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Single Family ResidenceResidential
$64,269$79 / 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 92How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026

3603 SUNNYSIDE AVE

ROCKFORD, IL 61101
2
Beds
1
Baths
816 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.
1952
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
4
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

$64K
$59K low$70K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$768 (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.$8,700 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$763
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$7,937
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$7,808
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$26,100

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.52
95
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
1
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
69
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
65
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.67 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.1 percent flood zone

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.Ranch
CountyWINNEBAGO
Lot (acres)The size of the land the home sits on, from county records.0.15
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Pier/Post & Beam
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, Detached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(7)

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
West Middle SchoolF
Middle · Grades 6–8 · 0.9 mi
H
Auburn High SchoolD+
High · Grades 9–12 · 1.3 mi
E
McIntosh Elementary SchoolF
Elementary · Grades KG–5 · 1.3 mi

District: Rockford School District 205

Neighborhood · ZIP 61101These 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.131
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.86
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.39

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.9.7%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.30%
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.19,188
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.457 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$50,496
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$62,438
Average tempThe average temperature here across a full year.48°F
Annual precipHow much rain and melted snow falls here in a typical year.35 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

3603 Sunnyside 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 less than 97% of homes in Winnebago County
  • Costs less per square foot than 87% of homes in Winnebago County
  • Smaller than 96% of homes in Winnebago County
  • Has a smaller lot than 88% of homes in Winnebago County
  • Older than 70% of homes in Winnebago County

What homes are worth in Rockford 61101

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

This home
$48K$350K

This home is worth more than 11% of homes in Rockford 61101.

How it measures up in Rockford 61101

The dot is this home. The mark in the middle is the typical home in Rockford 61101.

Estimated value$64,269
CheaperTypical $102,060Pricier

Pricier than 11% of homes nearby

Price per ft²$79
CheaperTypical $84Pricier

Pricier than 43% of homes nearby

Living area816 ft²
SmallerTypical 1,316 ft²Bigger

Bigger than 10% of homes nearby

Lot size0.15 ac
SmallerTypical 0.19 acBigger

Bigger than 32% of homes nearby

Year built1952
OlderTypical 1950Newer

Newer than 55% of homes nearby

How 3603 Sunnyside Ave ranks against every home in each area.
MeasureThis homeBeverly ParkRockford 61101Winnebago County
Estimated valuepricier than$64,26921% of homes11% of homes3% of homes
Price per ft²pricier than$7933% of homes43% of homes13% of homes
Living areabigger than816 ft²38% of homes10% of homes4% of homes
Lot sizebigger than0.15 ac71% of homes32% of homes12% of homes
Year builtnewer than195256% of homes55% of homes30% of homes

About 3603 Sunnyside Ave

How much is 3603 Sunnyside Ave, Rockford, IL worth?

The TopHap Estimate for 3603 Sunnyside Ave, Rockford, IL is $64,269 as of Oct 21, 2026. The likely range is $58,983 to $69,555. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 3603 Sunnyside Ave, Rockford, IL last sell?

3603 Sunnyside Ave, Rockford, IL last sold on Jan 1, 1900, according to the county's recorded deed. TopHap holds 5 recorded sales for this parcel.

How big is 3603 Sunnyside Ave, Rockford, IL?

3603 Sunnyside Ave, Rockford, IL has 2 bedrooms, 1 bathrooms, 816 square feet of living space and a 0.15-acre lot.

When was 3603 Sunnyside Ave, Rockford, IL built?

3603 Sunnyside Ave, Rockford, IL was built in 1952, making it 74 years old. It is a ranch home. The building has 1 story.

What schools serve 3603 Sunnyside Ave, Rockford, IL?

3603 Sunnyside Ave, Rockford, IL is assigned to West Middle School (middle), rated F; Auburn High School (high), rated D+; McIntosh Elementary School (elementary), rated F. All sit in Rockford School District 205. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 3603 Sunnyside Ave, Rockford, IL compare to other homes in Rockford 61101?

Among the 6,663 homes in Rockford 61101, it is worth more than 11% of them ($64,269 against a typical $102,060), its price per square foot is higher than 43% of them ($79 against a typical $84), it is bigger than 10% of them (816 ft² against a typical 1,316 ft²), its lot is bigger than 32% of them (0.15 ac against a typical 0.19 ac) and it is newer than 55% of them (1952 against a typical 1950). Measured against all of Winnebago County, it is worth more than 3% 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 3603 Sunnyside Ave, Rockford, IL?

The 2025 property tax bill for 3603 Sunnyside Ave, Rockford, IL was $768. The county assessed it at $8,700.

More homes on Sunnyside Ave

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