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Residential (General/Single)Residential
$47,432$49 / 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 88How 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

509 18TH AVE

ROCK ISLAND, IL 61201
0
Baths
967 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.
3,711 ft²
Lot SizeThe size of the land the home sits on, from county records.
1921
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$47K
$42K low$53K 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.$47,432
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$37,946

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,408 (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.$19,884 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,180
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$18,704
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$18,259
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$59,652

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Residential (General/Single)
CountyROCK ISLAND
Lot (acres)The size of the land the home sits on, from county records.0.39
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 · 0.7 mi
H
Rock Island High SchoolD-
High · Grades 9–12 · 0.8 mi
M
Edison Jr High SchoolD
Middle · Grades 7–8 · 1.7 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.Owner occupied
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

509 18th 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 96% of homes in Rock Island County
  • Costs less per square foot than 94% of homes in Rock Island County
  • Smaller than 79% of homes in Rock Island County
  • Has a smaller lot than 97% of homes in Rock Island 61201
  • Older than 79% 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
$34K$348K

This home is worth more than 9% 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$47,432
CheaperTypical $119,146Pricier

Pricier than 9% of homes nearby

Price per ft²$49
CheaperTypical $95Pricier

Pricier than 16% of homes nearby

Living area967 ft²
SmallerTypical 1,254 ft²Bigger

Bigger than 24% of homes nearby

Lot size3,711 ft²
SmallerTypical 0.16 acBigger

Bigger than 3% of homes nearby

Year built1921
OlderTypical 1940Newer

Newer than 33% of homes nearby

How 509 18th Ave ranks against every home in each area.
MeasureThis homeDouglas ParkRock Island 61201Rock Island County
Estimated valuepricier than$47,43262% of homes9% of homes4% of homes
Price per ft²pricier than$4967% of homes16% of homes6% of homes
Living areabigger than967 ft²41% of homes24% of homes21% of homes
Lot sizebigger than3,711 ft²9% of homes3% of homes3% of homes
Year builtnewer than192173% of homes33% of homes21% of homes

About 509 18th Ave

How much is 509 18th Ave, Rock Island, IL worth?

The TopHap Estimate for 509 18th Ave, Rock Island, IL is $47,432 as of Jul 14, 2026. The likely range is $41,595 to $53,269. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 509 18th Ave, Rock Island, IL last sell?

509 18th Ave, Rock Island, IL last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 509 18th Ave, Rock Island, IL?

509 18th Ave, Rock Island, IL has 967 square feet of living space and a 0.39-acre lot.

When was 509 18th Ave, Rock Island, IL built?

509 18th Ave, Rock Island, IL was built in 1921, making it 105 years old. The building has 1 story.

What schools serve 509 18th Ave, Rock Island, IL?

509 18th 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 509 18th 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 9% of them ($47,432 against a typical $119,146), its price per square foot is higher than 16% of them ($49 against a typical $95), it is bigger than 24% of them (967 ft² against a typical 1,254 ft²), its lot is bigger than 3% of them (3,711 ft² against a typical 0.16 ac) and it is newer than 33% of them (1921 against a typical 1940). Measured against all of Rock Island County, it is worth more than 4% 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 509 18th Ave, Rock Island, IL?

The 2025 property tax bill for 509 18th Ave, Rock Island, IL was $1,408. The county assessed it at $19,884.

More homes on 18th Ave

Closest homes

More homes in Rock Island 61201

Assigned schools

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