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Single Family ResidenceResidential
$186,156$275 / 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 93How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026

421 SAN MATEO DR

BELLEVILLE, IL 62221
3
Baths
676 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.
1978
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$186K
$174K low$198K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,968 (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.$70,925 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$9,407
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$61,518
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$63,972
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$212,775

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
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.
82
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
70
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
24
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
CountyST. CLAIR
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.1995
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.Masonry/Concrete Masonry Units (Cmus)
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.Mixed
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.Patio · 252 ft²Porch · 112 ft²

Transaction History(2)

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
Whiteside Elementary SchoolC-
Elementary · Grades PK–4 · 0.3 mi
M
Whiteside Middle SchoolC
Middle · Grades 5–8 · 0.7 mi

District: Whiteside School District 115

Neighborhood · ZIP 62221These 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.86
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.93
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.163

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.93%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.24%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.9.6%
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.30,133
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.851 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$88,289
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$101,239
Average tempThe average temperature here across a full year.56°F
Annual precipHow much rain and melted snow falls here in a typical year.40 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.59%

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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

421 San Mateo Dr 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 75% of homes in Belleville 62221
  • Costs more per square foot than 87% of homes in St. Clair County
  • Smaller than 96% of homes in Belleville 62221
  • Has a smaller lot than 71% of homes in Belleville 62221

What homes are worth in Belleville 62221

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

This home
$90K$575K

This home is worth more than 25% of homes in Belleville 62221.

How it measures up in Belleville 62221

The dot is this home. The mark in the middle is the typical home in Belleville 62221.

Estimated value$186,156
CheaperTypical $260,065Pricier

Pricier than 25% of homes nearby

Price per ft²$275
CheaperTypical $184Pricier

Pricier than 81% of homes nearby

Living area676 ft²
SmallerTypical 1,328 ft²Bigger

Bigger than 4% of homes nearby

Lot size0.2 ac
SmallerTypical 0.25 acBigger

Bigger than 29% of homes nearby

Year built1978
OlderTypical 1987Newer

Newer than 38% of homes nearby

How 421 San Mateo Dr ranks against every home in each area.
MeasureThis homeBelleville 62221St. Clair County
Estimated valuepricier than$186,15625% of homes51% of homes
Price per ft²pricier than$27581% of homes87% of homes
Living areabigger than676 ft²4% of homes5% of homes
Lot sizebigger than0.2 ac29% of homes36% of homes
Year builtnewer than197838% of homes61% of homes

About 421 San Mateo Dr

How much is 421 San Mateo Dr, Belleville, IL worth?

The TopHap Estimate for 421 San Mateo Dr, Belleville, IL is $186,156 as of Sep 24, 2026. The likely range is $173,858 to $198,454. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 421 San Mateo Dr, Belleville, IL last sell?

421 San Mateo Dr, Belleville, IL last sold on Aug 28, 2023, according to the county's recorded deed.

How big is 421 San Mateo Dr, Belleville, IL?

421 San Mateo Dr, Belleville, IL has 3 bathrooms, 676 square feet of living space and a 0.20-acre lot.

When was 421 San Mateo Dr, Belleville, IL built?

421 San Mateo Dr, Belleville, IL was built in 1978, making it 48 years old. The building has 1 story.

What schools serve 421 San Mateo Dr, Belleville, IL?

421 San Mateo Dr, Belleville, IL is assigned to Whiteside Elementary School (elementary), rated C-; Whiteside Middle School (middle), rated C. All sit in Whiteside School District 115. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 421 San Mateo Dr, Belleville, IL compare to other homes in Belleville 62221?

Among the 10,192 homes in Belleville 62221, it is worth more than 25% of them ($186,156 against a typical $260,065), its price per square foot is higher than 81% of them ($275 against a typical $184), it is bigger than 4% of them (676 ft² against a typical 1,328 ft²), its lot is bigger than 29% of them (0.2 ac against a typical 0.25 ac) and it is newer than 38% of them (1978 against a typical 1987). Measured against all of St. Clair County, it is worth more than 51% 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 421 San Mateo Dr, Belleville, IL?

The 2025 property tax bill for 421 San Mateo Dr, Belleville, IL was $3,968. The county assessed it at $70,925.

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