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Rural ResidenceResidential
$793,635
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 76How 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

21805 RIVER RD

MARENGO, IL 60152
0
Baths
98.68 ac
Lot SizeThe size of the land the home sits on, from county records.

Valuation

$794K
$602K low$985K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$12,989 (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.$221,144 (2024)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$124,711
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$96,433
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$196,116
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$663,432

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.28 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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.Rural Residence
CountyMcHenry
Lot (acres)The size of the land the home sits on, from county records.98.68
HeatingThe type of heating system in the home.None

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

M
Marengo Community Middle SchoolC
Middle · Grades 6–8 · 2.6 mi
E
Locust Elementary SchoolA
Elementary · Grades PK–3 · 2.7 mi
H
Marengo High SchoolA-
High · Grades 9–12 · 2.9 mi

District: Marengo-Union Elementary Consolidated District 165

Neighborhood · ZIP 60152These 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.109
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.98
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.40

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.19%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.3%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.5%
PopulationHow many people live in this area.12,669
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.134 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$100,828
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$116,862
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

21805 River 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.

  • Worth more than 98% of homes in Marengo 60152
  • Among the largest lots in Marengo 60152

What homes are worth in Marengo 60152

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

This home
$173K$815K

This home is worth more than 98% of homes in Marengo 60152.

How it measures up in Marengo 60152

The dot is this home. The mark in the middle is the typical home in Marengo 60152.

Estimated value$793,635
CheaperTypical $359,358Pricier

Pricier than 98% of homes nearby

Lot size98.68 ac
SmallerTypical 0.5 acBigger

Bigger than almost all homes nearby

How 21805 River Rd ranks against every home in each area.
MeasureThis homeMarengo 60152McHenry County
Estimated valuepricier than$793,63598% of homes98% of homes
Lot sizebigger than98.68 acalmost all homesalmost all homes

About 21805 River Rd

How much is 21805 River Rd, Marengo, IL worth?

The TopHap Estimate for 21805 River Rd, Marengo, IL is $793,635 as of Aug 30, 2026. The likely range is $601,892 to $985,378. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21805 River Rd, Marengo, IL last sell?

21805 River Rd, Marengo, IL last sold on Jan 3, 2018, according to the county's recorded deed.

What schools serve 21805 River Rd, Marengo, IL?

21805 River Rd, Marengo, IL is assigned to Marengo Community Middle School (middle), rated C; Locust Elementary School (elementary), rated A; Marengo High School (high), rated A-. All sit in Marengo-Union Elementary Consolidated District 165. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21805 River Rd, Marengo, IL compare to other homes in Marengo 60152?

Among the 4,436 homes in Marengo 60152, it is worth more than 98% of them ($793,635 against a typical $359,358) and its lot is bigger than almost all of them (98.68 ac against a typical 0.5 ac). Measured against all of McHenry County, it is worth more than 98% 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 21805 River Rd, Marengo, IL?

The 2024 property tax bill for 21805 River Rd, Marengo, IL was $12,989. The county assessed it at $221,144.

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Assigned schools

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