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Single Family ResidenceResidential
$72,683$65 / 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 87How 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
Last sold for $40,000 on Jun 21, 2023

510 KNOWLTON ST

ROCKFORD, IL 61102
3
Beds
1
Baths
1,117 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.
0.2 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.
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
$63K low$82K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$40,000 · Jun 21, 2023

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,104 (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.$23,830 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,323
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$22,507
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$21,385
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$71,490

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.
63
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.Bungalow
CountyWINNEBAGO
Lot (acres)The size of the land the home sits on, from county records.0.20
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
ViewThe type of view from the property, or another feature of the site that affects value.Alley
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck · 160 ft²

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.

Foreclosure Filings(2)

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

E
Washington Elementary SchoolF
Elementary · Grades KG–5 · 0.2 mi
M
RESA Middle SchoolF
Middle · Grades 6–8 · 1.3 mi
H
Jefferson High SchoolF
High · Grades 9–12 · 4.9 mi

District: Rockford School District 205

Neighborhood · ZIP 61102These 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.129
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.89%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.8.4%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.23%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.17,742
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.531 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$49,970
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$60,941
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

510 Knowlton 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 95% of homes in Winnebago County
  • Costs less per square foot than 93% of homes in Winnebago County
  • Smaller than 81% of homes in Winnebago County
  • Has a smaller lot than 69% of homes in Winnebago County
  • Older than 96% of homes in Winnebago County

What homes are worth in Rockford 61102

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

This home
$41K$433K

This home is worth more than 25% of homes in Rockford 61102.

How it measures up in Rockford 61102

The dot is this home. The mark in the middle is the typical home in Rockford 61102.

Estimated value$72,683
CheaperTypical $105,050Pricier

Pricier than 25% of homes nearby

Price per ft²$65
CheaperTypical $81Pricier

Pricier than 30% of homes nearby

Living area1,117 ft²
SmallerTypical 1,400 ft²Bigger

Bigger than 28% of homes nearby

Lot size0.2 ac
SmallerTypical 0.24 acBigger

Bigger than 40% of homes nearby

Year built1900
OlderTypical 1949Newer

Newer than 11% of homes nearby

How 510 Knowlton St ranks against every home in each area.
MeasureThis homeSwifftRockford 61102Winnebago County
Estimated valuepricier than$72,68332% of homes25% of homes5% of homes
Price per ft²pricier than$6536% of homes30% of homes7% of homes
Living areabigger than1,117 ft²37% of homes28% of homes19% of homes
Lot sizebigger than0.2 ac55% of homes40% of homes31% of homes
Year builtnewer than190012% of homes11% of homes4% of homes

About 510 Knowlton St

How much is 510 Knowlton St, Rockford, IL worth?

The TopHap Estimate for 510 Knowlton St, Rockford, IL is $72,683 as of Oct 21, 2026. The likely range is $63,438 to $81,928. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 510 Knowlton St, Rockford, IL last sell?

510 Knowlton St, Rockford, IL last sold on Jun 21, 2023 for $40,000, according to the county's recorded deed. TopHap holds 5 recorded sales for this parcel.

How big is 510 Knowlton St, Rockford, IL?

510 Knowlton St, Rockford, IL has 3 bedrooms, 1 bathrooms, 1,117 square feet of living space and a 0.20-acre lot.

When was 510 Knowlton St, Rockford, IL built?

510 Knowlton St, Rockford, IL was built in 1900, making it 126 years old. It is a bungalow home. The building has 1 story.

What schools serve 510 Knowlton St, Rockford, IL?

510 Knowlton St, Rockford, IL is assigned to Washington Elementary School (elementary), rated F; RESA Middle School (middle), rated F; 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 510 Knowlton St, Rockford, IL compare to other homes in Rockford 61102?

Among the 5,908 homes in Rockford 61102, it is worth more than 25% of them ($72,683 against a typical $105,050), its price per square foot is higher than 30% of them ($65 against a typical $81), it is bigger than 28% of them (1,117 ft² against a typical 1,400 ft²), its lot is bigger than 40% of them (0.2 ac against a typical 0.24 ac) and it is newer than 11% of them (1900 against a typical 1949). Measured against all of Winnebago County, it is worth more than 5% 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 510 Knowlton St, Rockford, IL?

The 2025 property tax bill for 510 Knowlton St, Rockford, IL was $2,104. The county assessed it at $23,830.

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