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Single Family ResidenceResidential
$127,999$100 / 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 95How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $40,000 on Nov 1, 1998

1815 S COMMONWEALTH ST

DECATUR, IL 62521
1
Baths
1,282 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.
0.44 ac
Lot SizeThe size of the land the home sits on, from county records.
1954
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$128K
$121K low$135K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$40,000 · Nov 1, 1998

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,346 (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.$30,199 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$6,745
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$23,454
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$27,531
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$90,606

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.50
46
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
16
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
83
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
66
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
43
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.11 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyMACON
Lot (acres)The size of the land the home sits on, from county records.0.44
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.No Foundation
FireplaceWhether the home has a fireplace, and what kind.Yes
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
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 200 ft²

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

E
E. J. Muffley Elementary SchoolD
Elementary · Grades KG–6 · 0.8 mi
H
Eisenhower High SchoolD-
High · Grades 9–12 · 2.2 mi
M
Stephen Decatur Middle SchoolD-
Middle · Grades 7–8 · 5.2 mi

District: Decatur School District 61

Neighborhood · ZIP 62521These 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.94
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.89
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.55

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.14%
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.32,847
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.522 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$67,684
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$82,291
Average tempThe average temperature here across a full year.53°F
Annual precipHow much rain and melted snow falls here in a typical year.39 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.59%

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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

1815 S Commonwealth 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 68% of homes in Muffley
  • Costs less per square foot than 78% of homes in Decatur 62521
  • Has a bigger lot than 65% of homes in Macon County
  • Older than 69% of homes in Decatur 62521

What homes are worth in Decatur 62521

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

This home
$35K$554K

This home is worth more than 44% of homes in Decatur 62521.

How it measures up in Decatur 62521

The dot is this home. The mark in the middle is the typical home in Decatur 62521.

Estimated value$127,999
CheaperTypical $143,684Pricier

Pricier than 44% of homes nearby

Price per ft²$100
CheaperTypical $130Pricier

Pricier than 22% of homes nearby

Living area1,282 ft²
SmallerTypical 1,281 ft²Bigger

Bigger than 50% of homes nearby

Lot size0.44 ac
SmallerTypical 0.28 acBigger

Bigger than 58% of homes nearby

Year built1954
OlderTypical 1962Newer

Newer than 31% of homes nearby

How 1815 S Commonwealth St ranks against every home in each area.
MeasureThis homeMuffleyDecatur 62521Macon County
Estimated valuepricier than$127,99932% of homes44% of homes47% of homes
Price per ft²pricier than$10024% of homes22% of homes37% of homes
Living areabigger than1,282 ft²59% of homes50% of homes56% of homes
Lot sizebigger than0.44 ac38% of homes58% of homes65% of homes
Year builtnewer than195438% of homes31% of homes40% of homes

About 1815 S Commonwealth St

How much is 1815 S Commonwealth St, Decatur, IL worth?

The TopHap Estimate for 1815 S Commonwealth St, Decatur, IL is $127,999 as of Aug 30, 2026. The likely range is $121,077 to $134,921. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 1815 S Commonwealth St, Decatur, IL last sell?

1815 S Commonwealth St, Decatur, IL last sold on Nov 1, 1998 for $40,000, according to the county's recorded deed.

How big is 1815 S Commonwealth St, Decatur, IL?

1815 S Commonwealth St, Decatur, IL has 1 bathrooms, 1,282 square feet of living space and a 0.44-acre lot.

When was 1815 S Commonwealth St, Decatur, IL built?

1815 S Commonwealth St, Decatur, IL was built in 1954, making it 72 years old. The building has 1 story.

What schools serve 1815 S Commonwealth St, Decatur, IL?

1815 S Commonwealth St, Decatur, IL is assigned to E. J. Muffley Elementary School (elementary), rated D; Eisenhower High School (high), rated D-; Stephen Decatur Middle School (middle), rated D-. All sit in Decatur School District 61. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 1815 S Commonwealth St, Decatur, IL compare to other homes in Decatur 62521?

Among the 14,947 homes in Decatur 62521, it is worth more than 44% of them ($127,999 against a typical $143,684), its price per square foot is higher than 22% of them ($100 against a typical $130), it is bigger than 50% of them (1,282 ft² against a typical 1,281 ft²), its lot is bigger than 58% of them (0.44 ac against a typical 0.28 ac) and it is newer than 31% of them (1954 against a typical 1962). Measured against all of Macon County, it is worth more than 47% 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 1815 S Commonwealth St, Decatur, IL?

The 2025 property tax bill for 1815 S Commonwealth St, Decatur, IL was $2,346. The county assessed it at $30,199.

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