Skip to content
Skip to content
TopHapOpen in map
Single Family ResidentialResidential
$222,427$118 / 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 85How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026

604 MAIN ST

MAZON, IL 60444
0
Baths
1,892 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.
0.29 ac
Lot SizeThe size of the land the home sits on, from county records.
1920
Year BuiltThe year the home was originally built, according to county records.

Valuation

$222K
$189K low$256K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,752 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$63,098 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$7,779
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$55,319
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$59,826
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$189,294

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residential
CountyGRUNDY
Lot (acres)The size of the land the home sits on, from county records.0.29
PoolWhether the property has a pool, and what kind, such as in-ground.No

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
Mazon-Verona-Kinsman Elementary SchoolB
Elementary · Grades PK–4 · 0.4 mi
M
Mazon-Verona-Kinsman Middle SchoolC
Middle · Grades 5–8 · 0.5 mi
H
Seneca High SchoolC-
High · Grades 9–12 · 10.7 mi

District: Seneca Township High School District 160

Neighborhood · ZIP 60444These 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.101
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.70
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.46

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.13%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.2%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.9%
PopulationHow many people live in this area.2,465
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.50 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$95,182
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$116,874
Average tempThe average temperature here across a full year.50°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%

Owner Tools

Do you own this home?
Claim this home

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

604 Main St 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 81% of homes in Grundy County
  • Costs less per square foot than 95% of homes in Grundy County
  • Has a smaller lot than 77% of homes in Mazon 60444
  • Older than 89% of homes in Grundy County

What homes are worth in Mazon 60444

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

This home
$102K$1.3M

This home is worth more than 36% of homes in Mazon 60444.

How it measures up in Mazon 60444

The dot is this home. The mark in the middle is the typical home in Mazon 60444.

Estimated value$222,427
CheaperTypical $268,566Pricier

Pricier than 36% of homes nearby

Price per ft²$118
CheaperTypical $166Pricier

Pricier than 19% of homes nearby

Living area1,892 ft²
SmallerTypical 1,641 ft²Bigger

Bigger than 62% of homes nearby

Lot size0.29 ac
SmallerTypical 0.59 acBigger

Bigger than 23% of homes nearby

Year built1920
OlderTypical 1973Newer

Newer than 21% of homes nearby

How 604 Main St ranks against every home in each area.
MeasureThis homeMazon 60444Grundy County
Estimated valuepricier than$222,42736% of homes19% of homes
Price per ft²pricier than$11819% of homes5% of homes
Living areabigger than1,892 ft²62% of homes63% of homes
Lot sizebigger than0.29 ac23% of homes51% of homes
Year builtnewer than192021% of homes11% of homes

About 604 Main St

How much is 604 Main St, Mazon, IL worth?

The TopHap Estimate for 604 Main St, Mazon, IL is $222,427 as of Sep 24, 2026. The likely range is $188,783 to $256,071. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 604 Main St, Mazon, IL last sell?

604 Main St, Mazon, IL last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 604 Main St, Mazon, IL?

604 Main St, Mazon, IL has 1,892 square feet of living space and a 0.29-acre lot.

When was 604 Main St, Mazon, IL built?

604 Main St, Mazon, IL was built in 1920, making it 106 years old.

What schools serve 604 Main St, Mazon, IL?

604 Main St, Mazon, IL is assigned to Mazon-Verona-Kinsman Elementary School (elementary), rated B; Mazon-Verona-Kinsman Middle School (middle), rated C; Seneca High School (high), rated C-. All sit in Seneca Township High School District 160. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 604 Main St, Mazon, IL compare to other homes in Mazon 60444?

Among the 731 homes in Mazon 60444, it is worth more than 36% of them ($222,427 against a typical $268,566), its price per square foot is higher than 19% of them ($118 against a typical $166), it is bigger than 62% of them (1,892 ft² against a typical 1,641 ft²), its lot is bigger than 23% of them (0.29 ac against a typical 0.59 ac) and it is newer than 21% of them (1920 against a typical 1973). Measured against all of Grundy County, it is worth more than 19% 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 604 Main St, Mazon, IL?

The 2025 property tax bill for 604 Main St, Mazon, IL was $5,752. The county assessed it at $63,098.

More homes on Main St

Closest homes

More homes in Mazon 60444

Assigned schools

Explore the area

See this home in context

Open 604 Main St on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map