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Single Family ResidenceResidential
$289,117$212 / 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 96How 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

402 S RIVER RD

ALGONQUIN, IL 60102
2
Baths
1,365 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.
0.16 ac
Lot SizeThe size of the land the home sits on, from county records.
1922
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$289K
$276K low$302K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,343 (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.$71,523 (2024)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$10,781
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$60,742
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$63,968
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$214,569

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.122 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.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Cape Cod
CountyMcHenry
Lot (acres)The size of the land the home sits on, from county records.0.16
HeatingThe type of heating system in the home.Forced Air

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

M
Algonquin Middle SchoolB
Middle · Grades 6–8 · 0.5 mi
E
Eastview Elementary SchoolA
Elementary · Grades KG–5 · 0.6 mi
H
Dundee-Crown High SchoolB
High · Grades 9–12 · 2.3 mi

District: Community Unit School District 300

Neighborhood · ZIP 60102These 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.68
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.111
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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.26%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.7%
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.29,705
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,882 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$126,290
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$145,923
Average tempThe average temperature here across a full year.48°F
Annual precipHow much rain and melted snow falls here in a typical year.37 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

402 S 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 less than 90% of homes in Algonquin 60102
  • Smaller than 82% of homes in Algonquin 60102
  • Has a smaller lot than 89% of homes in Algonquin 60102
  • Among the oldest homes in Algonquin 60102

What homes are worth in Algonquin 60102

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

This home
$239K$676K

This home is worth more than 10% of homes in Algonquin 60102.

How it measures up in Algonquin 60102

The dot is this home. The mark in the middle is the typical home in Algonquin 60102.

Estimated value$289,117
CheaperTypical $425,742Pricier

Pricier than 10% of homes nearby

Price per ft²$212
CheaperTypical $204Pricier

Pricier than 59% of homes nearby

Living area1,365 ft²
SmallerTypical 1,998 ft²Bigger

Bigger than 18% of homes nearby

Lot size0.16 ac
SmallerTypical 0.27 acBigger

Bigger than 11% of homes nearby

Year built1922
OlderTypical 1993Newer

Older than almost all homes nearby

How 402 S River Rd ranks against every home in each area.
MeasureThis homeAlgonquin 60102McHenry County
Estimated valuepricier than$289,11710% of homes28% of homes
Price per ft²pricier than$21259% of homes56% of homes
Living areabigger than1,365 ft²18% of homes29% of homes
Lot sizebigger than0.16 ac11% of homes13% of homes
Year builtnewer than1922almost no homes4% of homes

About 402 S River Rd

How much is 402 S River Rd, Algonquin, IL worth?

The TopHap Estimate for 402 S River Rd, Algonquin, IL is $289,117 as of Aug 30, 2026. The likely range is $276,355 to $301,879. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 402 S River Rd, Algonquin, IL?

402 S River Rd, Algonquin, IL has 2 bathrooms, 1,365 square feet of living space and a 0.16-acre lot.

When was 402 S River Rd, Algonquin, IL built?

402 S River Rd, Algonquin, IL was built in 1922, making it 104 years old. It is a cape cod home. The building has 2 stories.

What schools serve 402 S River Rd, Algonquin, IL?

402 S River Rd, Algonquin, IL is assigned to Algonquin Middle School (middle), rated B; Eastview Elementary School (elementary), rated A; Dundee-Crown High School (high), rated B. All sit in Community Unit School District 300. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 402 S River Rd, Algonquin, IL compare to other homes in Algonquin 60102?

Among the 11,780 homes in Algonquin 60102, it is worth more than 10% of them ($289,117 against a typical $425,742), its price per square foot is higher than 59% of them ($212 against a typical $204), it is bigger than 18% of them (1,365 ft² against a typical 1,998 ft²), its lot is bigger than 11% of them (0.16 ac against a typical 0.27 ac) and it is newer than almost none of them (1922 against a typical 1993). Measured against all of McHenry County, it is worth more than 28% 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 402 S River Rd, Algonquin, IL?

The 2024 property tax bill for 402 S River Rd, Algonquin, IL was $4,343. The county assessed it at $71,523.

More homes on S River Rd

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More homes in Algonquin 60102

Assigned schools

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