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Single Family ResidenceResidential
$265,651$73 / 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 84How 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
Last sold for $213,000 on Dec 13, 2001

1121 COSPER PL

ROCKFORD, IL 61107
4
Beds
4
Baths
3,625 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.
1.08 ac
Lot SizeThe size of the land the home sits on, from county records.
1900
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
9
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

$266K
$223K low$308K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$213,000 · Dec 13, 2001
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.$75,651
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$60,521
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.71%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$170,000
AMCORE BANK · R · recorded Jul 11, 2003
2nd MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$20,000
AMCORE BANK

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,696 (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.$109,495 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$22,477
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$87,018
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$98,263
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$328,485

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.
14
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.
62
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.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Colonial
CountyWINNEBAGO
ConstructionThe main material the home's frame and walls are built from.Brick
HeatingThe type of heating system in the home.Yes
CoolingThe type of cooling or air conditioning in the home.Central
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, Attached
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.Deck · 80 ft²

Transaction History(2)

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.

M
Eisenhower Middle SchoolD
Middle · Grades 6–8 · 1.8 mi
E
Carlson Elementary SchoolC
Elementary · Grades KG–5 · 2.6 mi
H
Guilford High SchoolD
High · Grades 9–12 · 3.6 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%

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.No

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

1121 Cosper Pl 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 80% of homes in Brown Hills / Knightville
  • Costs less per square foot than 97% of homes in Rockford 61107
  • Bigger than 96% of homes in Winnebago County
  • Has a bigger lot than 98% of homes in Brown Hills / Knightville
  • Older than 97% of homes in Rockford 61107

What homes are worth in Rockford 61107

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

This home
$99K$563K

This home is worth more than 68% of homes in Rockford 61107.

How it measures up in Rockford 61107

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

Estimated value$265,651
CheaperTypical $224,539Pricier

Pricier than 68% of homes nearby

Price per ft²$73
CheaperTypical $118Pricier

Pricier than 3% of homes nearby

Living area3,625 ft²
SmallerTypical 1,932 ft²Bigger

Bigger than 95% of homes nearby

Lot size1.08 ac
SmallerTypical 0.26 acBigger

Bigger than 91% of homes nearby

Year built1900
OlderTypical 1959Newer

Newer than 3% of homes nearby

How 1121 Cosper Pl ranks against every home in each area.
MeasureThis homeBrown Hills / KnightvilleRockford 61107Winnebago County
Estimated valuepricier than$265,65180% of homes68% of homes71% of homes
Price per ft²pricier than$736% of homes3% of homes12% of homes
Living areabigger than3,625 ft²93% of homes95% of homes96% of homes
Lot sizebigger than1.08 ac98% of homes91% of homes89% of homes
Year builtnewer than190012% of homes3% of homes4% of homes

About 1121 Cosper Pl

How much is 1121 Cosper Pl, Rockford, IL worth?

The TopHap Estimate for 1121 Cosper Pl, Rockford, IL is $265,651 as of Jul 14, 2026. The likely range is $223,395 to $307,907. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 1121 Cosper Pl, Rockford, IL last sell?

1121 Cosper Pl, Rockford, IL last sold on Dec 13, 2001 for $213,000, according to the county's recorded deed.

How big is 1121 Cosper Pl, Rockford, IL?

1121 Cosper Pl, Rockford, IL has 4 bedrooms, 4 bathrooms and 3,625 square feet of living space.

When was 1121 Cosper Pl, Rockford, IL built?

1121 Cosper Pl, Rockford, IL was built in 1900, making it 126 years old. It is a colonial home. The building has 2 stories.

What schools serve 1121 Cosper Pl, Rockford, IL?

1121 Cosper Pl, Rockford, IL is assigned to Eisenhower Middle School (middle), rated D; Carlson Elementary School (elementary), rated C; Guilford High School (high), rated D. All sit in Rockford School District 205. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 1121 Cosper Pl, Rockford, IL compare to other homes in Rockford 61107?

Among the 11,017 homes in Rockford 61107, it is worth more than 68% of them ($265,651 against a typical $224,539), its price per square foot is higher than 3% of them ($73 against a typical $118), it is bigger than 95% of them (3,625 ft² against a typical 1,932 ft²), its lot is bigger than 91% of them (1.08 ac against a typical 0.26 ac) and it is newer than 3% of them (1900 against a typical 1959). Measured against all of Winnebago County, it is worth more than 71% 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 1121 Cosper Pl, Rockford, IL?

The 2025 property tax bill for 1121 Cosper Pl, Rockford, IL was $8,696. The county assessed it at $109,495.

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