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Single Family ResidenceResidential
$147,902$71 / 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 Oct 21, 2026
Last sold for $39,900 on Dec 20, 1988

540 GAYNOR ST

BELVIDERE, IL 61008
4
Beds
1
Baths
2,081 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.
8
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$148K
$139K low$157K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$39,900 · Dec 20, 1988

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,360 (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.$41,559 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,922
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$39,637
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$31,094
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$124,677

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
93
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
5
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.
71
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
26
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.83 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
CountyBOONE
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1950
Lot (acres)The size of the land the home sits on, from county records.0.20
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.No Foundation
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.None
FireplaceWhether the home has a fireplace, and what kind.Yes
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

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

E
Perry Elementary SchoolD+
Elementary · Grades EE–5 · 0.3 mi
M
Belvidere Central Middle SchoolC-
Middle · Grades 6–8 · 1.9 mi
H
Belvidere North High SchoolC-
High · Grades 9–12 · 2.4 mi

District: Belvidere Consolidated Unit School District 100

Neighborhood · ZIP 61008These 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.107
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 100.44

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.12%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.13%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.6%
PopulationHow many people live in this area.33,244
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.379 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$78,704
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$95,641
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.54%

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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

540 Gaynor 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 96% of homes in Boone County
  • Among the lowest price per square foot in Belvidere 61008
  • Bigger than 67% of homes in Belvidere 61008
  • Has a smaller lot than 81% of homes in Boone County
  • Older than 88% of homes in Boone County

What homes are worth in Belvidere 61008

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

This home
$125K$733K

This home is worth more than 5% of homes in Belvidere 61008.

How it measures up in Belvidere 61008

The dot is this home. The mark in the middle is the typical home in Belvidere 61008.

Estimated value$147,902
CheaperTypical $264,526Pricier

Pricier than 5% of homes nearby

Price per ft²$71
CheaperTypical $155Pricier

Cheaper than almost all homes nearby

Living area2,081 ft²
SmallerTypical 1,680 ft²Bigger

Bigger than 67% of homes nearby

Lot size0.2 ac
SmallerTypical 0.27 acBigger

Bigger than 29% of homes nearby

Year built1900
OlderTypical 1976Newer

Newer than 15% of homes nearby

How 540 Gaynor St ranks against every home in each area.
MeasureThis homeBelvidere 61008Boone County
Estimated valuepricier than$147,9025% of homes4% of homes
Price per ft²pricier than$71almost no homesalmost no homes
Living areabigger than2,081 ft²67% of homes62% of homes
Lot sizebigger than0.2 ac29% of homes19% of homes
Year builtnewer than190015% of homes12% of homes

About 540 Gaynor St

How much is 540 Gaynor St, Belvidere, IL worth?

The TopHap Estimate for 540 Gaynor St, Belvidere, IL is $147,902 as of Oct 21, 2026. The likely range is $138,620 to $157,184. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 540 Gaynor St, Belvidere, IL last sell?

540 Gaynor St, Belvidere, IL last sold on Dec 20, 1988 for $39,900, according to the county's recorded deed.

How big is 540 Gaynor St, Belvidere, IL?

540 Gaynor St, Belvidere, IL has 4 bedrooms, 1 bathrooms, 2,081 square feet of living space and a 0.20-acre lot.

When was 540 Gaynor St, Belvidere, IL built?

540 Gaynor St, Belvidere, IL was built in 1900, making it 126 years old. The building has 1 story.

What schools serve 540 Gaynor St, Belvidere, IL?

540 Gaynor St, Belvidere, IL is assigned to Perry Elementary School (elementary), rated D+; Belvidere Central Middle School (middle), rated C-; Belvidere North High School (high), rated C-. All sit in Belvidere Consolidated Unit School District 100. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 540 Gaynor St, Belvidere, IL compare to other homes in Belvidere 61008?

Among the 11,326 homes in Belvidere 61008, it is worth more than 5% of them ($147,902 against a typical $264,526), its price per square foot is higher than almost none of them ($71 against a typical $155), it is bigger than 67% of them (2,081 ft² against a typical 1,680 ft²), its lot is bigger than 29% of them (0.2 ac against a typical 0.27 ac) and it is newer than 15% of them (1900 against a typical 1976). Measured against all of Boone County, it is worth more than 4% 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 540 Gaynor St, Belvidere, IL?

The 2025 property tax bill for 540 Gaynor St, Belvidere, IL was $3,360. The county assessed it at $41,559.

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