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Residential (General/Single)Residential
$458,979$250 / 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 91How 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

12400 ROSEMARY AVE

NEW BERLIN, WI 53151
4
Beds
2
Baths
1,836 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.
1.85 ac
Lot SizeThe size of the land the home sits on, from county records.
1953
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

$459K
$419K low$498K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,532 (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.$449,600 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$180,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$269,600
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$507,600

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.72 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.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.Residential (General/Single)
StyleThe architectural style of the home, such as ranch or colonial.Ranch
CountyWAUKESHA
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
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.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.Deck

Transaction History(3)

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
Elmwood Elementary SchoolA
Elementary · Grades PK–6 · 1.0 mi
M
Eisenhower Middle/HighA+
Middle · Grades 7–12 · 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

12400 Rosemary 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 70% of homes in New Berlin 53151
  • Costs more per square foot than 71% of homes in New Berlin 53151
  • Has a bigger lot than 86% of homes in Waukesha County
  • Older than 90% 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
$198K$833K

This home is worth more than 70% 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$458,979
CheaperTypical $397,965Pricier

Pricier than 70% of homes nearby

Price per ft²$250
CheaperTypical $229Pricier

Pricier than 71% of homes nearby

Living area1,836 ft²
SmallerTypical 1,752 ft²Bigger

Bigger than 54% of homes nearby

Lot size1.85 ac
SmallerTypical 0.46 acBigger

Bigger than 85% of homes nearby

Year built1953
OlderTypical 1977Newer

Newer than 10% of homes nearby

How 12400 Rosemary Ave ranks against every home in each area.
MeasureThis homeNew Berlin 53151Waukesha County
Estimated valuepricier than$458,97970% of homes47% of homes
Price per ft²pricier than$25071% of homes55% of homes
Living areabigger than1,836 ft²54% of homes52% of homes
Lot sizebigger than1.85 ac85% of homes86% of homes
Year builtnewer than195310% of homes15% of homes

About 12400 Rosemary Ave

How much is 12400 Rosemary Ave, New Berlin, WI worth?

The TopHap Estimate for 12400 Rosemary Ave, New Berlin, WI is $458,979 as of Jul 14, 2026. The likely range is $419,468 to $498,490. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 12400 Rosemary Ave, New Berlin, WI last sell?

12400 Rosemary Ave, New Berlin, WI last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 12400 Rosemary Ave, New Berlin, WI?

12400 Rosemary Ave, New Berlin, WI has 4 bedrooms, 2 bathrooms and 1,836 square feet of living space.

When was 12400 Rosemary Ave, New Berlin, WI built?

12400 Rosemary Ave, New Berlin, WI was built in 1953, making it 73 years old. It is a ranch home. The building has 1 story.

What schools serve 12400 Rosemary Ave, New Berlin, WI?

12400 Rosemary Ave, New Berlin, WI is assigned to Elmwood Elementary School (elementary), rated A; Eisenhower Middle/High (middle), rated A+. All sit in New Berlin School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 12400 Rosemary Ave, 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 70% of them ($458,979 against a typical $397,965), its price per square foot is higher than 71% of them ($250 against a typical $229), it is bigger than 54% of them (1,836 ft² against a typical 1,752 ft²), its lot is bigger than 85% of them (1.85 ac against a typical 0.46 ac) and it is newer than 10% of them (1953 against a typical 1977). Measured against all of Waukesha County, it is worth more than 47% 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 12400 Rosemary Ave, New Berlin, WI?

The 2025 property tax bill for 12400 Rosemary Ave, New Berlin, WI was $5,532. The county assessed it at $449,600.

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