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Residential - Vacant LandResidential
$297,083
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 53How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026

102 KEYSTONE AVE

FOX RIVER GROVE, IL 60021
0
Baths
0.27 ac
Lot SizeThe size of the land the home sits on, from county records.

Valuation

$297K
$156K low$438K high
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$297,083
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$237,666

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$752 (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.$7,849 (2024)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$7,849
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$7,020
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$23,547

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.107 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.Residential - Vacant Land
CountyMcHenry
HeatingThe type of heating system in the home.None

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
Algonquin Road Elementary SchoolA
Elementary · Grades PK–4 · 0.5 mi
M
Fox River Grove Middle SchoolB
Middle · Grades 5–8 · 1.3 mi
H
Cary-Grove High SchoolA+
High · Grades 9–12 · 2.1 mi

District: Community High School District 155

Neighborhood · ZIP 60021These 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.103
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.112
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.47

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.35%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.1.6%
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.4,143
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,790 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$123,036
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$130,388
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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

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

102 Keystone 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 74% of homes in Fox River Grove 60021

What homes are worth in Fox River Grove 60021

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

This home
$143K$788K

This home is worth more than 26% of homes in Fox River Grove 60021.

How it measures up in Fox River Grove 60021

The dot is this home. The mark in the middle is the typical home in Fox River Grove 60021.

Estimated value$297,083
CheaperTypical $383,657Pricier

Pricier than 26% of homes nearby

Lot size0.27 ac
SmallerTypical 0.26 acBigger

Bigger than 51% of homes nearby

How 102 Keystone Ave ranks against every home in each area.
MeasureThis homeFox River Grove 60021McHenry County
Estimated valuepricier than$297,08326% of homes31% of homes
Lot sizebigger than0.27 ac51% of homes53% of homes

About 102 Keystone Ave

How much is 102 Keystone Ave, Fox River Grove, IL worth?

The TopHap Estimate for 102 Keystone Ave, Fox River Grove, IL is $297,083 as of Jul 14, 2026. The likely range is $156,432 to $437,734. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 102 Keystone Ave, Fox River Grove, IL last sell?

102 Keystone Ave, Fox River Grove, IL last sold on Feb 29, 2016, according to the county's recorded deed.

What schools serve 102 Keystone Ave, Fox River Grove, IL?

102 Keystone Ave, Fox River Grove, IL is assigned to Algonquin Road Elementary School (elementary), rated A; Fox River Grove Middle School (middle), rated B; Cary-Grove High School (high), rated A+. All sit in Community High School District 155. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 102 Keystone Ave, Fox River Grove, IL compare to other homes in Fox River Grove 60021?

Among the 2,062 homes in Fox River Grove 60021, it is worth more than 26% of them ($297,083 against a typical $383,657) and its lot is bigger than 51% of them (0.27 ac against a typical 0.26 ac). Measured against all of McHenry County, it is worth more than 31% 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 102 Keystone Ave, Fox River Grove, IL?

The 2024 property tax bill for 102 Keystone Ave, Fox River Grove, IL was $752. The county assessed it at $7,849.

Closest homes

More homes in Fox River Grove 60021

Assigned schools

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