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Residential (General/Single)Residential

300B OPATRNY DR

FOX RIVER GROVE, IL 60021
0.87 ac
Lot SizeThe size of the land the home sits on, from county records.
1967
Year BuiltThe year the home was originally built, according to county records.
Built 19672 floors12 units637–809 ft²
$2M
All units combinedThe sum of our current value estimates for every unit in the building — roughly what the whole building's homes are worth together.
$157K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$226
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

+1.5%vs the Fox River Grove ZIP median sale $/ft² ($223)

Sales Performance

$180K
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
—
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
1
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
8.3%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
This building's own appreciationThe building's own appreciation: for every unit that sold twice (held over a year), we compute its yearly price change between the two sales and take the middle value. This is the cleanest read on how this specific building performs, because it compares each unit to itself.
+3.4%per yeartypical hold 7.5 yrsfrom 8 same-unit resales
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
20082009201220132017202120232026
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
20082009201220132017202120232026

25 arms-length sales on record for this building.

Unit Mix & Floor PlansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.

Every unit: size vs estimated valueEvery unit in the building as one dot: across is its size, up is our current value estimate, and color is its bedroom count. Vertical columns of dots are recurring floor plans; the height spread within a column shows how much floor, view and condition move prices for the same layout.
$134K$153K$172K$191K637 ft²671 ft²706 ft²740 ft²775 ft²809 ft²
1 bd2 bd
1 bed
7 units
2 bed
5 units
Recurring floor plansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.
1 bd · 1 ba · 696 ft²
4 units
One-off layouts
8 units

Value DistributionHow the building's units spread across value ranges by our current estimates. A wide spread usually means big differences in size, floor or view.

$134K–$134K
1 unit
$143K–$143K
2 units
$155K–$157K
4 units
$181K–$181K
1 unit
$184K–$191K
4 units

Value by Floor & LineAverage estimated price per square foot by floor range, using unit numbers to infer floors. Higher floors usually price higher — the gap shows how much the view is worth here.

Floor 1
$219/ft²
Floor 2
$229/ft²

Ownership & Financing

Owner-occupiedThe share of units where the owner lives in the unit, per county records. The rest are second homes or rentals.75%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.25%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.9.6 yrs
Cash purchases (5 yrs)The share of purchases in the last 5 years with no mortgage recorded. High cash share is common in second-home and investor buildings.29%
Avg. loan-to-valueAverage current loan balance against unit value across the building. Low numbers mean owners hold lots of equity — a sign of financial stability.16%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$161,474
Median tax billThe middle annual property tax bill among the building's units.$3,634
Pre-foreclosure noticesUnits with an active pre-foreclosure or foreclosure notice on file.0

Recent SalesThe latest recorded arms-length sales in the building, newest first.

Unit 126Feb 27, 2026$180,000BuildingApr 24, 2023$112,500Unit 126Mar 24, 2023$134,500Unit 131Dec 8, 2022$115,000Unit 223Nov 14, 2022$135,000Unit 221Mar 11, 2022$105,000Unit 121Aug 20, 2021$100,000Unit 230Dec 7, 2017$85,000BuildingNov 20, 2015$66,500Unit 231Jan 10, 2013$57,000

Values are TopHap estimates, not appraisals. Sales, ownership and tax figures come from recorded county documents via ATTOM and can lag by several weeks.

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,242 (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.$41,832 (2024)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$7,917
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$33,915
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$37,414
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$125,496

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.0.87
PoolWhether the property has a pool, and what kind, such as in-ground.No

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.

M
Fox River Grove Middle SchoolB
Middle · Grades 5–8 · 0.3 mi
E
Algonquin Road Elementary SchoolA
Elementary · Grades PK–4 · 0.8 mi
H
Cary-Grove High SchoolA+
High · Grades 9–12 · 1.9 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.Absentee owner
Company ownedWhether the owner is a company or trust rather than a person.No

All UnitsEvery property record the county has at this street address, such as the units in a condo building. Prices shown are our estimates, not asking prices.

300b Opatrny Dr
2 bd · 1 ba · 803 ft²
$183K
300b Opatrny Dr
1 bd · 1 ba · 693 ft²
$139K
300b Opatrny Dr
2 bd · 1 ba · 779 ft²
$183K
300b Opatrny Dr
1 bd · 1 ba · 692 ft²
$143K
300b Opatrny Dr
1 bd · 1 ba · 637 ft²
$134K
300b Opatrny Dr
1 bd · 1 ba · 637 ft²
$134K
300b Opatrny Dr # 121
1 bd · 1 ba · 696 ft²
$157K
300b Opatrny Dr # 122
1 bd · 1 ba · 693 ft²
$143K
300b Opatrny Dr # 124
2 bd · 1 ba · 806 ft²
$184K
300b Opatrny Dr # 126
2 bd · 1 ba · 789 ft²
$181K
300b Opatrny Dr # 128
1 bd · 1 ba · 637 ft²
$134K
300b Opatrny Dr # 131
1 bd · 1 ba · 696 ft²
$157K
300b Opatrny Dr # 132
1 bd · 1 ba · 692 ft²
$143K
300b Opatrny Dr # 221
1 bd · 1 ba · 696 ft²
$155K
300b Opatrny Dr # 223
2 bd · 1 ba · 803 ft²
$191K
300b Opatrny Dr # 229
2 bd · 1 ba · 807 ft²
$184K
300b Opatrny Dr # 230
2 bd · 1 ba · 809 ft²
$184K
300b Opatrny Dr # 231
1 bd · 1 ba · 696 ft²
$157K

Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

About 300b Opatrny Dr

How many units are in 300b Opatrny Dr, Fox River Grove, IL?

300b Opatrny Dr, Fox River Grove, IL has 12 residential units across 2 floors, built in 1967, according to county assessor records.

What is a unit at 300b Opatrny Dr, Fox River Grove, IL worth?

The median TopHap Estimate across the 12 units at 300b Opatrny Dr, Fox River Grove, IL is $157,468. That works out to $226 per square foot. Units run from 637 to 809 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 300b Opatrny Dr, Fox River Grove, IL expensive for Fox River Grove?

Units at 300b Opatrny Dr, Fox River Grove, IL carry a median of $226 per square foot, 1% above the Fox River Grove median of $223 per square foot.

How often do units sell at 300b Opatrny Dr, Fox River Grove, IL?

1 units at 300b Opatrny Dr, Fox River Grove, IL sold in the last 12 months, out of 25 recorded arms-length sales all time. That is a turnover rate of 8.3% of the building per year. The median sale over that period was $180K.

Have units at 300b Opatrny Dr, Fox River Grove, IL appreciated?

Across 8 repeat sales of the same unit, 300b Opatrny Dr, Fox River Grove, IL returned a median 3.4% per year. Because each pair is the same unit bought and sold, the figure is not distorted by which units traded. The median owner held for 7.5 years.

What floor plans does 300b Opatrny Dr, Fox River Grove, IL have?

The most common plan at 300b Opatrny Dr, Fox River Grove, IL is a 1-bedroom of 696 square feet, repeated 4 times, with a median estimate of $157,468. TopHap identifies 1 recurring plans in the building.

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