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Residential (General/Single)Residential
$399,715$205 / 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 95How 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

4420 S 129TH ST

NEW BERLIN, WI 53151
3
Beds
1.5
Baths
1,949 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.
0.63 ac
Lot SizeThe size of the land the home sits on, from county records.
1966
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$400K
$378K low$421K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,844 (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.$394,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$138,800
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$255,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$444,800

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.
8
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
56
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
67
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
33
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
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.Residential (General/Single)
StyleThe architectural style of the home, such as ranch or colonial.Ranch
CountyWAUKESHA
Lot (acres)The size of the land the home sits on, from county records.0.63
RoofThe main material covering the roof, such as asphalt shingle or tile.Tile
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
CoolingThe type of cooling or air conditioning in the home.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
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 · 299 ft²

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

M
Eisenhower Middle/HighA+
Middle · Grades 7–12 · 0.9 mi
E
Elmwood Elementary SchoolA+
Elementary · Grades PK–6 · 2.1 mi

District: New Berlin School District

Neighborhood · ZIP 53151These 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.78
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.76
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.30

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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.3%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.33,202
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,856 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$98,242
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$127,485
Average tempThe average temperature here across a full year.47°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

4420 S 129th 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 69% of homes in Waukesha County
  • Costs less per square foot than 80% of homes in New Berlin 53151
  • Has a bigger lot than 70% of homes in New Berlin 53151
  • Older than 65% of homes in New Berlin 53151

What homes are worth in New Berlin 53151

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

This home
$211K$858K

This home is worth more than 42% of homes in New Berlin 53151.

How it measures up in New Berlin 53151

The dot is this home. The mark in the middle is the typical home in New Berlin 53151.

Estimated value$399,715
CheaperTypical $419,542Pricier

Pricier than 42% of homes nearby

Price per ft²$205
CheaperTypical $238Pricier

Pricier than 20% of homes nearby

Living area1,949 ft²
SmallerTypical 1,759 ft²Bigger

Bigger than 61% of homes nearby

Lot size0.63 ac
SmallerTypical 0.47 acBigger

Bigger than 70% of homes nearby

Year built1966
OlderTypical 1977Newer

Newer than 35% of homes nearby

How 4420 S 129th St ranks against every home in each area.
MeasureThis homeNew Berlin 53151Waukesha County
Estimated valuepricier than$399,71542% of homes31% of homes
Price per ft²pricier than$20520% of homes21% of homes
Living areabigger than1,949 ft²61% of homes58% of homes
Lot sizebigger than0.63 ac70% of homes61% of homes
Year builtnewer than196635% of homes39% of homes

About 4420 S 129th St

How much is 4420 S 129th St, New Berlin, WI worth?

The TopHap Estimate for 4420 S 129th St, New Berlin, WI is $399,715 as of Sep 24, 2026. The likely range is $377,963 to $421,467. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4420 S 129th St, New Berlin, WI last sell?

4420 S 129th St, New Berlin, WI last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 4420 S 129th St, New Berlin, WI?

4420 S 129th St, New Berlin, WI has 3 bedrooms, 1.5 bathrooms, 1,949 square feet of living space and a 0.63-acre lot.

When was 4420 S 129th St, New Berlin, WI built?

4420 S 129th St, New Berlin, WI was built in 1966, making it 60 years old. It is a ranch home. The building has 1 story.

What schools serve 4420 S 129th St, New Berlin, WI?

4420 S 129th St, New Berlin, WI is assigned to Eisenhower Middle/High (middle), rated A+; Elmwood Elementary School (elementary), rated A+. All sit in New Berlin School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4420 S 129th St, New Berlin, WI compare to other homes in New Berlin 53151?

Among the 11,204 homes in New Berlin 53151, it is worth more than 42% of them ($399,715 against a typical $419,542), its price per square foot is higher than 20% of them ($205 against a typical $238), it is bigger than 61% of them (1,949 ft² against a typical 1,759 ft²), its lot is bigger than 70% of them (0.63 ac against a typical 0.47 ac) and it is newer than 35% of them (1966 against a typical 1977). Measured against all of Waukesha County, it is worth more than 31% 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 4420 S 129th St, New Berlin, WI?

The 2025 property tax bill for 4420 S 129th St, New Berlin, WI was $4,844. The county assessed it at $394,000.

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