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Single Family ResidentialResidential
$48,216$45 / 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 75How 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

578 21ST AVE

ROCK ISLAND, IL 61201
1
Baths
1,075 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.
0.45 ac
Lot SizeThe size of the land the home sits on, from county records.
1900
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$48K
$36K low$60K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,238 (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.$18,376 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$8,760
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$9,616
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$16,937
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$55,128

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residential
CountyROCK ISLAND
Lot (acres)The size of the land the home sits on, from county records.0.45
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(1)

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
Frances Willard Elementary SchoolC+
Elementary · Grades PK–6 · 0.3 mi
H
Rock Island High SchoolD-
High · Grades 9–12 · 0.6 mi
M
Edison Jr High SchoolD
Middle · Grades 7–8 · 1.4 mi

District: Rock Island School District 41

Neighborhood · ZIP 61201These 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.114
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.82
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.32

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.90%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.15%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.21%
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.36,706
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,955 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$60,990
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$78,271
Average tempThe average temperature here across a full year.50°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.55%

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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

578 21st 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 97% of homes in Rock Island County
  • Costs less per square foot than 96% of homes in Rock Island County
  • Smaller than 68% of homes in Rock Island County
  • Has a bigger lot than 95% of homes in West Central Rock Island
  • Older than 96% of homes in Rock Island 61201

What homes are worth in Rock Island 61201

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

This home
$35K$357K

This home is worth more than 8% of homes in Rock Island 61201.

How it measures up in Rock Island 61201

The dot is this home. The mark in the middle is the typical home in Rock Island 61201.

Estimated value$48,216
CheaperTypical $122,597Pricier

Pricier than 8% of homes nearby

Price per ft²$45
CheaperTypical $99Pricier

Pricier than 12% of homes nearby

Living area1,075 ft²
SmallerTypical 1,256 ft²Bigger

Bigger than 35% of homes nearby

Lot size0.45 ac
SmallerTypical 0.16 acBigger

Bigger than 90% of homes nearby

Year built1900
OlderTypical 1941Newer

Newer than 4% of homes nearby

How 578 21st Ave ranks against every home in each area.
MeasureThis homeWest Central Rock IslandRock Island 61201Rock Island County
Estimated valuepricier than$48,21632% of homes8% of homes3% of homes
Price per ft²pricier than$4525% of homes12% of homes4% of homes
Living areabigger than1,075 ft²62% of homes35% of homes32% of homes
Lot sizebigger than0.45 ac95% of homes90% of homes77% of homes
Year builtnewer than19006% of homes4% of homes6% of homes

About 578 21st Ave

How much is 578 21st Ave, Rock Island, IL worth?

The TopHap Estimate for 578 21st Ave, Rock Island, IL is $48,216 as of Sep 24, 2026. The likely range is $36,237 to $60,195. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 578 21st Ave, Rock Island, IL last sell?

578 21st Ave, Rock Island, IL last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 578 21st Ave, Rock Island, IL?

578 21st Ave, Rock Island, IL has 1 bathrooms, 1,075 square feet of living space and a 0.45-acre lot.

When was 578 21st Ave, Rock Island, IL built?

578 21st Ave, Rock Island, IL was built in 1900, making it 126 years old. The building has 1 story.

What schools serve 578 21st Ave, Rock Island, IL?

578 21st Ave, Rock Island, IL is assigned to Frances Willard Elementary School (elementary), rated C+; Rock Island High School (high), rated D-; Edison Jr High School (middle), rated D. All sit in Rock Island School District 41. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 578 21st Ave, Rock Island, IL compare to other homes in Rock Island 61201?

Among the 13,020 homes in Rock Island 61201, it is worth more than 8% of them ($48,216 against a typical $122,597), its price per square foot is higher than 12% of them ($45 against a typical $99), it is bigger than 35% of them (1,075 ft² against a typical 1,256 ft²), its lot is bigger than 90% of them (0.45 ac against a typical 0.16 ac) and it is newer than 4% of them (1900 against a typical 1941). Measured against all of Rock Island County, it is worth more than 3% 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 578 21st Ave, Rock Island, IL?

The 2025 property tax bill for 578 21st Ave, Rock Island, IL was $1,238. The county assessed it at $18,376.

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