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Single Family ResidenceResidential
$59,017$31 / 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 85How 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

510 S JOHNSTON AVE

ROCKFORD, IL 61102
3
Beds
2
Baths
1,924 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.
0.34 ac
Lot SizeThe size of the land the home sits on, from county records.
1923
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
5
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

$59K
$50K low$68K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,783 (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.$20,197 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,120
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$19,077
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$18,125
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$60,591

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.33
1
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.
64
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.0.34
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

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

E
Ellis Elementary SchoolC-
Elementary · Grades KG–5 · 0.6 mi
M
Kennedy Middle SchoolD-
Middle · Grades 6–8 · 1.0 mi
H
Auburn High SchoolD-
High · Grades 9–12 · 1.2 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 S Johnston 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
  • Among the lowest price per square foot in Winnebago County
  • Bigger than 91% of homes in West Gateway Coalition
  • Has a bigger lot than 91% of homes in West Gateway Coalition
  • Older than 90% 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
$39K$413K

This home is worth more than 16% 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$59,017
CheaperTypical $95,620Pricier

Pricier than 16% of homes nearby

Price per ft²$31
CheaperTypical $75Pricier

Cheaper than almost all homes nearby

Living area1,924 ft²
SmallerTypical 1,400 ft²Bigger

Bigger than 79% of homes nearby

Lot size0.34 ac
SmallerTypical 0.24 acBigger

Bigger than 61% of homes nearby

Year built1923
OlderTypical 1949Newer

Newer than 22% of homes nearby

How 510 S Johnston Ave ranks against every home in each area.
MeasureThis homeWest Gateway CoalitionRockford 61102Winnebago County
Estimated valuepricier than$59,01723% of homes16% of homes3% of homes
Price per ft²pricier than$312% of homesalmost no homesalmost no homes
Living areabigger than1,924 ft²91% of homes79% of homes69% of homes
Lot sizebigger than0.34 ac91% of homes61% of homes59% of homes
Year builtnewer than192339% of homes22% of homes10% of homes

About 510 S Johnston Ave

How much is 510 S Johnston Ave, Rockford, IL worth?

The TopHap Estimate for 510 S Johnston Ave, Rockford, IL is $59,017 as of Aug 30, 2026. The likely range is $49,911 to $68,123. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 510 S Johnston Ave, Rockford, IL last sell?

510 S Johnston Ave, Rockford, IL last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 510 S Johnston Ave, Rockford, IL?

510 S Johnston Ave, Rockford, IL has 3 bedrooms, 2 bathrooms, 1,924 square feet of living space and a 0.34-acre lot.

When was 510 S Johnston Ave, Rockford, IL built?

510 S Johnston Ave, Rockford, IL was built in 1923, making it 103 years old. It is a bungalow home. The building has 1 story.

What schools serve 510 S Johnston Ave, Rockford, IL?

510 S Johnston Ave, Rockford, IL is assigned to Ellis Elementary School (elementary), rated C-; Kennedy Middle School (middle), rated D-; Auburn 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 510 S Johnston Ave, Rockford, IL compare to other homes in Rockford 61102?

Among the 5,908 homes in Rockford 61102, it is worth more than 16% of them ($59,017 against a typical $95,620), its price per square foot is higher than almost none of them ($31 against a typical $75), it is bigger than 79% of them (1,924 ft² against a typical 1,400 ft²), its lot is bigger than 61% of them (0.34 ac against a typical 0.24 ac) and it is newer than 22% of them (1923 against a typical 1949). 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 510 S Johnston Ave, Rockford, IL?

The 2025 property tax bill for 510 S Johnston Ave, Rockford, IL was $1,783. The county assessed it at $20,197.

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