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Single Family ResidentialResidential
$121,480$42 / 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 61How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jun 23, 2026
Last sold for $80,000 on Oct 24, 2025

4100 12TH ST

ROCK ISLAND, IL 61201
3
Baths
2,860 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.
0.15 ac
Lot SizeThe size of the land the home sits on, from county records.
1925
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$121K
$74K low$169K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$80,000 · Oct 24, 2025
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.$28,680
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$22,944
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.76%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$92,800
CENTRAL STATES MORTGAGE IL · R · recorded Nov 30, 2006

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,603 (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.$36,008 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$6,029
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$29,979
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$33,187
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$108,024

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.0.15
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, Detached
PoolWhether the property has a pool, and what kind, such as in-ground.No

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

M
Edison Jr High SchoolD
Middle · Grades 7–8 · 0.2 mi
E
Earl H Hanson Elementary SchoolC
Elementary · Grades PK–6 · 0.3 mi
H
Rock Island High SchoolD-
High · Grades 9–12 · 1.2 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.36,708
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%

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.Yes

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

4100 12th 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 more than 91% of homes in Rock Riverfront
  • Costs less per square foot than 96% of homes in Rock Island County
  • Bigger than 98% of homes in Rock Riverfront
  • Has a smaller lot than 74% of homes in Rock Island County
  • Older than 75% of homes in Rock Island County

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
$33K$349K

This home is worth more than 52% 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$121,480
CheaperTypical $118,914Pricier

Pricier than 52% of homes nearby

Price per ft²$42
CheaperTypical $96Pricier

Pricier than 11% of homes nearby

Living area2,860 ft²
SmallerTypical 1,250 ft²Bigger

Bigger than 97% of homes nearby

Lot size0.15 ac
SmallerTypical 0.16 acBigger

Bigger than 39% of homes nearby

Year built1925
OlderTypical 1940Newer

Newer than 40% of homes nearby

How 4100 12th St ranks against every home in each area.
MeasureThis homeRock RiverfrontRock Island 61201Rock Island County
Estimated valuepricier than$121,48091% of homes52% of homes34% of homes
Price per ft²pricier than$427% of homes11% of homes4% of homes
Living areabigger than2,860 ft²98% of homes97% of homes97% of homes
Lot sizebigger than0.15 ac46% of homes39% of homes26% of homes
Year builtnewer than192533% of homes40% of homes25% of homes

About 4100 12th St

How much is 4100 12th St, Rock Island, IL worth?

The TopHap Estimate for 4100 12th St, Rock Island, IL is $121,480 as of Jun 23, 2026. The likely range is $74,102 to $168,857. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4100 12th St, Rock Island, IL last sell?

4100 12th St, Rock Island, IL last sold on Oct 24, 2025 for $80,000, according to the county's recorded deed.

How big is 4100 12th St, Rock Island, IL?

4100 12th St, Rock Island, IL has 3 bathrooms, 2,860 square feet of living space and a 0.15-acre lot.

When was 4100 12th St, Rock Island, IL built?

4100 12th St, Rock Island, IL was built in 1925, making it 101 years old. The building has 2 stories.

What schools serve 4100 12th St, Rock Island, IL?

4100 12th St, Rock Island, IL is assigned to Edison Jr High School (middle), rated D; Earl H Hanson Elementary School (elementary), rated C; Rock Island High School (high), rated D-. All sit in Rock Island School District 41. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4100 12th St, 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 52% of them ($121,480 against a typical $118,914), its price per square foot is higher than 11% of them ($42 against a typical $96), it is bigger than 97% of them (2,860 ft² against a typical 1,250 ft²), its lot is bigger than 39% of them (0.15 ac against a typical 0.16 ac) and it is newer than 40% of them (1925 against a typical 1940). Measured against all of Rock Island County, it is worth more than 34% 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 4100 12th St, Rock Island, IL?

The 2025 property tax bill for 4100 12th St, Rock Island, IL was $3,603. The county assessed it at $36,008.

More homes on 12th St

Closest homes

More homes in Rock Island 61201

Assigned schools

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