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Single Family ResidenceResidential
$642,931$444 / 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 97How 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
Last sold for $276,800 on Aug 6, 2009

421 CLEMONS AVE

MADISON, WI 53704
4
Beds
1
Baths
1,448 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.
3,816 ft²
Lot SizeThe size of the land the home sits on, from county records.
1912
Year BuiltThe year the home was originally built, according to county records.
2
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

$643K
$621K low$665K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$276,800 · Aug 6, 2009

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,915 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$564,800 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$103,800
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$461,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$564,800
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$564,800

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.8 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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.minimal

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.Traditional/Old
CountyDane
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.1981
Lot (acres)The size of the land the home sits on, from county records.0.09
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Block (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.None
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
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 286 ft²

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
O'Keeffe Middle SchoolA
Middle · Grades 6–8 · 0.2 mi
H
East High SchoolA-
High · Grades 9–12 · 0.6 mi
E
Lapham Elementary School
Elementary · Grades PK–2 · 0.8 mi

District: Madison Metropolitan School District

Neighborhood · ZIP 53704These 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.124
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.83
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.21

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.34%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.12%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.8%
PopulationHow many people live in this area.49,468
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,132 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$76,243
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$93,732
Average tempThe average temperature here across a full year.46°F
Annual precipHow much rain and melted snow falls here in a typical year.34 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

421 Clemons 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 more than 92% of homes in Madison 53704
  • Costs more per square foot than 95% of homes in Dane County
  • Smaller than 67% of homes in Dane County
  • Has a smaller lot than 95% of homes in Dane County
  • Older than 95% of homes in Madison 53704

What homes are worth in Madison 53704

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

This home
$179K$1.3M

This home is worth more than 92% of homes in Madison 53704.

How it measures up in Madison 53704

The dot is this home. The mark in the middle is the typical home in Madison 53704.

Estimated value$642,931
CheaperTypical $347,787Pricier

Pricier than 92% of homes nearby

Price per ft²$444
CheaperTypical $237Pricier

Pricier than 94% of homes nearby

Living area1,448 ft²
SmallerTypical 1,497 ft²Bigger

Bigger than 47% of homes nearby

Lot size3,816 ft²
SmallerTypical 0.19 acBigger

Bigger than 7% of homes nearby

Year built1912
OlderTypical 1960Newer

Newer than 5% of homes nearby

How 421 Clemons Ave ranks against every home in each area.
MeasureThis homeMarquetteMadison 53704Dane County
Estimated valuepricier than$642,93166% of homes92% of homes82% of homes
Price per ft²pricier than$44480% of homes94% of homes95% of homes
Living areabigger than1,448 ft²39% of homes47% of homes33% of homes
Lot sizebigger than3,816 ft²29% of homes7% of homes5% of homes
Year builtnewer than191242% of homes5% of homes5% of homes

About 421 Clemons Ave

How much is 421 Clemons Ave, Madison, WI worth?

The TopHap Estimate for 421 Clemons Ave, Madison, WI is $642,931 as of Sep 24, 2026. The likely range is $620,926 to $664,936. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 421 Clemons Ave, Madison, WI last sell?

421 Clemons Ave, Madison, WI last sold on Aug 6, 2009 for $276,800, according to the county's recorded deed.

How big is 421 Clemons Ave, Madison, WI?

421 Clemons Ave, Madison, WI has 4 bedrooms, 1 bathrooms, 1,448 square feet of living space and a 0.09-acre lot.

When was 421 Clemons Ave, Madison, WI built?

421 Clemons Ave, Madison, WI was built in 1912, making it 114 years old. It is a traditional/old home. The building has 2 stories.

What schools serve 421 Clemons Ave, Madison, WI?

421 Clemons Ave, Madison, WI is assigned to O'Keeffe Middle School (middle), rated A; East High School (high), rated A-; Lapham Elementary School (elementary). All sit in Madison Metropolitan School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 421 Clemons Ave, Madison, WI compare to other homes in Madison 53704?

Among the 15,796 homes in Madison 53704, it is worth more than 92% of them ($642,931 against a typical $347,787), its price per square foot is higher than 94% of them ($444 against a typical $237), it is bigger than 47% of them (1,448 ft² against a typical 1,497 ft²), its lot is bigger than 7% of them (3,816 ft² against a typical 0.19 ac) and it is newer than 5% of them (1912 against a typical 1960). Measured against all of Dane County, it is worth more than 82% 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 Clemons Ave, Madison, WI?

The 2024 property tax bill for 421 Clemons Ave, Madison, WI was $9,915. The county assessed it at $564,800.

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