130,000 · Jan 5, 2024

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,036 (2026)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$199,900 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$16,100
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$183,800
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$193,100
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$199,900

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.38
68
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
7
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
46
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
40
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
31
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.14 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%

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.A-Frame
CountyOTTER TAIL
Lot (acres)The size of the land the home sits on, from county records.0.25
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.Asphalt
HeatingThe type of heating system in the home.Radiant
CoolingThe type of cooling or air conditioning in the home.None
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
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.Patio · 160 ft²Porch · 404 ft²

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

E
Adams Elementary School
Elementary · Grades 1–3 · 0.3 mi
M
Iq Academy 9-12C-
Middle · Grades 9–12 · 0.8 mi

District: Fergus Falls Public School District

Neighborhood · ZIP 56537These 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.94
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.89
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.20

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.90%
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.7.3%
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.19,451
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.64 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$65,087
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$83,018
Average tempThe average temperature here across a full year.42°F
Annual precipHow much rain and melted snow falls here in a typical year.23 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.59%

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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

509 S Union Ave 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 85% of homes in Otter Tail County
  • Costs more per square foot than 74% of homes in Fergus Falls 56537
  • Smaller than 92% of homes in Fergus Falls 56537
  • Has a smaller lot than 80% of homes in Otter Tail County
  • Older than 98% of homes in Otter Tail County

What homes are worth in Fergus Falls 56537

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

This home
$95K$681K

This home is worth more than 23% of homes in Fergus Falls 56537.

How it measures up in Fergus Falls 56537

The dot is this home. The mark in the middle is the typical home in Fergus Falls 56537.

Estimated value$169,076
CheaperTypical $257,304Pricier

Pricier than 23% of homes nearby

Price per ft²$313
CheaperTypical $238Pricier

Pricier than 74% of homes nearby

Living area540 ft²
SmallerTypical 1,040 ft²Bigger

Bigger than 8% of homes nearby

Lot size0.25 ac
SmallerTypical 0.36 acBigger

Bigger than 38% of homes nearby

Year built1897
OlderTypical 1967Newer

Newer than 5% of homes nearby

How 509 S Union Ave ranks against every home in each area.
MeasureThis homeFergus Falls 56537Otter Tail County
Estimated valuepricier than$169,07623% of homes15% of homes
Price per ft²pricier than$31374% of homes49% of homes
Living areabigger than540 ft²8% of homes12% of homes
Lot sizebigger than0.25 ac38% of homes20% of homes
Year builtnewer than18975% of homes2% of homes

About 509 S Union Ave

How much is 509 S Union Ave, Fergus Falls, MN worth?

The TopHap Estimate for 509 S Union Ave, Fergus Falls, MN is $169,076 as of Sep 24, 2026. The likely range is $151,649 to $186,503. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 509 S Union Ave, Fergus Falls, MN last sell?

509 S Union Ave, Fergus Falls, MN last sold on Jan 5, 2024 for $130,000, according to the county's recorded deed.

How big is 509 S Union Ave, Fergus Falls, MN?

509 S Union Ave, Fergus Falls, MN has 3 bedrooms, 1 bathrooms, 540 square feet of living space and a 0.25-acre lot.

When was 509 S Union Ave, Fergus Falls, MN built?

509 S Union Ave, Fergus Falls, MN was built in 1897, making it 129 years old. It is a a-frame home. The building has 1 story.

What schools serve 509 S Union Ave, Fergus Falls, MN?

509 S Union Ave, Fergus Falls, MN is assigned to Adams Elementary School (elementary); Iq Academy 9-12 (middle), rated C-. All sit in Fergus Falls Public School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 509 S Union Ave, Fergus Falls, MN compare to other homes in Fergus Falls 56537?

Among the 8,855 homes in Fergus Falls 56537, it is worth more than 23% of them ($169,076 against a typical $257,304), its price per square foot is higher than 74% of them ($313 against a typical $238), it is bigger than 8% of them (540 ft² against a typical 1,040 ft²), its lot is bigger than 38% of them (0.25 ac against a typical 0.36 ac) and it is newer than 5% of them (1897 against a typical 1967). Measured against all of Otter Tail County, it is worth more than 15% 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 509 S Union Ave, Fergus Falls, MN?

The 2026 property tax bill for 509 S Union Ave, Fergus Falls, MN was $2,036. The county assessed it at $199,900.

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