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Residential (General/Single)Residential
$374,307$179 / 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 Aug 30, 2026
Last sold for $369,500 on Apr 23, 2026

9510 KNOLLTOP RD

UNION, IL 60180
1.5
Baths
2,086 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.
1.2 ac
Lot SizeThe size of the land the home sits on, from county records.
1972
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$374K
$341K low$408K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$369,500 · Apr 23, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,554 (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.$131,529 (2024)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$18,899
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$112,630
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$118,945
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$394,587

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Residential (General/Single)
CountyMCHENRY
Lot (acres)The size of the land the home sits on, from county records.1.21
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
HeatingThe type of heating system in the home.Central
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

Transaction History(2)

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
Leggee Elementary SchoolA
Elementary · Grades KG–5 · 2.5 mi
H
Huntley High SchoolA
High · Grades 9–12 · 2.8 mi
M
Marlowe Middle SchoolB+
Middle · Grades 6–8 · 5.0 mi

District: Huntley Consolidated School District 158

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

9510 Knolltop Rd 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.

  • Costs less per square foot than 76% of homes in McHenry County
  • Has a bigger lot than 89% of homes in McHenry County
  • Older than 72% 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
$164K$758K

This home is worth more than 46% 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$374,307
CheaperTypical $396,419Pricier

Pricier than 46% of homes nearby

Price per ft²$179
CheaperTypical $188Pricier

Pricier than 45% of homes nearby

Living area2,086 ft²
SmallerTypical 2,116 ft²Bigger

Bigger than 48% of homes nearby

Lot size1.2 ac
SmallerTypical 1.16 acBigger

Bigger than 52% of homes nearby

Year built1972
OlderTypical 1975Newer

Newer than 44% of homes nearby

How 9510 Knolltop Rd ranks against every home in each area.
MeasureThis homeUnion 60180McHenry County
Estimated valuepricier than$374,30746% of homes52% of homes
Price per ft²pricier than$17945% of homes24% of homes
Living areabigger than2,086 ft²48% of homes63% of homes
Lot sizebigger than1.2 ac52% of homes89% of homes
Year builtnewer than197244% of homes28% of homes

About 9510 Knolltop Rd

How much is 9510 Knolltop Rd, Union, IL worth?

The TopHap Estimate for 9510 Knolltop Rd, Union, IL is $374,307 as of Aug 30, 2026. The likely range is $341,078 to $407,536. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 9510 Knolltop Rd, Union, IL last sell?

9510 Knolltop Rd, Union, IL last sold on Apr 23, 2026 for $369,500, according to the county's recorded deed.

How big is 9510 Knolltop Rd, Union, IL?

9510 Knolltop Rd, Union, IL has 1.5 bathrooms, 2,086 square feet of living space and a 1.21-acre lot.

When was 9510 Knolltop Rd, Union, IL built?

9510 Knolltop Rd, Union, IL was built in 1972, making it 54 years old. The building has 1 story.

What schools serve 9510 Knolltop Rd, Union, IL?

9510 Knolltop Rd, Union, IL is assigned to Leggee Elementary School (elementary), rated A; Huntley High School (high), rated A; Marlowe Middle School (middle), rated B+. All sit in Huntley Consolidated School District 158. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 9510 Knolltop Rd, Union, IL compare to other homes in Union 60180?

Among the 652 homes in Union 60180, it is worth more than 46% of them ($374,307 against a typical $396,419), its price per square foot is higher than 45% of them ($179 against a typical $188), it is bigger than 48% of them (2,086 ft² against a typical 2,116 ft²), its lot is bigger than 52% of them (1.2 ac against a typical 1.16 ac) and it is newer than 44% of them (1972 against a typical 1975). Measured against all of McHenry County, it is worth more than 52% 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 9510 Knolltop Rd, Union, IL?

The 2024 property tax bill for 9510 Knolltop Rd, Union, IL was $7,554. The county assessed it at $131,529.

More homes on Knolltop Rd

Closest homes

More homes in Union 60180

Assigned schools

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