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Single Family ResidenceResidential
$292,456$139 / 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 93How 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
Last sold for $255,000 on Oct 29, 2021

509 S PROSPECT AVE

CHAMPAIGN, IL 61820
2
Baths
2,099 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.
0.4 ac
Lot SizeThe size of the land the home sits on, from county records.
1941
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$292K
$271K low$313K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$255,000 · Oct 29, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,046 (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.$84,530 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$35,460
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$49,070
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$75,330
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$253,590

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyCHAMPAIGN
Lot (acres)The size of the land the home sits on, from county records.0.40
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Mat/Raft Foundation (Slab)
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Yes
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(5)

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
South Side Elementary SchoolB
Elementary · Grades KG–5 · 0.3 mi
H
Central High SchoolB
High · Grades 9–12 · 0.5 mi
M
Edison Middle SchoolC-
Middle · Grades 6–8 · 0.6 mi

District: Champaign Community Unit School District 4

Neighborhood · ZIP 61820These 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.126
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 100.45

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.88%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.20%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.38%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.41,375
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.7,160 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$37,027
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$50,653
Average tempThe average temperature here across a full year.52°F
Annual precipHow much rain and melted snow falls here in a typical year.40 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.56%

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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

509 S Prospect 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 more than 85% of homes in Champaign 61820
  • Costs less per square foot than 69% of homes in Champaign County
  • Bigger than 98% of homes in Champaign 61820
  • Has a bigger lot than 97% of homes in Champaign 61820
  • Older than 79% of homes in Champaign County

What homes are worth in Champaign 61820

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

This home
$54K$439K

This home is worth more than 85% of homes in Champaign 61820.

How it measures up in Champaign 61820

The dot is this home. The mark in the middle is the typical home in Champaign 61820.

Estimated value$292,456
CheaperTypical $177,261Pricier

Pricier than 85% of homes nearby

Price per ft²$139
CheaperTypical $158Pricier

Pricier than 39% of homes nearby

Living area2,099 ft²
SmallerTypical 1,048 ft²Bigger

Bigger than 98% of homes nearby

Lot size0.4 ac
SmallerTypical 0.18 acBigger

Bigger than 97% of homes nearby

Year built1941
OlderTypical 1940Newer

Newer than 51% of homes nearby

How 509 S Prospect Ave ranks against every home in each area.
MeasureThis homeChampaign 61820Champaign County
Estimated valuepricier than$292,45685% of homes68% of homes
Price per ft²pricier than$13939% of homes31% of homes
Living areabigger than2,099 ft²98% of homes93% of homes
Lot sizebigger than0.4 ac97% of homes75% of homes
Year builtnewer than194151% of homes21% of homes

About 509 S Prospect Ave

How much is 509 S Prospect Ave, Champaign, IL worth?

The TopHap Estimate for 509 S Prospect Ave, Champaign, IL is $292,456 as of Sep 24, 2026. The likely range is $271,488 to $313,424. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 509 S Prospect Ave, Champaign, IL last sell?

509 S Prospect Ave, Champaign, IL last sold on Oct 29, 2021 for $255,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 509 S Prospect Ave, Champaign, IL?

509 S Prospect Ave, Champaign, IL has 2 bathrooms, 2,099 square feet of living space and a 0.40-acre lot.

When was 509 S Prospect Ave, Champaign, IL built?

509 S Prospect Ave, Champaign, IL was built in 1941, making it 85 years old. The building has 1 story.

What schools serve 509 S Prospect Ave, Champaign, IL?

509 S Prospect Ave, Champaign, IL is assigned to South Side Elementary School (elementary), rated B; Central High School (high), rated B; Edison Middle School (middle), rated C-. All sit in Champaign Community Unit School District 4. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 509 S Prospect Ave, Champaign, IL compare to other homes in Champaign 61820?

Among the 4,843 homes in Champaign 61820, it is worth more than 85% of them ($292,456 against a typical $177,261), its price per square foot is higher than 39% of them ($139 against a typical $158), it is bigger than 98% of them (2,099 ft² against a typical 1,048 ft²), its lot is bigger than 97% of them (0.4 ac against a typical 0.18 ac) and it is newer than 51% of them (1941 against a typical 1940). Measured against all of Champaign County, it is worth more than 68% 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 S Prospect Ave, Champaign, IL?

The 2024 property tax bill for 509 S Prospect Ave, Champaign, IL was $6,046. The county assessed it at $84,530.

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