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Duplex (2 Units, Any Combination)Residential
Last sold for $135,000 on Aug 12, 2021

3121 20TH ST

ROCKFORD, IL 61109
4
Beds
2
Baths
1,863 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.
1971
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
8
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$135,000 · Aug 12, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,843 (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.$43,527 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$2,589
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$40,938
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$39,062
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$130,581

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.35
1
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.
68
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
60
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
31
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Duplex (2 Units, Any Combination)
StyleThe architectural style of the home, such as ranch or colonial.Ranch
CountyWINNEBAGO
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.Brick
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Yes
CoolingThe type of cooling or air conditioning in the home.Central
PoolWhether the property has a pool, and what kind, such as in-ground.No
ViewThe type of view from the property, or another feature of the site that affects value.Traffic

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

E
Riverdahl Elementary SchoolD+
Elementary · Grades KG–5 · 1.5 mi
H
Jefferson High SchoolF
High · Grades 9–12 · 1.8 mi
M
RESA Middle SchoolD
Middle · Grades 6–8 · 3.7 mi

District: Rockford School District 205

Neighborhood · ZIP 61109These 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.100
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.88
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.42

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.93%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.14%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.15%
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.26,851
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.669 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$61,982
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$73,739
Average tempThe average temperature here across a full year.48°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.52%

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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

3121 20th 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.

  • Bigger than 67% of homes in Winnebago County
  • Has a smaller lot than 90% of homes in Rockford 61109

How it measures up in Rockford 61109

The dot is this home. The mark in the middle is the typical home in Rockford 61109.

Living area1,863 ft²
SmallerTypical 1,885 ft²Bigger

Bigger than 48% of homes nearby

Lot size0.15 ac
SmallerTypical 0.3 acBigger

Bigger than 10% of homes nearby

Year built1971
OlderTypical 1970Newer

Newer than 54% of homes nearby

How 3121 20th St ranks against every home in each area.
MeasureThis homeRockford 61109Winnebago County
Living areabigger than1,863 ft²48% of homes67% of homes
Lot sizebigger than0.15 ac10% of homes11% of homes
Year builtnewer than197154% of homes57% of homes

About 3121 20th St

When did 3121 20th St, Rockford, IL last sell?

3121 20th St, Rockford, IL last sold on Aug 12, 2021 for $135,000, according to the county's recorded deed.

How big is 3121 20th St, Rockford, IL?

3121 20th St, Rockford, IL has 4 bedrooms, 2 bathrooms, 1,863 square feet of living space and a 0.15-acre lot.

When was 3121 20th St, Rockford, IL built?

3121 20th St, Rockford, IL was built in 1971, making it 55 years old. It is a ranch home. The building has 1 story.

What schools serve 3121 20th St, Rockford, IL?

3121 20th St, Rockford, IL is assigned to Riverdahl Elementary School (elementary), rated D+; Jefferson High School (high), rated F; RESA Middle School (middle), rated D. All sit in Rockford School District 205. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 3121 20th St, Rockford, IL compare to other homes in Rockford 61109?

Among the 8,744 homes in Rockford 61109, it is bigger than 48% of them (1,863 ft² against a typical 1,885 ft²), its lot is bigger than 10% of them (0.15 ac against a typical 0.3 ac) and it is newer than 54% of them (1971 against a typical 1970). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 3121 20th St, Rockford, IL?

The 2025 property tax bill for 3121 20th St, Rockford, IL was $3,843. The county assessed it at $43,527.

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