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Residential (General/Single)Residential
$18,134$44 / 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 54How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026

623 BROOKSIDE AVE

ALTON, IL 62002
0
Baths
416 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.
0.11 ac
Lot SizeThe size of the land the home sits on, from county records.
1920
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
1
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$18K
$10K low$26K high
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$18,134
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$14,507

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$57 (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.$710 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$710
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$640
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$2,130

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.44
42
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
23
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.
4
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.9 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.Residential (General/Single)
StyleThe architectural style of the home, such as ranch or colonial.Conventional
CountyMADISON
Lot (acres)The size of the land the home sits on, from county records.0.11
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
PoolWhether the property has a pool, and what kind, such as in-ground.No

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.

M
Alton Middle SchoolC-
Middle · Grades 6–8 · 1.1 mi
H
Alton High SchoolD+
High · Grades 9–12 · 3.1 mi
E
Gilson Brown Elementary School
Elementary · Grades KG–1 · 4.9 mi

District: Alton Community Unit School District 11

Neighborhood · ZIP 62002These 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.135
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.85
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.125

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.16%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.19%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.1%
PopulationHow many people live in this area.28,813
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.738 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$61,207
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$78,082
Average tempThe average temperature here across a full year.55°F
Annual precipHow much rain and melted snow falls here in a typical year.39 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.59%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Absentee owner
Company ownedWhether the owner is a company or trust rather than a person.Yes

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

623 Brookside 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.

  • Among the least valuable homes in Madison County
  • Costs less per square foot than 97% of homes in Madison County
  • Among the smallest homes in Alton 62002
  • Has a smaller lot than 96% of homes in Madison County
  • Older than 92% of homes in Madison County

What homes are worth in Alton 62002

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

This home
$24K$444K

This home is worth less than almost all homes in Alton 62002.

How it measures up in Alton 62002

The dot is this home. The mark in the middle is the typical home in Alton 62002.

Estimated value$18,134
CheaperTypical $104,003Pricier

Cheaper than almost all homes nearby

Price per ft²$44
CheaperTypical $103Pricier

Pricier than 9% of homes nearby

Living area416 ft²
SmallerTypical 1,008 ft²Bigger

Smaller than almost all homes nearby

Lot size0.11 ac
SmallerTypical 0.19 acBigger

Bigger than 8% of homes nearby

Year built1920
OlderTypical 1948Newer

Newer than 13% of homes nearby

How 623 Brookside Ave ranks against every home in each area.
MeasureThis homeAlton 62002Madison County
Estimated valuepricier than$18,134almost no homesalmost no homes
Price per ft²pricier than$449% of homes3% of homes
Living areabigger than416 ft²almost no homesalmost no homes
Lot sizebigger than0.11 ac8% of homes4% of homes
Year builtnewer than192013% of homes8% of homes

About 623 Brookside Ave

How much is 623 Brookside Ave, Alton, IL worth?

The TopHap Estimate for 623 Brookside Ave, Alton, IL is $18,134 as of Jul 14, 2026. The likely range is $9,819 to $26,449. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 623 Brookside Ave, Alton, IL last sell?

623 Brookside Ave, Alton, IL last sold on Feb 5, 2019, according to the county's recorded deed.

How big is 623 Brookside Ave, Alton, IL?

623 Brookside Ave, Alton, IL has 416 square feet of living space and a 0.11-acre lot.

When was 623 Brookside Ave, Alton, IL built?

623 Brookside Ave, Alton, IL was built in 1920, making it 106 years old. It is a conventional home. The building has 1 story.

What schools serve 623 Brookside Ave, Alton, IL?

623 Brookside Ave, Alton, IL is assigned to Alton Middle School (middle), rated C-; Alton High School (high), rated D+; Gilson Brown Elementary School (elementary). All sit in Alton Community Unit School District 11. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 623 Brookside Ave, Alton, IL compare to other homes in Alton 62002?

Among the 12,598 homes in Alton 62002, it is worth more than almost none of them ($18,134 against a typical $104,003), its price per square foot is higher than 9% of them ($44 against a typical $103), it is bigger than almost none of them (416 ft² against a typical 1,008 ft²), its lot is bigger than 8% of them (0.11 ac against a typical 0.19 ac) and it is newer than 13% of them (1920 against a typical 1948). Measured against all of Madison County, it is worth more than almost no 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 623 Brookside Ave, Alton, IL?

The 2025 property tax bill for 623 Brookside Ave, Alton, IL was $57. The county assessed it at $710.

Closest homes

More homes in Alton 62002

Assigned schools

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