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Single Family ResidenceResidential
$72,786$33 / 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 94How 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

2121 S 4TH ST

ROCKFORD, IL 61104
3
Beds
1
Baths
2,198 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.
0.18 ac
Lot SizeThe size of the land the home sits on, from county records.
1924
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
6
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

$73K
$68K low$77K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,185 (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.$24,751 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$3,462
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$21,289
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$22,212
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$74,253

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.38
33
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.
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.
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.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Bungalow
CountyWINNEBAGO
Lot (acres)The size of the land the home sits on, from county records.0.18
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
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
ViewThe type of view from the property, or another feature of the site that affects value.Alley

Transaction History(1)

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
Riverdahl Elementary SchoolD+
Elementary · Grades KG–5 · 1.6 mi
M
RESA Middle SchoolD
Middle · Grades 6–8 · 2.0 mi
H
Jefferson High SchoolF
High · Grades 9–12 · 3.5 mi

District: Rockford School District 205

Neighborhood · ZIP 61104These 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.157
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.90
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.84%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.6.0%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.36%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.17,656
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,783 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$34,362
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$47,725
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

2121 S 4th 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 94% of homes in Winnebago County
  • Among the lowest price per square foot in Winnebago County
  • Bigger than 79% of homes in Rockford 61104
  • Has a smaller lot than 76% of homes in Winnebago County
  • Older than 90% of homes in Winnebago County

What homes are worth in Rockford 61104

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

This home
$48K$205K

This home is worth more than 16% of homes in Rockford 61104.

How it measures up in Rockford 61104

The dot is this home. The mark in the middle is the typical home in Rockford 61104.

Estimated value$72,786
CheaperTypical $105,626Pricier

Pricier than 16% of homes nearby

Price per ft²$33
CheaperTypical $79Pricier

Cheaper than almost all homes nearby

Living area2,198 ft²
SmallerTypical 1,584 ft²Bigger

Bigger than 79% of homes nearby

Lot size0.18 ac
SmallerTypical 0.17 acBigger

Bigger than 67% of homes nearby

Year built1924
OlderTypical 1920Newer

Newer than 56% of homes nearby

How 2121 S 4th St ranks against every home in each area.
MeasureThis homeRockford 61104Winnebago County
Estimated valuepricier than$72,78616% of homes6% of homes
Price per ft²pricier than$33almost no homesalmost no homes
Living areabigger than2,198 ft²79% of homes78% of homes
Lot sizebigger than0.18 ac67% of homes24% of homes
Year builtnewer than192456% of homes10% of homes

About 2121 S 4th St

How much is 2121 S 4th St, Rockford, IL worth?

The TopHap Estimate for 2121 S 4th St, Rockford, IL is $72,786 as of Aug 30, 2026. The likely range is $68,075 to $77,497. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 2121 S 4th St, Rockford, IL last sell?

2121 S 4th St, Rockford, IL last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 2121 S 4th St, Rockford, IL?

2121 S 4th St, Rockford, IL has 3 bedrooms, 1 bathrooms, 2,198 square feet of living space and a 0.18-acre lot.

When was 2121 S 4th St, Rockford, IL built?

2121 S 4th St, Rockford, IL was built in 1924, making it 102 years old. It is a bungalow home. The building has 1 story.

What schools serve 2121 S 4th St, Rockford, IL?

2121 S 4th St, Rockford, IL is assigned to Riverdahl Elementary School (elementary), rated D+; RESA Middle School (middle), rated D; Jefferson High School (high), rated F. All sit in Rockford School District 205. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 2121 S 4th St, Rockford, IL compare to other homes in Rockford 61104?

Among the 4,606 homes in Rockford 61104, it is worth more than 16% of them ($72,786 against a typical $105,626), its price per square foot is higher than almost none of them ($33 against a typical $79), it is bigger than 79% of them (2,198 ft² against a typical 1,584 ft²), its lot is bigger than 67% of them (0.18 ac against a typical 0.17 ac) and it is newer than 56% of them (1924 against a typical 1920). Measured against all of Winnebago County, it is worth more than 6% 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 2121 S 4th St, Rockford, IL?

The 2025 property tax bill for 2121 S 4th St, Rockford, IL was $2,185. The county assessed it at $24,751.

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