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Duplex (2 Units, Any Combination)Residential
Last sold for $288,000 on Dec 1, 2025

4121 CROSBY ST

ROCKFORD, IL 61107
5
Beds
2
Baths
2,055 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.
0.42 ac
Lot SizeThe size of the land the home sits on, from county records.
1967
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
11
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$288,000 · Dec 1, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,036 (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.$72,538 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$12,361
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$60,177
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$65,097
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$217,614

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.42
36
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
17
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.
61
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.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.6 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.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.0.42
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
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(3)

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
Johnson Elementary SchoolC
Elementary · Grades KG–5 · 0.3 mi
H
East High SchoolF
High · Grades 9–12 · 1.3 mi
M
Lincoln Middle SchoolD
Middle · Grades 6–8 · 2.0 mi

District: Rockford School District 205

Neighborhood · ZIP 61107These 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.89
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.87
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.41

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.24%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.11%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.5%
PopulationHow many people live in this area.29,768
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,019 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$74,050
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$94,291
Average tempThe average temperature here across a full year.48°F
Annual precipHow much rain and melted snow falls here in a typical year.34 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

4121 Crosby 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 74% of homes in Winnebago County
  • Has a bigger lot than 86% of homes in Alpine Ridge
  • Newer than 92% of homes in Alpine Ridge

How it measures up in Rockford 61107

The dot is this home. The mark in the middle is the typical home in Rockford 61107.

Living area2,055 ft²
SmallerTypical 1,932 ft²Bigger

Bigger than 57% of homes nearby

Lot size0.42 ac
SmallerTypical 0.26 acBigger

Bigger than 75% of homes nearby

Year built1967
OlderTypical 1959Newer

Newer than 66% of homes nearby

How 4121 Crosby St ranks against every home in each area.
MeasureThis homeAlpine RidgeRockford 61107Winnebago County
Living areabigger than2,055 ft²67% of homes57% of homes74% of homes
Lot sizebigger than0.42 ac86% of homes75% of homes68% of homes
Year builtnewer than196792% of homes66% of homes53% of homes

About 4121 Crosby St

When did 4121 Crosby St, Rockford, IL last sell?

4121 Crosby St, Rockford, IL last sold on Dec 1, 2025 for $288,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 4121 Crosby St, Rockford, IL?

4121 Crosby St, Rockford, IL has 5 bedrooms, 2 bathrooms, 2,055 square feet of living space and a 0.42-acre lot.

When was 4121 Crosby St, Rockford, IL built?

4121 Crosby St, Rockford, IL was built in 1967, making it 59 years old. It is a ranch home. The building has 1 story.

What schools serve 4121 Crosby St, Rockford, IL?

4121 Crosby St, Rockford, IL is assigned to Johnson Elementary School (elementary), rated C; East High School (high), rated F; Lincoln 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 4121 Crosby St, Rockford, IL compare to other homes in Rockford 61107?

Among the 11,011 homes in Rockford 61107, it is bigger than 57% of them (2,055 ft² against a typical 1,932 ft²), its lot is bigger than 75% of them (0.42 ac against a typical 0.26 ac) and it is newer than 66% of them (1967 against a typical 1959). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 4121 Crosby St, Rockford, IL?

The 2025 property tax bill for 4121 Crosby St, Rockford, IL was $4,036. The county assessed it at $72,538.

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Assigned schools

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