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Single Family ResidenceResidential
$238,391$110 / 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 91How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026
Last sold for $215,000 on Oct 1, 2024

17508 JEFFERSON ST

UNION, IL 60180
2
Baths
2,163 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.
0.23 ac
Lot SizeThe size of the land the home sits on, from county records.
1905
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$238K
$217K low$260K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$215,000 · Oct 1, 2024

Tax & Assessment

Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$50,984 (2024)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$8,151
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$42,833
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$46,106
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$152,952

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.41 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.1 percent flood zone

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
CountyMCHENRY
Lot (acres)The size of the land the home sits on, from county records.0.23
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.DeckPatio · 165 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.

H
Marengo High SchoolB-
High · Grades 9–12 · 2.6 mi
M
Marengo Community Middle SchoolB-
Middle · Grades 6–8 · 3.0 mi
E
Locust Elementary SchoolB+
Elementary · Grades PK–3 · 3.1 mi

District: Marengo-Union Elementary Consolidated District 165

Neighborhood · ZIP 60180These 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.84
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.108
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.48

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.22%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.0%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.6%
PopulationHow many people live in this area.3,015
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.145 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$125,446
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$133,187
Average tempThe average temperature here across a full year.48°F
Annual precipHow much rain and melted snow falls here in a typical year.36 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

17508 Jefferson 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 90% of homes in Union 60180
  • Among the lowest price per square foot in McHenry County
  • Bigger than 65% of homes in McHenry County
  • Has a smaller lot than 90% of homes in Union 60180
  • Older than 98% of homes in McHenry County

What homes are worth in Union 60180

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

This home
$177K$815K

This home is worth more than 10% of homes in Union 60180.

How it measures up in Union 60180

The dot is this home. The mark in the middle is the typical home in Union 60180.

Estimated value$238,391
CheaperTypical $404,045Pricier

Pricier than 10% of homes nearby

Price per ft²$110
CheaperTypical $186Pricier

Pricier than 7% of homes nearby

Living area2,163 ft²
SmallerTypical 2,170 ft²Bigger

Bigger than 50% of homes nearby

Lot size0.23 ac
SmallerTypical 1.16 acBigger

Bigger than 10% of homes nearby

Year built1905
OlderTypical 1975Newer

Newer than 4% of homes nearby

How 17508 Jefferson St ranks against every home in each area.
MeasureThis homeUnion 60180McHenry County
Estimated valuepricier than$238,39110% of homes12% of homes
Price per ft²pricier than$1107% of homesalmost no homes
Living areabigger than2,163 ft²50% of homes65% of homes
Lot sizebigger than0.23 ac10% of homes37% of homes
Year builtnewer than19054% of homes2% of homes

About 17508 Jefferson St

How much is 17508 Jefferson St, Union, IL worth?

The TopHap Estimate for 17508 Jefferson St, Union, IL is $238,391 as of Oct 21, 2026. The likely range is $216,509 to $260,273. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 17508 Jefferson St, Union, IL last sell?

17508 Jefferson St, Union, IL last sold on Oct 1, 2024 for $215,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 17508 Jefferson St, Union, IL?

17508 Jefferson St, Union, IL has 2 bathrooms, 2,163 square feet of living space and a 0.23-acre lot.

When was 17508 Jefferson St, Union, IL built?

17508 Jefferson St, Union, IL was built in 1905, making it 121 years old. The building has 2 stories.

What schools serve 17508 Jefferson St, Union, IL?

17508 Jefferson St, Union, IL is assigned to Marengo High School (high), rated B-; Marengo Community Middle School (middle), rated B-; Locust Elementary School (elementary), rated B+. All sit in Marengo-Union Elementary Consolidated District 165. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 17508 Jefferson St, Union, IL compare to other homes in Union 60180?

Among the 655 homes in Union 60180, it is worth more than 10% of them ($238,391 against a typical $404,045), its price per square foot is higher than 7% of them ($110 against a typical $186), it is bigger than 50% of them (2,163 ft² against a typical 2,170 ft²), its lot is bigger than 10% of them (0.23 ac against a typical 1.16 ac) and it is newer than 4% of them (1905 against a typical 1975). Measured against all of McHenry County, it is worth more than 12% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

More homes on Jefferson St

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